Datasheet

V
IN
V
OUT
GND
ON/OFF
Overcurrent/
Overtemperature
Protection
V
REF
1.23 V
−
+
R
1
R
2
V
OUT
3.3 µF
(see Note A)
1 µF
(see Note A)
V
IN
1
ON/OFF
(see Note B)
2GND
3
5
4
NC
(see Note C)
LP2981
LP2981
www.ti.com ......................................................................................................................................................... SLVS521F – JULY 2004 – REVISED AUGUST 2008
FUNCTIONAL BLOCK DIAGRAM
BASIC APPLICATION CIRCUIT
A. Minimum C
OUT
value for stability (can be increased without limit for improved stability and transient response)
B. ON/ OFF must be actively terminated. Connect to V
IN
if shutdown feature is not used.
C. Pin 4 (NC) must be left open. Do not connect anything to this pin.
Figure 1.
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