Quick-PWM Master Controllers for Voltage-
Positioned CPU Core Power Supplies (IMVP-IV)
V+
ON-TIME
TON
COMPUTE
MAX1907A
MAX1981A
ONE-SHOT
CSP
Q TRIG
CSN
MINIMUM
ON-TIME
OFF-TIME
REF
Q TRIG
(2V)
ONE-SHOT
S
Q
ILIM
R
S
Q
R
CC
Gm
FAULT
PROTECTION
REF
0.9 x REF
Gm
1.1 x REF
CLKEN
IMVPOK
POWER-GOOD
LOGIC
SKIP-MODE
LOGIC
R-2R
DIVIDER
INTERNAL MULTIPLEXERS
AND SLEW-RATE CONTROL
SHDN
VCC
REF
GND
BST
DH
LX
VDD
DL
PGND
POS
NEG
FB
OAIN+
OAIN-
TIME
Figure 2. MAX1907A/MAX1981A Functional Diagram
20 ______________________________________________________________________________________