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LM3488 Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM3488
Description  High Efficiency Low-Side N-Channel Controller for Switching Regulators
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3488 Datasheet(HTML) 2 Page - National Semiconductor (TI)

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Connection Diagram
10138802
8 Lead Mini SO8 Package (MSOP-8 Package)
Package Marking and Ordering Information
Order Number
Package Type
Package Marking
Supplied As:
LM3488MM
MSOP-8
S21B
1000 units on Tape and Reel
LM3488MMX
MSOP-8
S21B
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/SYNC/SD
7
Frequency adjust, synchronization, and Shutdown pin. A resistor
connected to this pin sets the oscillator frequency. An external
clock signal at this pin will synchronize the controller to the
frequency of the clock. 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
2


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