L6911B Datasheet, PDF (1/7 Pages) STMicroelectronics – 5 BIT PROGRAMMABLE POWER SUPPLY CONTROLLER FOR PENTIUM II PROCESSOR

®
L6911B
5 BIT PROGRAMMABLE POWER SUPPLY
CONTROLLER FOR PENTIUM II PROCESSOR
OPERATING SUPPLY VOLTAGE FROM 5V
TO 12V
TTL-COMPATIBLE 5BIT PROGRAMMABLE
OUTPUT FROM:
-1.3V TO 2.05V WITH 0.05V BINARY STEPS
-2.1V TO 3.5V WITH 0.1V BINARY STEPS
VOLTAGE MODE PWM CONTROL
EXCELLENT OUTPUT ACCURACY +/-1%
OVERLINE, AND TEMPERATURE VARIATIONS
HIGH PRECISION INTERNAL REFERENCE
DIGITALLY TRIMMED
VERY FAST LOAD TRANSIENT 0% TO 100%
DUTY CYCLE
POWER GOOD OUTPUT
OVERVOLTAGE PROTECTION
OVERCURRENT PROTECTION REALISED
USING THE MOSFET’s RDSon
OPERATING FREQUENCY FROM 50KHz TO
1MHz
MEETS INTEL PENTIUM II SPECIFICATION
DISABLE FUNCTION
APPLICATION CIRCUIT
Vin 5V/12V
V_CC 5V/12V
SO20
Applications
POWER SUPPLY FOR ADVANCED MICRO-
PROCESSOR SUPPLIES
POWER SUPPLY FOR PENTIUM II INTEL
PROCESSORS
DESCRIPTION
The L6911B is a power supply controller specifi-
cally designed to provide a high performance
DC/DC conversion for Pentium II Microproces-
sors. A precise 5 bit digital to analog converter
April 1999
18
VCC
20
OSC
OVP
19
VD0
4
VD1
5
VD2
6
VD3
7
VD4
8
SS
3
PGOOD
12
OCSET
2
15
14
BOOT
UGATE
13
PHASE
17
LGATE
16
PGND
11
GND
1
VSEN
VFB
10
COMP
9
Vo
1.3V to 3.5V
D98IN956B
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