LM2703
Connection Diagram
Top View
20030602
T
Jmax
SOT23-5
= 125˚C,
θ
JA
= 220˚C/W
Ordering Information
Order Number
LM2703MF-ADJ
LM2703MFX-ADJ
Package Type
SOT23-5
SOT23-5
NSC Package Drawing
MA05B
MA05B
Top Mark
S48B
S48B
Supplied As
1000 Units, Tape and Reel
3000 Units, Tape and Reel
Pin Description/Functions
Pin
1
2
3
4
5
Name
SW
GND
FB
SHDN
V
IN
Power Switch input.
Ground.
Output voltage feedback input.
Shutdown control input, active low.
Analog and Power input.
Connect the ground of the feedback network to an AGND
plane which should be tied directly to the GND pin.
SHDN(Pin 4):
Shutdown Pin. The shutdown pin is an active
low control. Tie this pin above 1.1V to enable the device. Tie
this pin below 0.3V to turn off the device.
V
IN
(Pin 5):
Input Supply Pin. Bypass this pin with a capacitor
as close to the device as possible.
Function
SW(Pin 1):
Switch Pin. This is the drain of the internal
NMOS power switch. Minimize the metal trace area con-
nected to this pin to minimize EMI.
GND(Pin 2):
Ground Pin. Tie directly to ground plane.
FB(Pin 3):
Feedback Pin. Set the output voltage by selecting
values for R1 and R2 using:
www.national.com
2
NSC [ NATIONAL SEMICONDUCTOR ]
