ENABLE

LOGIC

-

+

MOSFET

DRIVER

FOLDBACK

CURRENT

LIMITING

1.25 V

REFERENCE

THERMAL

SHUTDOWN

IN

OUT

GND

P-FET

P-FET

N/C

R1

R2

SNS

ENABLE

LOGIC

-

+

MOSFET

DRIVER

FOLDBACK

CURRENT

LIMITING

1.25V

REFERENCE

THERMAL

SHUTDOWN

IN

OUT

GND

P-FET

P-FET

R

1

R

2

11

LP38690, LP38692

www.ti.com

SNVS322M – DECEMBER 2004 – REVISED DECEMBER 2015

Product Folder Links: LP38690 LP38692

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Copyright © 2004–2015, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The LP38690 and LP38692 devices are designed to meet the requirements of portable, battery-powered digital

systems providing an accurate output voltage with fast start-up. When disabled via a low logic signal at the

enable pin (EN), the power consumption is reduced to virtually zero (LP38692 only). The LP38690 and LP38692

perform well with a single 1-

μF input capacitor and a single 1-μF ceramic output capacitor.

7.2 Functional Block Diagrams

Figure 26. LP38690 Functional Diagram (TO-252)

Figure 27. LP38690 Functional Diagram (WSON)