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LT3461A Datasheet(PDF) 1 Page - Linear Technology

Part # LT3461A
Description  1.3MHz/3MHz Step-Up DC/DC Converters with Integrated Schottky in ThinSOT
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3461A Datasheet(HTML) 1 Page - Linear Technology

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LT3461/LT3461A
1
3461af
TYPICAL APPLICATIO
FEATURES
DESCRIPTIO
APPLICATIO S
Digital Cameras
CCD Bias Supply
XDSL Power Supply
TFT-LCD Bias Supply
Local 5V or 12V Supply
Medical Diagnostic Equipment
Battery Backup
5V to 12V, 70mA Step-Up DC/DC Converter
Efficiency
VIN
5V
L1
10µH
261k
30.1k
C2
1µF
15pF
C1
1µF
VOUT
12V
70mA
1
2
VIN
VOUT
SW
3
4
5
6
FB
SHDN
GND
LT3461A
3461 TA01a
OFF ON
Integrated Schottky Rectifier
Fixed Frequency 1.3MHz/3MHz Operation
High Output Voltage: Up to 38V
Low VCESAT Switch: 260mV at 250mA
12V at 70mA from 5V Input
5V at 115mA from 3.3V Input
Wide Input Range: 2.5V to 16V
Uses Small Surface Mount Components
Low Shutdown Current: <1µA
Soft-Start
Low Profile (1mm) SOT-23 (ThinSOT
TM) Package
1.3MHz/3MHz Step-Up
DC/DC Converters with
Integrated Schottky in ThinSOT
The LT
®3461/LT3461A are general purpose fixed fre-
quency current mode step-up DC/DC converters. Both
devices feature an integrated Schottky and a low VCESAT
switch allowing a small converter footprint and lower parts
cost. The LT3461 switches at 1.3MHz while the LT3461A
switches at 3MHz. These high switching frequencies en-
able the use of tiny, low cost and low height capacitors and
inductors. The constant switching frequency results in
predictable output noise that is easy to filter, and the
inductor based topology ensures an input free from switch-
ing noise typically present with charge pump solutions.
The high voltage switch in the LT3461/LT3461A is rated at
40V making the device ideal for boost converters up to
38V.
The LT3461/LT3461A are available in a low profile (1mm)
SOT-23 package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
LOAD CURRENT (mA)
0
85
80
75
70
65
60
3461 TAO1b
20
40
60
80
VIN = 5V
VIN = 3.3V


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