Analog Devices Inc. LT308x Adjustable Single Resistor LDOs
Analog Devices Inc. LT308x adjustable single resistor low dropout linear regulators (LDOs) can be paralleled to increase output current or spread heat in surface-mounted boards. Architected as a precision current source and voltage follower allows the regulators to be used in many applications requiring high current, adjustability to zero, and no heat sink. The devices bring out the collector of the pass transistor to allow low dropout operation when used with multiple supplies.
A key feature of Analog Devices Inc. LT308x adjustable LDOs is the capability to supply a wide output voltage range. By using a reference current through a single resistor, the output voltage is programmed to any level between zero and 23V (LT3083) or 36V (LT3080). The component is stable with 10µF (LT3083) or 2.2μF (LT3080) of capacitance on the output. The IC uses small ceramic capacitors that do not require additional ESR. Internal protection circuitry includes current limiting and thermal limiting.
Features
- Outputs may be paralleled for higher current and heat spreading
- Output Current
- 1.1A (LT3080)
- 3A (LT3083)
- Single resistor programs output voltage
- Output adjustable to 0V
- 40μVRMS (10Hz to 100kHz) output noise
- Current limit with foldback and overtemperature protected
- <0.001%/V line regulation
Applications
- High current surface mount supplies
- High-efficiency linear regulator
- Post regulator for switching supplies
- Low parts count variable voltage supply
- Low output voltage power supplies
Related Products
Analog Devices Inc. LDO Linear Regulators
A broad line of high-performance low-dropout linear regulators (LDO).
Analog Devices Inc. Positive Linear LDO Regulators
High-performance LDOs with a wide input voltage range from 0.9V to 80V.
Analog Devices Inc. Extended Temperature (H&MP) Linear Regulators
Offer several options for applications requiring extended temperature operation.