LT3473EDD#PBF

更新时间： 2024-02-28 04:53:51

品牌	Logo	应用领域
凌特 - Linear		转换器升压转换器
页数	文件大小	规格书
12页	266K
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中文翻译

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数据手册

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LT3473EDD#PBF 数据手册

LT3473/LT3473A

Micropower 1A Boost

Converter with Schottky

and Output Disconnect

FEATURES

DESCRIPTIO

The LT^®3473/LT3473A are micropower step-up DC/DC

converters with integrated Schottky diode and output

disconnect circuitry in low profile DFN packages. The

small package size, high level of integration and the use of

tiny SMT components yield a solution size of less than

50mm². Theinternal1Aswitchallowsthedevicetodeliver

25Vatupto80mAfromaLi-Ioncell,whileautomaticBurst

Mode operation maintains efficiency at light load. An

auxiliary reference input (CTRL) allows the user to over-

ride the internal 1.25V feedback reference with any lower

value, allowing full control of the output voltage during

operation. A PGOOD pin sinks current when the output

voltage reaches 90% of final value.

■

Tiny Solution Size

Low Quiescent Current:

■

150µA in Active Mode (V_IN= 3.6V, V_OUT= 15V,

No Load)

1µA in Shutdown Mode

■

Internal 1A, 36V Switch

■

Integrated Schottky Diode

■

Integrated PNP Output Disconnect

■

Internal Reference Override Pin

■

PGOOD Pin

■

25V at 80mA from 3.6V Input

■

Auxiliary NPNs for Intermediate

Bias Voltages (LT3473A)

Automatic Burst Mode^®Operation at Light Load

■

TheLT3473AincludestwoNPNtransistorsforgenerating

intermediate bias voltages from the output and is offered

in a 12-lead (4mm × 3mm) DFN package. The LT3473

does not include these NPNs and is offered in an 8-lead

(3mm × 3mm) package.

■

Constant Switching Frequency: 1.2MHz

Thermal Shutdown

Input Range: 2.2V to 16V

■

Low Profile (3mm × 3mm) DFN Package (LT3473)

Low Profile (4mm × 3mm) DFN Package (LT3473A)

■

The rugged 36V switch and output disconnect circuitry

allow outputs up to 34V to be easily generated in a simple

boost topology.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Burst Mode is a registered trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

APPLICATIO S

■

OLED Bias

CCD Bias

■

TYPICAL APPLICATIO

Conversion Efficiency and Power Loss vs Output Current

500

400

300

200

100

= 3.6V

OUT

= 15V

OUT

25V

PGOOD

CTRL

OUT

80mA

2.2µF

6.8µH

LT3473

3V TO 4.2V

CAP

0.47µF

SHDN

100k

GND

4.7µF

3473 TA01a

0.1

OUTPUT CURRENT (mA)

100

3473 TA01b

3473f

12 3 4 5 6 7...12

中文翻译

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