l6911b STMicroelectronics, l6911b Datasheet - Page 4

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

L6911B
PIN FUNCTION (continued)
ELECTRICAL CHARACTERISTICS
4/7
VCC SUPPLY CURRENT
POWER-ON
OSCILLATOR
REFERENCE and DAC
ERROR AMPLIFIER
GATE DRIVERS
PROTECTION
Symbol
N
20
R
R
I
I
I
GBW
UGATE
LGATE
OCSET
UGATE
I
LGATE
SR
I
OVP
I
V
CC
SS
osc
Name
RT
Supply current
Rising V
Falling V
Rising VOCSET Threshold
Free Running Frequency
Total Variation
Ramp Amplitude
DACOUT voltage Accuracy
DC Gain
Gain-Bandwidth Product
Slew Rate
Upper Gate Source
Upper Gate Sink
Lower Gate Source
Lower Gate Sink
Overvoltage Trip
(V
OCSET Current Source
OVP Sourcing Current
Soft Start Current
SEN
/DACOUT)
CC
CC
Oscillator Switching frequency pin. Connecting an external resistor from this pin to ground the
switching frequency is increased according to the equation:
Connecting the resistor from this pin and the Vcc the Switching frequency is reduced
according to the equation:
If the pin is not connected the switching frequency is 200kHz.
Parameter
Threshold
Threshold
UGATE and LGATE open
VOCSET = 4.5V
VOCSET = 4.5V
RT = open
R
R
RT = open
VID0, VID1, VID2, VID3 see
Table1
COMP = 10pF
V
V
I
V
I
V
V
LGATE
LGATE
BOOT
UGATE
CC
OCSET
SEN
T
T
to GND >6k ,
to V
f
f
S
S
= 12V, V
= 5.5V, V
= 200kHz −
- Vphase = 12V,
= 0.3A
= 0.3A
CC
200kHz +
Test Condition
= 6V
= 4.5VDC
= 12V > 200k
LGATE
OVP
Description
R
R
5
4
= 0V
= 6V
T
T
( K Ω)
(KΩ)
10
10
6
7
Min.
185
170
3.6
-15
0.6
1.2
60
-1
-
-
-
-
-
-
-
-
-
-
Typ.
1.26
200
115
200
1.9
1.5
88
15
10
10
1
2
5
1
-
-
-
-
Max.
215
120
230
4.6
15
1
3
2
-
-
-
-
-
-
-
-
-
MHz
Unit
V/ s
kHz
mA
mA
dB
%
%
%
V
V
V
V
A
A
A
A