LM3478MA National Semiconductor Corporation, LM3478MA Datasheet - Page 2

• Manufacturer Part Number: LM3478MA
• Description: High Efficiency Low-side N-channel Controller For Switching Regulator
• Manufacturer: National Semiconductor Corporation

www.national.com
Order Number
Connection Diagram
Package Marking and Ordering Information
Pin Descriptions
LM3478MAX
LM3478MA
Pin Name
COMP
AGND
PGND
FA/SD
SO-8
SO-8
I
DR
V
Package Type
SEN
FB
IN
Pin Number
LM3478MA
LM3478MA
Package Marking
1
2
3
4
5
6
7
8
Current sense input pin. Voltage generated across an external sense
resistor is fed into this pin.
Compensation pin. A resistor, capacitor combination connected to this
pin provides compensation for the control loop.
Feedback pin. The output voltage should be adjusted using a resistor
divider to provide 1.26V at this pin.
Analog ground pin.
Power ground pin.
Drive pin. The gate of the external MOSFET should be connected to
this pin.
Frequency adjust and Shutdown pin. A resistor connected to this pin
sets the oscillator frequency. A high level on this pin for longer than
30 µs will turn the device off. The device will then draw less than 10µA
from the supply.
Power Supply Input pin.
8 Lead SO–8 Package
1000 units on Tape and Reel
2500 units on Tape and Reel
2
Supplied As:
Description
30150602
Feature