LOW DROPOUT AND LOW NOISE VOLTAGE REGULATOR NO. EA-039-0204 Rx5RZ SERIES OUTLINE The Rx5RZ Series are CMOS-based voltage regulator ICs with high output voltage accuracy, low supply current, low dropout voltage and high ripple rejection. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier, output voltage setting resistors, a current limit circuit and a chip enable circuit. (Provided two types of chip enable circuit ; "H" active and "L" active, that can be selected when order.)for A/B version The output voltage of these ICs is fixed with high accuracy. In addition to low supply current from CMOS process, the Rx5RZ Series may lengthen battery life through low dropout voltage and chip enable function thanks to the built-in low ON resistance transistor. Also when compared with conventional regulators that employ CMOS process, these ICs have superior ripple rejection, input transient response characteristic and load transient response characteristic thus making these product suitable for power supply for hand-held communication equipment. Since the package for these ICs are the SOT-23-5 package and SOT89, high density mounting of the ICs on boards is possible. FEATURES * Ultra-Low Supply Current ...........................................Typ. 20A * Ultra-Low Supply Current (Standby).........................Typ. 0.1A (for A/B version) * High Accuracy Output Voltage ..................................2.0% * High Ripple Rejection .................................................Typ. 55dB (f=1kHz) * Low Dropout Voltage ..................................................Typ. 0.2V (IOUT=60mA) * Low Temperature-Drift Coefficient of Output Voltage........Typ. 100ppm/C * Excellent Line Regulation ...........................................Typ. 0.05%/V * Output Voltage .............................................................Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V is possible (refer to Selection Guide). * Built-in Short Current Limit Circuit ...........................Typ. 50mA * Small Package ..............................................................SOT-23-5 (Mini-mold), SOT89 APPLICATIONS * Power source for battery-powered equipment. * Power source for cellular phones, cameras, VCRs, camcorders, hand-held audio instruments and hand-held communication equipment. * Power source for domestic appliances. 1 Rx5RZ BLOCK DIAGRAMS RN5RZxxB RN5RZxxA 3 VOUT VDD 2 3 VOUT VDD 2 - - + + Vref Vref Current Limit CE 5 Current Limit 1 GND CE 5 1 GND RH5RZxxC 3 VOUT VDD 2 - + Vref Current Limit 1 GND SELECTION GUIDE The output voltage, the active type of the chip enable circuit, the packing type, and the taping type for the ICs can be selected at the user's request. These selections can be made by designating the part number as shown below: } a } Rx5RZ xxxx- xx Part Number b cd e Code a b c d e Contents Package type: N : SOT23-5 H : SOT89 Setting Output Voltage (VOUT) : Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V is possible. Designation of Active Type of The Chip Enable Circuit : A : "L" active type B : "H" active type C : no CE pin Designation of Packing Type : A : Taping C : Antistatic bag (for Samples only) Designation of Taping Type : Ex. TR, TL (refer to Taping Specifications ; TR type is the standard direction.) For example, the product with Output Voltage of 5.0V, Specified Polarity of Chip Enable is "H" active and Taping Type TR is designated by Part Number RN5RZ50BA-TR. 2 Rx5RZ PIN CONFIGURATION * SOT-23-5 5 * SOT89 4 (mark side) 1 2 (mark side) 1 3 2 3 PIN DESCRIPTION Pin No. Symbol Description 1 GND Ground Pin 2 VDD Input Pin 3 VOUT Output Pin 4 NC No Connection 5 CE or CE Chip Enable Pin ABSOLUTE MAXIMUM RATINGS Symbol Item Ratings Unit 9 V VIN Input Voltage VCE Input Voltage (CE or CE Pin) -0.3 to VIN +0.3 V VOUT Output Voltage -0.3 to VIN +0.3 V IOUT Output Current 200 mA PD Power Dissipation 250 (SOT23-5) 500 (SOT89) mW Topt Operating Temperature -40 to +85 C Tstg Storage Temperature -55 to +125 C ABSOLUTE MAXIMUM RATINGS Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress ratings only and do not necessarily imply functional operation below these limits. 3 Rx5RZ ELECTRICAL CHARACTERISTICS * RN5RZxxA Series Symbol Item VOUT Output Voltage IOUT Output Current VOUT IOUT Load Regulation VDIF Dropout Voltage ISS Supply Current Istandby Supply Current (Standby) VOUT VIN Line Regulation RR Ripple Rejection VIN Input Voltage VOUT Topt 4 Topt=25C Output Voltage Temperature Coefficient Conditions Min. VIN=VOUT+1V, IOUT=30mA x0.98 VIN=VOUT+1V When VOUT=VOUT-0.1V Typ. Max. Unit x1.02 V 100 VIN=VOUT+1V mA 20 40 mV IOUT=60mA 0.2 0.3 V VIN=VOUT+1V 20 40 A VIN=VCE=VOUT+1V 0.1 1.0 A 0.05 0.20 %/V 1mAIOUT80mA IOUT=30mA VOUT+0.5VVIN8.0V f=1kHz, Ripple 0.5Vrms 55 VIN=VOUT+1V dB 8 IOUT=30mA -40CTopt85C Ilim Short Current Limit VOUT=0V RPU CE Pull-up Resistance 2.5 VCEH CE Input Voltage "H" 1.5 VCEL CE Input Voltage "L" 0.00 V 100 ppm/C 50 mA 5.0 10.0 M V 0.25 V Rx5RZ * RN5RZxxB Series Symbol Topt=25C Item Conditions Min. Typ. Max. Unit x 1.02 V VOUT Output Voltage VIN=VOUT+1V, IOUT=30mA x 0.98 IOUT Output Current VIN=VOUT+1V When VOUT=VOUT-0.1V 100 VOUT IOUT Load Regulation VIN=VOUT+1V 1mAIOUT80mA 20 40 mV VDIF Dropout Voltage IOUT=60mA 0.2 0.3 V ISS Supply Current VIN=VOUT+1V 20 40 A VIN=VOUT+1V, VCE=GND 0.1 1.0 A 0.20 %/V Istandby Supply Current (Standby) mA VOUT VIN Line Regulation IOUT=30mA VOUT+0.5VVIN8.0V 0.05 RR Ripple Rejection f=1kHz, Ripple 0.5Vrms VIN=VOUT+1V 55 VIN Input Voltage VOUT Topt dB 8 Output Voltage Temperature Coefficient IOUT=30mA -40CTopt85C 100 ppm/C VOUT=0V 50 mA Ilim Short Current Limit RPU CE Pull-down Resistance 2.5 VCEH CE Input Voltage "H" 1.5 VCEL CE Input Voltage "L" 0.00 5.0 10.0 M V 0.25 * RH5RZxxC Series Symbol V V Topt=25C Item Conditions Min. Typ. Max. Unit x 1.02 V VOUT Output Voltage VIN=VOUT+1V, IOUT=30mA x 0.98 IOUT Output Current VIN=VOUT+1V 100 VOUT IOUT Load Regulation VIN=VOUT+1V 1mAIOUT80mA 20 40 mV VDIF Dropout Voltage IOUT=60mA 0.2 0.3 V ISS Supply Current VIN=VOUT+1V 20 40 A VOUT VIN Line Regulation IOUT=30mA VOUT+0.5VVIN8.0V 0.05 0.20 %/V RR Ripple Rejection f=1kHz, Ripple 0.5Vrms VIN=VOUT+1V 55 VIN Input Voltage VOUT Topt Ilim Output Voltage Temperature Coefficient Short Current Limit mA dB 8 V IOUT=30mA -40CTopt85C 100 ppm/C VOUT=0V 50 mA 5 Rx5RZ OPERATION RN5RZxxB RN5RZxxA 3 VOUT VDD 2 3 VOUT VDD 2 - Error Amp. - + R1 Current Limit R2 Error Amp. Vref + R1 Current Limit R2 Vref CE 5 1 GND CE 5 1 GND RH5RZxxC 3 VOUT VDD 2 - + R1 Current Limit R2 Vref 1 GND In these ICs, the output voltage VOUT is detected by feed-back registers R1, R2, and the detected output voltage is compared with a reference voltage by an error amplifier, so that a constant voltage is output. A current limit circuit working for short protection and a chip enable circuit for standby function are included. TEST CIRCUITS 2 VDD VOUT 3 IOUT C1 5 CE C2 GND 1 VOUT 3 C1 5 CE C2 GND 1 C1 : 1F C2 : 10F Fig.1 Standard Test Circuit 6 VIN VDD RN5RZxxB SERIES A RN5RZxxB SERIES VIN 2 C1 : 1F C2 : 10F Fig.2 Supply Current Test Circuit Rx5RZ 2 VDD VOUT 3 IOUT RN5RZxxB SERIES P.G. 5 VIN CE C1 GND 1 C1 : 10F Fig.3 Line Transient Response Test Circuit 2 VDD VOUT 3 RN5RZxxB SERIES VIN C1 5 CE C2 GND l1 1 l2 C1 : 1F C2 : 10F Fig.4 Load Transient Response Test Circuit 2 VIN VDD VOUT 3 IOUT RN5RZxxB SERIES C1 5 CE C2 GND 1 C1 : 1F C2 : 10F Fig.5 Ripple Rejection Test Circuit 7 Rx5RZ TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current Rx5RZ30x Rx5RZ40x 5.0 3.5 4.0V 5.0V VIN=3.3V 2.5 4.5 Output Voltage VOUT(V) Output Voltage VOUT(V) 3.5V 3.0 2.0 1.5 1.0 0.5 4.5V 5.0V 4.0 6.0V VIN=4.3V 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.0 0 100 200 300 400 500 0 Output Current IOUT(mA) 100 200 300 400 500 Output Current IOUT(mA) Rx5RZ50x 6.0 Output Voltage VOUT(V) 6.0V 5.0 7.0V VIN=5.3V 4.0 5.5V 3.0 2.0 1.0 0.0 0 100 200 300 400 500 Output Current IOUT(mA) 2) Output Voltage vs. Input Voltage Rx5RZ30x Rx5RZ40x 5.0 3.5 3.0 2.5 2.0 1.5 IOUT=0mA 1.0 IOUT=30mA 0.5 IOUT=50mA 0.0 0.0 2.0 4.0 6.0 Input Voltage VIN(V) 8 Output Voltage VOUT(V) Output Voltage VOUT(V) 4.0 4.0 3.0 2.0 IOUT=0mA IOUT=30mA 1.0 IOUT=50mA 8.0 0.0 0.0 2.0 4.0 6.0 Input Voltage VIN(V) 8.0 Rx5RZ Rx5RZ50x Output Voltage VOUT(V) 6.0 5.0 4.0 3.0 IOUT=0mA 2.0 IOUT=30mA 1.0 IOUT=50mA 0.0 0.0 2.0 4.0 6.0 8.0 Input Voltage VIN(V) 3) Dropout Voltage vs. Output Current Rx5RZ40x 0.30 0.25 0.25 0.20 0.15 0.10 Topt=-40C 0.05 Topt=25C Dropout Voltage VDIF(V) Dropout Voltage VDIF(V) Rx5RZ30x 0.30 0.20 0.15 0.10 Topt=-40C 0.05 Topt=25C Topt=85C Topt=85C 0.00 0.00 0 20 40 60 80 100 Output Current IOUT(mA) 0 20 40 60 80 100 Output Current IOUT(mA) Rx5RZ50x Dropout Voltage VDIF(V) 0.35 0.30 0.25 0.20 0.15 Topt=-40C 0.10 Topt=25C 0.05 Topt=85C 0.00 0 20 40 60 80 100 Output Current IOUT(mA) 9 Rx5RZ 4) Output Voltage vs. Temperature Rx5RZ30x Rx5RZ40x 4.10 Output Voltage VOUT(V) Output Voltage VOUT(V) 3.10 3.05 3.00 2.95 2.90 -50 0 50 4.05 4.00 3.95 3.90 -50 100 Temperature Topt(C) 0 50 100 Temperature Topt(C) Rx5RZ50x Output Voltage VOUT(V) 5.10 5.05 5.00 4.95 4.90 -50 0 50 100 Temperature Topt(C) 5) Supply Current vs. Input Voltage Rx5RZ40x 30 25 25 Supply Current ISS(A) Supply Current ISS(A) Rx5RZ30x 30 20 15 10 5 0 0.0 2.0 4.0 6.0 Input Voltage VIN(V) 10 8.0 20 15 10 5 0 0.0 2.0 4.0 6.0 Input Voltage VIN(V) 8.0 Rx5RZ Rx5RZ50x Supply Current ISS(A) 30 25 20 15 10 5 0 0.0 2.0 4.0 6.0 8.0 Input Voltage VIN(V) 6) Supply Current vs. Temperature Rx5RZ40x 30 25 25 Supply Current ISS(A) Supply Current ISS(A) Rx5RZ30x 30 20 15 10 5 0 -50 0 50 100 Temperature Topt(C) 20 15 10 5 0 -50 0 50 100 Temperature Topt(C) Rx5RZ50x Supply Current ISS(A) 30 25 20 15 10 5 0 -50 0 50 100 Temperature Topt(C) 11 Rx5RZ 7) Dropout Voltage vs. Set Output Voltage Rx5RZxxx Topt=25C Dropout Voltage VDIF(V) 0.35 IOUT=10mA 0.30 IOUT=30mA 0.25 IOUT=50mA 0.20 IOUT=100mA 0.15 0.10 0.05 0.00 2 3 4 5 6 Set Output Voltage Vreg(V) 8) Ripple Rejection vs. Frequency Rx5RZ30x Rx5RZ30x COUT=tantal 2.2F 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 Frequency f(kHZ) 12 30 20 10 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 Rx5RZ40x COUT=tantal 10F 40 0 0.1 40 Rx5RZ30x 50 10 50 Frequency f(kHZ) 60 20 60 0 0.1 100 70 30 70 Frequency f(kHZ) 80 Ripple Rejection RR(dB) Ripple Rejection RR(dB) 70 COUT=tantal 4.7F 80 100 100 COUT=tantal 2.2F 80 Ripple Rejection RR(dB) Ripple Rejection RR(dB) 80 70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 Frequency f(kHZ) 100 Rx5RZ Rx5RZ40x Ripple Rejection RR(dB) 70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 40 30 20 10 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 Rx5RZ50x Rx5RZ50x COUT=tantal 2.2F 50 40 0 0.1 50 Frequency f(kHZ) 60 10 60 0 0.1 100 70 20 70 Frequency f(kHZ) 80 30 COUT=tantal 10F 80 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100 Frequency f(kHZ) 100 COUT=tantal 4.7F 80 Ripple Rejection RR(dB) Ripple Rejection RR(dB) 80 Ripple Rejection RR(dB) Rx5RZ40x COUT=tantal 4.7F 70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100 Frequency f(kHZ) Rx5RZ50x COUT=tantal 10F Ripple Rejection RR(dB) 80 70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100 Frequency f(kHZ) 13 Rx5RZ 9) Ripple Rejection vs. Input Voltage (DC bias) Rx5RZ30x IOUT =10mA Rx5RZ30x IOUT =1mA COUT=tantal 10F 60 50 40 30 f=400Hz 20 f=1kHz 10 60 50 40 30 3.2 3.3 3.4 f=400Hz 20 f=1kHz 10 f=10kHz 0 3.1 COUT=tantal 10F 70 Ripple Rejection RR(dB) Ripple Rejection RR(dB) 70 f=10kHz 0 3.1 3.5 3.2 3.3 3.4 Input Voltage VIN(V) Input Voltage VIN(V) Rx5RZ30x IOUT =50mA COUT=tantal 10F Ripple Rejection RR(dB) 70 60 50 40 30 f=400Hz 20 f=1kHz 10 f=10kHz 0 3.1 3.2 3.3 3.4 3.5 Input Voltage VIN(V) 10) Line Transient Response tr=tf=5S COUT=Ceramic 2.2F+ESR 1 6 Input Voltage 3.3 5 3.2 4 3.1 3 Output Voltage 3.0 2 2.9 1 2.8 0 10 20 30 40 50 Time t(S) 14 60 70 80 90 0 100 Input Voltage VIN(V) Output Voltage VOUT(V) 3.4 3.5 Rx5RZ tr=tf=5S COUT=Tantal 3.3F 6 3.3 5 Input Voltage 3.2 4 3.1 3 Output Voltage 3.0 2 2.9 1 2.8 0 10 20 30 40 50 60 70 80 Input Voltage VIN(V) Output Voltage VOUT(V) 3.4 0 100 90 Time t(S) tr=tf=5S COUT=Tantal 10F 6 3.3 5 Input Voltage 3.2 4 3.1 3 Output Voltage 3.0 2 2.9 1 2.8 0 10 20 30 40 50 60 70 80 Input Voltage VIN(V) Output Voltage VOUT(V) 3.4 0 100 90 Time t(S) 11) Load Transient Response COUT=Ceramic 2.2F+1 150 Output Current 3.3 100 3.2 50 Output Voltage 3.1 0 3.0 -50 2.9 -100 2.8 0 10 20 30 40 50 60 70 80 90 Output Current IOUT(mA) Output Voltage VOUT(V) 3.4 -150 100 Time t(S) 15 Rx5RZ COUT=Tantal 2.2F 150 3.3 100 Output Current 3.2 50 Output Voltage 3.1 0 3.0 -50 2.9 -100 2.8 0 10 20 30 40 50 60 70 80 90 Output Current IOUT(mA) Output Voltage VOUT(V) 3.4 -150 100 Time t(S) COUT=Tantal 3.3F 150 3.3 100 Output Current 3.2 50 Output Voltage 3.1 0 3.0 -50 2.9 -100 2.8 0 10 20 30 40 50 60 70 80 90 Output Current IOUT(mA) Output Voltage VOUT(V) 3.4 -150 100 Time t(S) COUT=Tantal 10F 150 3.3 100 Output Current 3.2 50 Output Voltage 3.1 0 3.0 -50 2.9 -100 2.8 0 10 20 30 40 50 Time t(S) 16 60 70 80 90 -150 100 Output Current IOUT(mA) Output Voltage VOUT(V) 3.4 Rx5RZ FOR STABLE OPERATION * Countermeasure for Noise 2 VIN VOUT RN5RZxxB SERIES VIN 5 CE 3 Ceramic Capacitor S.A. Spectrum Analyzer GND 1 ESR IOUT Ceramic capacitor 0.01F Measuring circuit for white noise ; RN5RZ30B The relationship between output current (IOUT) and Equivalent Series Resistance (ESR) in the output capacitor is described in the graphs below. The conditions when the noise level is under 40V (Avg.) are indicated by the hatched area in the graph. [Measuring conditions] Frequency band : 0Hz to 1MHz Temperature : 25C Ceramic Capacitor 1F Ceramic Capacitor 2.2F : Noise level is under 40V 100.0 10.0 ESR(W) ESR(W) 10.0 1.0 0.1 0.0 0.0 : Noise level is under 40V 100.0 1.0 0.1 20.0 40.0 60.0 80.0 Output Current IOUT(mA) 100.0 0.0 0.0 20.0 40.0 60.0 80.0 100.0 Output Current IOUT(mA) 17 Rx5RZ Ceramic Capacitor 10F Ceramic Capacitor 4.7F : Noise level is under 40V 100.0 10.0 ESR(W) ESR(W) 10.0 1.0 1.0 0.1 0.1 0.0 0.0 : Noise level is under 40V 100.0 20.0 40.0 60.0 80.0 100.0 0.0 0.0 20.0 40.0 60.0 80.0 100.0 Output Current IOUT(mA) Output Current IOUT(mA) APPLICATION HINTS When using these ICs, be sure to take care regarding the following points : * In these ICs, phase compensation is made for securing stable operation even when the load current is varied. For this purpose, be sure to use a capacitor COUT with good frequency characteristics and ESR in the range described above. * Make VDD and GND lines sufficient. If their impedance is high, the noise picked up or unstable operation may result. * Connect the capacitor with a capacitance of about 1F between VDD and GND with wiring as short as possible. * Set external components as close as possible to the ICs and make wiring as short as possible. 18 PACKAGE INFORMATION * PE-SOT-23-5-071228 SOT-23-5 (SC-74A) Unit: mm PACKAGE DIMENSIONS 2.90.2 +0.2 1.1 -0.1 1.90.2 (0.95) (0.95) 2 0 to 0.1 3 +0.1 0.15 -0.05 0.40.1 0.2 Min. 1 2.8-0.3 4 +0.2 1.6 -0.1 5 0.80.1 3.2 3.5-0.05 2.0-0.05 8.0-0.3 4.0-0.1 +0.1 1.5 0 0.3-0.1 1.75-0.1 TAPING SPECIFICATION 3.3 4.0-0.1 2.0Max. 1.10.1 TR User Direction of Feed TAPING REEL DIMENSIONS REUSE REEL (EIAJ-RRM-08Bc) (1reel=3000pcs) 20.5 210.8 60 +1 0 180 0 -1.5 130.2 11.41.0 9.00.3 PACKAGE INFORMATION PE-SOT-23-5-071228 POWER DISSIPATION (SOT-23-5) This specification is at mounted on board. Power Dissipation (PD) depends on conditions of mounting on board. This specification is based on the measurement at the condition below: (Power Dissipation (SOT-23-5) is substitution of SOT-23-6.) Measurement Conditions Standard Land Pattern Environment Mounting on Board (Wind velocity=0m/s) Board Material Glass cloth epoxy plastic (Double sided) Board Dimensions 40mm x 40mm x 1.6mm Copper Ratio Top side : Approx. 50% , Back side : Approx. 50% Through-hole 0.5mm x 44pcs Measurement Result (Topt=25C, Tjmax=125C) Standard Land Pattern Free Air Power Dissipation 420mW 250mW Thermal Resistance ja=(125-25C)/0.42W=238C/W 400C/W 600 On Board 420 400 Free Air 300 250 40 Power Dissipation PD(mW) 40 500 200 100 0 0 25 50 75 85 100 Ambient Temperature (C) 125 150 Power Dissipation Measurement Board Pattern IC Mount Area Unit : mm RECOMMENDED LAND PATTERN 0.7 MAX. 1.0 2.4 0.95 0.95 1.9 (Unit: mm) PACKAGE INFORMATION * PE-SOT-89-071210 SOT-89 (SC-62) Unit: mm PACKAGE DIMENSIONS 4.50.1 1.50.1 1.60.2 0.1 S 3 2 1.00.2 1 S 0.4 7 0.1 0.420.1 1.50.1 2 3 0.40.1 Bottom View 0.420.1 1.50.1 4.00.1 2.00.05 4.7 5.650.05 0.30.1 120.3 +0.1 1.5 0 1.50.1 TAPING SPECIFICATION (T1: Standard Type) 5.0 2.5Max. 8.00.1 T1 1.60.1 User Direction of Feed TAPING REEL DIMENSIONS (1reel=1000pcs) 60 +1 0 0 180 -1.5 210.8 130.2 15.41.0 130.3 20.5 1 0.30.2 2.50.1 1.0 +0.25 4.0 -0.35 0.40.1 PACKAGE INFORMATION PE-SOT-89-071210 POWER DISSIPATION (SOT-89) This specification is at mounted on board. Power Dissipation (PD) depends on conditions of mounting on board. This specification is based on the measurement at the condition below: Measurement Conditions Standard Land Pattern Environment Mounting on Board (Wind velocity=0m/s) Board Material Glass cloth epoxy plastic (Double sided) Board Dimensions 50mm x 50mm x 1.6mm Copper Ratio Top side : Approx. 10% , Back side : Approx. 100% Through-hole - Measurement Result (Topt=25C,Tjmax=125C) Standard Land Pattern Free Air Power Dissipation 900mW 500mW Thermal Resistance ja=(125-25C)/0.9W=111C/W 200C/W 50 1000 On Board 750 Free Air 500 50 Power Dissipation PD(mW) 900 250 0 0 25 50 75 100 Ambient Temperature (C) 125 150 Power Dissipation Measurement Board Pattern IC Mount Area (Unit : mm) RECOMMENDED LAND PATTERN (SOT-89) 3.0 2.0 1.5 0.7 45 1.0 1.0 1.5 1.0 1.5 (Unit : mm)