R1245x Series 1.2 A, 30 V Step-Down DC/DC Converter No. EA-269-170720 OUTLINE The R1245x is a CMOS-based Step-down DC/DC converter with internal N-channel high side Tr. The ON resistance of the built-in high-side transistor is 0.35 and the R1245x can provide the maximum 1.2 A output current. Each of the ICs consists of an oscillator, a PWM control circuit, a voltage reference unit, an error amplifier, a phase compensation circuit, a slope compensation circuit, a soft-start circuit, protection circuits, an internal voltage regulator, and a switch for bootstrap circuit. The ICs can make up a step-down DC/DC converter with an inductor, resistors, a diode, and capacitors. The R1245x is a current mode operating type DC/DC converter without an external current sense resistor, and realizes fast response and high efficiency. As an output capacitor, a ceramic type capacitor can be used with the R1245x. The options of the internal oscillator frequency are preset at 330 kHz for version A and B, 500 kHz for version C and D, 1000 kHz for version E and F, 2400 kHz for version G and H. As for protection, an Lx peak current limit circuit cycle by cycle, a thermal shutdown function and an under voltage lockout (UVLO) function are built in. Furthermore, there are two types for short protection, for A/C/E/G version, a latch protection function which makes the output latch off if the output voltage keeps lower than the set output voltage for a certain time after detecting current limit is built in, for B/D/F/H version, a fold-back protection function which changes the oscillator frequency slower after detecting short circuit or equivalent. As for the packages of the R1245x, HSOP-8E, DFN(PLP)2020-8, SOT23-6W are available. FEATURES * * * * * * * * * * * * Operating Voltage ****************************************** 4.5 V to 30 V Internal N-channel MOSFET Driver ********************** Typ. RON = 0.35 Adjustable Output Voltage with External Resistor **** 0.8 V or more Feedback Voltage and Tolerance ************************* 0.8 V1.0% Peak Current Limit ******************************************** Typ. 2.0 A UVLO Function Released Voltage ************************ Typ. 4.0 V Operating Frequency **************************************** 330 kHz (Ver. A/B), 500 kHz (Ver. C/D), 1000 kHz (Ver. E/F), 2400 kHz (Ver. G/H) Fold-back Protected Frequency *************************** 170 kHz (Ver. B/D), 250 kHz (Ver. F), 400 kHz (Ver. H) Latch Protection Delay Time ******************************* Typ. 4 ms (Ver. A/C/E/G) Ceramic Capacitors Recommended for Input and Output. Stand-by Current ********************************************** Typ. 0 A Packages ******************************************************* SOT-23-6W, DFN(PLP)2020-8, HSOP-8E 1 R1245x No. EA-269-170720 APPLICATIONS * * * * Digital Home Appliances: Digital TVs, DVD Players Office Equipment: Printers, Faxes 5V PSU or 2-cell or more Li-ion Battery Powered Communication Equipment, Cameras, VCRs, Camcorders High Voltage Battery-powered Equipment SELECTION GUIDE In the R1245x, the package, type of short protection (Latch or Fold-back), and the oscillator frequency can be selected with the user's request. Selection Guide Product code Package Quantity per Reel Pb Free Halogen Free R1245S003-E2-FE HSOP-8E 1,000 pcs Yes Yes DFN(PLP)2020-8 5,000 pcs Yes Yes SOT-23-6W 3,000 pcs Yes Yes R1245K003-TR R1245N001-TR-FE : Designation of the oscillator frequency and the protection function option. Oscillator Latch Fold-back Symbol Frequency Protection Protection A 330 kHz B 330 kHz C 500 kHz D 500 kHz E 1000 kHz F 1000 kHz G 2400 kHz H 2400 kHz 2 R1245x No. EA-269-170720 BLOCK DIAGRAM VIN Thermal Shutdown UVLO CE Regulator Regulator 5V BST Shutdown SETPULSE Oscillator *1 FB MAXDUTY S D Lx R Reference + + Soft Start Circuit(1ms) 0.8V Limit Latch Circuit (4ms) *1 Current Slope Circui t Peak Current Limit Circuit GND R1245x Block Diagram *1 Version A B C D E F G H Oscillator Frequency 330 kHz 330 kHz 500 kHz 500 kHz 1000 kHz 1000 kHz 2400 kHz 2400 kHz Short Protection Type 330 kHz 330 kHz 500 kHz 500 kHz 1000 kHz 1000 kHz 2400 kHz 2400 kHz 3 R1245x No. EA-269-170720 PIN DESCRIPTIONS Top View Bottom View 8 7 6 5 5 6 7 8 1 2 3 4 4 3 2 1 DFN(PLP)2020-8 Pin Configuration Top View 8 1 7 2 6 3 Top View Bottom View 5 4 5 4 6 3 7 2 HSOP-8E Pin Configuration 8 6 5 4 1 2 3 1 SOT-23-6W Pin Configuration * Connect the backside heat radiation tub to GND or same as GND level (recommendation). The tub is connected to the GND pin. 4 R1245x No. EA-269-170720 R1245S Pin Description Pin No. Symbol Description 1 Lx Lx Switching Pin 2 VIN Power Supply Pin 3 CE Chip Enable Pin, Active with "H" 4 TEST TEST pin (must be open for user side.) 5 GND Ground Pin 6 FB Feedback Pin 7 NC No connection 8 BST Bootstrap Pin * Connect the backside heat radiation tub to GND or same as GND level (recommendation). The tub is connected to the GND pin. R1245K Pin Description Pin No. Symbol Description 1 Lx Lx Switching Pin 2 VIN Power Supply Pin 3 VIN Power Supply Pin 4 CE Chip Enable Pin, Active with "H" 5 GND 6 FB 7 TEST 8 BST Ground Pin Feedback Pin Test Pin (must be open for user side.) Bootstrap Pin * Connect the backside heat radiation tub to GND or same as GND level (recommendation). The tub is connected to the GND pin. R1245N Pin Description Pin No. Symbol Description 1 BST Bootstrap Pin 2 GND Ground Pin 3 FB Feedback Pin 4 CE Chip Enable Pin, Active with "H" 5 VIN Power Supply Pin 6 Lx Lx Switching Pin 5 R1245x No. EA-269-170720 INTERNAL EQUIVALENT CIRCUIT FOR EACH PIN <BST pin> <Lx pin> Regulator VIN BST LX LX <FB pin> Regulator <TEST pin> Regulator 6 VIN CE FB TEST <CE pin> R1245x No. EA-269-170720 ABSOLUTE MAXMUM RATINGS (GND = 0 V) Absolute Maximum Ratings Symbol VIN Item Rating Unit -0.3 V to 32 V V VLX -0.3 V to VLX + 6 V V Input Voltage VBST BST Pin Voltage VLX Lx Pin Voltage -0.3 V to VIN + 0.3 V VCE CE Pin Input Voltage -0.3 V to VIN + 0.3 V VFB Feedback Pin Voltage -0.3 V to 6 V V PD Power Dissipation* HSOP-8E Ultra High Wattage Land Pattern 2900 DFN(PLP)2020-8 Standard Land Pattern 880 SOT-23-6W Standard Land Pattern 430 mW Tj Junction Temperature Range -40 to 125 C Tstg Storage Temperature Range -55 to 125 C * Refer to POWER DISSIPATION for detailed information. ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the lifetime and safety for both device and system using the device in the field. The functional operation at or over these absolute maximum ratings is not assured. RECOMMENDED OPERATING CONDITIONS Recommended Operating Conditions Symbol Item Rating VIN Operating Input Voltage Ta Operating Temperature Range Unit 4.5 to 30 V -40 to 105 C RECOMMENDED OPERATING CONDITIONS All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions. 7 R1245x No. EA-269-170720 ELECTRICAL CHARACTERISTICS (Unless otherwise noted, VIN = 12 V, Ta = 25C) Electrical Characteristics Symbol Item Conditions Min. Max. 1.0 VUVLO2 -0.1 4.2 0.808 IIN Consumption Current VIN = 30 V, VFB = 1.0 V VUVLO1 UVLO Detect Voltage Specified VIN falling edge 3.6 VUVLO2 UVLO Released Voltage Specified rising edge 3.8 -0.2 4.0 0.792 0.800 VFB VFB/Ta fosc fFLB VFB Voltage Tolerance VFB Voltage Temperature Coefficient Oscillator Frequency Fold back Frequency 100 -40C Ta 105C Ver. A/B 300 Ver. C/D 450 500 550 Ver. E/F 900 1000 1100 Ver. G/H 2200 2400 2600 VF B < 0.56 V Maxduty tstart tDLY RLXH ILXHOFF ILIMLXH VCEL VCEH Oscillator Maximum Duty Cycle Soft-start Time Delay Time for Latch Protection Lx High Side Switch ON Resistance Lx High Side Switch Leakage Current Lx High Side Switch Limited Current CE "L" Input Voltage 330 Ver. B/D 170 Ver. F 250 Unit mA V V V ppm/ C 360 kHz kHz 400 Ver. H Ver. A/B/C/D 92 Ver. E/F 88 Ver. G/H 76 % VFB = 0.72 V 1 ms Ver. A/C/E/G 4 ms 0.35 VBST - VLX = 4.5 V VIN = 30 V, VCE = 0 V VBST - VLX = 4.5 V 1.5 0 5 A 2.0 2.7 A 0.3 V VIN = 30 V 1.6 V CE "H" Input Voltage VIN = 30 V IFB VFB Input Current VIN = 30.0 V, VFB = 1.0 V -1.0 1.0 A ICEL CE "L" Input Current VIN = 30 V, VCE = 0 V -1.0 1.0 A ICEH CE "H" Input Current VIN = 30 V, VCE = 30 V -1.0 1.0 A TTSD Istandby 8 Typ. 0.5 VUVLO2 Thermal Shutdown Detect Temperature Standby Current Hysteresis 30C VIN = 30 V 160 0 C 5 A R1245x No. EA-269-170720 OPERATING DESCRIPTIONS OPERATION OF THE BUCK CONVERTER AND THE OUTPUT CURRENT The DC/DC converter charges energy in the inductor when the switch turns on, and discharges the energy from the inductor when the switch turns off and controls with less energy loss, so that a lower output voltage than the input voltage is obtained. Refer to the following figures. ILmax IL ILmin i1 VIN Switch L Diode i2 topen VOUT COUT GND ton toff t=1/fosc Basic Circuit Current flowing through the Inductor Step 1: The switch turns on and current IL (= i1) flows, and energy is charged into COUT. At this moment, IL increases from ILmin (= 0) to reach ILmax in proportion to the on-time period (ton) of the switch. Step 2: When the switch turns off, the diode turns on in order to maintain IL at ILmax, and current IL (= i2) flows. Step 3: IL (= i2) decreases gradually and reaches IL = ILmin = 0 after a time period of topen, and the diode turns off. This case is called as discontinuous mode. If the output current becomes large, next switching cycle starts before IL becomes 0 and the diode turns off. In this case, IL value increases from ILmin (> 0), and this case is called continuous mode. In the case of PWM control system, the output voltage is maintained by controlling the on-time period (ton), with the oscillator frequency (fosc) being maintained constant. 9 R1245x No. EA-269-170720 APPLICATION INFORMATION TYPICAL APPLICATION CIRCUIT R1245x00xA/B Typical Application Circuit, 330 kHz, VOUT = 1.2 V, VIN = 24 V R1245x00xC/D Typical Application Circuit, 500 kHz, VOUT = 3.3 V, VIN = 24 V * TEST pin must be open. 10 R1245x No. EA-269-170720 R1245x00xE/F Typical Application Circuit, 1000 kHz, VOUT = 3.3 V VIN = 12 V R1245x00xG/H Typical Application Circuit, 2400 kHz, VOUT = 5. 0 V, VIN = 12 V * TEST pin must be open. 11 R1245x No. EA-269-170720 OUTPUT CURRENT AND SELECTION OF EXTERNAL COMPONENTS The relation between the output current and external components is as follows: When the switch of Lx turns on: (Wherein, the peak to peak value of the ripple current is described as IRP, the ON resistance of the switch is described as RONH, and the diode forward voltage as VF, and the DC resistance of the inductor is described as RL, and on time of the switch is described as ton) VIN = VOUT + (RONH + RL) x IOUT + L x IRP / ton ***************************************************************** Equation 1 When the switch turns off (the diode turns on) as toff: L x IRP / toff = VF + VOUT + RL x IOUT ****************************************************************************** Equation 2 Put Equation 2 to Equation 1 and solve for ON duty of the switch, ton / (toff + ton) = DON, DON = (VOUT + VF + RL x IOUT) / (VIN + VF - RONH x IOUT)****************************************************** Equation 3 Ripple Current is as follows: IRP = (VIN - VOUT - RONH x IOUT - RL x IOUT) x DON / fosc / L ************************************************ Equation 4 wherein, peak current that flows through L, and the peak current ILmax is as follows: ILmax = IOUT + IRP / 2 ************************************************************************************************ Equation 5 As for the valley current ILmin, ILmin = IOUT - IRP / 2 ************************************************************************************************** Equation 6 If ILmin < 0, the step-down DC/DC converter operation becomes current discontinuous mode. Therefore the current condition of the current discontinuous mode, the next formula is true. IOUT < IRP / 2 ************************************************************************************************************ Equation 7 Consider ILmax and ILmin, conditions of input and output and select external components. *The above explanation is based on the calculation in an ideal case in continuous mode. 12 R1245x No. EA-269-170720 Ripple Current and Lx Current Limit The ripple current of the inductor may change according to the various reasons. In the R1245x, as an Lx current limit, Lx peak current limit is used. Therefore the upper limit of the inductor current is fixed. The peak current limit is not the average current of the inductor (output current). If the ripple current is large, peak current becomes also large. The characteristic is used for the fold-back current limit of version B/D/F/H. In other words, the peak current limit is maintained and the switching frequency is reduced, as a result, the average current of the inductor is reduced. To release this condition, at 170 kHz for version B/D, at 250 kHz for version F, at 400 kHz for version H must not be beyond the peak current limit. In the fig.1, the sequence of the Lx current limit function is described. VOUT VOUT Limit Latch (R1245x00x A/C/E/G) open 4msec short 4msec t shutdown IOUT shutdown restart (CE=0"H") VOUT VOUT Fold Back FB<0.56V FB<0.56V (R1245x00x B/D/F/H) t short IOUT open Fig.1 LX Limit function sequence Latch Protection Function for Version A/C/E/G The latch function works after detecting current limit and if the output voltage becomes low for a certain time, the output is latched off. Refer to the TECHNICAL NOTES. Fold-back Protection Function for Version B/D/F/H If FB voltage becomes lower than approximately 0.56 V, the fold-back protection function limits the oscillator frequency to typically 170 kHz for version B/D, typically 250 kHz fir version F, typically 400 kHz for version H. By reducing frequency, the ripple current increases. The R1245x has the peak current limit function, therefore as in the equation 8, the Lx average current decreases by the increase of the ripple current. IOUT = ILmax + IRP / 2.....................................................................................................Equation 8 If FB voltage becomes less than 0.56 V, the oscillator frequency is reduced. At heavy load, if the R1245x becomes into the fold-back protection mode, the situation may not be released by increase the ripple current. In terms of other notes on this protection function, refer to the TECHNICAL NOTES. 13 R1245x No. EA-269-170720 MAXIMUM OUTPUT CURRENT The output current of the R1245x is limit by the power dissipation PD of the package and the maximum specification 1.2 A. The loss of the IC includes the switching loss, and it is difficult to estimate. To estimate the maximum output, using the efficiency data is one method. By using the efficiency data, the loss including the external components can be calculated with the equation, (100 / efficiency (%) - 1) x (VOUT (V) x IOUT (A)). From this equation, by reducing the loss of external components, the loss of the IC can be estimated. The main loss of the external components is composed by the rectifier diode and DCR of the inductor. Supposed that the forward voltage of the diode is described as VF, the loss of the diode can be described as follows: (VIN (V) - RON () x IOUT (A) - VOUT (V) - VF (V))) / VIN (V) x VF (V) x IOUT (A) The loss by the DCR of the inductor can be calculated by the formula DCR () x IOUT2 (A). Thus, The loss of the IC = (100 / efficiency (%) - 1) x (VOUT (V) x IOUT (A) - (VIN (V) - RON () x IOUT (A) - VOUT (V) -VF (V)) / VIN (V) x VF (V) x IOUT (A) - DCR () x IOUT2 (A) The efficiency of the R1245x at Ta = 25C, VIN = 12 V, VOUT = 3.3 V, IOUT = 600 mA is approximately 89.5% for version A/B (Oscillator frequency: 330 kHz). Supposed that the On resistance of the internal driver is 0.35 , the DCR of the inductor is 65 m, the VF of the rectifier diode is 0.3 V and applied to the formula above, The loss of the IC = (100% / 89.5% - 1) x (3.3 V x 0.6 A) - (12 V - 0.35 x 0.6 A - 3.3 V - 0.3 V) / 12 V x 0.3 V x 0.6 A - 0.065 x 0.62 A = 86 mW The power dissipation PD of the package is specified at Ta = 25C based on the Tjmax = 125C. Thus the thermal resistance of the package ja = (Tjmax (C) - Ta(C)) / PD (W), therefore the thermal resistance of the each available package is as follows: HSOP-8E: (125C - 25C) /2.9 W = 34.5C/W DFN(PLP)2020-8: (125C - 25C) / 0.88 W = 114C/W SOT-23-6W: (125C - 25C) / 0.43 W = 233C/W Due to the loss of the IC is 86mW for this example, therefore Tj increase of the each package is as follows: HSOP-8E: 34.5C/W x 86 mW = 2.96C DFN(PLP)2020-8: 114C/W x 86 mW = 9.80C SOT-23-6W: 233C/W x 86 mW = 20.0C For all the packages, even if the ambient temperature is at 105C, Tj can be suppressed less than 125C. By the increase of the temperature, on resistance and switching loss increases, therefore, temperature margin is not enough, measure the efficiency at the actual maximum temperature and recalculation is necessary. At the same condition, if the preset frequency is 2400 kHz, the efficiency will be down to approximately 81%. The result of the loss calculation is 310 mW, therefore the Tj increase of each package is, HSOP-8E: 34.5C/W x 310 mW = 11C DFN(PLP)2020-8: 114C/W x 310 mW = 35C SOT-23-6W: 233C/W x 310 mW = 72C 14 R1245x No. EA-269-170720 HSOP-8E can be used at the ambient temperature 105C, DFN(PLP)2020-8 can be used at the ambient temperature up to 90C, SOT-23-6W can be used at the ambient temperature up to 53C. Note that the result is different by the frequency. The next graphs are the output current and estimated ambient temperature limit. Maximum Output Current VIN = 12 V, VOUT = 3.3 V, fosc = 330 kHz -40C 105C 1400 1200 IOUT[mA] 1000 800 SOT-23-6W DFN2020-8 HSOP-8E 600 400 200 0 -50 0 50 100 150 Ta[C] Maximum Output Current VIN = 12 V, VOUT = 3.3 V, fosc = 2400 kHz -40C 105C 1400 1200 IOUT[mA] 1000 SOT-23-6W DFN2020-8 HSOP-8E 800 600 400 200 0 -50 0 50 100 150 Ta[C] 15 R1245x No. EA-269-170720 TECHNICAL NOTES * External components must be connected as close as possible to the ICs and make wiring as short as possible. Especially, the capacitor connected in between VIN pin and GND pin must be wiring the shortest. If their impedance is high, internal voltage of the IC may shift by the switching current, and the operating may be unstable. Make the power supply and GND lines sufficient. In the wiring of the power supply, GND, LX, VOUT and the inductor, large current by switching may flow. To avoid the bad influence, the wiring between the resistance, "RUP" for setting the output voltage and loading, and the wiring between the inductor and loading must be separated. * The ceramic capacitors have low ESR (Equivalent Series Resistance) and recommended for the ICs. The recommendation of CIN capacitor between VIN and GND is 10 F or more for A/B/C/D version, 4.7 F or more for E/F version, and 2.2 F or more for G/H version. Verify the bias dependence and the temperature characteristics of the ceramic capacitors. Recommendation conditions are written based on the case which the recommendation parts are used with the R1245x. * The R1245x is designed with the recommendation inductance value and ceramic capacitor value and phase compensation has been made. If the inductance value is large, due to the lack of current sensing amount of the current mode, unstable operation may result. On the contrary, if the inductance value is small, the current sensing amount may increase too much, low frequency oscillation may occur when the on duty ratio is beyond 50%. Not only that, if the inductance value is small, according to the increase of the load current, the peak current of the switching may increase, as a result, the current may reach the current limit value and the current limit may work. * As for the diode, use the Schottky diode with small capacitance between terminals. The reference characteristic of the capacitance between terminals is around 100 pF or less at 10 V. If the capacitance between terminals is large, excess switching current may flow and the operation of the IC may be unstable. If the capacitance between terminals of the Scottky diode is beyond 100 pF at 10 V or unknown, verify the load regulation, line regulation, and the load transient response. * Output voltage can be set by adjustment of the values of R1 and R2. The equation of setting the output voltage is VOUT = VFB x (R1 + R2) / R2. If the values of R1 and R2 are large, the impedance of FB pin increases, and pickup the noise may result. The recommendation value range of R2 is approximately between 1.0 k to 16 k. If the operation may be unstable, reduce the impedance of FB pin. * For the CE pin, as an ESD protection element, a diode to VIN pin is formed internal of the IC. If CE pin voltage may become higher than VIN pin voltage, to prevent flowing large current from CE pin to VIN pin, connect 10 k or more resistor between CE and VIN pin. * Connect the backside heat radiation tub of the DFN(PLP)2020-9/HSOP-8E to the GND. As for multi-layered boards, to make better power dissipation, putting some thermal via on the thermal pad in the land pattern and radiation of the heat to another layer is effective. * After the soft-start operation, the latch function is enabled for version A/C/E/G. The latch protection starts the internal counter when the internal current limit protection circuit detects the current limit. When the internal counter counts up to the latch timer limit, typically 4 ms, the output is latched off. To reset the latch function, make the CE pin "L", or make VIN pin voltage lower than UVLO detector threshold. Then in the case that the output voltage or FB voltage becomes setting voltage within the latch timer preset time, counter is initialized. If the slew rate of the power supply is too slow and after the soft-start time, the output voltage does not reach the set output voltage even if the latch timer preset time is over, the latch function may work unexpectedly. 16 R1245x No. EA-269-170720 * After the soft-start operation, fold-back protection function is enabled for version B/D/F/H. The fold-back function will limit the oscillator frequency if the FB pin voltage becomes lower than typically 0.56 V. For B/D version, the oscillator frequency will be reduced typically into 170 kHz, for F version, into 250 kHz, for H version, into 400 kHz. * If the slew rate of the power supply is too slow, and even after the soft-start time, the output voltage is still less than 70% of the set output voltage, or FB pin voltage is less than typically 0.56 V, then this function may work unexpectedly. * The performance of power circuit using this IC largely depends on external components. Selection of external components is very important, especially, do not exceed each rating value (voltage/current/power). Table 1. Recommended Values for Each Output Voltage R1245x00xA/B: 330 kHz VOUT (V) 0.8 to 1.2 R1 (RUP) (k) R2 (RBOT) (k) CSPD (pF) COUT (F) L (H) 16 open 47 4.7 R1245x00xC/D: 500 kHz VOUT (V) 0.8 to 1.2 R1 (RUP) (k) R2 (RBOT) (k) CSPD (pF) COUT (F) L (H) 16 open 100 4.7 R1245x00xE/F: 1000 kHz VOUT (V) 0.8 to 1.0 1.2 to 1.5 16 100 100 4.7 1.0 to 1.2 R1 (RUP) (k) R2 (RBOT) (k) CSPD (pF) COUT (F) L (H) 16 open 100 2.2 R1245x00xG/H: 2400 kHz VOUT (V) R1 (RUP) (k) R2 (RBOT) (k) CSPD (pF) COUT (F) L (H) 16 100 100 2.2 1.2 to 1.8 16 100 10 1.0 1.2 to 2.5 2.5 to 5.0 5.0 = (VOUT / 0.8 - 1) x R2 12 1.20 470 2200 47 22 10 15 1.5 to 2.0 2.0 to 5.0 1.20 1000 22 33 5.0 to 12.0 12.0 1.2 1000 22 15 1.2 470 22 15 2.5 to 5.0 5.0 1.2 470 10 4.7 1.2 470 10 10 = (VOUT / 0.8 - 1) x R2 16 1.2 100 1000 22 22 10 10 1.2 to 1.5 1.5 to 2.5 = (VOUT / 0.8 - 1) x R2 16 16 100 100 47 22 2.2 2.2 1.8 to 2.5 2.5 to 5.0 = (VOUT / 0.8 - 1) x R2 12 1.2 100 470 10 4.7 1.5 2.2 5.0 1.2 470 4.7 4.7 17 R1245x No. EA-269-170720 *1 Divider Resisters Values and Possible Setting Range of Input/ Output VOUT [V] 0.8 1 1.2 1.5 1.8 2 2.5 3.3 5 R2 (RBOT) [k] 0 open 0 16 4 16 8 16 6 12 10.5 12 14 16 20 16 15 12 24 16 1.8 1.2 34 16 25.5 12 2.55 1.2 3.75 6.3 Input Voltage Range [V] Ver. A/B Ver. C/D Ver. E/F Ver. G/H 4.5 to 20 4.5 to 13.5 4.5 to 7 - 4.5 to 25.5 4.5 to 17 4.5 to 8.5 - 4.5 to 30 4.5 to 20 4.5 to 10 - 4.5 to 30 4.5 to 25 4.5 to 12.5 4.5 to 5.5 4.5 to 30 4.5 to 30 4.5 to 15 4.5 to 6.5 4.5 to 30 4.5 to 30 4.5 to 17 4.5 to 7 4.5 to 30 4.5 to 30 4.5 to 21 4.5 to 9 1.2 4.5 to 30 4.5 to 30 4.5 to 27.5 4.5 to 12 1.2 5.5 to 30 5.5 to 30 6 to 30 7 to 18.5 6.5 to 30 7 to 30 8 to 20 6 7.8 1.2 6.5 to 30 9 12.3 1.2 10 to 30 10 to 30 11 to 30 12 to 30 12 16.8 1.2 13 to 30 13 to 30 14 to 30 16 to 30 15 21.3 34.8 1.2 16.5 to 30 16.5 to 30 17 to 30 20 to 30 1.2 26.5 to 30 26.5 to 30 27.5 to 30 30 24 18 R1 (RUP) [k] R1245x No. EA-269-170720 Table 2. Recommended External Components Examples (Considering All the Range) Symbol Condition Value CIN 50 V/ X5R 10 F UMK325BJ106MM-P TAIYO YUDEN 50 V/ X5R 10 F CGA6P3X7S1H106K TDK 50 V/ X7R 4.7 F GRM31CR71H475KA12L Murata 50 V/ X7R 2.2 F GRM31CR71H225KA88L Murata COUT 50 V/ X5R 50 V/ X5R 50 V/ X7R 25 V/ X7R 10 V/ X7R 16 V/ B 10 V/ X7R 10 F 10 F 10 F 10 F 22 F 47 F 47 F TAIYO YUDEN TDK Nippon Chemi-Con Murata Murata Murata Murata CBST 16 V/ X7R 0.47 F UMK325BJ106MM-P CGA6P3X7S1H106K KTS500B106M55N0T00 GRM31CR71E106K GRM31CR71A226M GRM32EB31C476KE15 GRM32ER71A476KE15 NOTE: The value of COUT depends on the setting output voltage. EMK212B7474KD-T L 1.8 A 1.65 A 1.7 A 10 H 4.7 H 4.7 H SLF6045T-100M1R6-3PF SLF7045T-4R7M2R0-PF NR4018T-4R7M2R0-PF TDK TDK TDK 2.4 A 4.7 H NR6020T4R7N TAIYO YUDEN 1.9 A 10 H NR6028T100M TAIYO YUDEN 2.3 A 15 H NR6045T150M TAIYO YUDEN 1.9 A 22 H NR6045T220M TAIYO YUDEN 1.9 A 33 H NR8040T330M TAIYO YUDEN 1.7 A 2.2 H VLCF4020T-2R2N1R7 TDK 1.65 A 2.2 H NR4012T2R2M TAIYO YUDEN 1.8 A 1.5 H NR3015T1R5N TAIYO YUDEN D RCE Parts Name MFR TAIYO YUDEN 1.8 A NR4010T1R0N TAIYO YUDEN 1.0 H 30 V/ 2.0 A 0.37 V CMS06 TOSHIBA 40 V/ 2.0 A 0.55 V CMS11 TOSHIBA An up diode is formed between the CE pin and the VIN pin as an ESD protection element. If the CE pin may become higher than the voltage of the VIN pin, connect the 10 k resistance between the CE pin and VIN pin, to prevent a large current from flowing into the VIN pin from the CE pin. 19 R1245x No. EA-269-170720 THE NOTE OF LAYOUT PATTERN 1. The wire of Power line (VIN, GND) should be broad to minimize the parasitic inductance. The Bypass capacitor (CIN) must be connected as close as possible in between VIN - GND. 2. The wire between Lx pin and the inductor as short as possible to minimize the parasitic inductance. This evaluation board is designed for the product evaluation board. Therefore large inductors or diodes can be set and the large space of Lx area has been secured. The evaluation board, R1245K003x (2400 kHz) with the reduced mounting area including external components, is available due to the small package of R1245K003G/H and the low recommended constant numbers including inductors. 3. The ripple current flows through the output capacitor. If the GND side of the output capacitor is connected very close to GND pin of the IC, the noise might have a bad impact on the IC. Therefore, the GND side of the output capacitor is better to connect to the outside of the GND of the CIN, or connect to the GND plain layer. 4. Rup, Rbot, Cspd, and Rspd should be mounted on the position as close as possible to the FB pin, and away from the inductor and BST pin. 5. The feed-back must be made as close as possible from the Output capacitor (COUT). 20 R1245x No. EA-269-170720 PCB LAYOUT R1245N001x TOP VIEW BOTTOM VIEW TOP VIEW BOTTOM VIEW R1245S003x 21 R1245x No. EA-269-170720 R1245K003x TOP VIEW BOTTOM VIEW R1245K003x (2400 kHz) TOP VIEW 22 BOTTOM VIEW R1245x No. EA-269-170720 TYPICAL CHARACTERISTICS Note: Typical Characteristics are intended to be used as reference data; they are not guaranteed. 1) FB voltage vs. Temperature 2) Driver On resistance vs. Temperature R1245x00xx R1245x00xx (VIN=12V) Driver On Resistance () FB Voltage (V) (VIN=12V) 0.808 0.806 0.804 0.802 0.8 0.798 0.796 0.794 0.792 -50 -25 0 25 50 Ta () 500 450 400 350 300 250 200 75 100 125 -50 -25 0 25 50 Ta () 75 100 125 3) Oscillator frequency vs. Temperature R1245x00xA/R1245x00xB (VIN=12V) R1245x00xC/R1245x00xD (VIN=12V) 550 350 Frequency (kHz) Frequency (kHz) 360 340 330 320 310 300 500 475 450 -50 -25 0 25 50 Ta () 75 100 125 -50 R1245x00xE/R1245x00xF (VIN=12V) -25 0 25 50 Ta () 75 100 125 R1245x00xG/R1245x00xH (VIN=12V) 2640 1100 2560 1050 Frequency (kHz) Frequency (kHz) 525 1000 950 900 2480 2400 2320 2240 2160 -50 -25 0 25 50 Ta () 75 100 125 -50 -25 0 25 50 Ta () 75 100 125 23 R1245x No. EA-269-170720 4) Maximum duty cycle vs. Temperature R1245x00xC/R1245x00xD (VIN=12V) 99 99 98 98 97 97 Maxduty (%) Maxduty (%) R1245x00xA/R1245x00xB (VIN=12V) 96 95 94 93 92 96 95 94 93 92 -50 -25 0 25 50 Ta () 75 100 125 -50 -25 96 95 86 85 94 93 84 83 92 91 25 50 Ta () 75 100 125 R1245x00xG/R1245x00xH (VIN=12V) Maxduty (%) Maxduty (%) R1245x00xE/R1245x00xF (VIN=12V) 0 90 89 82 81 80 79 -50 -25 0 25 50 Ta () 75 100 125 -50 -25 0 25 50 Ta () 75 100 125 5) Fold back frequency vs. Temperature R1245x00xB R1245x00xD 240 220 200 180 160 140 120 100 80 -50 -25 24 (VIN=12V) Fold back Frequency (kHz) Fold back Frequency (kHz) (VIN=12V) 0 25 50 Ta () 75 100 125 240 220 200 180 160 140 120 100 80 -50 -25 0 25 50 Ta () 75 100 125 R1245x No. EA-269-170720 R1245x00xF R1245x00xH (VIN=12V) (VIN=12V) Fold back Frequency (kHz) Fold back Frequency (kHz) 420 370 320 270 220 170 120 -50 -25 0 25 50 Ta () 720 620 520 420 320 220 120 75 100 125 -50 -25 0 25 50 Ta () 75 100 125 6) High side switch current limit vs. Temperature R1245x00xx (VIN=12V) 2.7 2.5 LX Current Limit (A) 2.3 2.1 1.9 1.7 1.5 -50 -25 0 25 50 Ta () 75 100 125 7) UVLO detector threshold vs. Temperature 8) UVLO released voltage vs. Temperature R1245x00xx R1245x00xx 4.2 UVLO Released Voltage (V) UVLO Detector Threshold (V) 4.1 4 3.9 3.8 3.7 3.6 -50 -25 0 25 50 Ta () 75 100 125 4.1 4 3.9 3.8 -50 -25 0 25 50 Ta () 75 100 125 25 R1245x No. EA-269-170720 9) Soft-start time vs. Temperature 10) Timer latch delay vs. Temperature R1245x00xx R1245x00xx (VIN=6V) (VIN=12V) 6 1.6 Delay Time For Latch Protection (ms) Soft Start Time (ms) 1.8 1.4 1.2 1 0.8 0.6 0.4 -50 -25 0 25 50 Ta () 75 5 4 3 2 1 -50 100 125 11) CE "H" Input voltage vs. Temperature -25 0 25 50 Ta () 75 12) CE "L" Input voltage vs. Temperature R1245x00xx R1245x00xx (VIN=12V) (VIN=12V) 2.5 2.5 CE "L" Voltage (V) CE "H" Voltage (V) 100 125 2 1.5 1 0.5 -50 -25 0 25 50 Ta () 75 2 1.5 1 0.5 100 125 -50 -25 0 25 50 Ta () 75 100 125 13) Soft-start waveform R1245x00xA/R1245x00xB R1245x00xA/R1245x00xB VOUT=3.3V , VIN=12V , IOUT=0mA , Ta=25C VOUT=3.3V , VIN=12V , IOUT=600mA , Ta=25C VCE VCE (5V/div) (5V/div) VOUT VOUT (1V/div) (1V/div) ILX ILX (200mA/div) (200mA/div) VLX VLX (10V/div) (10V/div) 200s/div 26 200s/div R1245x No. EA-269-170720 14) Switching operation waveform R1245x00xA/R1245x00xB VOUT=3.3V , VIN=12V , IOUT=0mA , Ta=25C R1245x00xA/R1245x00xB VOUT=3.3V , VIN=12V , IOUT=600mA , Ta=25C V OUT (AC) (20mV/div) ILX (200mA/div) V LX (5V/div) 2s/div R1245x00xG/R1245x00xH R1245x00xG/R1245x00xH VOUT=3.3V , VIN=12V , IOUT=20mA , Ta=25C VOUT=3.3V , VIN=12V , IOUT=600mA , Ta=25C 15) Loaf transient response waveform R1245x00xA/R1245x00xB VOUT=0.8V , VIN=12V , IOUT=6001200mA , Ta=25C R1245x00XA/R1245x00xB VOUT=3.3V , VIN=12V , IOUT=6001200mA , Ta=25C VOUT (100mV/div) IOUT (500mA/div) 100s/div 27 R1245x No. EA-269-170720 R1245x00xG/R1245x00xH R1245x00xG/R1245x00xH VOUT=1.5V , VIN=4.5V , IOUT=6001200mA , Ta=25C 16) Limit latch operation waveform VOUT=3.3V , VIN=12V , IOUT=6001200mA , Ta=25C 17) Released waveform from limit latch R1245x00xA R1245x00xA VOUT=3.3V , VIN=12V , ROUT=5.50.05, Ta=25C VOUT=3.3V , VIN=12V , ROUT=5.50.055.5 , Ta=25C 18) Fold back operation waveform 19) Released waveform from fold back R1245x00xB R1245x00xB VOUT=3.3V , VIN=12V , ROUT=5.50.05 VOUT=3.3V , VIN=12V , ROUT=5.50.055.5 Ta=25C Ta=25C V OUT V OUT (2V/div) (2V/div) V LX V LX (10V/div) (10V/div) ILX ILX (1A/div) (1A/div) 20s/div 28 20s/div R1245x No. EA-269-170720 20) Switching waveform at fold back operation R1245x00xB VOUT=3.3V , VIN=12V , ROUT=0.05, Ta=25C V OUT (2V/div) V LX (10V/div) ILX (1A/div) 2s/div 21) Output current vs. Efficiency (Version A/B) 80 60 VIN = 4.5V VIN = 6.0V VIN = 18V 100 80 Efficiency (%) Efficiency (%) 100 R1245x00xA/R1245x00xB VOUT=0.8V (Ta=25) 40 20 0 100 Efficiency (%) 80 0.1 1 10 IOUT (mA) 100 1000 10000 40 20 0.01 R1245x00xA/R1245x00xB VOUT=5.0V (Ta=25) VIN = 12V VIN = 24V VIN = 30V 100 80 60 40 20 0 0.01 VIN = 4.5 V VIN = 12 V VIN = 24 V 0 Efficiency (%) 0.01 60 R1245x00xA/R1245x00xB VOUT=3.3V (Ta=25) 60 0.1 1 10 IOUT (mA) 100 1000 10000 R1245x00xA/R1245x00xB VOUT=12V (Ta=25) VIN = 18V VIN = 24V VIN = 30V 40 20 0 0.1 1 IOUT 10 (mA) 100 1000 10000 0.01 0.1 1 IOUT 10 (mA) 100 1000 10000 29 R1245x No. EA-269-170720 Efficiency (%) 80 100 VIN = 24V 80 VIN = 30V Efficiency (%) 100 R1245x00xA/R1245x00xB VOUT=15V (Ta=25) 60 40 20 VIN=30V 60 40 20 0 0.01 R1245x00xA/R1245x00xB VOUT=24V (Ta=25) 0 0.1 1 IOUT 10 (mA) 100 1000 10000 0.01 0.1 1 10 IOUT (mA) 100 1000 10000 22) Output Current vs. Efficiency (Version C/D) 80 60 VIN = 4.5V VIN = 6.0V VIN = 12V 80 60 40 0.1 1 IOUT 60 10 (mA) 100 R1245x00xC/R1245x00xD VOUT=5.0V (Ta=25) VIN = 12V VIN = 24V VIN = 30V 100 60 0.1 1 10 IOUT (mA) 100 1000 10000 R1245x00xC/R1245x00xD VOUT=12V (Ta=25) VIN = 18V VIN = 24V VIN = 30V 40 20 20 0 30 0.01 80 40 0.01 0 1000 10000 Efficiency (%) Efficiency (%) 80 VIN = 4.5V VIN = 12V VIN = 24V 20 0 100 R1245x00xC/R1245x00xD VOUT=3.3V (Ta=25) 40 20 0.01 100 Efficiency (%) Efficiency (%) 100 R1245x00xC/R1245x00xD VOUT=0.8V (Ta=25) 0 0.1 1 10 IOUT (mA) 100 1000 10000 0.01 0.1 1 10 IOUT (mA) 100 1000 10000 R1245x No. EA-269-170720 Efficiency (%) 80 60 VIN = 24V 80 VIN = 30V VIN = 30V 60 40 40 20 20 0 0.01 R1245x00xC/R1245x00xD VOUT=24V (Ta=25) 100 Efficiency (%) 100 R1245x00xC/R1245x00xD VOUT=15V (Ta=25) 0 0.1 1 10 IOUT (mA) 100 1000 10000 0.01 0.1 1 10 IOUT (mA) 100 1000 10000 23) Output current vs. Efficiency (Version E/F) Efficiency (%) 80 60 VIN = 4.5V 100 80 VIN = 6.0V Efficiency (%) 100 R1245x00xE/R1245x00xF VOUT=0.8V (Ta=25) 60 20 20 0 0 Efficiency (%) 80 60 0.1 1 10 IOUT (mA) 100 1000 R1245x00xE/R1245x00xF VOUT=5.0V (Ta=25) VIN = 12V VIN = 24V VIN = 30V 100 80 60 40 0.1 1 10 IOUT (mA) 100 1000 10000 R1245x00xE/R1245x00xF VOUT=12V (Ta=25) VIN = 24V VIN = 30V 40 20 20 0 0.01 0.01 10000 Efficiency (%) 100 VIN = 4.5V VIN = 12V VIN = 24V 40 40 0.01 R1245x00xE/R1245x00xF VOUT=3.3V (Ta=25) 0 0.1 1 10 IOUT (mA) 100 1000 10000 0.01 0.1 1 10 IOUT (mA) 100 1000 10000 31 R1245x No. EA-269-170720 R1245x00xE/R1245x00xF VOUT=15V (Ta=25) 100 VIN = 24V Efficiency (%) 80 100 80 VIN = 30V Efficiency (%) VIN = 30V 60 R1245x00xE/R1245x00xF VOUT=24V (Ta=25) 60 40 40 20 20 0 0 0.01 0.1 1 10 IOUT (mA) 100 1000 10000 0.01 0.1 1 10 IOUT (mA) 100 1000 10000 24) Output current vs. Efficiency (Version G/H) R1245x00xG/R1245x00xH VOUT=1.5V (Ta=25) 80 VIN = 4.5V 100 Efficiency (%) Efficiency (%) 100 60 40 20 80 0.1 1 10 IOUT (mA) 100 R1245x00xG/R1245x00xH VOUT=5.0V (Ta=25) VIN = 8.0V VIN = 12V 60 40 20 0 0.01 32 40 20 0.01 1000 10000 100 Efficiency (%) Efficiency (%) 100 60 VIN = 6V VIN = 10V VIN = 12V 0 0 0.01 80 R1245x00xG/R1245x00xH VOUT=3.3V (Ta=25) 80 60 0.1 1 10 IOUT (mA) 100 1000 10000 R1245x00xG/R1245x00xH VOUT=12V (Ta=25) VIN = 24V VIN = 30V 40 20 0 0.1 1 10 IOUT (mA) 100 1000 10000 0.01 0.1 1 10 IOUT (mA) 100 1000 10000 R1245x No. EA-269-170720 25) Output current vs Output voltage (Version A/B) VIN=4.5V VIN=18V 0.806 0.804 0.802 0.800 0.798 0.796 0.794 0.792 0 200 400 600 800 IOUT (mA) VIN = 12V VIN = 30V 5.03 VIN = 24V 5.01 4.99 4.97 VIN = 4.5 V VIN = 24 V 0 200 400 600 IOUT (mA) VIN = 12 V 800 1000 1200 R1245x00xA/R1245x00xB VOUT=12V (Ta=25) 12.30 4.95 VIN = 18V VIN = 30V 12.20 VIN = 24V 12.10 12.00 11.90 0 200 400 600 IOUT (mA) 800 1000 1200 0 R1245x00xA/R1245x00xB VOUT=15V (Ta=25) VIN = 24V VIN = 30V 15.40 15.20 15.00 14.80 0 200 400 600 IOUT (mA) 800 1000 1200 200 400 600 IOUT (mA) 800 1000 1200 R1245x00xA/R1245x00xB VOUT=24V (Ta=25) 24.70 Output Voltage (V) 15.60 Output Voltage (V) R1245x00xA/R1245x00xB VOUT=3.3V (Ta=25) 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.26 3.25 1000 1200 R1245x00xA/R1245x00xB VOUT=5.0V (Ta=25) 5.05 Output Voltage (V) VIN=6.0V Output Voltage (V) Output Voltage(V) 0.808 Output Voltage (V) R1245x00xA/R1245x00xB VOUT=0.8V (Ta=25) VIN = 30V 24.50 24.30 24.10 23.90 0 200 400 600 IOUT (mA) 800 1000 1200 33 R1245x No. EA-269-170720 R1245x00xC/R1245x00xD VOUT=0.8V (Ta=25) 0.808 0.806 0.804 0.802 0.800 0.798 0.796 0.794 0.792 0 4.99 4.97 4.95 200 400 600 IOUT (mA) 800 VIN = 24V VIN = 30V 15.20 15.00 14.80 14.60 0 200 400 600 IOUT (mA) 800 1000 1200 400 600 IOUT (mA) VIN = 12V 800 1000 1200 R1245x00xC/R1245x00xD VOUT=12V (Ta=25) VIN = 18V VIN = 30V 12.10 VIN = 24V 12.00 11.90 11.80 1000 1200 0 R1245x00xC/R1245x00xD VOUT=15V (Ta=25) 15.40 200 12.20 VIN = 24V 5.01 VIN = 4.5V VIN = 24V 0 Output Voltage (V) Output Voltage (V) 5.03 R1245x00xC/R1245x00xD VOUT=3.3V (Ta=25) 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.26 3.25 800 1000 1200 VIN = 12V VIN = 30V 0 Output Voltage (V) 400 600 IOUT (mA) R1245x00xC/R1245x00xD VOUT=5.0V (Ta=25) 5.05 34 200 VIN = 6.0V Output Voltage (V) VIN = 4.5V VIN = 12V 200 400 600 IOUT (mA) 800 1000 1200 R1245x00xC/R1245x00xD VOUT=24V (Ta=25) 24.40 Output Voltage (V) Output Voltage (V) 26) Output current vs. Output voltage (Version C/D) VIN = 30V 24.20 24.00 23.80 23.60 0 200 400 600 IOUT (mA) 800 1000 1200 R1245x No. EA-269-170720 0.808 0.806 0.804 0.802 0.800 0.798 0.796 0.794 0.792 VIN = 4.5V 0 600 800 IOUT (mA) VIN = 12V VIN = 30V 5.03 4.99 4.97 4.95 0 200 400 600 IOUT (mA) 800 15.40 15.20 15.00 14.80 0 200 400 600 IOUT (mA) 800 1000 1200 400 600 IOUT (mA) VIN = 12V 800 1000 1200 R1245x00xE/R1245x00xF VOUT=12V (Ta=25) VIN = 24V 12.10 VIN = 30V 12.00 11.90 11.80 1000 1200 VIN = 24V VIN = 30V 200 12.20 0 R1245x00xE/R1245x00xF VOUT=15V (Ta=25) 15.60 VIN = 4.5V VIN = 24V 0 VIN = 24V 5.01 R1245x00xE/R1245x00xF VOUT=3.3V (Ta=25) 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.26 3.25 1000 1200 Output Voltage (V) Output Voltage (V) 400 R1245x00xE/R1245x00xF VOUT=5.0V (Ta=25) 5.05 Output Voltage (V) 200 Output Voltage (V) R1245x00xE/R1245x00xF VOUT=0.8V (Ta=25) 200 400 600 IOUT (mA) 800 1000 1200 R1245x00xE/R1245x00xF VOUT=24V (Ta=25) 24.40 Output Voltage (V) Output Voltage(V) 27) Output current vs. Output voltage (Version E/F) VIN = 30V 24.20 24.00 23.80 23.60 0 200 400 600 IOUT (mA) 800 1000 1200 35 R1245x No. EA-269-170720 28) Output current vs. Output voltage (Version G/H) R1245x00xG/R1245x00xH VOUT=1.5V (Ta=25) VIN = 4.5V Output Voltage (V) 1.510 1.505 1.500 1.495 1.490 1.485 0 200 800 1000 1200 R1245x00xG/R1245x00xH VOUT=5.0V (Ta=25) 5.05 Output Voltage (V) 400 600 IOUT (mA) VIN = 8.0V 5.03 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.26 3.25 VIN = 12V VIN = 6V VIN = 12V 0 200 400 600 IOUT (mA) 12.20 800 VIN = 24V 12.10 5.01 VIN = 10V 1000 1200 R1245x00xG/R1245x00xH VOUT=12V (Ta=25) Output Voltage (V) Output Voltage (V) 1.515 R1245x00xG/R1245x00xH VOUT=3.3V (Ta=25) VIN = 30V 12.00 4.99 11.90 4.97 4.95 11.80 0 200 400 600 IOUT (mA) 800 1000 1200 0 200 400 600 IOUT (mA) 800 1000 1200 R1245x00xA/R1245x00xB VOUT=0.8V (Ta=25) 0.808 0.806 0.804 0.802 0.800 0.798 0.796 0.794 0.792 IOUT=1mA IOUT=500mA R1245x00xA/R1245x00xB VOUT=3.3V (Ta=25) 3.33 IOUT=1mA IOUT=100mA 3.32 IOUT=10mA IOUT=1200mA 3.31 3.30 3.29 3.28 3.27 4 36 IOUT=100mA IOUT=1200mA Output Voltage (V) Output Voltage (V) 29) Input voltage vs. Output voltage (Version A/B) 6 8 10 VIN (V) 12 14 16 18 4 8 12 16 VIN (V) 20 24 28 R1245x No. EA-269-170720 R1245x00xA/R1245x00xB VOUT=5.0V (Ta=25) IOUT=1mA IOUT=500mA 5.03 IOUT=100mA IOUT=1200mA 5.01 4.99 4.97 12.20 Output Voltage (V) Output Voltage (V) 5.05 R1245x00xA/R1245x00xB VOUT=12V (Ta=25) 4.95 IOUT=500mA 12.10 12.05 12.00 11.95 4 6 8 10 12 14 16 18 20 22 24 26 28 30 VIN (V) 12 R1245x00xA/R1245x00xB VOUT=15V (Ta=25) IOUT=100mA IOUT=1200mA 15.20 IOUT=500mA 15.10 15.00 14 14.90 16 18 20 22 VIN (V) 24 26 28 30 R1245x00xA/R1245x00xB VOUT=24V (Ta=25) 24.20 Output Voltage (V) 15.30 Output Voltage (V) IOUT=100mA IOUT=1200mA 12.15 IOUT=500mA IOUT=100mA IOUT=1200mA 24.10 24.00 23.90 23.80 14 16 18 20 22 VIN (V) 24 26 28 30 24 25 26 27 VIN (V) 28 29 30 R1245x00xC/R1245x00xD VOUT=0.8V (Ta=25) 0.81 0.81 0.80 0.80 0.80 0.80 0.80 0.79 0.79 1mA 500mA 4.5 6 7.5 9 VIN (V) 100mA 1200mA 10.5 12 13.5 R1245x00xC/R1245x00xD VOUT=3.3V (Ta=25) 3.33 Output Voltage (V) Output Voltage (V) 30) Input voltage vs. Output voltage (Version C/D) 1mA 500mA 3.32 3.31 100mA 1200mA 3.30 3.29 3.28 3.27 4 8 12 16 VIN (V) 20 24 28 37 R1245x No. EA-269-170720 R1245x00xC/R1245x00xD VOUT=5.0V (Ta=25) 5.03 5.01 4.99 4.97 4.95 4 Output Voltage (V) 100mA 1200mA 6 12.20 Output Voltage (V) 1mA 500mA 100mA 1200mA 14 11.90 11.80 16 18 20 22 VIN (V) 24 26 28 14 16 18 20 VIN (V) 22 24 26 28 30 R1245x00xC/R1245x00xD VOUT=24V (Ta=25) 24.20 500mA 500mA 12.00 12 R1245x00xC/R1245x00xD VOUT=15V (Ta=25) 15.40 15.30 15.20 15.10 15.00 14.90 14.80 14.70 14.60 100mA 1200mA 12.10 8 10 12 14 16 18 20 22 24 26 28 30 VIN (V) Output Voltage (V) Output Voltage (V) 5.05 R1245x00xC/R1245x00xD VOUT=12V (Ta=25) 100mA 24.10 500mA 1200mA 24.00 23.90 23.80 30 24 25 26 27 VIN (V) 28 29 30 R1245x00xE/R1245x00xF VOUT=0.8V (Ta=25) 0.808 0.806 0.804 0.802 0.800 0.798 0.796 0.794 0.792 1mA 500mA 4.5 38 5 5.5 VIN (V) 100mA 1200mA 6 6.5 R1245x00xE/R1245x00xF VOUT=3.3V (Ta=25) 3.33 Output Voltage (V) Output Voltage (V) 31) Input voltage vs. Output voltage (Version E/F) 1mA 500mA 3.32 3.31 100mA 1200mA 3.30 3.29 3.28 3.27 4 8 12 16 VIN (V) 20 24 28 R1245x No. EA-269-170720 R1245x00xE/R1245x00xF VOUT=5.0V (Ta=25) 5.03 5.01 4.99 4.97 4.95 5 10 15 VIN (V) 20 25 12.20 100mA 1200mA 15.20 15.00 14.80 14.60 16 18 20 22 VIN (V) 24 26 12.00 11.90 11.80 12 28 14 16 18 20 VIN (V) 22 24 26 28 30 R1245x00xE/R1245x00xF VOUT=24V (Ta=25) 24.40 500mA 500mA 100mA 1200mA 12.10 30 R1245x00xE/R1245x00xF VOUT=15V (Ta=25) 15.40 Output Voltage (V) 100mA 1200mA Output Voltage (V) 1mA 500mA Output Voltage (V) Output Voltage (V) 5.05 R1245x00xE/R1245x00xF VOUT=12V (Ta=25) 100mA 1200mA 24.20 500mA 24.00 23.80 23.60 30 26 27 28 VIN (V) 29 30 32) Input voltage vs. Output voltage (Version G/H) R1245x00xG/R1245x00xH VOUT=1.5V (Ta=25) 1mA 500mA Output Voltage (V) 1.510 100mA 1200mA 1.505 1.500 1.495 1.490 1.485 4.5 4.7 4.9 VIN (V) 5.1 5.3 3.33 Output Voltage (V) 1.515 5.5 R1245x00xG/R1245x00xH VOUT=3.3V (Ta=25) 1mA 500mA 3.32 100mA 1200mA 3.31 3.30 3.29 3.28 3.27 4.5 5.5 6.5 7.5 8.5 VIN (V) 9.5 10.5 11.5 12.5 39 R1245x No. EA-269-170720 R1245x00xG/R1245x00xH VOUT=5.0V (Ta=25) 1mA 500mA 5.03 5.01 4.99 4.97 4.95 6 40 100mA 1200mA 8 10 12 VIN (V) 14 16 12.20 Output Voltage (V) Output Voltage (V) 5.05 18 R1245x00xG/R1245x00xH VOUT=12V (Ta=25) 100mA 1200mA 12.10 500mA 12.00 11.90 11.80 14 16 18 20 22 VIN (V) 24 26 28 30 POWER DISSIPATION HSOP-8E Ver. A The power dissipation of the package is dependent on PCB material, layout, and environmental conditions. The following conditions are used in this measurement. Measurement Conditions Ultra-High Wattage Land Pattern Environment Mounting on Board (Wind Velocity = 0 m/s) Board Material Glass Cloth Epoxy Plastic (Four-Layer Board) Board Dimensions 76.2 mm x 114.3 mm x 0.8 mm Copper Ratio Outer Layers (First and Fourth Layers): Approx. 95% of 50 mm Square Inner Layers (Second and Third Layers): Approx. 100% of 50 mm Square Through-holes 0.4 mm x 21 pcs (Ta = 25C, Tjmax = 125C) Measurement Result Ultra-High Wattage Land Pattern Power Dissipation 2.9 W Thermal Resistance ja = (125 - 25C) / 2.9 W = 35C/W jc = 10C/W 76.2 4.0 40 2.9 3.0 50 Ultra-High Wattage Land Pattern 2.0 114.3 Power Dissipation PD (W) 50 1.0 0 0 25 50 75 105 100 125 150 Ambient Temperature (C) Power Dissipation vs. Ambient Temperature IC Mount Area (mm) Measurement Board Pattern i PACKAGE DIMENSIONS HSOP-8E HSOP-8E Package Dimensions The tab on the bottom of the package shown by blue circle is substrate potential (GND/VDD). It is recommended that this tab be connected to the ground plane/VDD pin on the board but it is possible to leave the tab floating. i POWER DISSIPATION DFN(PLP)2020-8 Ver. A The power dissipation of the package is dependent on PCB material, layout, and environmental conditions. The following conditions are used in this measurement. Measurement Conditions Standard Test Land Pattern Environment Mounting on Board (Wind Velocity = 0 m/s) Board Material Glass Cloth Epoxy Plastic (Double-Sided Board) Board Dimensions 40 mm x 40 mm x 1.6 mm Top Side: Approx. 50% Copper Ratio Bottom Side: Approx. 50% Through-holes 0.54 mm x 30 pcs (Ta = 25C, Tjmax = 125C) Measurement Result Standard Test Land Pattern Power Dissipation 880 mW Thermal Resistance ja = (125 - 25C) / 0.88 W = 114C/W 40 1000 880 800 Standard Test Land Pattern 600 40 Power Dissipation PD (mW) 1200 400 200 0 0 25 50 75 100105125 150 Ambient Temperature (C) Power Dissipation vs. Ambient Temperature IC Mount Area (mm) Measurement Board Pattern i PACKAGE DIMENSIONS DFN (PLP) 2020-8 A 1.80.1 B 2.00 5 8 0.250.1 Ver. A X4 0.05 1.00.1 C0.2 INDEX 4 1 S 0.05 S 0.05min 0.6MAX. 0.5 0.250.1 0.250.1 2.00 0.05 M AB Bottom View DFN (PLP) 2020-8 Package Dimensions (Unit: mm) * The tab on the bottom of the package is substrate level (GND). It is recommended that the tab be connected to the ground plane on the board, or otherwise be left floating. i POWER DISSIPATION SOT-23-6W Ver. A The power dissipation of the package is dependent on PCB material, layout, and environmental conditions. The following conditions are used in this measurement. Measurement Conditions Standard Test Land Pattern Environment Mounting on Board (Wind Velocity = 0 m/s) Board Material Glass Cloth Epoxy Plastic (Double-Sided Board) Board Dimensions 40 mm x 40 mm x 1.6 mm Top Side: Approx. 50% Copper Ratio Bottom Side: Approx. 50% Through-holes 0.5 mm x 44 pcs (Ta = 25C, Tjmax = 125C) Measurement Result Standard Test Land Pattern Power Dissipation 430 mW Thermal Resistance ja = (125 - 25C) / 0.43 W = 233C/W Power Dissipation PD (mW) 600 500 430 Standard Test Land Pattern 400 300 200 100 0 0 25 50 75 105 100 125 150 Ambient Temperature (C) Power Dissipation vs. Ambient Temperature IC Mount Area (mm) Measurement Board Pattern i PACKAGE DIMENSIONS SOT-23-6W Ver. A SOT-23-6W Package Dimensions (Unit: mm) i 1. The products and the product specifications described in this document are subject to change or discontinuation of production without notice for reasons such as improvement. Therefore, before deciding to use the products, please refer to Ricoh sales representatives for the latest information thereon. 2. The materials in this document may not be copied or otherwise reproduced in whole or in part without prior written consent of Ricoh. 3. Please be sure to take any necessary formalities under relevant laws or regulations before exporting or otherwise taking out of your country the products or the technical information described herein. 4. The technical information described in this document shows typical characteristics of and example application circuits for the products. The release of such information is not to be construed as a warranty of or a grant of license under Ricoh's or any third party's intellectual property rights or any other rights. 5. 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