Datasheet

V
IN
GND
6 5
V
EN
4
N/C
1
V
OUT
2
Gnd
3
N/C
V
IN
GND
65
V
EN
4
N/C
1
V
OUT
2
Gnd
3
N/C
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Bottom View Top View
B1A1
B2A2
V
IN
V
OUT
V
EN
GND
B1 A1
B2 A2
V
IN
V
OUT
V
EN
GND
LP3990
SNVS251I –MAY 2004–REVISED MAY 2013 www.ti.com
Typical Application Circuit (continued)
Pin Descriptions
Pin No Symbol Name and Function
WQFN DSBGA SOT-23
5 A2 3 V
EN
Enable Input; Enables the Regulator when ≥ 0.95V.
Disables the Regulator when ≤ 0.4V.
Enable Input has 1MΩ pulldown resistor to GND.
2 A1 2 GND Common Ground. Connect to Pad.
1 B1 5 V
OUT
Voltage output. A 1.0µF Low ESR Capacitor should be connected to this Pin.
Connect this output to the load circuit.
6 B2 1 V
IN
Voltage Supply Input. A 1.0µF capacitor should be connected at this input.
3 4 N/C No Connection. Do not connect to any other pin.
4 N/C No Connection. Do not connect to any other pin.
Pad GND Common Ground. Connect to Pin 2.
5.2 Connection Diagram
DSBGA, 4 Bump Package
See Package Number YZR0004
WQFN-6 Package
See Package Number NGG0006A
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