MIC4690 Просмотр технического описания (PDF) - Micrel

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MIC4690

500kHz 1A SuperSwitcher™ Buck Regulator

Micrel 

MIC4690

Functional Characteristics

Micrel

Load Transient

1.5A

0A

100mV

Switching Frequency Foldback

500kHz

TIME (100µs/div)

VIN = 12V

VOUT = 5V

190kHz

TIME

SOA for MIC4690*

1.4

1.2

TA = 25°C

1.0

0.8

0.6

0.4

VOUT = 5V

0.2

TA = 50°C

0

TJ = 125°C

0 5 10 15 20 25 30 35

INPUT VOLTAGE (V)

Normal

Operation

Short

Circuit

Operation

MIC4690

MIC4690BM

IN

SW 3

SHDN

FB

GND

5678

1N4148 82‰ D1

2.2nF

Snubber Circuit

6

April 2005

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