Datasheet

19
LTC1645
1645fa
Q2
1/2 Si4920DY
Q1
1/2 Si4920DY
10Ω
10Ω
2.67k 1%
3.16k 1%
1.87k 1%
0.047µF 25V
1µF
V
REGOUT
1µF
4700pF
0.1µF
2.4µH
CDRH1272R4
0.33µF
1
12
2
3
8
9
6
5
11
7
10
4
ON FAULT
TIMER GND
1314
SENSE1
V
CC1
GATE2
GATE1
V
CC2
V
IN
5V
V
OUT1
3.3V 2.5A
V
OUT2
5V 2.5A
LTC1645
(14-LEAD)
COMP
+
COMPOUT
FB
SENSE2
ON/OFF
FAULT
1645 F21
0.047µF 25V
RESET
+
C
LOAD1
C
LOAD2
+
1500µF 6.3V × 2
+
130k 1% 162k 1%
22k
10k
51Ω
1Ω
MBRS130T3
Si4410DY Si4410DY
MBR0530T1
10k
1.15k 1%
RESET
R
SENSE2
*
0.01Ω
R
SENSE1
*
0.01Ω
R1
16.5k
1%
R2
16.9k
1%
*LRF1206-01-R010-J (IRC)
0.1µF
15µF
10V
1500µF 6.3V × 3
1µF
4700pF
270pF
680pF
2 1 4 3
7 8 5 6
PV
CC2
G2 SHDN COMP
PV
CC1
G1
FB
GND
LTC1430ACS8
+
+
Figure 21. Switching Regulator Supply Sequencing
APPLICATIO S I FOR ATIO
WUUU