LT3493

更新时间： 2023-12-18 00:00:00

品牌	Logo	应用领域
凌特 - Linear		稳压器开关
页数	文件大小	规格书
20页	587K
描述
1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN

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LT3493 数据手册

LT3493

1.2A, 750kHz Step-Down

Switching Regulator in

2mm × 3mm DFN

FEATURES

DESCRIPTION

The LT^®3493 is a current mode PWM step-down DC/DC

converter with an internal 1.75A power switch. The wide

operating input range of 3.6V to 36V (40V maximum)

makes the LT3493 ideal for regulating power from a wide

variety of sources, including unregulated wall transform-

ers, 24V industrial supplies and automotive batteries.

Its high operating frequency allows the use of tiny, low

cost inductors and ceramic capacitors, resulting in low,

predictable output ripple.

Wide Input Range: 3.6V to 36V Operating,

40V Maximum

1.2A Output Current

Fixed Frequency Operation: 750kHz

Output Adjustable Down to 780mV

Short-Circuit Robust

Uses Tiny Capacitors and Inductors

Soft-Start

Internally Compensated

Low Shutdown Current: <2μA

Cycle-by-cycle current limit provides protection against

shorted outputs and soft-start eliminates input current

surge during start-up. The low current (<2μA) shutdown

mode provides output disconnect, enabling easy power

management in battery-powered systems.

Low V

Switch: 330mV at 1A

CESAT

Thermally Enhanced, Low Proﬁle DFN Package

APPLICATIONS

Automotive Battery Regulation

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

All other trademarks are the property of their respective owners.

Industrial Control Supplies

Wall Transformer Regulation

Distributed Supply Regulation

Battery-Powered Equipment

TYPICAL APPLICATION

Efﬁciency

3.3V Step-Down Converter

OUT

3.3V

BOOST

LT3493

4.2V TO 36V

1.2A, V > 12V

0.95A, V > 5V

0.1μF

10μH

ON OFF

SHDN

32.4k

10k

22pF

GND

10μF

1μF

= 12V

OUT

= 3.3V

3493 TA01a

L = 10μH

0.8

LOAD CURRENT (A)

1.0

0.2

0.4

0.6

1.2

3493 TA01b

3493fb

12 3 4 5 6 7...20

中文翻译

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