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LM2831XSD Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM2831XSD
Description  High Frequency 1.5A Load - Step-Down DC-DC Regulator
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2831XSD Datasheet(HTML) 3 Page - National Semiconductor (TI)

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Pin Descriptions 5-Pin SOT23
Pin
Name
Function
1
SW
Output switch. Connect to the inductor and catch diode.
2
GND
Signal and power ground pin. Place the bottom resistor of the feedback network as close as
possible to this pin.
3
FB
Feedback pin. Connect to external resistor divider to set output voltage.
4
EN
Enable control input. Logic high enables operation. Do not allow this pin to float or be
greater than VIN + 0.3V.
5
VIN
Input supply voltage.
Pin Descriptions 6-Pin LLP
Pin
Name
Function
1
FB
Feedback pin. Connect to external resistor divider to set output voltage.
2
GND
Signal and power ground pin. Place the bottom resistor of the feedback network as
close as possible to this pin.
3
SW
Output switch. Connect to the inductor and catch diode.
4
VIND
Power Input supply.
5
VINA
Control circuitry supply voltage. Connect VINA to VIND on PC board.
6
EN
Enable control input. Logic high enables operation. Do not allow this pin to float or be
greater than VINA + 0.3V.
DAP
Die Attach Pad
Connect to system ground for low thermal impedance, but it cannot be used as a
primary GND connection.
www.national.com
3


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