lt3461es6-trpbf Linear Technology Corporation, lt3461es6-trpbf Datasheet

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lt3461es6-trpbf

Manufacturer Part Number
lt3461es6-trpbf
Description
1.3mhz/3mhz Step-up Dc/dc Converters With Integrated Schottky In Thinsot
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Integrated Schottky Rectifier
Fixed Frequency 1.3MHz/3MHz Operation
High Output Voltage: Up to 38V
Low V
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
Digital Cameras
CCD Bias Supply
XDSL Power Supply
TFT-LCD Bias Supply
Local 5V or 12V Supply
Medical Diagnostic Equipment
Battery Backup
V
5V
IN
CESAT
5V to 12V, 70mA Step-Up DC/DC Converter
OFF ON
C1
1µF
Switch: 260mV at 250mA
10µH
6
4
U
L1
V
SHDN
IN
LT3461A
GND
SW
1
2
V
OUT
FB
5
3
U
261k
30.1k
TM
) Package
15pF
3461 TA01a
C2
1µF
V
12V
70mA
OUT
Integrated Schottky in ThinSOT
DESCRIPTIO
The LT
quency current mode step-up DC/DC converters. Both
devices feature an integrated Schottky and a low V
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.
ThinSOT is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
DC/DC Converters with
®
3461/LT3461A are general purpose fixed fre-
1.3MHz/3MHz Step-Up
85
80
75
70
65
60
0
U
20
LOAD CURRENT (mA)
Efficiency
V
LT3461/LT3461A
IN
= 3.3V
40
60
V
IN
= 5V
3461 TAO1b
80
CESAT
3461af
1

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lt3461es6-trpbf Summary of contents

Page 1

... 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. V OUT 12V ...

Page 2

... Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls ORDER PART NUMBER LT3461AES6 5 V OUT LT3461ES6 4 SHDN S6 PART MARKING LTAHG LTAEB MIN TYP MAX UNITS 2.5 16 1.235 1.255 1.275 ● ...

Page 3

W U TYPICAL PERFOR A CE CHARACTERISTICS Oscillator Frequency (LT3461) 1.6 1.5 1.4 1.3 1.2 1.1 1.0 –40 – 100 TEMPERATURE (°C) 3461a G01 Oscillator Frequency (LT3461A) 3.9 3.6 3.3 3.0 2.7 2.4 2.1 –60 ...

Page 4

LT3461/LT3461A CTIO S SW (Pin 1): Switch Pin. Connect inductor here. Minimize trace at this pin to reduce EMI. GND (Pin 2): Ground Pin. Tie directly to local ground plane. FB (Pin 3): Feedback Pin. ...

Page 5

U U APPLICATIO S I FOR ATIO Inrush Current The LT3461 has a built-in Schottky diode. When supply voltage is applied to the V pin, the voltage difference IN between V and V generates inrush current flowing IN OUT from ...

Page 6

LT3461/LT3461A U U APPLICATIO S I FOR ATIO Inductor Selection The inductors used with the LT3461/LT3461A should have a saturation current rating of 0.3A or greater. If the device is used in an application where the input supply will be ...

Page 7

... MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. V ...

Page 8

... 0.85V 19µA/300µA, IN OUT(MAX <1µA, ThinSOT 2.5V to 16V 36V 2mA, IN OUT(MAX <1µA, SC70, ThinSOT Packages 2.7V to 16V 34V 1.9mA, IN OUT(MAX <1µA, ThinSOT Package SD LT/TP 1004 1K • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2003 3461af ...

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