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