ST PB137 User Manual

Positive voltage regulator for battery charger

Features

■ Reverse leakage current less than 10 µA

■ Three terminal fixed version (13.7 V) output

current in excess of 1.5 A

■ Available in ± 1 % (AC) selection at 25 °C

■ Typical dropout voltage 2 V

■ Temperature range 0 to 150 °C

PB137

Description

The PB137 is a positive voltage regulator able to
provide 1.5 A, at V
charger for lead acid battery. The main feature is
a reverse leakage current (Max 10 µA at T
40 °C V

= floating and VO = 13.7 V). It is available

I

in TO-220 and it employs internal current limiting,
thermal shut-down and safe area protection,
making it essentially indestructible. If adequate
heat-sinking is provided, they can deliver over 1 A
output current.

= 13.7 V and is intended as a

O

= 0 to

J

TO-220

Table 1. Device summary

Order code Package Output voltage

PB137ACV TO-220 1.5 V

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Contents PB137

Contents

1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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PB137 Diagram

1 Diagram

Figure 1. Schematic diagram

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Pin configuration PB137

2 Pin configuration

Figure 2. Pin connections (top view)

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PB137 Application

3 Application

Figure 3. Application circuit

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