Datasheet

LT3483/LT3483A
12
3483fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2004
LT 0910 REV C • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
–5V Step-Up/Step-Down Converter
Efficiency and Power Loss vs Load Current
PART NUMBER DESCRIPTION COMMENTS
LT1617/LT1617-1 350mA/100mA (I
SW
) High Efficiency
Micropower Inverting DC/DC Converter
V
IN
: 1.2V to 15V, V
OUT(MAX)
= –34V, I
Q
= 20µA, I
SD
< 1µA
ThinSOT Package
LT1931/LT1931A 1A (I
SW
), 1.2MHz/2.2MHz, High Efficiency
Micropower Inverting DC/DC Converter
V
IN
: 2.6V to 16V, V
OUT(MAX)
= –34V, I
Q
= 5.8mA, I
SD
< 1µA
ThinSOT Package
LT1945 Dual Output, Boost/Inverter, 350mA (I
SW
), Constant
Off-Time, High Efficiency Step-Up DC/DC Converter
V
IN
: 1.2V to 15V, V
OUT(MAX)
= ±34V, I
Q
= 40µA, I
SD
< 1µA,
MS10 Package
LT3463 Dual Output, Boost/Inverter, 250mA (I
SW
), Constant
Off-Time, High Efficiency Step-Up DC/DC Converter
with Integrated Schottky Diodes
V
IN
: 2.3V to 15V, V
OUT(MAX)
= ±40V, I
Q
= 40µA, I
SD
< 1µA
DFN Package
LT3464 85mA (I
SW
), High Efficiency Step-Up DC/DC Converter
with Integrated Schottky and PNP Disconnect
V
IN
: 2.3V to 10V, V
OUT(MAX)
= 34V, I
Q
= 25µA, I
SD
< 1µA
ThinSOT Package
LT3472 Boost (350mA) and Inverting (400mA) DC/DC Converter
for CCD Bias with Integrated Schottkys
V
IN
: 2.3V to 15V, V
OUT(MAX)
= ±40V, I
Q
= 2.8mA, I
SD
< 1µA
DFN Package
SW
L1A
4.7µH
L1B
4.7µH
D
LT3483A
FB
C1
4.7µF
• •
V
IN
511k
22pF
C2
10µF
3483 TA03a
V
OUT
–5V
V
IN
2.5V TO 6V
SHDN
GND
C1: TAIYO YUDEN EMK316BJ475ML
C2: TAIYO YUDEN JMK316BJ106ML
L1A, L1B: COILTRONICS SDQ12-4R7 OR
COILCRAFT LPD3015-472
LOAD CURRENT (mA)
0.1
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
1 10 100
3483 TA03b
30
20
10
0
120
150
180
210
90
60
30
0
V
IN
= 3.6V
Switching Waveforms
3483 TA03c
V
SW
10V/DIV
I
L1A
0.5A/DIV
I
L1B
0.5A/DIV
V
OUT
50mV/DIV
AC-COUPLED
2µs/DIV