isl6237 Intersil Corporation, isl6237 Datasheet - Page 22

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

330µF
9m:
6.3V
C
C
11
1.5V/5A
OUT1
FB1 TIED TO GND = 5V
FB1 TIED TO VCC = 1.5V
10µF
C
L1: 3.3µH
VIN: 5.5V to 25V
10
FIGURE 63. ISL6237 TYPICAL SYSTEM REGULATOR APPLICATION CIRCUIT
22
Q3b
Q3a
SI4816BDY
VCC
VCC
3.3V
ON
ON
0.1µF
C
VCC
9
1µF
OFF
OFF
OFF
R
200k:
C
3
8
L
L
C
C
FREQUENCY-DEPENDENT COMPONENTS
1
2
2
11
1.5V/1.05V SMPS
FREQUENCY
SWITCHING
PVCC
VIN
BOOT1
UGATE1
PHASE1
LGATE1
OUT1
EN1
BYP
FB1
AGND
ILIM1
SKIP#
EN_LDO
TON
5V
ISL6237
ISL6237
PAD
VCC
1µF
C
LDOREFIN
5
3.3µH
2.7µH
330µF
330µF
UGATE2
PHASE2
LGATE2
REFIN2
BOOT2
200kHz/300kHz
PGND
OUT2
POK1
POK2
ILIM2
REF
EN2
LDO
t
ON
= VCC
200k:
R
5
0.22µF
C
VCC
4
0.1µF
C7
VCC
REFIN2: STATIC 0V TO 2.5V
REFIN2 TIED TO 3.3V = 1.05V
REFIN2 TIED TO VCC = 3.3V
Q1b
Q1a
LDOREFIN TIED TO GND = 5V
LDOREFIN TIED TO VCC = 3.3V
L2: 2.2µF
SI4816BDY
VCC
C
C
10µF
10
1
R
200k:
4
LDO
1.05V/5A
OUT2
VCC
C
4.7µF
6
C
C
330µF
4m:
6.3V
F
R
200k:
2
6
March 16, 2007
FN6418.1