ISL6236A Datasheet, PDF (21/37 Pages) Intersil Corporation – High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers

ISL6236A
VIN: 5.5V TO 25V
C₈
1µF
C₁₀
10µF
Q3a
SI4816BDY
OUT1 – PCI-e
1.25V/5A
L₁: 3.3µH
C₉
0.1µF
C₁₁
330µF
9mΩ
6.3V
Q3b
R₁
7.87kΩ
VCC
5V
FB1 TIED TO GND = 5V
FB1 TIED TO VCC = 1.5V
R₂
10kΩ
R₃
200kΩ
GND
5V
C₅
1µF
PVCC
VIN
VCC
LDO
LDOREFIN
BOOT1
BOOT2
UGATE1
UGATE2
PHASE1
PHASE2
LGATE1
LGATE2
OUT1
PGND
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
EN1
OUT2
BYP
FB1
AGND
ISL6236A EN2
REFIN2
ILIM1
ILIM2
SKIP
EN LDO
VREF3
REF
VCC
2 BITS
REFIN2: DYNAMIC 0V TO 2.5V ^DAC
REFIN2 TIED TO VREF3 = 1.05V
REFIN2 TIED TO VCC = 3.3V +
+
R₅
200kΩ
-
DROOP
+
C₃
OPEN
VCC
VCC
C₇
0.1µF
R₄
200kΩ
R₆
200kΩ
VCC
VCC
SECFB
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 66. ISL6236A TYPICAL DYNAMIC GFX APPLICATION CIRCUIT
21
FN6453.3
March 18, 2008