13
LTC1622
TYPICAL APPLICATIONS
U
1
2
3
4
8
7
6
5
1
4
8
7
6
5
SENSE
I
TH
V
FB
V
IN
PDRV
GND
SYNC/
MODE
RUN/
SS
L1
3.3µH
R2
0.025
U1
V
OUT
1.8V
1.5A
V
IN
2.5V TO
8.5V
1622 TA01
R1
10K
C3
220pF
C1
47µF
16V
C2
220µF
6V
C4
560pF
R3
93.1k
LTC1622
+
+
R4
75k
C1: AVX TPSD476M016R0150
C2: AVX TPSD227M006R0100
L1: MURATA LQN6C3R3
R2: DALE WSL-1206 0.025
U1: INTERNATIONAL RECTIFIER
FETKY
TM
IRF7422D2
2
3
LTC1622 1.8V/1.5A Regulator with Burst Mode Operation Disabled
FETKY
is a trademark of International Rectifier Corporation.
LTC1622 2.5V/2A Regulator with Burst Mode Operation Enabled
D1
L1
4.7µH
R2
0.02
M1
R3
158k
V
OUT
2.5V
2A
V
IN
3.3V TO
8.5V
R4
75k
1622 TA02
C4
560pF
C1
47µF
16V
× 2
+
C2
150µF
6V
× 2
+
1
2
3
4
8
7
6
SENSE
I
TH
V
FB
V
IN
PDRV
GND
RUN/
SS
LTC1622
SYNC/
MODE
R1
10k
C3
220pF
5
C1: AVX TPSD476M016R0150
C2: SANYO POSCAP 6TPA47M
D1: MOTOROLA MBR320T3
L1: COILCRAFT D03316-472
M1: SILICONIX Si3443DV
R2: DALE WSL-2010 0.02
14
LTC1622
TYPICAL APPLICATIONS
U
LTC1622 2.5V/3A Regulator with External Frequency Synchronization
D1
L1
4.7µH
R2
0.01
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 0.01
Zeta Converter with Foldback Current Limit
R2
0.04
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 0.04
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
15
LTC1622
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTION
U
MS8 Package
8-Lead Plastic MSOP
(LTC DWG # 05-08-1660)
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
MSOP (MS8) 1098
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,
PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
0.021
± 0.006
(0.53 ± 0.015)
0
° – 6° TYP
SEATING
PLANE
0.007
(0.18)
0.040
± 0.006
(1.02 ± 0.15)
0.012
(0.30)
REF
0.006 ± 0.004
(0.15 ± 0.102)
0.034 ± 0.004
(0.86 ± 0.102)
0.0256
(0.65)
BSC
12
3
4
0.193 ± 0.006
(4.90 ± 0.15)
8
7
6
5
0.118 ± 0.004*
(3.00 ± 0.102)
0.118 ± 0.004**
(3.00 ± 0.102)
0.016 – 0.050
(0.406 – 1.270)
0.010 – 0.020
(0.254 – 0.508)
× 45°
0°– 8° TYP
0.008 – 0.010
(0.203 – 0.254)
SO8 1298
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
TYP
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
1
2
3
4
0.150 – 0.157**
(3.810 – 3.988)
8
7
6
5
0.189 – 0.197*
(4.801 – 5.004)
0.228 – 0.244
(5.791 – 6.197)
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*
**

LTC1622CMS8#TRPBF

Mfr. #:
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Low Volt Stepdn 3A Controller
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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