PIN CONNECTION (Top view)

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N

°

NAME

FUNCTION

1

SUPPLY VOLTAGE

Unregulated voltage input. An internal regulator powers the

internal logic.

2

FEEDBACK INPUT

The feedback terminal of the regulation loop. The output is

connected directly to this terminal for 5.1V operation; it is

connected via a divider for higher voltages.

3

FREQUENCY

COMPENSATION

A series RC network connected between this terminal and

ground determines the regulation loop gain characteristics.

4

GROUND

Common ground terminal.

5

OSCILLATOR

A parallel RC network connected to this terminal determines the

switching frequency.

6

SOFT START

Soft start time constant. A capacitor is connected between this

terminal and ground to define the soft start time constant. This

capacitor also determines the average short circuit output

current.

7

OUTPUT

Regulator output.

PIN FUNCTIONS

Symbol

Parameter

Value

Unit

Input voltage

50

V

Input to output voltage difference

50

V

Negative output DC voltage

-1

V

Negative output peak voltage at t = 0.1

µs; f = 100KHz

-5

V

Voltage at pin 3 and 6

5.5

V

Voltage at pin 2

7V

Pin 3 sink current

1

mA

Pin 5 source current

20

mA

≤ 90°C15

W

Junction and storage temperature

-40 to 150

°C

ABSOLUTE MAXIMUM RATINGS

L4960