Rainbow Electronics MAX17008 - Manual (Page 16)

MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
16 ______________________________________________________________________________________
MAX17007A
MAX17008
6
X
TON1
AGND
R REFIN1
R
REFIN2
16
C VCC
1 μF
PGOOD2 NOT USED
IIN COMBINED MODE
ILIM2 FUNCTIONS AS
CCI OUTPUT IN
COMBINED MODE
EN2 MUST BE
GROUNDED
R9
10 Ω
R
TON1
220k Ω
R
NTC1
10k Ω
R4
3.01k Ω
C REF
2.2nF
C
CCI
220pF
R REFIN3
GND
PWR
PWR
PWR
AGND
PWR
AGND
2
ILIM1
3
ILIM2
(CCI)
5
SKIP
11
EN1
25
EN2
1
REF
R
REFIN1
= 80.6k Ω
R
REFIN2
= 121k Ω
R REFIN3 = 249k Ω 8
REFIN1
12
PGOOD1
24
PGOOD2
7
TON2
15
BST1
13
DH1
14
LX1
17
DL1
N
H1
N L1 20
PGND
10
CSH1
9
CSL1
28
FB2
4
V CC
18
V DD
REF
V
OUT
+3.3V
H = 1.0V
L = 1.2V
+5V
+5V
CONNECT TO 5V FOR
COMBINED MODE OPERATION
*LOWER INPUT VOLTAGES REQUIRE
ADDITIONAL INPUT CAPACITANCE.
V
IN
7V TO 20V
EP
POWER GROUND
ANALOG GROUND
R1
100k Ω
C
VDD
2.2 μF
C1
0.22
μF
C BST1
0.1 μF
PWR
D L1
C IN1
R3
1.5k
Ω
C OUT1
4 x 330 μF
12m Ω
L1
1 μH, 16A, 3mΩ
V
OUT1
1.2V/1.0V, 24A
ILIM
PIN
V
CC
OPEN
REF
GND
R7
10 Ω
C2
1nF
PWR
C OUT1-CER
10 x 10 μF
CERAMIC
R
NTC2
10k Ω
R6
3.01k Ω
PWR
AGND
21
BST2
23
DH2
22
LX2
19
DL2
N H2
N L2
26
CSH2
27
CSL2
V
IN
7V TO 20V
C3
0.22
μF
C BST2
0.1 μF
PWR
D L2
C IN2
R5
1.5k
Ω
L2
1 μH, 16A, 3mΩ
R8
10 Ω
C4
1nF
CURRENT
LIMIT
C CCI
(pF)
60mV
45mV
30mV
15mV 120
180
220
470
Figure 2. MAX17007A/MAX17008 Combined-Mode Standard Application Circuit