Datasheet
8
LT1935
1935f
LT/TP 0604 1K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2004
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
RELATED PARTS
GND
V
IN
SW
SHDN FB
V
IN
3.3V
D1
D2A
D3A
D3B
D2B
L1
2.2µH
R1
100k
LT1935
1935 TA03
C2
10µF
C1
4.7µF
R2
18.7k
8V
450mA
16V
10mA
–8V
10mA
ON OFF
C5
0.1µF
C6
0.1µF
C3
1µF
C4
1µF
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
GND
V
IN
SW
SHDN FB
V
IN
3.2V TO 9V
D1
L1
4.7µH
R1
29.4k
LT1935
1935 TA04
47pF
C2
47µF
C3
2.2µF
C1
4.7µF
L2
4.7µH
R2
10k
V
OUT
5V
425mA, V
IN
>3.2V
500mA, V
IN
>3.6V
550mA, V
IN
>4V
C1, C3: X5R OR X7R 10V
C2: X5R OR X7R 6.3V
ON OFF
D1: ON SEMI MBRM120
L1, L2: SUMIDA CDRH4D18-4R7
8V, 16V and –8V TFT LCD Power Supply
5V SEPIC Converter
TYPICAL APPLICATIO S
U
PART NUMBER DESCRIPTION COMMENTS
LT1618 1.5A (I
SW
), 1.25MHz, High Efficiency Step-Up DC/DC Converter V
IN
: 1.6V to 18V, V
OUT(MAX)
: 35V, I
Q
: 1.8mA,
I
SD
: <1µA, MS, DFN Packages
LT1930/LT1930A 1A (I
SW
), 1.2MHz/2.2MHz, High Efficiency Step-Up DC/DC Converter V
IN
: 2.6V to 16V, V
OUT(MAX)
: 34V, I
Q
: 4.2mA/5.5mA
I
SD
: <1µA, ThinSOT Package
LT1943 Quad Output, 2.6A Buck, 2.6A Boost, 0.3A Boost, V
IN
: 4.5V to 22V, V
OUT(MAX)
: 40V, I
Q
: 10mA,
0.4A Inverter 1.2MHz TFT DC/DC Converter I
SD
: <35µA, TSSOP-28E Package
LT1946/LT1946A 1.5A (I
SW
), 1.2MHz/2.7MHz, High Efficiency Step-Up DC/DC Converter V
IN
: 2.45V to 16V, V
OUT(MAX)
: 34V, I
Q
: 3.2mA,
I
SD
: <1µA, MS8 Package
LTC3400/LTC3400B 600mA (I
SW
), 1.2MHz, Synchronous Step-Up DC/DC Converter V
IN
: 0.85V to 5V, V
OUT(MAX)
: 5V, I
Q
: 19µA/300µA
I
SD
: <1µA, ThinSOT Package
LTC3401/LT3402 1A/2A(I
SW
), 3MHz, Synchronous Step-Up DC/DC Converter V
IN
: 0.5V to 5V, V
OUT(MAX)
: 6V, I
Q
: 38µA,
I
SD
: <1µA, MS Package
LTC3425 5A (I
SW
), 8MHz, Multi-Phase Synchronous Step-Up DC/DC Converter V
IN
: 0.5V to 4.5V, V
OUT(MAX)
: 5.25V, I
Q
: 12µA,
I
SD
: <1µA, QFN Package
LT3436 3A (I
SW
), 1MHz, 34V Step-Up DC/DC Converter V
IN
: 3V to 25V, V
OUT(MAX)
: 34V, I
Q
: 0.9mA,
I
SD
: <6µA, TSSOP-16E Package
LT3467/LT3467A 1.1A (I
SW
), 1.3MHz/2.1MHz, High Efficiency Step-Up DC/DC Converter V
IN
: 2.6V to 16V, V
OUT(MAX)
: 40V, I
Q
: 1.2mA,
I
SD
: <1µA, ThinSOT Package