LT3461AES6 LINER [Linear Technology], LT3461AES6 Datasheet

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LT3461AES6

Manufacturer Part Number
LT3461AES6
Description
1.3MHz/3MHz Step-Up DC/DC Converters with Integrated Schottky in ThinSOT
Manufacturer
LINER [Linear Technology]
Datasheet
1.LT3461AES6.pdf (8 pages)

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Bonase Electronics (HK) Co., Limited Bonase Electronics (HK) Co., Limited
Part Number:
LT3461AES6
Manufacturer:
LT
Quantity:
10 000
Company:
Meier Automation Equipment Co., Limited Meier Automation Equipment Co., Limited
Part Number:
LT3461AES6
Manufacturer:
LT
Quantity:
20 000
Company:
Meier Automation Equipment Co., Limited Meier Automation Equipment Co., Limited
Part Number:
LT3461AES6#TRMPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Bonase Electronics (HK) Co., Limited Bonase Electronics (HK) Co., Limited
Part Number:
LT3461AES6#TRPBF
Manufacturer:
LTC
Quantity:
380
Company:
Meier Automation Equipment Co., Limited Meier Automation Equipment Co., Limited
Part Number:
LT3461AES6#TRPBF
Manufacturer:
LT
Quantity:
20 000
FEATURES
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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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LT3461AES6 Summary of contents

Page 1

FEATURES ■ Integrated Schottky Rectifier ■ Fixed Frequency 1.3MHz/3MHz Operation ■ High Output Voltage 38V ■ Low V Switch: 260mV at 250mA CESAT ■ 12V at 70mA from 5V Input ■ 115mA from 3.3V Input ■ ...

Page 2

... Note 2: The LT3461E/LT3461AE is guaranteed to meet specifications from 0°C to 70°C. 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 ...

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

U TYPICAL APPLICATIO S 3. Step-Up Converter (LT3461A) L1 4.7µ 3. OUT R1 1µF LT3461A 45. SHDN OFF ON FB GND R2 2 15k C1, C2: ...

Page 8

LT3461/LT3461A U TYPICAL APPLICATIO S Low Profile (1mm) 3.3V to 15V Step-Up Converter L1 10µ 3. OUT 1µF LT3461A 332k 4 3 OFF ON SHDN FB GND 2 30.1k C1: ...

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