3.3 - 1

3.3

Three Terminal, Precision Adjustable

Negative Voltage Regulator In TO-257 Package

809R0

(COTS) COMMERCIAL OFF-THE-SHELF 1.5 AMP NEGATIVE,

ADJUSTABLE VOLTAGE REGULATOR IN TO-257 PKG

COM137T

FEATURES

• Built In Thermal Overload Protection

• Short Circuit Current Limiting

DESCRIPTION

These three terminal negative regulators are supplied in hermetically sealed pack-

ages. All protective features are designed into the circuit, including thermal shutdown,

current-limiting, and safe-area control.

With heat sinking, these devices can deliver

up to 1.5 amps of output current. The unit also features output voltages that can be

fixed from -1.2 volts to -37 volts using external resistors.

Power Dissipation

TO-257................... ...... .... ...........................

. 20 W

Input - Output Voltage Differential.................................... 40

V Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . - 55°C to + 150°C

Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65°C to + 150°C

Lead Temperature (Soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .

300°C

Thermal Resistance, Junction to Case: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W

MaximumOutputCurrent: ................ ............................

1.5 A

Recommended Operating Conditions:

Output VoltageRange.......................................-1.2to-

37 VDC

Ambient Operating Temperature Range (T

5°Cto+

125°C

Input VoltageRange ....................................-4.25to-41.25