www.DataSheet4U.com
6-Bit, Programmable 2-/3-/4-Phase, Synchronous Buck Controller ADP3194
FEATURES
Selectable 2-, 3-, ...
www.DataSheet4U.com
6-Bit, Programmable 2-/3-/4-Phase, Synchronous Buck Controller ADP3194
FEATURES
Selectable 2-, 3-, or 4-phase operation Up to 1 MHz per phase ±9.5 mV worst-case differential sensing error over temperature Logic-level PWM outputs for interface to external high power drivers PWM Flex-ModeTM architecture for excellent load transient performance Active current balancing between all output phases Built-in power good/crowbar blanking supports OTF VID code changes 6-bit digitally programmable 0.8375 V to 1.6 V output Programmable short circuit protection with programmable latch-off delay
FUNCTIONAL BLOCK DIAGRAM
VCC 28 SHUNT REGULATOR UVLO SHUTDOWN AND BIAS OSCILLATOR SET RESET EN 27 PWM1 RAMPADJ 14 RT 13
ADP3194
EN 11 GND 19
CMP
DAC + 150mV CSREF CMP CURREN TBALANCING CIRCUIT RESET 2-/3-/4-PHASE DRIVER LOGIC RESET 26 PWM2
CMP
25 PWM3
DAC – 250mV CMP PWRGD 10 DELAY RESET CURRENT LIMIT 23 SW1 ILIMIT 15 EN 22 SW2 21 SW3 20 SW4 CURREN TLIMIT CIRCUIT SOFT START 17 CSSUM 16 CSREF 18 CSCOMP 24 PWM4
CROWBAR
APPLICATIONS
Desktop PC power supplies for Next-generation Intel® processors VRM modules Games consoles
DELAY 12
COMP 9
8 FB
PRECISION REFERENCE 7 FBRTN 1 2 3
VID DAC 4 5 6
06022-001
VID4 VID3 VID2 VID1 VID0 VID5
Figure 1. Functional Block Diagram
GENERAL DESCRIPTION
The ADP3194 1 is a highly efficient, multiphase, synchronous buck switching regulator controller optimized for converting a 5 V or 12 V main supply into the core supply
voltage required...