Preliminary

HIGH TEMPERATURE POSITIVE

LINEAR REGULATOR

HTPLREG

• Down-Hole Well

• Avionics

• Turbine Engine Control

• Industrial Process Control

• Nuclear Reactor

• Electric Power Conversion

• Heavy Duty Internal Combustion Engines

• Specified Over -55 to +225

°C

• Output Current up to 500 mA

• Calibrated +15, +12, +10, and +5V Output

• Input Voltage up to 28V

• 1.5 mA Quiescent Current

• Current Limit Short Circuit Protection

• Hermetic 4-Pin Power Package

FEATURES

APPLICATIONS

The HTPLREG is a hybrid linear regulator designed to

operate over an extremely wide temperature range of -55

to +225

°C. The regulator's control circuit is fabricated with

Honeywell’s dielectrically isolated high-temperature (HT-

MOS™) process. A silicon-on-insulator MOSFET is the

power device. The HTPLREG is designed specifically for

severe high-temperature applications such as down-hole

oil well, aerospace, turbine engine and industrial control.

GENERAL DESCRIPTION

Solid State Electronics Center • 12001 State Highway 55, Plymouth, MN 55441 • (800) 323-8295 • http://www.ssec.honeywell.com

The HTPLREG is available with a calibrated +5, +12, +10, or

+15V output. Output current is 500 mA over the specified

temperature range, while quiescent current is 1.5 mA. Internal

short circuit protection is provided. All parts are burned in to

eliminate infant mortality. The HTPLREG is a high-reliability

part designed specifically for applications with an extremely

wide operating temperature range.

FUNCTIONAL DIAGRAM

Control Chip

Current

Sense

Resistor

Application

Load

Nch Power

FET

Gate

Drain

Source

(Shutdown

Input)

VIN

GND

VSENSE

VOUT

VGATE

Vin

Pin 1

NSHDN

Pin 3

& case

Gnd

Vout

Pin 4

HTPLREG MCM

Pin 2

HTPLREG