Datasheet > LTC3388-3_15

LTC3388-3_15

更新时间： 2022-02-26 13:01:56

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
20页	293K
描述
20V High Efficiency Nanopower Step-Down Regulator

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LTC3388-3_15 数据手册

LTC3388-1/LTC3388-3

20V High Efficiency

Nanopower

Step-Down Regulator

FEATURES

DESCRIPTION

TheLTC^®3388-1/LTC3388-3are highefficiencystep-down

DC/DCconverterswithinternalhighsideandsynchronous

power switches that draw only 720nA typical DC sup-

ply current at no load while maintaining output voltage

regulation.

720nA Input I in Regulation (No Load), V = 4V

820nA Input I in Regulation (No Load), V = 20V

400nA Input I in UVLO

2.7V to 20V Input Operating Range

Up to 50mA of Output Current

Pin Selectable Output Voltages:

1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1)

2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3)

High Efficiency Hysteretic Synchronous

DC/DC Conversion

Capableofsupplying50mAofloadcurrent,theLTC3388-1/

LTC3388-3alsoincorporateanaccurateundervoltagelock-

out (UVLO) feature to disable the converter and maintain

a low quiescent current state when the input voltage falls

below 2.3V. In regulation, the LTC3388-1/LTC3388-3 enter

a sleep state in which both input and output quiescent cur-

rents are minimal. The buck converter turns on and off as

neededtomaintainregulation.Anadditionalstandbymode

disables buck switching while the output is in regulation

for short duration loads requiring low ripple.

Standby Mode Disables Buck Switching

Available in 10-Lead MSE and 3mm × 3mm

DFN Packages

APPLICATIONS

Output voltages of 1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1) and

2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3) are pin selectable. The

Keep Alive Power for Portable Products

Industrial Control Supplies

LTC3388-1/LTC3388-3canoperatewithV upto20Vwhile

Distributed Power Systems

Battery-Operated Devices

the no load quiescent current remains below 1μA.

L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks

of Linear Technology Corporation. All other trademarks are the property of their respective

owners.

TYPICAL APPLICATION

Efficiency vs Load Current

50mA Step-Down Converter

100

= 1.8V, L = 100μH

OUT

2.7V TO 20V

1μF

LTC3388-1/

LTC3388-3

100μH

OUT

CAP

2.2μF

25V

47μF

IN2

PGOOD

D0, D1

4.7μF

OUTPUT

VOLTAGE

SELECT

STBY

GND

338813 TA01a

= 3.0V

= 10V

= 20V

1μ

10μ

100μ

10m

LOAD CURRENT (A)

338813 TA01b

338813f

12 3 4 5 6 7...20

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与LTC3388-3_15相关器件

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