LP38690-ADJ_16 Datasheet, PDF (11/27 Pages) Texas Instruments – 1-A Low Dropout CMOS Linear Regulator

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7 Detailed Description
LP38690-ADJ, LP38692-ADJ
SNVS323I – DECEMBER 2004 – REVISED FEBRUARY 2016
7.1 Overview
The LP3869x-ADJ 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-ADJ only). The LP3869x devices 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
N/C
GND
-
ENABLE
+
LOGIC
THERMAL
SHUTDOWN
1.25-V
REFERENCE
MOSFET
DRIVER
FOLDBACK
CURRENT
LIMITING
Figure 27. LP38690-ADJ (WSON)
P-FET
OUT
ADJ
IN
P-FET
EN
GND
-
ENABLE
+
LOGIC
THERMAL
SHUTDOWN
1.25-V
REFERENCE
MOSFET
DRIVER
FOLDBACK
CURRENT
LIMITING
P-FET
OUT
ADJ
Figure 28. LP38692-ADJ (SOT-223, WSON)
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