LM3478MM National Semiconductor, LM3478MM Datasheet - Page 2

• Manufacturer Part Number: LM3478MM
• Description: Pulse Width Modulation (PWM) Controller IC
• Manufacturer: National Semiconductor

Specifications of LM3478MM

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Mounting Type: Surface Mount
• Features: High Efficiency
• Package / Case: 8-MSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Connection Diagram
Package Marking and Ordering Information
Pin Description
Pin Name
COMP
FA/SD
AGND
PGND
I
SEN
DR
V
FB
Order Number
IN
LM3478MMX
LM3478MM
Pin Number
1
2
3
4
5
6
7
8
8 Lead Mini SO8 Package (MSOP-8 Package)
Package Type
MSOP-8
MSOP-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 of the IC. 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 ≥ 30µs
will turn the device off. The device will then draw less than 10µA
from the supply.
Power Supply Input pin.
2
Package Marking
S14B
S14B
10135502
Description
1000 units on Tape and
3500 units on Tape and
Supplied As:
Reel
Reel