WPN20R

REV A

3/2000

Page 3

THERMAL DERATING CURVE

SIMPLIFIED CIRCUIT DIAGRAM

Temperature (C)

-40

0

85

95

100

105

110

115

120

130

100

80

60

40

20

0

Ambient

Case

MECHANICAL

NOTES:

All dimensions are in inches (millimeters).

GRID: 0.100 inches (2.54 millimeters)

Pin Placement: Tolerance: ±0.015

Marked with: specific model ordered, date code,

job code.

MATERIAL: Units are encapsulated in a low

thermal resistance molding compound which

has excellent chemical resistance, wide

operating temperature range, and good

electrical properties under high humidity

environments. The encapsulant and outer shell

of the unit have UL94V-0 ratings. Lead material

is brass with a solder plated surface to allow

ease of solderability.

WPN20Rxxyzz

PIN SIDE DOWN

SIDE VIEW

PIN SIDE UP

0.425 + 0.00

(10.80 + 0.08)

0.150

(3.81)

0.040 + 0.002

(1.02 + 0.05)

0.015 + 0.003

(0.38 + 0.08)

1.990 + 0.005

(50.55 + 0.13)

1

2

3

4

5

6

7

8

Pin Function

Number

Singles

Duals

1

+VIN

+VIN

2

-VIN

-VIN

3

NO PIN

NO PIN

4

Remote On/Off

Remote On/Off

5

NO PIN

+VOUT

6

+VOUT

COMMON

7

-VOUT

-VOUT

8

TRIM

TRIM

PIN CONNECTIONS

Undervoltage Lockout Threshold Voltages

Nominal Input

Shutdown Low

Shutdown High

Voltage Range

Voltage (V1)

Voltage (V2)

OFF

ON

12

7

8.8

24

15.5

17

48

30

33

Specifications typical at TA=25°C, rated output current.

HYSTERESIS GRAPH

HYSTERESIS GRAPH