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National Semiconductor LP2989 Micropower/Low Noise 500 mA Ultra Low‑Dropout Datasheet
The LP2989 is a fixed‑output 500 mA precision LDO regulator designed for use with ceramic output capacitors. It offers ultra‑low dropout voltage, very low output noise, and a shutdown mode that draws less than 0.8 pA. The device provides 0.75 % output voltage accuracy (A‑grade) and operates over a wide supply range up to 16 V.
The regulator is available in SO‑8, Mini SO‑8, and 8‑lead LLP surface‑mount packages. The document includes connection diagrams, ordering information for multiple voltage grades, absolute maximum ratings, electrical characteristics, physical dimensions, and a life‑support policy disclaimer.
National Semiconductor LP2989 specifications
| Dropout Voltage (500 mA) | 310 mV (typical) |
|---|---|
| Ground Pin Current (500 mA) | 3 mA (typical) |
| Output Voltage Accuracy (A‑grade) | 0.75 % |
| Maximum Supply Voltage | 16 V |
| Operating Temperature Range | -40 °C to +125 °C |
| Package Types | SO‑8, Mini SO‑8, 8‑Lead LLP |
| Peak Output Current | 800 mA (typical) |
Source: National Semiconductor LP2989 Micropower/Low Noise 500 mA Ultra Low‑Dropout Datasheet
All National Semiconductor LP2989 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the typical dropout voltage at 500 mA load?
The typical dropout voltage is 310 mV at a 500 mA load.
From: National Semiconductor LP2989 Micropower/Low Noise 500 mA Ultra Low‑Dropout Datasheet
What is the output voltage accuracy for the A‑grade version?
The A‑grade version provides 0.75 % output voltage accuracy.
From: National Semiconductor LP2989 Micropower/Low Noise 500 mA Ultra Low‑Dropout Datasheet
What is the dropout voltage of the LP2989?
The typical dropout voltage is 310 mV at a 500 mA load.
How much quiescent current does the LP2989 draw in sleep mode?
In sleep mode the device draws less than 0.8 pA of quiescent current.