LP3879MR-1.2 Datasheet, PDF (2/18 Pages) Texas Instruments – LP3879 Micropower 800mA Low Noise "Ceramic Stable" Voltage Regulator for Low

LP3879
SNVS396B – MAY 2006 – REVISED APRIL 2013
Basic Application Circuit
OUTPUT
*4.7 PF
(Ceramic or
Tantalum
recommended)
*0.01 PF
(See App
Hints)
**S/D
+
6
1
4
5
+ *10 PF
(Ceramic
+
recommended)
-
2 N/C
8
LP3879-X.X
7 N/C
+
1.23V
3
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*Capacitance values shown are minimum required to assure stability. Larger output capacitor provides improved
dynamic response. Output capacitor must meet ESR requirements (see Application Information).
**The Shutdown pin must be actively terminated (see Application Information). Tie to INPUT (Pin 4) if not used.
Connection Diagram
BYPASS 1
N/C 2
GROUND 3
INPUT ⁴
GND
8 SHUTDOWN
7 _N/C
6 SENSE
5 OUTPUT
BYPASS 1
N/C 2
GROUND 3
INPUT 4
8 _SHUTDOWN
7 N/C
6 SENSE
5 OUTPUT
Figure 1. Top View
8-Lead SO PowerPad
See DDA0008B Package
Figure 2. Top View
8-Lead WSON
See NGT0008A Package
Pin
1
2
3
4
5
6
7
8
SO PowerPad,
WSON
Name
BYPASS
N/C
GROUND
INPUT
OUTPUT
SENSE
N/C
SHUTDOWN
SUBSTRATE
GROUND
PIN DESCRIPTIONS
Function
The capacitor connected between BYPASS and GROUND lowers output noise voltage
level and is required for loop stability.
DO NOT CONNECT. This pin is used for post package test and must be left floating.
Device ground.
Input source voltage.
Regulated output voltage.
Remote Sense. Tie directly to output or remotely at point of load for best regulation.
No internal connection.
Output is enabled above turn-on threshold voltage. Pull down to turn off regulator output.
The exposed die attach pad should be connected to a thermal pad at ground potential. For
additional information on using Texas Instruments' Non Pull Back WSON package, please
refer to WSON application note SNOA401
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
2
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