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L6712AQ 데이터시트(PDF) 1 Page - STMicroelectronics |
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1 / 29 page 1/29 L6712 L6712A June 2005 1 Features ■ 2 PHASE OPERATION WITH SYNCHRONOUS RECTIFIER CONTROL ■ ULTRA FAST LOAD TRANSIENT RESPONSE ■ INTEGRATED HIGH CURRENT GATE DRIVERS: UP TO 2A GATE CURRENT ■ 3 BIT PROGRAMMABLE OUTPUT FROM 0.900V TO 3.300V OR WITH EXTERNAL REF. ■ ±0.9% OUTPUT VOLTAGE ACCURACY ■ 3mA CAPABLE AVAILABLE REFERENCE ■ INTEGRATED PROGRAMMABLE REMOTE SENSE AMPLIFIER ■ PROGRAMMABLE DROOP EFFECT ■ 10% ACTIVE CURRENT SHARING ACCURACY ■ DIGITAL 2048 STEP SOFT-START ■ CROWBAR LATCHED OVERVOLTAGE PROT. ■ NON-LATCHED UNDERVOLTAGE PROT. ■ OVERCURRENT PROTECTION REALIZED USING THE LOWER MOSFET'S RdsON OR A SENSE RESISTOR ■ OSCILLATOR EXTERNALLY ADJUSTABLE AND INTERNALLY FIXED AT 150kHZ ■ POWER GOOD OUTPUT AND INHIBIT FUNCTION ■ PACKAGES: SO-28 & VFQFPN-36 1.1 Applications ■ HIGH CURRENT DC/DC CONVERTERS ■ DISTRIBUTED POWER SUPPLY 2 Description The device implements a dual-phase step-down con- troller with a 180 phase-shift between each phase optimized for high current DC/DC applications. Output voltage can be programmed through the in- tegrated DAC from 0.900V to 3.300V; program- ming the "111" code, an external reference from 0.800V to 3.300V is used for the regulation. Programmable Remote Sense Amplifier avoids use of external resistor divider and recovers loss- es along distribution line. The device assures a fast protection against load over current and Over / Under voltage.An internal crowbar is provided turning on the low side mosfet if Over-voltage is detected. Output current is limited working in Constant Cur- rent mode: when Under Voltage is detected, the device resets, restarting operation. TWO-PHASE INTERLEAVED DC/DC CONTROLLER Figure 1. Packages Table 1. Order Codes Package Tube Tape & Reel SO L6712D, L6712AD L6712DTR, L6712ADTR VFQFPN L6712Q, L6712AQ L6712QTR, L6712AQTR SO28 VFQFPN-36 (6x6x1.0mm) Rev. 3 |
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