LP38690_15 Datasheet, PDF (11/31 Pages) Texas Instruments – LP38690, LP38692 1-A Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors

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7 Detailed Description
LP38690, LP38692
SNVS322L – DECEMBER 2004 – REVISED MARCH 2015
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
IN
P-FET
-
ENABLE
+
LOGIC
THERMAL
SHUTDOWN
1.25V
REFERENCE
GND
MOSFET
DRIVER
FOLDBACK
CURRENT
LIMITING
P-FET
OUT
R
1
R
2
Figure 26. LP38690 Functional Diagram (TO-252)
IN
P-FET
N/C
GND
-
ENABLE
+
LOGIC
THERMAL
SHUTDOWN
1.25 V
REFERENCE
MOSFET
DRIVER
FOLDBACK
CURRENT
LIMITING
P-FET
OUT
SNS
R1
R2
Figure 27. LP38690 Functional Diagram (WSON)
Copyright © 2004–2015, Texas Instruments Incorporated
Product Folder Links: LP38690 LP38692
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