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L6918 데이터시트(PDF) 1 Page - STMicroelectronics |
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L6918 데이터시트(HTML) 1 Page - STMicroelectronics |
1 / 35 page 1/35 L6918 L6918A October 2002 s OUTPUT CURRENT IN EXCESS OF 100A s ULTRA FAST LOAD TRANSIENT RESPONSE s REMOTE SENSE BUFFER s INTEGRATED 2A GATE DRIVERS s 5 BIT VID VOLTAGE POSITIONING, VRM 9.0 s 0.6% INTERNAL REFERENCE ACCURACY s DIGITAL 2048 STEP SOFT-START s OVP & OCP PROTECTIONS s Rdson or Rsense CURRENT SENSING s 1200KHz EFFECTIVE SWITCHING FREQUENCY, EXTERNALLY ADJUSTABLE s POWER GOOD OUTPUT AND INHIBIT s PACKAGE: SO28 APPLICATIONS s HIGH DENSITY DC-DC FOR SERVERS AND WORKSTATIONS s SUPPLY FOR HIGH CURRENT MICROPROCESSORS s DISTRIBUTED POWER DESCRIPTION L6918A is a master device that it has to be combined with the L6918,slave, realizing a 4-phases topology, interleaved. The device kit is specifically designed to provide a high performance/high density DC/DC con- version for high current microprocessors and distrib- uted power. Each device implements a dual-phase step-down controller with a 180° phase-shift between each phase. A precise 5-bit DAC allows adjusting the output volt- age from 1.100V to 1.850V with 25mV binary steps. The high peak current gate drives affords to have high system switching frequency, typically of 1200KHz, and higher by external adjustement. The device kit assure a fast protection against OVP, UVP and OCP. An internal crowbar, by turning on the low side mosfets, eliminates the need of external pro- tection. In case of over-current, the system works in Constant Current mode. SO28 ORDERING NUMBERS: L6918D, L6918AD L6918DTR, L6918ADTR 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER PIN CONNECTIONS 1 3 2 4 5 6 7 8 9 18 17 16 15 19 20 10 11 12 13 14 24 23 22 21 25 26 27 28 LGATE1 VCCDR PHASE1 FB BOOT1 UGATE1 VSEN VCC SGND COMP ISEN1 PGNDS1 FBR FBG SYNC_IN SLAVE_OK SYNC / ADJ VPROG_IN BOOT2 PGOOD UGATE2 PHASE2 LGATE2 PGND OSC / INH / FAULT ISEN2 PGNDS2 SYNC_OUT 1 3 2 4 5 6 7 8 9 18 17 16 15 19 20 10 11 12 13 14 24 23 22 21 25 26 27 28 LGATE1 VCCDR PHASE1 FB BOOT1 UGATE1 VPROG_OUT VCC SGND COMP ISEN1 PGNDS1 SYNC_OUT SLAVE_OK VID3 VID2 VID1 VID4 BOOT2 PGOOD UGATE2 PHASE2 LGATE2 PGND OSC / INH / FAULT ISEN2 PGNDS2 VID0 |
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