LTC1622
TYPICAL APPLICATIONS
U
LTC1622 2.5V/3A Regulator with External Frequency Synchronization
V
IN
3.3V TO
8.5V
C1
+
+
R2
47µF
16V
× 2
1
2
3
4
8
7
6
5
0.01Ω
–
SENSE
V
IN
I
TH
PDRV
LTC1622
GND
M1
L1
4.7µH
D1
V
OUT
V
FB
R1
10k
2.5V
3A
R3
C2
SYNC/
MODE
RUN/
SS
158k
100µF
6.3V
× 2
C3
220pF
650kHz
1.5V
R4
75k
C4
560pF
P-P
1622 TA03
C1: AVX TPSD476M016R0150
C2: AVX TPSD107M010R0065
D1: MOTOROLA MBR320T3
L1: COILCRAFT D03316-472
M1: SILICONIX Si3443DV
R2: DALE WSL-2512 0.01Ω
Zeta Converter with Foldback Current Limit
V
IN
2.5V TO
8.5V
C1
+
R2
D2
1N4818
47µF
16V
× 2
1
2
3
4
8
7
6
5
–
0.04Ω
SENSE
V
IN
I
PDRV
LTC1622
TH
Si3441DV
L1B
6.2µH
V
OUT
V
GND
FB
3.3V
+
R1
47k
+
C2
R3
D1
47µF
16V
100µF
RUN/
SS
SYNC/
MODE
232k
L1A
6.2µH
10V
C3
470pF
C4
0.1µF
R4
75k
1622 TA04
V
I
IN
OUT(MAX)
(A)
C1: AVX TPSD476M016R0150
C2: AVX TPSD107M010R0080
D1: MOTOROLA MBRS320T3
2
3
(V)
2.5
3.3
5.0
6.0
8.4
0.45
0.70
0.95
1.00
1.05
L1A
L1B
TOP VIEW
L1A, L1B: BH ELECTRONICS BH511-1012
4
1
R2: DALE WSL-1206 0.04Ω
•
14
Linear [ Linear ]
