MIC2172 Ver la hoja de datos (PDF) - Micrel

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MIC2172

100kHz 1.25A Switching Regulators

Micrel 

MIC2172/3172

Typical Performance Characteristics

Error Amplifier Gain

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

-100 -50 0 50 100 150

Temperature (°C)

7000

6000

5000

4000

3000

2000

1000

0

1

Error Amplifier Gain

10 100 1000 10000

Frequency (kHz)

Micrel, Inc.

Error Amplifier Phase

-30

0

30

60

90

120

150

180

210

1

10 100 1000 10000

Frequency (kHz)

Block Diagram MIC2172

VI N

Pin 5

SYNC

Pin 4

2.3V

Reg.

100kHz

Osc.

Logic

FB

Pin 3

1.24V

Ref.

Error

Amp.

Com-

parator

S

GND

Pin 1

COMP

Pin 2

Anti-Sat.

VSW

Pin 7

D1

Driver

Q1

Current

Amp.

PP

GND GND

21

Pin 6 Pin 8

April 2005

7

M9999-042205

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