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L6917B, L6917BDH, L6917BDT

Table of contents:
Info of L6917B
Info of L6917BDH
Info of L6917BDT

L6917B, L6917BDH, L6917BDT Selling Leads, Datasheet

MFG:ST Package Cooled:09+ D/C:1000

L6917B, L6917BDH, L6917BDT Datasheet download

Five Points

Part Number: L6917B

MFG: ST

Package Cooled: 09+

D/C: 1000

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L6917B General Description

The device is a power supply controller specifically designed to provide a high performance DC/DC conversion for high current microprocessors.

The device implements a dual-phase step-down controller with a 180° phase-shift between each phase. A precise 5-bit digital to analog converter (DAC) allows adjusting the output voltage from 1.100V to 1.850V with 25mV binary steps.

The high precision internal reference assures the selected output voltage to be within ±0.8%. The high peak current gate drive affords to have fast switching to the external power mos providing low switching losses.

The device assures a fast protection against load over current and load over/under voltage. An internal crowbar is provided turning on the low side mosfet if an over-voltage is detected. In case of over-current, the system works in Constant Current mode.

L6917B Maximum Ratings

Symbol	Parameter	Value	Unit
V_cc, V_CCDR	to PGND	15	V
V_BOOT-V_PHASE	Boot Voltage	15	V
V_UGATE1-V_PHASE1V_UGATE2-V_PHASE2		15	V
	LGATE1, PHASE1, LGATE2, PHASE2 to PGND	-0.3 to Vcc+0.3	V
	All other pins to PGND	-0.3 to 7	V
V_phase	Sustainable Peak Voltage t < 20ns @ 600kHz	26	V

L6917B Features

· 2 PHASE OPERATION WITH
SYNCRHONOUS RECTIFIER CONTROL
· ULTRA FAST LOAD TRANSIENT RESPONSE
· INTEGRATED HIGH CURRENT GATE DRIVERS: UP TO 2A GATE CURRENT
· TTL-COMPATIBLE 5 BIT PROGRAMMABLE OUTPUT COMPLIANT WITH VRM 9.0
· 0.8% INTERNAL REFERENCE ACCURACY
· 10% ACTIVE CURRENT SHARING ACCURACY
· DIGITAL 2048 STEP SOFT-START
· OVERVOLTAGE PROTECTION
· OVERCURRENT PROTECTION REALIZED USING THE LOWER MOSFET'S R_dsON OR A SENSE RESISTOR
· 300 kHz INTERNAL OSCILLATOR
· OSCILLATOR EXTERNALLY ADJUSTABLE UP TO 600kHz
· POWER GOOD OUTPUT AND INHIBIT FUNCTION
· REMOTE SENSE BUFFER
· PACKAGE: SO-28

L6917B Typical Application

· POWER SUPPLY FOR SERVERS AND WORKSTATIONS
· POWER SUPPLY FOR HIGH CURRENT MICROPROCESSORS
· DISTRIBUTED DC-DC CONVERTERS

L6917B Connection Diagram

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