ISL6237 Datasheet, PDF (22/35 Pages) Intersil Corporation – High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers

ISL6237
VIN: 5.5V TO 25V
C₈
1µF
C₁₀
10µF
SI4816BDY
Q3a
OUT1
1.5V/5A
L1: 3.3µH
C₉
0.1µF
C₁₁
330µF
9mΩ
6.3V
Q3b
VCC
3.3V
VCC
FB1 TIED TO GND = 5V
FB1 TIED TO VCC = 1.5V
R₃
200kΩ
5V
C₅
1µF
PVCC
VIN
BOOT1
VCC
LDO
LDOREFIN
BOOT2
UGATE1
UGATE2
PHASE1
PHASE2
LGATE1
LGATE2
OUT1
PGND
EN1
OUT2
BYP ISL6237 _EN2
FB1
AGND
REFIN2
ILIM1
ILIM2
ON
OFF
VCC
SKIP
EN_LDO
REF
TON
PAD
POK1
POK2
VCC
C₄
0.22µF
LDOREFIN TIED TO GND = 5V
LDOREFIN TIED TO VCC = 3.3V
LDO
C₁
10 µF
C₆
4.7 µF
Q1a
OUT2
L2: 2.2µF _1.05V/5A
Q1b ^SI4816BDY
C₂
330µF
4mΩ
6.3V
VCC
R₅
200kΩ
REFIN2: STATIC 0V TO 2.5V
REFIN2 TIED TO 3.3V = 1.05V
REFIN2 TIED TO VCC = 3.3V
VCC
VCC
C7
0.1µF
R₄
200kΩ
R₆
200kΩ
FREQUENCY-DEPENDENT COMPONENTS
1.5V/1.05V SMPS
SWITCHING
FREQUENCY
t_ON = VCC
200kHz/300kHz
L₁
3.3µH
L₂
2.7µH
C₂
330µF
C₁₁
330µF
FIGURE 63. ISL6237 TYPICAL SYSTEM REGULATOR APPLICATION CIRCUIT
I
22
FN6418.4
March 18, 2008