MAX1981A Maxim Integrated Products, MAX1981A Datasheet - Page 17

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

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Figure 1. Standard Multiphase Application Circuit
Positioned CPU Core Power Supplies (IMVP-IV)
ON
100kΩ
OFF
R14
Quick-PWM Master Controllers for Voltage-
SUSPEND INPUTS
(4-LEVEL LOGIC)
(4-LEVEL LOGIC)
200kΩ
100kΩ
100pF
R10
BOOT INPUTS
C3
R13
______________________________________________________________________________________
DAC INPUTS
0.22μF
CREF
(1V LOGIC)
CONTROL
MODE
100kΩ
(300kHz)
R12
FLOAT
49.9kΩ
301kΩ
1%
1%
1μF
R8
R9
10Ω
C2
270pF
R11
C
CC
CONNECT TO SLAVE
CONTROLLER FOR
MULTIPHASE OPERATION
(SEE FIGURE 1A)
V
SYSPOK
CLKEN
IMVPOK
D0
D1
D2
D3
D4
D5
S0
S1
S2
B0
B1
B2
SUS
DPSLP
SHDN
TON
CC
REF
ILIM
DDO
CC
MAX1907A
MAX1981A
OAIN+
PGND
OAIN-
TIME
GND
CSN
CSP
NEG
POS
V
BST
DH
DL
DD
V+
LX
FB
R
28kΩ
TIME
C11
1000pF
D1
R1
1.5kΩ
1%
R6
2.74kΩ
1%
R7
100kΩ
1%
C
0.1μF
100pF
BST(M)
C5
200Ω
R23
200Ω
R22
C1
1μF
N
N
C
(3) 10μF 25V CERAMIC
H(M)
L(M)
IN
5V BIAS
SUPPLY
MULTIPHASE OPERATION
CONNECT TO SLAVE
CONTROLLER FOR
(SEE FIGURE 1A)
L
M
* LOWER INPUT VOLTAGES
R2
750Ω
REQUIRE ADDITIONAL
INPUT CAPACITANCE
R4
750Ω
INPUT*
8V TO 24V
R
470pF
CM
C4
POWER GROUND
ANALOG GROUND
(MASTER)
ANALOG GROUND
(SLAVE)
R3
1.0kΩ
1%
R5
1.0kΩ
1%
OUTPUT
C
OUT
17