isl6236a Intersil Corporation, isl6236a Datasheet - Page 23

• Manufacturer Part Number: isl6236a
• Description: High-efficiency, Quad-output, Main Power Supply Controllers For Notebook Computers
• Manufacturer: Intersil Corporation

330µF
FIGURE 68. ISL6236A TYPICAL LOW INPUT VOLTAGE SYSTEM REGULATOR APPLICATION CIRCUIT WITHOUT CHARGE PUMP
9mΩ
6.3V
C
C
11
1.5V/5A
OUT1
FB1 TIED TO GND = 5V
FB1 TIED TO VCC = 1.5V
C
10µF
L
*NOTE: To prevent noise in high loading conditions, place a 10Ω resistor between VIN and PVCC. Additional
10
VIN: 4.5V to 5.5V*
electrolytic bulk decoupling can also be used for this purpose
1
: 3.3µH
Q3b
Q3a
23
SI4816BDY
VCC
VCC
3.3V
ON
ON
0.1µF
C
VCC
VCC
9
OFF
OFF
OFF
R
200kΩ
1µF
C
3
8
L
L
C
C
FREQUENCY-DEPENDENT COMPONENTS
1
2
2
11
PVCC
VIN
BOOT1
UGATE1
PHASE1
LGATE1
OUT1
EN1
BYP
FB1
AGND
ILIM1
SKIP#
EN LDO
SECFB
TON
1.5V/1.05V SMPS
FREQUENCY
SWITCHING
10Ω
R
ISL6236A
7
PAD
VCC
ISL6236A
LDOREFIN
1µF
C
UGATE2
PHASE2
LGATE2
5
REFIN2
BOOT2
VREF3
PGND
OUT2
POK1
POK2
ILIM2
REF
LDO
EN2
3.3µH
2.7µH
330µF
330µF
200kHz/300kHz
t
ON
200kΩ
R
= VCC
5
0.22µF
C
VCC
4
0.01µF
0.1µF
C
C
VCC
VREF3
3
7
Q1a
Q1b
REFIN2: DYNAMIC 0 TO 2.5V
REFIN2 TIED TO VREF3 = 1.05V
REFIN2 TIED TO VCC = 3.3V
LDOREFIN TIED TO GND = 5V
LDOREFIN TIED TO VCC = 3.3V
L
SI4816BDY
2
VCC
: 2.2µF
C
C
10µF
10
1
200kΩ
R
4
LDO
1.05V/5A
OUT2
VCC
C
4.7µF
6
C
330µF
4mΩ
6.3V
200kΩ
F
R
2
6
June 28, 2007
FN6453.1