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LP6343 数据表(PDF) 3 Page - Lowpower Semiconductor inc |
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LP6343 数据表(HTML) 3 Page - Lowpower Semiconductor inc |
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3 / 12 page  Preliminary Datasheet LP6343 LP6343 –00 Version 1.0 Datasheet Feb.-2010 www.lowpowersemi.com Page 3 of 12 Absolute Maximum Ratings Input Voltage to GND ------------------------------------------------------------------------------------------- 6V SW to GND (VSW) ---------------------------------------------------------------------------- 0.3V to VIN +0.3V FB to GND (VFB) ------------------------------------------------------------------------------ 0.3V to VIN +0.3V EN EN_BAT to GND (VEN) ------------------------------------------------------------------------0.3V to 6V Operating Junction Temperature Range (TJ) ----------------------------------------------------40℃ to 150℃ Maximum Soldering Temperature (at leads, 1 0sec) -----------------------------------------------------260℃ Electrical Characteristics (VIN =VEN,Typical values are TA=25℃ ) Symbol Parameter Conditions LP6343 Unit Min. Typ. Max. VIN Input Voltage 2.5 5.5 V VFB Feedback Threshold Voltage Accuracy VFB, TA=25°C 0.588 0.6 0.612 V VFB, TA= -40°C ~+85°C 0.582 0.6 0.618 △ VOUT Output Voltage Line Regulation ILOAD = 0 VINB = 2.5V to 5.5V 0.04 0.4 %/ v △ VFB Reference Voltage Line Regulation VINB = 2.5V to 5.5V 0.04 0.4 %/ v VOUT Output Voltage Range 0.6 VINB V IQ Quiescent Current Active, VFB =0.5V,VIN= VEN 170 µA PSM,VFB =0.7V,VIN= VEN 80 µA ISHDN Shutdown Current VEN =0V 1 µA ILIM P-Channel Current Limit 3.8 A IPK Peak Inductor Current VFB =0.5V 3.5 A RDS(ON)H High-Side Switch On Resistance 135 m RDS(ON)L Low-Side Switch On Resistance 130 m ILXLEAK LX Leakage Current VEN=0V, VSW=0 or 5V, VIN=5V 1 µA Δ VLine-reg/ΔVIN Line Regulation VIN = 2.8V to 5.5V 0.2 0.4 %/V IFB FB Leakage Current VOUT = 1 .0V 30 nA FOSC Oscillator Frequency VFB =0V 1.2 1.5 1.8 MHz TS Startup Time From Enable to Output Regulation 120 µs TSD Over-Temperature Shutdown Threshold 150 ℃ THYS Over-Temperature Shutdown Hysteresis 20 ℃ VEN(L) Enable Threshold Low 0.4 V VEN(H) Enable Threshold High 0.3 1.0 1.5 V IEN Input Low Current VIN = VEN = 5.5V -1 1 µA Note: Output Voltage: Vout = 0.6 X (1+R2/R1) Volts; |
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