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LM3478 Datenblatt(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Teilenummer LM3478
Bauteilbeschribung  High Efficiency Low-Side N-Channel Controller for Switching Regulator
PDF  21 Pages
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Hersteller  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3478 Datenblatt(HTML) 2 Page - National Semiconductor (TI)

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Connection Diagram
10135502
8 Lead Mini SO8 Package (MSOP-8 Package)
Package Marking and Ordering Information
Order Number
Package Type
Package Marking
Supplied As:
LM3478MM
MSOP-8
S14B
1000 units on Tape and
Reel
LM3478MMX
MSOP-8
S14B
3500 units on Tape and
Reel
Pin Description
Pin Name
Pin Number
Description
I
SEN
1
Current sense input pin. Voltage generated across an external
sense resistor is fed into this pin.
COMP
2
Compensation pin. A resistor, capacitor combination connected to
this pin provides compensation for the control loop.
FB
3
Feedback pin. The output voltage should be adjusted using a
resistor divider to provide 1.26V at this pin.
AGND
4
Analog ground pin.
PGND
5
Power ground pin.
DR
6
Drive pin of the IC. The gate of the external MOSFET should be
connected to this pin.
FA/SD
7
Frequency adjust and Shutdown pin. A resistor connected to this
pin sets the oscillator frequency. A high level on this pin for
≥ 30µs
will turn the device off. The device will then draw less than 10µA
from the supply.
V
IN
8
Power Supply Input pin.
www.national.com
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