A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
RECOMMENDED HEXFET:
--------------------------
MOTOROLA PART# MTD3055VLT4
SAMSUNG CORNING CO. LTD
PART# SSR3055-TM
NOTE:
----
THE NET CONNECTING C60 TO C61
SHOULD BE CONNECTED DIRECTLY
TO PIN 3 OF THE LT1575 DUE TO
THE GROUND BOUNCE SENSIVITITY OF
THE LT1575 COMPENSATION PIN
TO VARY THE OUTPUT VOLTAGE, REPLACE
R40 WITH THE FOLLOWING VALUES TO
ACHIEVE THE VARIOUS OUTPUT
VOLTAGES:
R40 VOUT
------------------------------
150 2.7V
160 2.8V
170 2.9V
180 3.0V
POWER CONFIGURATION*
R50 R44 R42 R43 CORE PLL____________________________________________________
STUFF EMPTY STUFF EMPTY 3.3V 2.7V
EMPTY STUFF STUFF EMPTY 2.7V 2.7V
STUFF EMPTY EMPTY STUFF 3.3V 3.3V
EMPTY STUFF EMPTY STUFF 2.7V 3.3V *DEFAULT
* THE DEFAULT POWER CONFIGURATION
IS NOT REPRESENTED HERE
Intel740(TM) Graphics Accelerator Reference Card
2.1
Voltage Regulator
A
5 16Thursday, April 09, 1998
Title
Size Document Number Rev
Date: Sheet of
L_GATE
COMP1
FB1575
R_GATE
M_COMP1
VCC_REGULATED
VCC3
+12V
VCC_CORE
VCC_PLL
VCC_CORE
U7
LT1575
SHDN
1
VIN
2
GND
3
FB
4
COMP
5
GATE
6
INEG
7
IPOS
8
C53
1UF
C40
100UF
R36
4.7
C52
1UF
R41
120
R35
7.5K
C61
1000PF
C60
10PF
R40
150
Q2
HEXFET
DRN
2
GATE
1
SRC
3
R50
0
R44
0
R42
0
R43
0
C86
22UF
C75
10UF
C64
.1UF
C80
.1UF
C81
.01UF
C65
.01UF
C63
.1UF
C62
.1UF
C87
.01UF
C89
.01UF
C88
.1UF
C82
.01UF
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