SA57026

INTEGRATED CIRCUITS SA57026 300 mA LDO with ON/OFF control and independent delayed RESET function Product data Supersedes data of 2001 Oct 03 2003 Oct 13 Philips Semiconductors Philips Semiconductors Product data 300 mA LDO with ON/OFF control and independent delayed RESET function SA57026 GENERAL DESCRIPTION The SA57026 has an extremely precise fixed output with a typical accuracy of ±2%. It is designed to provide very low dropout and low noise in CD-ROM drives, battery-operated systems, and portable computers applications. This regulator consists of an internal voltage reference, an error amplifier, a driver with current limiter, and a thermal shut-down mechanism. An Active-LOW RESET is assered when the detected voltage (VDET) falls below the reset voltage threshold. The RESET output remains low for 30 µs (typical) when zero capacitance connected to Cd pin. The reset time delay can be adjusted by replacing cpacitance values from Cd pin to Ground. The device is available in the 7-pin small outline package (SOP002). FEATURES Very low dropout voltage: 500 mV typ. (Iout = 50 mA) High precision output voltage: ±2% Output current capacity: 300 mA Low noise: 40 mVrms typ. @ 20 Hz to 80 KHz and for Cn = 10 nF Extremely good line regulation: 10 mV typical Extremely good load regulation: 20 mV typical Low temperature drift co-efficient to Vout: ±100 ppm/°C Internal current limit and thermal shut-down circuits Adjustment-free reset detection voltage: 4.2 V t...