ISL6525_04 Datasheet, PDF (10/11 Pages) Intersil Corporation – Buck and Synchronous-Rectifier Pulse-Width Modulator (PWM) Controller

ISL6525
12VCC
VIN
C_IN
1µF
330µF/25V
0.1µF
1µF
10K
6
SS 3
RT ₁
V _OUT
C_DELAY
1000pF
VCC
PGOOD _DELAY
13 7
MONITOR AND
PROTECTION
14
2 OCSET
10 BOOT
4.99K
SPARE
OSC
U1
REF ^ISL6525
9 UGATE Q1
8 ^PHASE
13 ^VCC
-
FB 5
+
-
+
12 ^LGATE
Q2
11 PGND
4
6
SPARE
COMP
GND
33pF
20K
6.8nF
C16
1K
SPARE _SPARE
1N4148
0.1µF
L1
C_OUT
1000µF
Component Selection Notes:
CIN - 330µF 25W VDC, Rubycon ZA series or equivalent
COUT - 1000µF 6.3W VDC, Rubycon ZA series or equivalent
L1 - Core: Micrometals T44-52; Winding: 12 Turns of 19AWG
Q1 - Intersil MOSFET; HUF76121D
Q2 - Intersil MOSFET; HUF76129D
FIGURE 11. DC-DC CONVERTER APPLICATION CIRCUIT
V_OUT
10
FN4998.3
December 27, 2004