LP38691_15 Datasheet, PDF (11/34 Pages) Texas Instruments – LP3869x/-Q1 500-mA Low-Dropout CMOS Linear Regulators Stable With Ceramic Output Capacitors

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8 Detailed Description
LP38691, LP38693, LP38691-Q1, LP38693-Q1
SNVS321N – JANUARY 2005 – REVISED MARCH 2015
8.1 Overview
The LP38691 and LP38693 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 (LP38693 only).
The LP38691 and LP38693 perform well with a single 1-μF input capacitor and a single 1-μF ceramic output
capacitor.
8.2 Functional Block Diagrams
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 23. LP38691 Functional Diagram (WSON)
IN
P-FET
-
ENABLE
+
LOGIC
THERMAL
SHUTDOWN
1.25-V
REFERENCE
MOSFET
DRIVER
FOLDBACK
CURRENT
LIMITING
P-FET
OUT
R1
R2
GND
Figure 24. LP38691 Functional Diagram (TO-252)
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Product Folder Links: LP38691 LP38693 LP38691-Q1 LP38693-Q1