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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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LM3103 데이터시트(PDF) 4 Page - Texas Instruments |
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LM3103 데이터시트(HTML) 4 Page - Texas Instruments |
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4 / 20 page  LM3103 SNVS523E – SEPTEMBER 2007 – REVISED NOVEMBER 2009 www.ti.com Electrical Characteristics Specifications with standard type are for TJ = 25°C only; limits in boldface type apply over the full Operating Junction Temperature (TJ) range. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: VIN = 18V, VOUT = 3.3V. Symbol Parameter Conditions Min Typ Max Units Start-Up Regulator, VCC VCC VCC output voltage CVCC = 1 µF, no load 5.6 6.0 6.2 V VIN - VCC VIN - VCC dropout voltage (1) ICC = 2mA 55 150 mV ICC = 10mA 235 500 VCC-UVLO VCC under-voltage lockout threshold VIN increasing 3.5 3.7 4.1 V (UVLO) VCC-UVLO-HYS VCC UVLO hysteresis VIN decreasing 275 mV IIN IIN operating current No switching, VFB = 1V 1.0 1.25 mA IIN-SD IIN operating current, Device shutdown VEN = 0V 20 40 µA IVCC VCC current limit VCC = 0V 20 33 42 mA Switching Characteristics RDS-UP-ON Main MOSFET RDS(on) 0.370 0.7 Ω RDS- DN-ON Syn. MOSFET RDS(on) 0.220 0.4 Ω Soft-start ISS SS pin source current VSS = 0V 45 70 95 µA Current Limit ICL Syn. MOSFET current limit threshold 0.9 A ON/OFF Timer ton ON timer pulse width VIN = 10V, RON = 33 kΩ 0.350 µs VIN = 18V, RON = 33 kΩ 0.170 ton-MIN ON timer minimum pulse width 100 ns toff OFF timer pulse width 240 ns Enable Input VEN EN Pin input threshold VEN rising 1.6 1.85 V VEN-HYS Enable threshold hysteresis VEN falling 230 mV IEN Enable Pull-up Current VEN = 0V 1 µA Regulation and Over-Voltage Comparator VFB In-regulation feedback voltage TJ = −40°C to +125°C 0.588 0.6 0.612 V VFB-OV Feedback over-voltage threshold 0.655 0.680 0.705 V IFB 1 nA Thermal Shutdown TSD Thermal shutdown temperature TJ rising 165 °C TSD-HYS Thermal shutdown temperature TJ falling 20 °C hysteresis (1) VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading. 4 Submit Documentation Feedback Copyright © 2007–2009, Texas Instruments Incorporated Product Folder Links: LM3103 |
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유사한 설명 - LM3103_14 |
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