MC33163DW datasheet(7/16 Pages) ONSEMI

部件名	MC33163DW

功能描述	3.4 A, Step-Up/Down/ Inverting Switching Regulators

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制造商	ONSEMI [ON Semiconductor]

网页	http://www.onsemi.com

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7 / 16 page

MC34163, MC33163

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7

-

Feedback

Comparator

R

S

Q

LVI

1

+

Current

Limit

8

7

6

5

4

3

2

(Bottom View)

-

+

16

9

10

12

13

14

15

0.25 V

+

Ipk Sense

RSC

VCC

Timing Capacitor

Shutdown

CT

RDT

Voltage Feedback 1

Voltage Feedback 2

LVI Output

1.125 V

15 k

1.25 V

+

45 k

Thermal

Oscillator

Latch

Q2

60

2.0 mA

7.0 V

Bootstrap Input

Switch Emitter

GND

Switch Collector

Driver Collector

+

Sink Only

Positive True Logic

=

Figure 19. Representative Block Diagram

+

-

+

-

11

Q1

GND

Comparator Output

Timing Capacitor CT

Oscillator Output

Output Switch

Output Voltage

Nominal Output

Voltage Level

1

0

1.25 V

0.55 V

1

0

On

Off

Figure 20. Typical Operating Waveforms

Startup

Quiescent Operation

9t

t

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类似说明 - MC33163DW

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