ISL6224 Datasheet, PDF (11/13 Pages) Intersil Corporation – Single Output Mobile-Friendly PWM Controller

ISL6224
ISL6224 DC-DC Converter Application Circuits
Figure 5 shows an application circuit of a DC/DC converter
for a notebook PC. The power supply provides +V2_5S from
either +4V–24V_DC battery voltage or system +5V bus. For
detailed information on the circuit, including a bill of materials
and circuit board description, see Application Note AN9983.
Also see Intersil’s web site (http://www.intersil.com) for the
latest information.
C2
1µF
+ _C1
56µF
+5.6-24V_IN
GND
R2
OCSET
TBD
FCCM
EN
C4
0.015µF
SOFT
PGOOD
VIN
4
1
16
ISL6224
3
7
2
8
GND
VCC
11
BOOT
15
CR1
14 ^UGATE
PHASE
13
ISEN
12
Risen
TBD
LGATE
10
9 ^PGND
VSEN
6
VOUT
5
+ _C3
33µF
+5.0V_CC
Q1
1/2 FDS6912A
C6
0.1µF
L1 6.4µH
+V2_5S
(3A)
C5 ₊
Q2
330µF
2/2 FDS6912A
R3
C6
R4
FIGURE 5. APPLICATION CIRCUIT FOR ONE-STEP CONVERSION (MODE 1)
11
FN9042.7
December 28, 2004