E-L6919ETR STMicroelectronics

L6919E 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT 2 PHASE OPERATION WITH SYNCRHONOUS RECTIFIER CONTROL ULTRA FAST LOAD TRANSIENT RESPONSE INTEGRATED HIGH CURRENT GATE DRIVERS: UP TO 2A GATE CURRENT SO-28 TTL-COMPATIBLE 5 BIT PROGRAMMABLE ORDERING NUMBERS:L6919E OUTPUT FROM 0.800V TO 1.550V WITH L6919ETR 25mV STEPS DYNAMIC VID MANAGEMENT DESCRIPTION 0.6% OUTPUT VOLTAGE ACCURACY The device is a power supply controller specifically 10% ACTIVE CURRENT SHARING ACCURACY designed to provide a high performance DC/DC DIGITAL 2048 STEP SOFT-START conversion for high current microprocessors. The OVERVOLTAGE PROTECTION device implements a dual-phase step-down con- OVERCURRENT PROTECTION REALIZED troller with a 180 phase-shift between each USING THE LOWER MOSFET S R OR A dsON phase. A precise 5-bit digital to analog converter SENSE RESISTOR (DAC) allows adjusting the output voltage from OSCILLATOR EXTERNALLY ADJUSTABLE 0.800V to 1.550V with 25mV binary steps manag- AND INTERNALLY FIXED AT 200kHz ing On-The-Fly VID code changes. POWER GOOD OUTPUT AND INHIBIT The high precision internal reference assures the FUNCTION selected output voltage to be within 0.6%. The REMOTE SENSE BUFFER high peak current gate drive affords to have fast PACKAGE: SO-28 switching to the external power mos providing low switching losses. APPLICATIONS The device assures a fast protection against load POWER SUPPLY FOR SERVERS AND over current and load over/under voltage. An inter- WORKSTATIONS nal crowbar is provided turning on the low side POWER SUPPLY FOR HIGH CURRENT mosfet if an over-voltage is detected. In case of MICROPROCESSORS over-current, the system works in Constant Cur- DISTRIBUTED POWER SUPPLY rent mode. BLOCK DIAGRAM OSOSCC / / IINNHH SSGGNN DD VVCCDCCD RR BOBO OO TT 11 HSHS PPGGOODOOD UU GAGA TT EE11 PWPW MM11 PHPHAASS EE11 CHCH11 LSLS LGLGAATT EE11 OCOCPP DIDIGGIITTAALL VCVCCC SSOOFFTT--STSTARARTT ISISEE NN11 VCVCCC DDRR CURCURCURRERERENNNTTT TOTO TATALL PGPGNN DDS1S1 CUCURR RREENN TT REREREAAA DDDIIINNNGGG VIVIDD 44 PGPGNN DD VIVIDD 33 CURCURCUR RERERENNN TTT PGPGNN DDS2S2 VIVIDD 22 DADACC REREREAAA DDDIIINNN GGG VIVIDD 11 CHCH 22 O OCC PP ISISEE NN22 VIVIDD 00 CHCH11 O OCCPP LSLS LGLGAATT EE22 CHCH22 OCOCPP 32k32k 3232kk II FBFB FBFB GG PHPHAASS EE22 3232kk PWPW MM22 FBFB RR HSHS UGUGATATEE22 REREMMOOTTEE 32k32k BUBU FFEFFE RR VcVc cc ERERRR OORR BOBO OO TT 22 AMAMPPLL IIFFIIEERR VSVS EENN FBFB COCO MM PP VcVccc September 2003 1/33 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) LLOOGGIIC AC ANND D 2 P2 PHHAASSEE PRPROOTTECECTTIIOONNSS OSOSCC IILL LLAATTOORR CURCUR RERENN TT AVAVGG CCUU RRERRENTNT CUCU RRRR EENN TT COCORRRR EECC TTIIOONN COCORR RR EECC TTII OONN LOLOLOGGGIIICCC P P PWWWMMM LOLOLOGGG IIICCC P P PWWW MMM ADADADAPAPAPTTT IIIVVV EEE A A A NNN TTT III ADADADAAA PPPTTTIIIVEVEVE A A A NNNTTTIII CROCROCROSSSSSS CO CO CONNNDDDUUUCCCTTTIIIOOONNN CRCRCROOOSSSSSS C C COOONDNDNDUUUCCCTTTIIIOOONNN L6919E ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit Vcc, V to PGND 15 V CCDR V -V Boot Voltage 15 V BOOT PHASE V -V 15 V UGATE1 PHASE1 V -V UGATE2 PHASE2 LGATE1, PHASE1, LGATE2, PHASE2 to PGND -0.3 to Vcc+0.3 V VID0 to VID4 -0.3 to 5 V All other pins to PGND -0.3 to 7 V V Sustainable Peak Voltage t < 20ns 600kHz 26 V phase UGATEx Pin Maximum Withstanding Voltage Range 1000 V Test Condition: CDF-AEC-Q100-002Human Body Model OTHER PINS 2000 V Acceptance Criteria: Normal Performance THERMAL DATA Symbol Parameter Value Unit R Thermal Resistance Junction to Ambient 60 C/W th j-amb T Maximum junction temperature 150 C max T Storage temperature range -40 to 150 C storage T Junction Temperature Range 0 to 125 C j P Max power dissipation at T = 25C 2 W MAX amb PIN CONNECTION LGATE1 PGND 1 28 VCCDR LGATE2 2 27 PHASE1 PHASE2 3 26 UGATE1 UGATE2 4 25 BOOT1 BOOT2 5 24 VCC PGOOD 6 23 SGND VID4 7 22 COMP VID3 8 21 FB VID2 9 20 VSEN VID1 10 19 FBR VID0 11 18 FBG OSC / INH / FAULT 12 17 ISEN1 ISEN2 13 16 PGNDS1 PGNDS 14 15 2/33 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) L6919E