The LP5900 is a linear regulator capable of supplying 150 mA output current. Designed to meet the requirements of RF/Analog circuits, the LP5900 device provides low noise, high PSRR, low quiescent current, and low line transient response figures. Using new innovative design techniques the LP5900 offers class-leading device noise performance without a noise bypass capacitor. The device is designed to work with 0.47 μF input and output ceramic capacitors. (No Bypass Capacitor is required) The device is available in micro SMD package and LLP package. For all other package options contact your local NSC sales office. This device is available with 1.5V,1.575V, 1.8V, 1.9V, 2.0V, 2.1V, 2.2V, 2.3V, 2.5V, 2.6V, 2.7V, 2.75V 2.8V, 2.85V 3.0V, and 3.3V outputs. Please contact your local sales office for any other voltage options.
The LP5900 linear regulator provides 150 mA output current with ultra‑low noise (6.5 µV rms) and high power‑supply rejection (75 dB at 1 kHz). It operates from 2.5 V to 5.5 V input and delivers selectable output voltages from 1.5 V to 3.3 V without the need for a noise bypass capacitor. The device includes logic‑controlled enable, thermal‑overload and short‑circuit protection, and works over a –40 °C to +125 °C junction temperature range.
The regulator is offered in a 4‑bump micro‑SMD package and a 6‑pin LLP (SC‑70) package. Recommended external capacitors are 0.47 µF ceramic types placed close to the pins. Detailed electrical characteristics, absolute maximum ratings, and application hints are provided for designers of RF/analog circuits, cellular phones, PDA handsets, and wireless LAN devices.
| Output voltage range | 1.5 V to 3.3 V |
|---|---|
| Maximum output current | 150 mA |
| Low dropout voltage | 80 mV typ. |
| Power‑supply rejection ratio (PSRR) | 75 dB at 1 kHz |
No, the LP5900 is designed to operate without a noise bypass capacitor.
A 0.47 µF ceramic capacitor should be connected between the input pin and ground.
The start‑up time to 95 % of the output voltage is about 150 µs.
The LP5900 can supply up to 150 mA of output current.