GENERAL DESCRIPTION
The SG2003/A and SG2004/A low-power, low-noise, low-dropout, CMOS linear voltage regulators operate from a 2.5V to 5.5V input and deliver up to 400mA (400mA peak SG2003 only). They are the perfect choice for low voltage, low power applications. An ultra low ground current (120µA at 400mA output) make them attractive for battery operated power systems. The SG2003/A and SG2004/A series also offer ultra low dropout voltage (280mV at 400mA output) to prolong battery life in portable electronics. Systems requiring a quiet voltage source, such as RF applications, will benefit from the SG2003/A and SG2004/A series’ ultra low output noise (30µVRMS). An
external noise bypass capacitor connected to the device’s BP pin can further reduce the noise level.

FEATURES
- Low Output Noise: 30µVRMS typ(10Hz to 100KHz)
- Ultra-Low Dropout Voltage: 280mV at 400mA output
- Low 77µA No-Load Supply Current
- Low 120µA Operating Supply Current at 400mA Output
- Thermal-Overload Protection
- Output Current Limit
- Preset Output Voltages (±1.6% Accuracy)
- 10nA Logic-Controlled Shutdown
- Available in Multiple Output Voltage Versions Fixed Outputs of 2.5V, 2.8V, 2.85V, 3.0V, and 3.3V Adjustable Output from 1.5V to 4.5V

APPLICATIONS
Cellular Telephones
Cordless Telephones
PHS Telephones
PCMCIA Cards
Modems
MP3 Players
Hand-Held Instruments
Palmtop Computers
Electronic Planners
Portable/Battery-Powered Equipment