MC33163DWR2G 데이터 시트보기 (PDF) - ON Semiconductor

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MC33163DWR2G

3.4 A, Step−Up/Down/Inverting Switching Regulators

ON Semiconductor 

MC34163, MC33163

Ipk Sense

RSC

VCC

Timing Capacitor

CT

Shutdown

RDT

GND

8

0.25 V

+−

Current

Limit

+

7

+

6 Oscillator

R

5

Q

Thermal

S

4

Latch

+

9 Driver Collector

10

Switch Collector

Q1

11

Q2

12

60

GND

13

Voltage Feedback 1 3

14

Voltage Feedback 2 2

45 k

+ Feedback

+ +− Comparator

Switch Emitter

15

LVI Output 1

+

+−

LVI

1.25 V 15 k

+

1.125 V

2.0 mA

+ 7.0 V

16 Bootstrap Input

+

−

(Bottom View)

Figure 19. Representative Block Diagram

=

Sink Only

Positive True Logic

1

Comparator Output

0

1.25 V

Timing Capacitor CT

0.55 V

1

Oscillator Output

0

On

Output Switch

Off

Nominal Output

Voltage Level

Output Voltage

t

9t

Startup

Quiescent Operation

Figure 20. Typical Operating Waveforms

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