ST LM350 User Manual

LM350

Three-terminal 3 A adjustable voltage regulators

Features

Guaranteed 3 A output current

Adjustable output down to 1.2 V

Line regulation typically 0.005 %/V

Load regulation typically 0.1 %

Guaranteed thermal regulation

Current limit constant with temperature

TO-3

 

 

Standard 3-lead transistor package

 

Table 1.

Device summary

 

 

 

 

Order codes

 

 

 

 

 

TO-3

 

Temperature range

 

 

 

 

 

LM350K

 

0 to 125 °C

 

 

 

 

February 2008

Rev 2

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Contents

LM350

 

 

Contents

1

Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. 3

2

Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. 4

3

Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5

4

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6

5

Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7

6

Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8

 

6.1

External capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8

 

6.2

Load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

 

6.3

Protection diodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

7

Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

8

Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11

9

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13

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ST LM350 User Manual

LM350

Diagram

 

 

1 Diagram

Figure 1. Schematic diagram

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Pin configuration

LM350

 

 

2 Pin configuration

Figure 2. Pin connections (bottom view)

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LM350

 

 

 

Maximum ratings

 

 

 

 

 

 

 

 

 

3

 

Maximum ratings

 

 

 

 

 

Table 2.

Absolute maximum ratings

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Symbol

 

 

Parameter

 

Value

 

Unit

 

 

 

 

 

 

 

 

 

PD

 

Power dissipation

 

Internally limited

 

 

VI - VO

 

Input-output voltage differential

35

 

 

V

TSTG

 

Storage temperature range

 

-65 to 150

 

°C

TLEAD

 

lead temperature (Soldering, 10 seconds)

300

 

 

°C

TOP

 

Operating junction temperature range

 

0 to 125

 

°C

Note:

Absolute maximum ratings are those values beyond which damage to the device may occur.

 

 

Functional operation under these condition is not implied

 

 

 

 

 

Table 3.

Thermal data

 

 

 

 

 

 

 

 

 

 

 

 

Symbol

 

Parameter

 

Value

 

Unit

 

 

 

 

 

 

 

RthJC

 

Thermal resistance junction-case

 

1.5

 

°C/W

RthJA

 

Thermal resistance junction-ambient

 

35

 

°C/W

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