Datasheet > LTC3646-1

LTC3646-1

更新时间： 2024-02-24 12:24:28

品牌	Logo	应用领域
凌特 - Linear		稳压器
页数	文件大小	规格书
16页	240K
描述
17V, 1A Synchronous Step-Down Regulator with 3.5Î¼A Quiescent Current

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LTC3646-1 数据手册

LTC3621/LTC3621-2

17V, 1A Synchronous

Step-Down Regulator with

3.5µA Quiescent Current

FeaTures

DescripTion

The LTC^®3621/LTC3621-2 is a high efficiency 17V, 1A

synchronousmonolithicstep-downregulator.Theswitch-

ing frequency is fixed to 1MHz or 2.25MHz. The regulator

features ultralow quiescent current and high efficiencies

Wide V Range: 2.7V to 17V

Wide V

Range: 0.6V to V

OUT

95% Max Efficiency

Low I < 3.5µA, Zero-Current Shutdown

Constant Frequency (1MHz/2.25MHz)

over a wide V

range.

OUT

Full Dropout Operation with Low I

1A Rated Output Current

The step-down regulator operates from an input voltage

range of 2.7V to 17V and provides an adjustable output

1ꢀ Output Voltage Accuracy

range from 0.6V to V while delivering up to 1A of output

Current Mode Operation for Excellent Line and Load

Transient Response

current. A user-selectable mode input is provided to allow

the user to trade off ripple noise for light load efficiency;

Burst Mode operation provides the highest efficiency at

light loads, while pulse-skipping mode provides the low-

est voltage ripple.

Pulse-Skipping, Forced Continuous, Burst Mode^®

Operation

Internal Compensation and Soft-Start

Overtemperature Protection

Compact 6-Lead DFN (2mm × 3mm) Package or

8-Lead MSOPE Package with Power Good Output

and Independent SGND Pin

List of LTC3621 Options

PART NAME

LTC3621

FREQUENCY

1.00MHz

OUT

Adjustable

LTC3621-2

2.25MHz

applicaTions

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

and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners. Protected by U.S. Patents, including 5481178, 6580258,

6498466, 6611131, 6177787, 5705919, 5847554.

Portable-Handheld Scanners

Automotive Applications

Emergency Radio

Typical applicaTion

Efficiency and Power Loss vs Load

2.5V V_OUTwith 400mA Burst Clamp, f_SW= 1MHz

100

1.0

4.7µH

2.5V

EFFICIENCY

OUT

2.7V TO 17V

0.1

10µF

604k

191k

22pF

LTC3621

RUN

22µF

MODE

3621 TA01a

0.01

0.001

0.0001

INTV

GND

1µF

POWER LOSS

0.01

= 12V

0.0001

0.001

0.1

LOAD CURRENT (A)

3621 TA01b

3621f

For more information www.linear.com/LTC3621

12 3 4 5 6 7...16

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与LTC3646-1相关器件

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LTC3670EDDB#TRMPBF	Linear	获取价格	LTC3670 - Monolithic 400mA Buck Regulator with Dual 150mA LDOs in 3mm x 2mm DFN; Package:

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