Datasheet

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