LP38798_15 Datasheet, PDF (3/27 Pages) Texas Instruments – LP38798 High PSRR, Ultra-Low-Noise, 800-mA Linear Voltage Regulator for RF/Analog Circuits

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5 Pin Configuration and Functions
WSON (DNT) Package
12 Pins
Top View
LP38798
SNOSCT6B – MARCH 2013 – REVISED DECEMBER 2014
IN 1
IN 2
IN(CP) 3
CP 4
EN 5
GND(CP) 6
Exposed Pad
on Bottom
(DAP)
12 OUT
11 OUT
10 OUT(FB)
9 SET
8 FB
7 GND
Connect WSON DAP to GND at Pins 6 and 7.
PIN
NUMBER
1, 2
3
NAME
IN
IN(CP)
4
CP
5
6
7
8
9
10
11, 12
EN
GND(CP)
GND
FB
SET
OUT(FB)
OUT
Exposed Pad
DAP
Pin Functions
I/O
DESCRIPTION
I
Device unregulated input voltage pins. Connect pins together at the package.
I
Charge pump input voltage pin. Connect directly to pins 1 and 2 at the package.
O
Charge pump output. See Charge Pump section in Application and Implementation for more
information.
Enable pin. This pin has an internal pull-up to turn the LDO output On by default. A logic low
I
level will turn the LDO output Off, and reduce the operating current of the device. See Enable
Input Operation section in Application and Implementation for more information.
—
Device charge pump ground pin.
—
Device analog ground pin.
i
Feedback pin for programming the output voltage.
I/O
Reference voltage output, and noise filter input. A feedback resistor divider network from this
pin to FB and GND will set the output voltage of the device.
I
OUT buffer feedback input pin. Connect directly to pins 11 and 12 at the package.
O
Device regulated output voltage pins. Connect pins together at the package.
The exposed die attach pad on the bottom of the package should be connected to a copper
—
thermal pad on the PCB at ground potential. Connect to ground potential or leave floating. Do
not connect to any potential other than the same ground potential seen at device pins 6
(GND(CP)) and 7 (GND). See Thermal Considerations section in Layout for more information.
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