ISL6237 Datasheet, PDF (21/35 Pages) Intersil Corporation – High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers

ISL6237
VIN: 5.5V TO 25V
C₁₀
10µF
Q3a
SI4816BDY
OUT1 – PCI-e
1.25V/5A
L1: 3.3µH
C₁₁
Q3b
330µF
9mΩ
6.3V
C₈
1µF
C₉
0.1µF
5V
C₅
1µF
PVCC
VIN
VCC
LDO
LDOREFIN
BOOT1
BOOT2
UGATE1
UGATE2
PHASE1
PHASE2
LGATE1
LGATE2
OUT1
PGND
R1
7.87kΩ
VCC
5V
FB1 TIED TO GND = 5V
FB1 TIED TO VCC = 1.5V
R₂
10kΩ
R₃
200kΩ
EN1
BYP
FB1
AGND
ILIM1
ISL6237
OUT2
EN2
REFIN2
ILIM2
SKIP
EN_LDO
REF
NC
GND
C₄
0.22µF
C1
10µF
Q₁
IRF7821
OUT2-GFX
L2: 2.2µH _{TRACK REFIN2/10A}
Q₂
IRF7832
C₂
2 x 330µF
4mΩ
6.3V
VCC
R₅
200kΩ
C₇
0.1µF
REFIN2: STATIC 0V TO 2.5V
REFIN2 TIED TO 3.3V = 1.05V
REFIN2 TIED TO VCC = 3.3V
VCC
VCC
R₄
200kΩ
R₆
200kΩ
VCC
TON
PAD
POK1
POK2
FREQUENCY-DEPENDENT COMPONENTS
1.25V/1.05V SMPS
SWITCHING
FREQUENCY
t_ON = VCC
200kHz/300kHz
L₁
3.3µH
L₂
2.7µH
C₂
2 x 330µF
C₁₁
330µF
FIGURE 62. ISL6237 TYPICAL GFX APPLICATION CIRCUIT
21
FN6418.4
March 18, 2008