LX1682CDM Microsemi Analog Mixed Signal Group, LX1682CDM Datasheet
LX1682CDM
Specifications of LX1682CDM
Available stocks
Related parts for LX1682CDM
LX1682CDM Summary of contents
Page 1
... Microprocessor Chipset Supplies (e.g. Camino, Whitney, etc.) © Rambus RIMM™ Supplies Hard Disk Drives Computer Add-on Cards V V BOO ST IN 12V 1µ 1500µ LX1682 IRL3103S 1500µF 1 TDRV 5µ SET IRL3103S Plastic SOIC 8-PIN Transition D/C: 0440 LX1681CDM LX1682CDM Page 1 ...
Page 2
Supply Voltage (V ).................................................................................................... 18V C1 Supply Voltage (V ) ...
Page 3
TM Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C otherwise noted. Test conditions: V =5V Parameter REFERENCE Reference Voltage OSCILLATOR Frequency Ramp Amplitude ERROR AMPLIFIER Input Resistance CURRENT SENSE Current Set V TRIP ...
Page 4
TM GENERAL DESCRIPTION The LX1681/82 are voltage-mode pulse-width modulation controller integrated circuits. The internal oscillator and ramp generator frequency is fixed at 200kHz. The devices have internal compensation, so that no external compensation is required. POWER UP and INITIALIZATION At ...
Page 5
TM OUTPUT INDUCTOR The output inductor should be selected to meet the requirements of the output voltage ripple in steady-state operation and the inductor current slew-rate during transient. The peak-to-peak output voltage ripple is: V ESR = RIPPLE where ( ...
Page 6
TM SOFT-START CAPACITOR (continued) The capacitor current to follow the SS-pin voltage is OUT = = OUT OUT where C is the output capacitance. The typical value of C OUT should be ...
Page 7
TM FET SELECTION (continued) Synchronous Rectification – Lower MOSFET The lower pass element can be either a MOSFET or a Schottky diode. The use of a MOSFET (synchronous rectification) will result in higher efficiency, but at higher cost than using ...
Page 8
0.1µ 0.1µF Copyright © 2000 Rev. 1.1b,2005-03-09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Voltage-Mode PWM Controllers P RODUCTION ...
Page 9
Com RES 320k 20k 1 - Error Com plifier Com pensation ...