LT1933 Datasheet

IC型号：
LT1933
PDF描述：
600mA, 500kHz Step-Down Switching Regulator in SOT-23
文件大小：
629.41KB
芯片厂家：
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LT1933

600mA, 500kHz Step-Down

Switching Regulator

in SOT-23

FEATURES

鈻?/div>

DESCRIPTIO

Wide Input Range: 3.6V to 36V

5V at 600mA from 16V to 36V Input

3.3V at 600mA from 12V to 36V Input

5V at 500mA from 6.3V to 36V Input

3.3V at 500mA from 4.5V to 36V Input

Fixed Frequency 500kHz Operation

Uses Tiny Capacitors and Inductors

Soft-Start

Internally Compensated

Low Shutdown Current: <2碌A

Output Adjustable Down to 1.25V

Low Profile (1mm) SOT-23 (ThinSOT鈩? Package

The LT

庐

1933 is a current mode PWM step-down DC/DC

converter with an internal 0.75A power switch, packaged

in a tiny 6-lead SOT-23. The wide input range of 3.6V to

36V makes the LT1933 suitable for regulating power from

a wide variety of sources, including unregulated wall

transformers, 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.

Cycle-by-cycle current limit provides protection against

shorted outputs, and soft-start eliminates input current

surge during start up. The low current (<2碌A) shutdown

provides output disconnect, enabling easy power man-

agement in battery-powered systems.

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

ThinSOT is a trademark of Linear Technology Corporation.

APPLICATIO S

鈻?/div>

Automotive Battery Regulation

Industrial Control Supplies

Wall Transformer Regulation

Distributed Supply Regulation

Battery-Powered Equipment

TYPICAL APPLICATIO

3.3V Step-Down Converter

1N4148

4.5V TO 36V

BOOST

LT1933

OFF ON

SHDN

GND

16.5k

2.2碌F

10k

22碌F

MBRM140

0.1碌F

= 12V

22碌H

EFFICIENCY (%)

OUT

3.3V/500mA

OUT

= 3.3V

100

300

400

LOAD CURRENT (mA)

200

500

600

1933 TA01a

Efficiency

OUT

= 5V

1933 TA01b

1933f

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