LM2576BM 데이터 시트보기 (PDF) - Tiger Electronic

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LM2576BM

3A Step-Down Voltage Regulator

Tiger Electronic 

LM2576BM

PIN FUNCTIONS

+VIN —This is the positive input supply for the IC switching regulator. A suitable input

bypass capacitor must be present at this pin to minimize voltage transients and to supply the

switching currents needed by the regulator.

Ground —Circuit ground.

Output —Internal switch, the voltage at this pin switches between (+VIN VSAT) and

approximately -0.5V. To minimize coupling to sensitive circuitry, the PC board copper area

connected to this pin should be kept to a minimum.

FeedBack —Senses the regulated output voltage to complete the feedback loop.

—Allows the switching regulator circuit to be shut down using logic level signals. Pulling

this pin below a threshold voltage of approximately 1.5V turns the regulator on, and

shutdown feature is not needed, the ON/OFF pin can be wired to the ground pin or it can be

left open, in either case the regulator will be in the ON condition.

ABSOLUTE MAXIMUM RATINGS (Ta=25°C) *

Characteristic

Maximum supply voltage

ON /OFF pin input voltage

Output voltage to ground(steady state)

Power dissipation

Storage temperature range

Maximum junction temperature

ESD susceptibility (Human Body Model)

Va l u e

45

-0.3V≤V≤+VIN

-1

Internally limited

-65~+150

2

150

Unit

V

V

V

°C

kV

°C

RECOMMENDED OPERATING CONDITIONS

Characteristic

Supply Vo ltage

Operating temperature range

Symbol

VCC

Va l u e

6～ 40

-40～ +125

Unit

V

°C

3/9

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