LTC1622CMS8 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1622CMS8' PDF : 16 Pages View PDF
LTC1622
TYPICAL APPLICATION
R1
10k
C3
220pF
Small Footprint 3.3V/1A Regulator
1 SENSE–
8
VIN
2
7
ITH
PDRV
3
LTC1622
6
VFB
GND
4 RUN/
SS
SYNC/ 5
MODE
C4
560pF
R2
+
0.025Ω
VIN
3.3V TO
C1
8.5V
10µF
16V
CERAMIC
M1 L1
2.2µH
VOUT
3.3V
D1
R3 1A
232k
C2 +
47µF
6V
R4
75k
C1: MURATA CERAMIC GRM235Y5V106Z
C2: SANYO POSCAP 6TPA47M
D1: MOTOROLA MBRS120LT3
L1: COILCRAFT D01608C-222
M1: SILICONIX Si3443DY
R2: DALE WSL-2010 0.025Ω
1622 TA05
Boost Converter 3.3V/2.5A
C3
470pF
R1
33k
C5
150pF
1 SENSE–
8
VIN
2
ITH
7
PDRV
3
LTC1622
6
VFB
GND
4 RUN/
SS
SYNC/ 5
MODE
C4
0.1µF
+ C1
100µF
10V
Si6801DQ
C6
R2
0.1µF 0.015Ω
L1
4.6µH
M1
D1
VIN
3.3V
R3
105k +
R4
20k
VOUT
5V
2.5A
C2
220µF
10V
×2
C1, C2: SANYO POSCAP TPB SERIES M1: SILICONIX Si3442DV
D1: MOTOROLA MBRD835L
R2: DALE WS-L2512 0.015Ω
L1: SUMIDA CEP123-4R6
1622 TA06a
Efficiency vs Load Current
100
VIN = 3.5V
90
80
VIN = 4.2V
VIN = 6V
70
60
50
1
VOUT = 3.3V
RSENSE = 0.025Ω
10
100
LOAD CURRENT (mA)
1000
1622 TA05b
Efficiency vs Load Current With LTC1622
Configured as Boost Converter
100
VOUT = 5V
RSENSE = 0.015Ω
90
VIN = 3.3V
80
70
60
50
0.001
0.01
0.1
LOAD CURRENT (mA)
1
1622 TA06b
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COMMENTS
100% DC, 3.5V ≤ VIN ≤ 16V, HV Version Has 20VIN
High Frequency, Small Inductor, High Efficiency
24-Pin Narrow SSOP, 3.5V ≤ VIN ≤ 36V
Multiple Output Capability, 3.5V ≤ VIN ≤ 36V
Monolithic, MSOP, IOUT = 10µA
8-Pin N-Channel Drive, 3.5V ≤ VIN ≤ 36V
Monolithic, Constant Off-Time, 2.5V ≤ VIN ≤ 6V
Low Supply Voltage Range: 2.65V to 8V, 0.5A
Antiphase Drive, 3.5V ≤ VIN ≤ 36V, Protection
6-Lead SOT-23, 2.5V ≤ VIN ≤ 9.8V, 550kHz
Burst Mode Operation, Protection, 3.5V ≤ VIN ≤ 36V
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com
1622f LT/TP 0100 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1998
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