MAX1981A Maxim Integrated Products, MAX1981A Datasheet - Page 18

• Manufacturer Part Number: MAX1981A
• Description: (MAX1907A / MAX1981A) Quick-PWM Master Controllers
• Manufacturer: Maxim Integrated Products

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Quick-PWM Master Controllers for Voltage-
Positioned CPU Core Power Supplies (IMVP-IV)
Figure 1A. Standard Multiphase Application Circuit (continued)
18
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* LOWER INPUT VOLTAGES
REQUIRE ADDITIONAL
INPUT CAPACITANCE
MAX1907A/MAX1981A
POWER GROUND
ANALOG GROUND
(MASTER)
ANALOG GROUND
(SLAVE)
OUTPUT
(MASTER)
(SEE FIGURE 1)
CONNECT TO
(300kHz)
100pF
FLOAT
REF
C8
0.22μF
C
270pF
COMP
C7
(MASTER)
(MASTER)
(MASTER)
49.9kΩ
D3
200kΩ
10Ω
R
R16
R17
DDO
R15
1%
1%
ILIM
20kΩ
COMP
DL
V
POL
TON
COMP
ILIM
DD
LIMIT
TRIG
CC
MAX1980
PGND
GND
CM+
CM-
CS+
V
BST
CS-
DH
DD
V+
LX
DL
D2
C
0.1μF
C9
4700pF
C10
4700pF
BST(S)
C6
1μF
200Ω
200Ω
200Ω
200Ω
R18
R19
R20
R21
N
N
H(S)
L(S)
C
(3) 10μF 25V CERAMIC
IN
5V BIAS
SUPPLY
L
MAX1907A/MAX1981A
S
(SEE FIGURE 1)
CONNECT TO
INPUT*
8V TO 24V
R
CS
OUTPUT