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LX1741CDU-TR Datasheet(PDF) 3 Page - Microsemi Corporation |
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LX1741CDU-TR Datasheet(HTML) 3 Page - Microsemi Corporation |
3 / 15 page Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 Copyright © 2000 Rev. 1.1b, 2005-03-03 LX1741 High Efficiency High Voltage Boost Controller PRODUCTION DATA SHEET I N T E GRA T ED PR ODUC T S ELECTRI CAL CHA RACTERI S TI CS Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA ≤ 70°C except where otherwise noted and the following test conditions: VIN = 3V, VOUT = 18.5V, VADJ = 0V, RLOAD = 9.25kΩ, SHDN = VIN LX1741 Parameter Symbol Test Conditions Min Typ Max Units Operating Voltage VIN 1.6 6.0 V Minimum Start-up Voltage VSU TA = +25°C 1.6 V Start-up Voltage Temperature Coefficient kVST -2 mV/°C VFB = 1.5V 80 100 µA Quiescent Current IQ VSHDN < 0.4V 0.2 0.5 µA FB Threshold Voltage VFB VADJ = GND 1.264 1.290 1.316 V FB Input Bias Current IFB VFB = 1.4V -200 200 nA ADJ Input Voltage Range 1 VADJ 0 VIN – 100mV V ADJ Input Bias Current IADJ VADJ = VFB = 1.29V 0.3 1.0 µA SRC Input Current ISRC 0.8 ARMS Shutdown Input Bias Current ISHDN SHDN = GND -50 50 nA Shutdown High Input Voltage VSHDN VIN = 2V 1.6 V Shutdown Low Input Voltage VSHDN VIN = 2V 0.4 V Current Sense Bias Current ICS 3.0 5.0 7.0 µA Minimum Peak Current IMIN GBNT 2 145 mA Comparator A Delay tD GBNT 2 620 ns NDRV Sink Current ISNK VIN = 5V 50 mA NDRV Source Current ISRC VIN = 5V 100 mA Minimum Off-Time tOFF VFB = 1V 100 500 ns Notes: 1. When using a DC source to adjust VOUT, the recommended VADJ (range) is from 0.9V to 1.50V: see figure 3 and 8. 2. Guaranteed typical value (not tested) @ TA = 25 oC (see section “Inductor Selection and Current Limit Programming”) SI MPLIFI ED BLOCK DI AGRAM Logic Controller Reference Logic ADJ FB Shutdown Logic SHDN CS Driver GND NDRV IN 4µ A SRC 2.5MΩ 50pF A B 1.29V Reference |
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