LM3488, LM3488-Q1

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SNVS089N – JULY 2000 – REVISED DECEMBER 2014

5 Pin Configuration and Functions

8-Pin DGK

VSSOP Package

Top View

Pin Functions

PIN

TYPE

DESCRIPTION

NAME

NO.

1

I

Current sense input pin. Voltage generated across an external sense resistor is fed into this pin.

COMP

2

A

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

P

Analog ground pin.

PGND

5

P

Power ground pin.

DR

6

O

Drive pin of the IC. The gate of the external MOSFET should be connected to this pin.

FA/SYNC/S

7

A

Frequency adjust, synchronization, and Shutdown pin. A resistor connected to this pin sets the oscillator

D

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

≥ 30 µs will turn the device off. The device will then draw less than 10µA from

the supply.

8

P

Power supply input pin.

6 Specifications

6.1 Absolute Maximum Ratings

(1)

MIN

MAX

UNIT

Input voltage

45

V

FB pin voltage

V

FA/SYNC/SD pin voltage

V

Peak driver output current (< 10 µs)

1

A

Power dissipation

Internally Limited

Junction temperature

150

°C

Lead temperature

Vapor Phase (60 s)

215

°C

Infared (15 s)

260

°C

DR pin voltage

−0.4 ≤ VDR

VDR

≤ 8

V

600

mV

(1)

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Recommended Operating Conditions are

conditions under which operation of the device is intended to be functional. For specifications and test conditions, see the Electrical

Characteristics.

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