IC
Low Dropout Linear Regulator
uP8808
Ultra Low Noise, Fast Response, High PSRR 1A Low Dropout Linear Regulator
Datasheets PDF
General Description
The uP8808 is an ultra low noise, fast response, high power supply rejection ratio (PSRR) low dropout regulator specifically designed to continuously deliver up to 1A output current. Designed with a P-channel MOSFET series pass transistor, the uP8808 yields extremely low dropout voltage (e.g. 240mV at 1A) and maintains very low ground current (200uA).
The uP8808 is designed and optimized to work with lowvalue, low-cost ceramic capacitors. Only a 10uF ceramic output capacitor is required for stable operation for any load conditions, ideal suitable for portable RF and wireless applications where PCB size are specially concerned. A bypass pin is provided to reduce output noise voltage and improve PSRR to 40dB at 100kHz.
Other features include foldback overcurrent protection, quick soft start, and overtemperature protection. The uP8808 is available in fixed output voltage from 0.8V to 3.3V with 0.1V per step. The device comes in PSOP-8L, SOT23-5L, TSOT223-3L, WDFN3x3-8L and VQFN5x5-24L packages.
Pin Configuration & Typical Application Circuit
PSOP-8L
SOT23-5L
(T)SOT223-3L(uP8808A)
(T)SOT223-3L(uP8808B)
WDFN3x3-8L
VQFN5x5-24L
Feature
- Wide Input Voltage Range from 2.5 to 5.5V.
- Ultra Low Dropout Voltage: 240mV @ 1A.
- High Power Supply Rejection Ratio
- 60dB at 100Hz.
- 40dB at 100kHz.
- Ultra Low Output Noise Voltage: 100uV(RMS).
- Ultra Fast Response to Line/Load Transient.
- Low Ground Current: 200uA.
- Low Shutdown Current: < 1uA.
- Foldback Output Current Limit.
- High Output Accuracy.
- 1.5% Initial Accuracy.
- Fixed Output Voltages: 0.8V to 3.3V with 0.1V Per Step.
- Over-Temperature Protection.
- RoHS Compliant and Halogen Free.
Application
- Cellular and Cordless Phones.
- Bluetooth Portable Radios and Accessaries.
- Battery-Powered Equipments.
- Laptop, Palmtops, Notebook Computers.
- Hand-Held Instruments.
- PCMCIA Cards.
- Portable Information Appliances.