MC33167 데이터 시트보기 (PDF) - ON Semiconductor

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MC33167

5.0 A, Step-Up/Down/Inverting Switching Regulators

ON Semiconductor 

+

CT

Oscillator

Pulse Width

Modulator

MC34167, MC33167

Current

Sense

S

Q

R

PWM Latch

Undervoltage

Lockout

Vin

4

Input Voltage/VCC

Cin

Switch

Output

2

Thermal

Shutdown

+

100 µA

5.05 V

Reference

Error

Amp

120

+ Voltage

Feedback

Input

1

R2

Gnd 3

Compensation 5 CF

RF

=

Sink Only

Positive True Logic

R1

Figure 14. MC34167 Representative Block Diagram

L

VO

CO

4.1 V

Timing Capacitor CT

Compensation

2.3 V

ON

Switch Output

OFF

Figure 15. Timing Diagram

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