LT1935
TYPICAL APPLICATIO S
U
8V, 16V and –8V TFT LCD Power Supply
16V
10mA
C3
1µF
D2B
D2A
C5
0.1µF
L1
2.2µH
V
IN
3.3V
8V
450mA
D1
V
SW
C1
4.7µF
R1
100k
IN
LT1935
C2
10µF
ON OFF
SHDN
FB
R2
18.7k
GND
C1: X5R OR X7R 6.3V
C2, C4, C5, C6: X5R OR X7R 10V
C3: X5R OR X7R 25V
D1: MBRM120 OR EQUIVALENT
D2, D3: BAT-54S OR EQUIVALENT
L1: SUMIDA CDRH4D28-2R2
C6
0.1µF
C4
D3A
1µF
D3B
–8V
10mA
1935 TA03
5V SEPIC Converter
C3
2.2µF
L1
4.7µH
D1
V
V
OUT
IN
3.2V TO 9V
5V
425mA, V >3.2V
IN
500mA, V >3.6V
IN
V
SW
C1
IN
R1
29.4k
550mA, V >4V
IN
47pF
4.7µF
LT1935
C2
47µF
ON OFF
SHDN
FB
L2
4.7µH
R2
10k
GND
C1, C3: X5R OR X7R 10V
C2: X5R OR X7R 6.3V
D1: ON SEMI MBRM120
L1, L2: SUMIDA CDRH4D18-4R7
1935 TA04
RELATED PARTS
PART NUMBER
DESCRIPTION
1.5A (I ), 1.25MHz, High Efficiency Step-Up DC/DC Converter
COMMENTS
LT1618
V : 1.6V to 18V, V
IN
: 35V, I : 1.8mA,
Q
: <1µA, MS, DFN Packages
SW
OUT(MAX)
I
SD
LT1930/LT1930A
LT1943
1A (I ), 1.2MHz/2.2MHz, High Efficiency Step-Up DC/DC Converter
V : 2.6V to 16V, V
: 34V, I : 4.2mA/5.5mA
Q
SW
IN
OUT(MAX)
I
: <1µA, ThinSOT Package
SD
Quad Output, 2.6A Buck, 2.6A Boost, 0.3A Boost,
0.4A Inverter 1.2MHz TFT DC/DC Converter
V : 4.5V to 22V, V
: 40V, I : 10mA,
IN
OUT(MAX) Q
I
: <35µA, TSSOP-28E Package
SD
LT1946/LT1946A
1.5A (I ), 1.2MHz/2.7MHz, High Efficiency Step-Up DC/DC Converter
V : 2.45V to 16V, V
: 34V, I : 3.2mA,
SW
IN
OUT(MAX) Q
I
: <1µA, MS8 Package
SD
LTC3400/LTC3400B 600mA (I ), 1.2MHz, Synchronous Step-Up DC/DC Converter
V : 0.85V to 5V, V
: 5V, I : 19µA/300µA
SW
IN
OUT(MAX) Q
I
: <1µA, ThinSOT Package
SD
LTC3401/LT3402
LTC3425
1A/2A(I ), 3MHz, Synchronous Step-Up DC/DC Converter
V : 0.5V to 5V, V
: 6V, I : 38µA,
SW
IN
OUT(MAX) Q
I
: <1µA, MS Package
SD
5A (I ), 8MHz, Multi-Phase Synchronous Step-Up DC/DC Converter
V : 0.5V to 4.5V, V
: 5.25V, I : 12µA,
OUT(MAX) Q
SW
IN
I
: <1µA, QFN Package
SD
LT3436
3A (I ), 1MHz, 34V Step-Up DC/DC Converter
V : 3V to 25V, V
: 34V, I : 0.9mA,
SW
IN
OUT(MAX) Q
I
: <6µA, TSSOP-16E Package
SD
LT3467/LT3467A
1.1A (I ), 1.3MHz/2.1MHz, High Efficiency Step-Up DC/DC Converter
V : 2.6V to 16V, V
: 40V, I : 1.2mA,
SW
IN
OUT(MAX) Q
I
: <1µA, ThinSOT Package
SD
1935f
LT/TP 0604 1K • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
8
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© LINEAR TECHNOLOGY CORPORATION 2004
Linear Systems [ Linear Systems ]
