LP38869_15 Datasheet, PDF (2/23 Pages) Texas Instruments – 1A FlexCap, Low-Dropout Linear Regulator with 0.75% Accuracy

LP38869
SNVS877B – AUGUST 2012 – REVISED APRIL 2013
Connection Diagram
N/C 1
IN 2
IN 3
IN 4
IN 5
RST 6
SHDN 7
SS 8
Exposed Pad
on Bottom
(DAP)
16 N/C
15 OUT
14 OUT
13 OUT
12 OUT
11 SET
10 GND
9 N/C
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Figure 1. Top View
16-Pin HTSSOP
Pin #
1
2, 3, 4, 5
6
7
8
9
10
11
12, 13,
14, 15
16
DAP
Pin Name
N/C
IN
RST
SHDN
SS
N/C
GND
SET
OUT
N/C
Exposed
Pad
Pin Descriptions for 16-Pin HTSSOP Packages
Description
Application Information
No Connection
No Internal Electrical Connection
Positive power input
Operates from +2.7V to +5.5V. Bypass capacitor is required, located close to the
package; 1 μF is recommended as a minimum value
RESET Output
SHUTDOWN Input
Open-drain output is low when V_OUT is 8% below normal regulation voltage. If
regulation returns RST remains low for at least 3ms afterwards. Use large value
pull-up resistor (100 kΩ) to V_OUT to obtain output voltage.
A logic low state on the SHDN input will turn the regulator off, and will discharge
any capacitor on the SS pin. A logic high on the SHDN pin will turn the regulator
ON.
Soft-Start control
Connect a capacitor from SS to GND. If SS is left open SS feature is disabled
No Connection
No Internal Electrical Connection
Power Ground
Return connection for input and output voltages.
Operational Mode Selection
Used to select between Pre-Set Mode or Adjustable Mode. Connect to ground
(Pre-Set Mode) or to a resistor divider from V_OUT to SET pin to GND (Adjustable
Mode).
Regulated output
Regulated output voltage. A bypass capacitor is required, located close to the
package; 1 μF recommended as the minimum value
No Connection
No Internal Electrical Connection
Thermal Connection
Solder the DAP to a copper plane under the package to improve thermal
performance. DAP can be connected to ground at device Pin 10. Optionally, but
not recommended, the DAP can be left floating. Do not connect DAP to any
potential other than ground. See Operating Region and Power Dissipation.
2
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