RH1085

1

rh1085fc

3A Low Dropout Positive

Adjustable Regulator

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

regulators. A 10μF 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.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

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

2

1

CASE

IS OUTPUT

ADJ

K PACKAGE

2-LEAD TO-3 METAL CAN

BOTTOM VIEW

DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

BURN-IN CIRCUIT

PACKAGE INFORMATION

RH1085

IN

OUT

ADJ

121Ω

1k

RH1085 BI

15V

–15V

CAPACITOR(S) NOT SHOWN

100% Thermal Limit Burn-In

PRECONDITIONING

Note: For ordering information contact LTC.

FINAL SPECIFICATIONS SUBJECT TO CHANGE

(Note 1)