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| (R) LPR30 LOW DROP VOLTAGE REGULATOR DRIVE FOR EXTERNAL N-CHANNEL POWER MOSFET s s s s s s s s s VERY LOW DROPOUT POWER MOSFET DRIVER HIGH PRECISION Vref = 2.5V ( 2%) VERY LOW CURRENT DRAIN (TYP. 2mA) REFERENCE OUTPUT CURRENT UP TO 20mA OPERATING SUPPLY VOLTAGE FROM 5V TO 30V MAXIMUM INPUT VOLTAGE ON-GATE PIN (N. 8) UP TO 60V INTERNAL CURRENT LIMIT OPERATIONAL AMPLIFIER OFFSET TRIMMED AT 50mV 10mV NO CAPACITOR IS NEEDED FOR STABILITY OF REFERENCE OUTPUT TEMPERATURE RANGE 0 oC TO 70 oC DIP-8 SO-8 s s LOW PARTS COUNT 5V TO 3.3V COMPUTER SUPPLY LOW NOISE/LOW DROP SMPS POST REGULATOR APPLICATION s ULTRA HIGH CURRENT ULTRA LOW DROPOUT VOLTAGE REGULATOR s CONSTANT HIGH CURRENT SOURCE BLOCK DIAGRAM DESCRIPTION The LPR30 is a very Low Dropout Regulator Controller in a single IC solution for very high current low dropout linear voltgage regulator. It uses an external N-CHANNEL POWER MOSFET as the linear pass element. The LPR30 features a dropout voltage as low as the RDS(on) of the May 2000 1/10 LPR30 external Power MOSFET multiplied by the output current. Consequently the output current can be as high as the POWER MOSFET can provide (also using an adeguate heatsink). The V CC of the LPR30 range from 5V to 30V. For very low drop voltage operation,the LPR30 requires an external gate drive supply to provide the control voltage needed to drive the gate of the external POWER MOSFET. The regulator output is constant-current limited when the controller detects 50mV across an external sense resistor. It has an internal high precision ( 2%) Voltage Reference at 2.5V The output regulated voltage is possible to program to any voltage from 1V to more than 50V. Flexible design is achieved by the availability of the Voltage Reference Output through an external pin (N.4) that is able to supply more than 20mA as load current. The LPR30 is available in 8 pin plastic DIP and in SO-8 for SMD. In both o package versions it is able to operate from 0 C to o 70 C. ABSOLUTE MAXIMUM RATINGS Symbol V CC I oREF P tot T op T st g V gate I gate DC Input Voltage Reference Output Current Power Dissipation Operating Junction Temperature Range Storage Temperature Range Maximum Gate Voltage (pin n8) Maximum Gate Current (pin n8) Parameter Value 36 Internally Limited 1 0 to 70 - 40 to 150 60 200 W o o Unit V C C V mA Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. THERMAL DATA Symbol Parameter Max DIP-8 130 to 180 SO-8 100 to 150 Unit o R thj- amb Thermal Resistance Junction-ambient (*) C/W (*) This value depends from thermal design of PCB on which the device is mounted. CONNECTION DIAGRAM (top view) ORDERING NUMBERS Type LPR30 LPR30N DIP-8 LPR30D SO-8 SO-8 (tape & reel) LPR30D-TR 2/10 LPR30 ELECTRICAL CHARACTERISTICS (Refer to the test circuits, VCC = 10V, Tj = 25 oC unless otherwise specified. GENERAL Symbol V CC ICC Parameter Operating Supply Voltage Supply Current IK = 0 A VCC = 30 V Tj = 0 to 70 oC ERR(-), LIM(-) = 1V ERR(+), LIM(+) = 0V VCC = 5 V IO = 100 mA Tj = 0 to 70 oC ERR(-), LIM(-) = 1V ERR(+), LIM(+) = 0V VCC = 5 V V O = 60 V ERR(-), LIM(-) = 0V ERR(+), LIM(+) = 1V Test Conditions Min. 5 2 Typ. Max. 30 4 Unit V mA V OSAT Output Saturation Voltage 280 500 mV I OLK Output Leakage Current 100 A REFERENCE BLOCK Symbol VREF IK Parameter Reference Output Voltage Reference Output Current IK = 1 to 20 mA CREF = 0 pF VIN < 10 V 1V f = 120 Hz CREF = 0 pF B = 10 Hz to 10 KHz IK = 10 mA CREF = 0 pF Test Conditions Min. 2.45 20 3 70 50 Typ. 2.5 Max. 2.55 Unit V mA mV dB V V REF /I K Reference Output Voltage Change SVR eN Supply Voltage Rejection Output Noise ERROR AMPLIFIER BLOCK Symbol IB V OS IOS GV V CM CMR SVR Parameter Input Bias Current Input OffsetVoltage Input OffsetCurrent Open Loop Gain Tj = 0 to 70 oC o Test Conditions VCC = 5 to 30 V Tj = 0 to 70 C o Min. Typ. 0.3 5 Max. 1 5 50 V CC -1 Unit A mV nA dB V dB dB dB 80 1 70 Input Common Mode Voltage Tj = 0 to 70 C Range Common Mode Rejection Supply Voltage Rejection VIN = 9 to 11V VIN = 9 to 11V f = 120Hz f = 10KHz 70 60 CURRENT LIMITING BLOCK Symbol IB V OS GV V CM Parameter Input Bias Current Input OffsetVoltage Open Loop Gain Tj = 0 to 70 oC Tj = 0 to 70 C o o Test Conditions Min. 40 50 0 Typ. Max. 0.5 60 V CC -3 Unit A V dB V Input Common Mode Voltage Tj = 0 to 70 C Range 3/10 LPR30 TEST CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS Reference Output Voltage vs Temperature Reference Output Voltage vs Load Current 4/10 LPR30 Reference Output Voltage vs Load Current Error Amplifier Output Saturation Voltage vs Temperature Current Limit Input Offset Voltage vs Supply Voltage Current Limit Input Offset Voltage vs Supply Voltage Reference Supply Voltage Rejection vs Output Current Reference Output Noise vs Output Current 5/10 LPR30 APPLICATION INFORMATION Figure 1: LPR30 Typical Application Figure 2: Configuration For Faster Response Figure 3: Configuration For V IN = 3.3V, VOUT = 2.9V, IOUT = 7A (*) This capacitor improves noise performance; can be omitted in most applications 6/10 LPR30 APPLICATION INFORMATION (contiued) Figure 4: Application For Very Fast Responce Speed (*) This capacitor improves noise performance; can be omitted in most applications STANDARD APPLICATION DEMOBOARD Note: This demoboard refers to the typical application shown in figure 1 7/10 LPR30 Plastic DIP-8 MECHANICAL DATA DIM. MIN. A a1 B B1 b b1 D E e e3 e4 F I L Z 0.44 3.3 1.6 0.017 8.8 2.54 7.62 7.62 7.1 4.8 0.130 0.063 0.38 0.7 1.39 0.91 0.5 0.5 9.8 0.346 0.100 0.300 0.300 0.280 0.189 0.015 1.65 1.04 mm TYP. 3.3 0.028 0.055 0.036 0.020 0.020 0.386 0.065 0.041 MAX. MIN. inch TYP. 0.130 MAX. P001F 8/10 LPR30 SO-8 MECHANICAL DATA DIM. MIN. A a1 a2 a3 b b1 C c1 D E e e3 F L M S 3.8 0.4 4.8 5.8 1.27 3.81 4.0 1.27 0.6 8 (max.) 0.14 0.015 5.0 6.2 0.65 0.35 0.19 0.25 0.1 mm TYP. MAX. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 45 (typ.) 0.188 0.228 0.050 0.150 0.157 0.050 0.023 0.196 0.244 0.025 0.013 0.007 0.010 0.003 MIN. inch TYP. MAX. 0.068 0.009 0.064 0.033 0.018 0.010 0.019 0016023 9/10 LPR30 Information furnished is believed to be accurate and reliable. However, STMicroelectronic s assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems withoutexpress written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 2000 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com . 10/10 |
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