The LP3961/LP3964 series of fast ultra low-dropout linear regulators operate from a +2.5V to +7.0V input supply. Wide range of preset output voltage options are available. These ultra low dropout linear regulators respond very fast to step changes in load which makes them suitable for low voltage microprocessor applications. The LP3961/LP3964 are de- veloped on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3961/LP3964 to operate under extremely low dropout conditions.
The LP3961/LP3964 series are fast ultra‑low dropout linear regulators that operate from a +2.5 V to +7.0 V input supply. They offer a wide range of preset output voltages (1.2 V to 5.0 V, adjustable) and include features such as an error‑flag output, remote sense pin, and very low ground‑pin current.
The document provides electrical characteristics, absolute maximum ratings, package options (SOT‑223, TO‑263, TO‑220), ordering information, and a life‑support policy. Typical application circuits and block diagrams illustrate how the devices can be used in microprocessor power supplies, DSPs, battery‑powered systems, and other low‑voltage applications.
| Output Current | 800 mA |
|---|---|
| Dropout Voltage (800 mA) | 240 mV |
| Ground Pin Current (800 mA) | 4 mA |
| Shutdown Mode Quiescent Current | 15 yA |
| Input Voltage Range | +2.5 V to +7.0 V |
| Output Voltage Options | 1.2 V to 5.0 V (adjustable) |
| Package Types | SOT‑223, TO‑263, TO‑220 |
The dropout voltage is typically 240 mV at an 800 mA load.
Shutdown mode draws a typical quiescent current of 15 yA.
They operate from a +2.5 V to +7.0 V input supply.
The ground pin current is typically 4 mA at an 800 mA load.