MC33565D Просмотр технического описания (PDF) - ON Semiconductor

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MC33565D

Smart Voltage Regulator for Peripheral Card Applications

ON Semiconductor 

MC33565

5.0 V

Main

Input

1

3.3 V

3

Auxiliary

Input

23.1 k

10.4 k

1.25 V

Reference

Low Voltage

+ Detector

-

4.02 V/

4.17 V

3.3 V

Regulator

+

-

Current

Sense

Thermal

Shutdown 475

289

Switch

Drive

8

G

Regulator

Output

7

6

Sense

Input

D

External

P–Channel

MOSFET

S

3.3 V

+

4.7 mF

Load

Ground 4

Figure 2. Functional Block Diagram

PIN ASSIGNMENTS AND FUNCTIONS

PIN #

FUNCTION

PIN DESCRIPTION

1

Main Input

This input connects to the system main power source, typically 5.0 V.

2, 5

NC

No connection. These pins are not internally connected.

3

Auxiliary Input This input connects to the system auxiliary power source, typically 3.3 V.

4

Gnd

This is the regulator and control circuit power ground.

6

Sense Input

The sense input connects directly to the load allowing precise regulation.

7

Regulator Output This output is precisely regulated at 3.3 V and is capable of up to 200 mA.

8

Switch Drive

This output is designed to drive the gate of an external P–channel MOSFET switch.

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