LM2703MF-ADJ National Semiconductor, LM2703MF-ADJ Datasheet - Page 2

• Manufacturer Part Number: LM2703MF-ADJ
• Description: DC/DC Converter IC
• Manufacturer: National Semiconductor

Specifications of LM2703MF-ADJ

• No. Of Outputs: 1
• Output Voltage: 21V
• No. Of Pins: 5
• Mounting Type: Surface Mount
• Voltage Regulator Type: Boost Switching
• Supply Voltage Min: 2.2V
• Operating Temperature Max: 125°C
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Connection Diagram
Ordering Information
Pin Descriptions/Functions
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:
LM2703MFX-ADJ
LM2703MF-ADJ
Order Number
Pin
1
2
3
4
5
SHDN
Name
GND
SW
V
FB
IN
Package Type
SOT23-5
SOT23-5
Power Switch input.
Ground.
Output voltage feedback input.
Shutdown control input, active low.
Analog and Power input.
T
Jmax
= 125˚C, θ
NSC Package Drawing
Top View
MA05B
MA05B
SOT23-5
JA
2
= 220˚C/W (Note 2)
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
as close to the device as possible.
IN
(Pin 5): Input Supply Pin. Bypass this pin with a capacitor
Function
Top Mark
20030602
S48B
S48B
1000 Units, Tape and Reel
3000 Units, Tape and Reel
Supplied As