1

RH1085

3A Low Dropout

Positive Adjustable Regulator

Power Dissipation .............................. Internally Limited

Input-to-Output Voltage Differential ......................... 30V

Operating Junction Temperature Range

Control Section ............................. – 55

°C to 150°C

Power Transistor ............................ – 55

°C to 200°C

Storage Temperature Range ................. – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

The RH1085 positive adjustable regulator is designed to

provide 3A with higher efficiency than currently available

devices. All internal circuitry is designed to operate down

to 1V input-to-output differential and the dropout voltage

is fully specified as a function of load current. Dropout is

guaranteed at a maximum of 1.5V at maximum output

current, decreasing at lower load currents. On-chip trim-

ming adjusts the output voltage to 1%. Current limit is also

trimmed, minimizing the stress on both the regulator and

power source circuitry under overload conditions.

The RH1085 is pin compatible with older 3-terminal regu-

lators. A 10

μF output capacitor is required on these new

device. However, this is usually included in most regulator

designs.

The wafer lots are processed to Linear Technology

Corporation’s in-house Class S flow-to-yield circuits

usable in stringent military applications.

100% Thermal Limit Burn-In

RH1085

IN

OUT

ADJ

121

Ω

1k

RH1085 BI

15V

–15V

CAPACITOR(S) NOT SHOWN

2

1

CASE

IS OUTPUT

ADJ

K PACKAGE

2-LEAD TO-3 METAL CAN

BOTTOM VIEW

Note: For ordering information contact LTC.

FINAL SPECIFICATIONS SUBJECT TO CHANGE

DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

PRECONDITIONING

PACKAGE INFORMATION

BURN-IN CIRCUIT

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.