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RT6919C 数据表(PDF) 1 Page - STMicroelectronics |
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RT6919C 数据表(HTML) 1 Page - STMicroelectronics |
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1 / 32 page  1/32 L6919C December 2002 s 2 PHASE OPERATION WITH SYNCRHONOUS RECTIFIER CONTROL s ULTRA FAST LOAD TRANSIENT RESPONSE s INTEGRATED HIGH CURRENT GATE DRIVERS: UP TO 2A GATE CURRENT s TTL-COMPATIBLE 5 BIT PROGRAMMABLE OUTPUT FROM 0.800V TO 1.550V WITH 25mV STEPS s DYNAMIC VID MANAGEMENT s 0.6% OUTPUT VOLTAGE ACCURACY s 10% ACTIVE CURRENT SHARING ACCURACY s DIGITAL 2048 STEP SOFT-START s OVERVOLTAGE PROTECTION s OVERCURRENT PROTECTION REALIZED USING THE LOWER MOSFET'S RdsON OR A SENSE RESISTOR s OSCILLATOR EXTERNALLY ADJUSTABLE AND INTERNALLY FIXED AT 200kHz s POWER GOOD OUTPUT AND INHIBIT FUNCTION s REMOTE SENSE BUFFER s PACKAGE: SO-28 APPLICATIONS s POWER SUPPLY FOR SERVERS AND WORKSTATIONS s POWER SUPPLY FOR HIGH CURRENT MICROPROCESSORS s DISTRIBUTED POWER SUPPLY DESCRIPTION The device is a power supply controller specifically de- signed to provide a high performance DC/DC conver- sion 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 0.800V to 1.550V with 25mV binary steps managing On-The-Fly VID code changes. The high precision internal reference assures the se- lected output voltage to be within ±0.6%. 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. SO-28 ORDERING NUMBERS:L6919CD L6919CDTR 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT BLOCK DIAGRAM CURREN T REA DIN G I FB TO TA L C U RRENT CH1 OCP DA C D IGITAL SOF T-START CH1 OC P PW M1 ERR OR A MPL IF IER REMO TE BU FFE R 32k 32k 32k LS LS HS Vc c HS BO O T 1 U GA T E1 PH AS E1 LGAT E1 ISE N1 PG N DS 1 PG N D PG N DS 2 ISE N2 LGAT E2 PH AS E2 UGA T E2 BO O T 2 Vcc CO M P FB VS EN FB G FB R VID 0 VID 1 VID 2 VID 3 VID 4 PGOO D O S C / I N H SGND VC CD R 32 k VC C D R VC C CH2 OC P PW M2 CH2 OCP CURREN T REA DIN G CURREN T REA DIN G CURREN T REA DIN G I FB TO TA L C U RRENT CH1 OCP DA C D IGITAL SOF T-START CH1 OC P PW M1 ERR OR A MPL IF IER REMO TE BU FFE R 32k 32k 32k LS LS HS Vc c HS BO O T 1 U GA T E1 PH AS E1 LGAT E1 ISE N1 PG N DS 1 PG N D PG N DS 2 ISE N2 LGAT E2 PH AS E2 UGA T E2 BO O T 2 Vcc CO M P FB VS EN FB G FB R VID 0 VID 1 VID 2 VID 3 VID 4 PGOO D O S C / I N H SGND VC CD R 32 k VC C D R VC C CH2 OC P PW M2 CH2 OCP CURREN T REA DIN G CURREN T REA DIN G |
类似零件编号 - RT6919C |
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类似说明 - RT6919C |
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