isl6237 Intersil Corporation, isl6237 Datasheet - Page 21

• Manufacturer Part Number: isl6237
• Description: High-efficiency, Quad-output, Main Power Supply Controllers For Notebook Computers
• Manufacturer: Intersil Corporation

330µF
9m:
6.3V
OUT1 – PCI-e
C
C
1.25V/5A
11
C
10µF
10
VIN: 5.5V to 25V
L1: 3.3µH
SI4816BDY
7.87k:
10k:
R1
R
2
FB1 TIED TO GND = 5V
FB1 TIED TO VCC = 1.5V
21
Q3a
Q3b
VCC
VCC
FIGURE 62. ISL6237 TYPICAL GFX APPLICATION CIRCUIT
5V
0.1µF
C
9
1µF
R
200k:
C
3
L
L
C
C
8
FREQUENCY-DEPENDENT COMPONENTS
1
2
1.25V/1.05V SMPS
2
11
FREQUENCY
SWITCHING
PVCC
VIN
BOOT1
UGATE1
PHASE1
LGATE1
OUT1
EN1
BYP
FB1
AGND
ILIM1
SKIP#
EN_LDO
TON
5V
ISL6237
ISL6237
VCC
PAD
1µF
C
5
3.3µH
2.7µH
2 x 330µF
330µF
LDOREFIN
200kHz/300kHz
UGATE2
PHASE2
LGATE2
REFIN2
BOOT2
t
ON
PGND
OUT2
POK1
POK2
ILIM2
LDO
REF
EN2
= VCC
200k:
R
5
C
0.22µF
NC
GND
4
0.1µF
C
VCC
7
Q
IRF7832
Q
IRF7821
2
1
L2: 2.2µH
REFIN2: STATIC 0V TO 2.5V
REFIN2 TIED TO 3.3V = 1.05V
REFIN2 TIED TO VCC = 3.3V
VCC
C1
C1
10
10µF
R
200k:
4
TRACK REFIN2/10A
OUT2-GFX
VCC
C
C
2 x 330µF
4m:
6.3V
R
200k:
2
6
March 16, 2007
FN6418.1