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LM3478MA/NOPB Datasheet(PDF) 3 Page - Texas Instruments

Part # LM3478MA/NOPB
Description  LM3478 High-Efficiency Low-Side N-Channel Controller for Switching Regulator
PDF  43 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM3478MA/NOPB Datasheet(HTML) 3 Page - Texas Instruments

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LM3478
www.ti.com
SNVS085X – JULY 2000 – REVISED DECEMBER 2017
Product Folder Links: LM3478
Submit Documentation Feedback
Copyright © 2000–2017, Texas Instruments Incorporated
5 Pin Configuration and Functions
8-Lead VSSOP-8 Package
3 Pins
Top View
8-Lead SOIC-8
3 Pins
Top View
Pin Functions
PIN
I/O
DESCRIPTION
NAME
NO.
ISEN
1
I
Current sense input pin. Voltage generated across an external sense resistor is fed into this pin.
COMP
2
I
Compensation pin. A resistor, capacitor combination connected to this pin provides compensation for the
control loop.
FB
3
I
Feedback pin. The output voltage should be adjusted using a resistor divider to provide 1.26 V at this pin.
AGND
4
G
Analog ground pin.
PGND
5
G
Power ground pin.
DR
6
O
Drive pin. The gate of the external MOSFET should be connected to this pin.
FA/SD
7
I
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.
VIN
8
P
Power Supply Input pin.



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