Radiation Hardened Adjustable 0.9A Single Resistor Low Dropout Regulator

The RH3080 is a 0.9A low dropout linear regulator with a unique architecture featuring a precision current source and voltage follower which allows the output to be programmed to any voltage between zero and 36V. Multiple regulators can be paralleled to increase total output current and spread heat over a system PC board with no need for heat sinking. The pass transistor collector can be brought out independently of the circuit supply voltage to allow dropout voltage to approach the saturation limit of the pass transistor. A small 2.2μF capacitor on the output with an ESR of less than 0.5Ω is adequate to insure stability. Applications with large output load transients require a larger output capacitor value to minimize output voltage change. Input circuitry insures output safe operating area current limiting and thermal shutdown protection. The rated output current of an RH3080-based part is fixed by internal wire length/resistance. Our dice element evaluations are based on parts rated for 0.9A output current.

Third Party Vendor Availability Analog Devices partners with third party vendors who assemble and test packaged products with RH Dice inside.

For MSK prefix products please click on the Part Number in the table below and scroll down the linked page to find the part number.

Part Number

Description

SCD or SMD#

MSK5979RH

0.9A Adjustable, LDO Regulator Split Bias

-

MSK5978RH

0.7A Adjustable, LDO Regulator, Split Bias

-

MSK5953RH

Dual 1A Adjustable LDO Regulator, Split Bias

-

MSK5980RH

0.7A Adjustable, LDO Regulator, Split Bias (Replaces MSK5978RH)

-

VRG8666

1A Adjustable LDO Regulator, Split Bias

View

VRG8667

Dual 1A Adjustable LDO Regulator, Split Bias

View

VRG8668

Dual 1A Adjustable LDO Regulator, Split Bias

View

Applications

* High Efficiency Linear Regulators

* Constant Voltage/Current Regulators

* Programmable Current Source/Sink

* Space System Power Supplies

* Switching Power Supply Post Regulators

* Very Low Voltage Power Supplies

* MIL-PRF-38535 Class V Compliant Dice

* Outputs May be Paralleled for Higher Current and Heat Spreading

* Output Current: 0.9A

* Single Resistor Programs Output Voltage

* 2% Initial Accuracy of SET Pin Current

* Output Adjustable to 0V

* Low Output Noise: 40μVRMS (10Hz to 100kHz)

* Wide Input Voltage Range: 1.2V to 36V

* Low Dropout Voltage: 270mV at 0.5A load current

* <0.005%/V Line Regulation

* Minimum Load Current: 0.6mA

* Stable with 2.2μF Minimum Ceramic Output Capacitor

* Current Limit with Foldback and Overtemperature Protected