l6911b STMicroelectronics, l6911b Datasheet - Page 2

• Manufacturer Part Number: l6911b
• Description: 5 Bit Programmable Power Supply Controller For Pentium Ii Processor
• Manufacturer: STMicroelectronics

L6911B
DESCRIPTION (continued)
(DAC) allows to adjust the output voltage from
1.3V to 2.05V with 0.05V binary steps and from
2.1V to 3.5V with 0.1V binary steps. The high pre-
cision internal reference, digitally trimmed, as-
sures the selected output voltage to within +/-1%.
Thanks to the window comparator system, the de-
vice provides excellent load transient perform-
ance. The high peak current gate drive affords to
ABSOLUTE MAXIMUM RATINGS
BLOCK DIAGRAM
THERMAL DATA
RECOMMENDED OPERATING CONDITION
2/7
V
BOOT
Symbol
Symbol
Symbol
R
T
T
V
thj-amb
V
T
T
-V
max
amb
CC
stg
CC
J
PHASE
V
Boot Voltage
Input, Output or I/O Voltage
Thermal Resistance Junction to Ambient
Maximum Junction Temperature
Storage Temperature Range
V
Ambient Temperature Range
Junction Temperature Range
CC
CC
to PGND
to PGND
PGOOD
D98IN957A
OVP
VD0
VD1
VD2
VD3
VD4
SS
RT
D/A
MONITOR and
PROTECTION
+
-
COMP
V
VCC
CC
OSC
E/A
12V
Parameter
Parameter
Parameter
+
-
OCSET
PWM
have fast switching to the external power mos,
performing an high efficiency. The L6911B as-
sures a fast protection against load overvoltage
and load overcurrent. An external SCR is trig-
gered to crowbar the input supply in case of over-
voltage. In case of output short circuit the soft
start capacitor is discharged and the system
works in hiccup mode.
BOOT
UGATE
PHASE
LGATE
PGND
GND
VSEN
VFB
Vin 5V
5V 10%/12V 10%
-0.3 to V
1.8V to 3.5V
-65 to 150
Vo
0 to 125
0 to 70
Value
Value
Value
110
150
15
15
CC
+0.3
Unit
Unit
Unit
C/W
V
V
V
V
C
C
C
C