MIC69301/2/3 Single Supply VIN, Low VIN, Low VOUT, 3A LDO General Description Features The MIC69301/2/3 is the 3A output current member of the * Input voltage range: VIN: 1.65V to 5.5V MIC69xxx family of high current, low voltage regulators, * Maximum dropout (VIN - VOUT) of 500mV which support currents of 1A, 1.5A, 3A, and 5A. This over temperature family operates from a single low voltage supply, yet offers * Adjustable output voltage down to 0.5V high precision and ultra low dropout of 500mV under worst * Stable with 10F ceramic output capacitor case conditions. * Excellent line and load regulation The MIC69301/2/3 operates from an input voltage of 1.65V * Logic controlled shutdown to 5.5V. It is designed to drive digital circuits requiring low voltage at high currents (i.e., PLDs, DSP, microcontroller, * Thermal shutdown and current-limit protection etc.). These regulators are available in adjustable and * Error flag output fixed output voltages. The adjustable version can support * 5-Pin TO-263 output voltages down to 0.5V. * 5-Pin S-Pak package The Cap design of the MIC69301/2/3 is optimized for * ePad SOIC-8 package stability with low value, low-ESR ceramic output capacitors. * 12-Pin 4mm x 4mm MLFTM package (MIC69303 only) Features of the MIC69301/2/3 include thermal shutdown * -40C to +125C junction temperature range and current limit protection. Logic enable and error flag pins are also available. Applications The MIC69301/2/3 is offered in TO-263, S-PAK and the * Point-of-load applications ePad SOIC-8 packages. The MIC69303 is also available in TM a 12-Pin 4mm x 4mm MLF package. All packages have * Industrial power an operating temperature range of -40C to +125C. * Sensitive RF applications Datasheets and support documentation can be found on Micrel's web site at: www.micrel.com. ___________________________________________________________________________________________________________ Typical Application *Error Flag Output MIC69303 only Fixed 1.2V Regulator w/Error Flag Output Adjustable Regulator MLF and MicroLeadFrame are registered trademarks of Amkor Technologies, Inc. Micrel Inc. * 2180 Fortune Drive * San Jose, CA 95131 * USA * tel +1 (408) 944-0800 * fax + 1 (408) 474-1000 * http://www.micrel.com March 2011 M9999-032111-B Micrel, Inc. MIC69301/2/3 Ordering Information Part Number Nominal Output Voltage Flag Output Junction Temperature Range Package Lead Finish MIC69301-1.2YME 1.2V Yes -40 to +125C 8-Pin ePad SOIC Pb Free MIC69301-1.2WR 1.2V Yes -40 to +125C 5-Pin S-PAK RoHS Compliant MIC69301-1.2WU 1.2V Yes -40 to +125C 5-Pin TO-263 RoHS Compliant MIC69302WR Adj. No -40 to +125C 5-Pin S-PAK RoHS Compliant MIC69302WU Adj. No -40 to +125C 5-Pin TO-263 RoHS Compliant MIC69303YME Adj. Yes -40 to +125C 8-Pin ePad SOIC MIC69303YML Adj. Yes -40 to +125C Pb Free TM 12-Pin 4mm x 4mm MLF Pb Free Pin Configuration March 2011 5-Pin TO-263 (U) (Adjustable Voltage) 5-Pin TO-263 (U) (Fixed Voltage with Flag) 5-Pin S-PAK (R) (Adjustable Voltage) 5-Pin S-PAK (R) (Fixed Voltage with Flag) 8-Pin ePad SOIC (ME) (Adjustable Voltage) 8-Pin ePad SOIC (ME) (Fixed Voltage with Flag) 2 M9999-032111-F Micrel, Inc. MIC69301/2/3 12-Pin 4mm x 4mm MLFTM (ML) (Adjustable Voltage with Flag) Pin Description Pin Number (Fixed) SPAK-5 TO-263-5 Pin Number (Adjustable) SPAK-5 TO-263-5 Pin Number (Fixed) ePad SOIC-8 Pin Number (Adjustable) ePad SOIC-8 Pin Number (Adjustable) ePad 4mm x 4mm MLFTM Pin Name 1 1 2 2 3 EN Enable (Input): CMOS compatible input. Logic high = enable, logic low = shutdown. Do not leave pin floating. 2 2 3,4 3,4 4, 5, 6 IN Input voltage which supplies current to the output power device. 3, TAB 3, TAB 1 1 1 GND Ground (TAB is connected to ground on S-Pak and TO-263). 4 4 5,6 5,6 7, 9 OUT Regulator Output. -- -- 7 -- -- SNS Output voltage sense. Connect to output voltage. -- 5 -- 7 11 ADJ Adjustable regulator feedback input. Connect to resistor voltage divider. 5 -- 8 8 12 FLG Error Flag (Output): Open collector output. Active low indicates an output fault condition. -- -- EP EP EP EP Exposed pad. Connect to GND. -- -- -- -- 2, 8, 10 NC No Connect. Not internally connected. March 2011 3 Pin Function M9999-032111-F Micrel, Inc. MIC69301/2/3 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Input Voltage (VIN to GND) .................. -0.3V to +6V Logic Input Voltage (VEN to GND). .......-0.3V to (VIN + 0.3V) Fault Flag(VFLG to GND ..................................... -0.3V to 6V Storage Temperature (TS).........................-65C to +125C Lead Temperature(TS) .............................................. 260C ESD(4) ............................................................................. 2kV Supply Voltage (VIN)....................................... 1.65V to 5.5V Enable Input Voltage (VEN)..................................... 0V to VIN Junction Temperature (TJ) ..................-40C TJ +125C Power Dissipation (PD)........................... Internally Limited(3) Package Thermal Resistance S-PAK-5 (JC).......................................................2C/W S-PAK-5 (JA).....................................................38C/W TO-263-5 (JC) .....................................................2C/W ePad SOIC-8 (JA) .............................................41C/W 4x4 MLF-12L(JA) .............................................60C/W Electrical Characteristics(4) TA = 25C with VIN = VOUT + 1V; bold values indicate -40C< TJ < +125C; IOUT = 10mA; COUT = 10F ceramic, unless noted. Parameter Test Conditions Min Typ Max Unit 5.5 V Power Input Supply Input Voltage Range (VIN) Ground Pin Current Ground Pin Current in Shutdown 1.65 IOUT = 10mA 1.2 5 mA IOUT = 1.5A 12 30 mA IOUT = 3.0A 32 75 mA VEN = 0V; VIN = 2.0V; VOUT = 0V 1 A Output Voltage Output Voltage (Fixed) -2.0 2.0 % Load Regulation IOUT = 10mA to 3A 0.3 % Line Regulation(5) VIN = VOUT + 1.0V to 5.5V 0.2 0.3 %/V 0.5 0.510 V 0.25 1.0 A Reference (Adjustable) Feedback Reference Voltage (ADJ Pin) (+/- 2.0%) Feedback Bias Current VADJ = 0.5V 0.490 Current Limit Current Limit VOUT = 0V 3.3 5.2 A Power Dropout Voltage Dropout Voltage (VIN - VOUT)(6) IOUT = 1.5A 200 300 mV IOUT = 3.0A 275 500 mV 0.2 V Enable Input Enable Input Threshold Enable Pin Bias Current Turn-on Time Regulator Enabled 0.8 0.57 Regulator Shutdown V VEN 0.2V ( Regulator Shutdown) 0.0 A VEN 0.8V ( Regulator Enabled) 7.0 A 90% of typical VOUT; VEN = VIN 10 150 s 10 14 % Fault Output Fault Threshold Voltage % of VOUT below nominal output (VOUT Falling) Fault Hysteresis Fault Output Low Voltage March 2011 IFLG = 250A (sinking), VEN = 0V 4 7.5 2.0 % 150 mV M9999-032111-F Micrel, Inc. MIC69301/2/3 Electrical Characteristics(4) (Continued) TA = 25C with VIN = VOUT + 1V; bold values indicate -40C< TJ < +125C; IOUT = 10mA; COUT = 10F ceramic, unless noted. Fault Leakage Current VFLG = 5.0V; VEN = 0V 0.05 A TJ Rising 165 C 10 C Thermal Protection Over-Temperature Shutdown Over-Temperature Shutdown Hysteresis Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. The maximum allowable power dissipation of any TA (ambient temperature) is (PD(max) = TJ(max) - TA) / JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature and the regulator will go into thermal shutdown. 4. Specification for packaged product only. 5. Minimum input for line regulation test is set to VOUT + 1V relative to the highest output voltage. 6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. For outputs below 1.65V, dropout voltage is considered the input-to-output voltage differential with the minimum input voltage of 1.65V. Minimum input operating voltage is 1.65V. March 2011 5 M9999-032111-F Micrel, Inc. MIC69301/2/3 Typical Characteristics Power Supply Rejection Ratio 70 60 1.4 1.0 200 40 0.8 150 30 VIN = 3.3V 10 VOUT = 1.8V IOUT = 0.5A 0 1K 10K FREQUENCY (Hz) Dropout Voltage vs. Temperature 400 350 IOUT = 3A 300 250 35 VOUT = 1.2V COUT = 10F 0.5 1.0 1.5 2.0 2.5 OUTPUT CURRENT (A) 0.2 3.0 Ground Current vs. Output Current IOUT = 1.5A 150 45 40 35 30 25 VOUT = 1.2V COUT = 10F 20 40 60 80 TEMPERATURE (C) 50 0 15 Output Voltage vs. Temperature 1.220 1.215 VIN = 2.2V VOUT = 1.2V COUT = 10F 5 0 0 7 0.5 1.0 1.5 2.0 2.5 OUTPUT CURRENT (A) Current Limit vs. Temperature VIN = 2.2V VOUT = 1.2V IOUT = 10mA COUT = 10F 20 40 60 80 TEMPERATURE (C) 1.190 1.185 1.180 0 3 20 15 IOUT = 1.5A 10 VIN = 2.2V 5 VOUT = 1.2V COUT = 10F 0 20 40 60 80 TEMPERATURE (C) Load Regulation 1.300 1.175 2 1 IOUT = 3A 1.200 3 1.195 Ground Current vs. Temperature 1.225 4 1.200 2.5 1.250 5 1.205 0.5 1.0 1.5 2.0 INPUT VOLTAGE (V) 1.275 6 1.210 VOUT = 1.2V COUT = 10F 30 25 10 100 0 0 50 20 200 1.5A 3A 0.4 50 0 0 500mA 0.6 100 20 Dropout Voltage vs. Input Voltage 1.2 250 50 1.0 300 Dropout Voltage vs. Output Current VIN = 2.2V VOUT = 1.2V COUT = 10F 20 40 60 80 TEMPERATURE (C) 1.150 1.125 1.100 0 VIN = 2.2V VOUT = 1.2V COUT = 10F 0.5 1.0 1.5 2.0 2.5 OUTPUT CURRENT (A) 3.0 Enable Threshold vs. Temperature 0.9 0.8 0.7 0.6 ON 0.5 OFF 0.4 0.3 V = 2.2V IN 0.2 VOUT = 1.2V I 0.1 OUT = 100mA COUT = 10F 0 20 40 60 80 TEMPERATURE (C) March 2011 6 M9999-032111-F Micrel, Inc. MIC69301/2/3 Functional Characteristics March 2011 7 M9999-032111-F Micrel, Inc. MIC69301/2/3 Functional Diagram Fixed Output Regulator IN OUT ENABLE EN 0.5V VREF ADJ GND Adjustable Output Regulator March 2011 8 M9999-032111-F Micrel, Inc. MIC69301/2/3 Minimum Load Current The MIC69301/2/3 regulator is specified between finite loads. If the output current is too small, leakage currents dominate and the output voltage rises. A 10mA minimum load current is necessary for proper operation. Application Information The MIC69301/2/3 is an ultra-high performance low dropout linear regulator designed for high current applications requiring a fast transient response. It utilizes a single input supply and has a very low dropout voltage perfect for low-voltage DC-to-DC conversion. The MIC69301/2/3 requires a minimum number of external components. The MIC69301/2/3 regulator is fully protected from damage due to fault conditions offering constant current limiting and thermal shutdown. Adjustable Regulator Design The MIC69302 and MIC69303 adjustable version allows programming the output voltage anywhere between 0.5V and 5.0V with two resistors. The resistor value between VOUT and the adjust pin should not exceed 10k. Larger values can cause instability. The resistor values are calculated by: Input Supply Voltage VIN provides a high current to the collector of the pass transistor. The minimum input voltage is 1.65V allowing conversion from low voltage supplies. R VOUT = 0.5 x 1 + 1 R2 where VOUT is the desired output voltage. Output Capacitor The MIC69301/2/3 requires a minimum of output capacitance to maintain stability. However, proper capacitor selection is important to ensure desired transient response. The MIC69301/2/3 is specifically designed to be stable with low ESR ceramic chip capacitors. A 10F ceramic chip capacitor should satisfy most applications. Output capacitance can be increased without bound. See typical characteristics for examples of load transient response. X7R dielectric ceramic capacitors are recommended because of their temperature performance. X7R-type capacitors change capacitance by only 15% over their operating temperature range and are the most stable type of ceramic capacitors. Z5U and Y5V dielectric capacitors change value by as much as 50% and 60%, respectively over their operating temperature ranges. To use a ceramic chip capacitor with Y5V dielectric the value must be much higher than an X7R ceramic or a tantalum capacitor to ensure the same capacitance value over the operating temperature range. Tantalum capacitors have a very stable dielectric (10% over their operating temperature range) and can also be used with this device. Enable The fixed output voltage versions of the MIC69301 feature an active high enable input (EN) that allows onoff control of the regulator. Current drain reduces to near "zero" when the device is shutdown, with only microamperes of leakage current. EN may be directly tied to VIN and pulled up to the maximum supply voltage. Thermal Design Linear regulators are simple to use. The most complicated design parameters to consider are thermal characteristics. Thermal design requires the following application-specific parameters: * Maximum ambient temperature (TA) * Output current (IOUT) * Output voltage (VOUT) * Input voltage (VIN) * Ground current (IGND) First, calculate the power dissipation of the regulator from these numbers and the device parameters from this data sheet. PD = (VIN - VOUT) x IOUT + VIN x IGND where the ground current is approximated by using numbers from the "Electrical Characteristics" or "Typical Characteristics" sections. The heat sink thermal resistance is then determined with this formula: Input Capacitor An input capacitor of 1F or greater is recommended when the device is more than 4 inches away from the bulk supply capacitance or when the supply is a battery. Small, surface mount, ceramic chip capacitors can be used for the bypassing. The capacitor should be placed within 1 inch of the device for optimal performance. Larger values will help to improve ripple rejection by bypassing the input to the regulator further improving the integrity of the output voltage. March 2011 SA = ((TJ(max) - TA)/ PD) - (JC + CS) Where TJ(max) 125C and CS is between 0C and 2C/W. 9 M9999-032111-F Micrel, Inc. MIC69301/2/3 The heat sink may be significantly reduced in applications where the minimum input voltage is known and is large compared with the dropout voltage. Use a series input resistor to drop excessive voltage and distribute the heat between this resistor and the regulator. The low dropout properties of Micrel Super eta PNP(R) regulators allow significant reductions in regulator power dissipation and the associated heat sink March 2011 without compromising performance. When this technique is employed, a capacitor of at least 1.0F is needed directly between the input and regulator ground. Refer to "Application Note 9" for further details and examples on thermal design and heat sink applications. 10 M9999-032111-F Micrel, Inc. MIC69301/2/3 Package Information 5-Pin S-PAK (R) 5-Pin TO-263 (U) March 2011 11 M9999-032111-F Micrel, Inc. MIC69301/2/3 8-Pin ePad SOIC (ME) 12-Pin ePad MLF 4x4 (ML) March 2011 12 M9999-032111-F Micrel, Inc. MIC69301/2/3 MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel's terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2010 Micrel, Incorporated. March 2011 13 M9999-032111-F