LP3997

LP3997 www.ti.com SNVS272B – MAY 2004 – REVISED MAY 2013 Micropower 250-mA CMOS LDO Regulator With Error Flag and Power-On-Reset Check for Samples: LP3997 FEATURES 1 2 Low 140-mV Dropout at 250-mA Load Stable With Ceramic Capacitor. Low Noise With Bypass Capacitor Less Than 80 µA Typical IQ at 250 mA Virtually Zero IQ (Disabled) Thermal and Short Circuit Protection 3.3-V Output (1) 8-Lead VSSOP Package (2) APPLICATIONS Portable Consumer Electronics Cellular Handsets Laptop and Palm Computers PDAs Digital Cameras (1) For other voltage options, contact your TI sales office (2) For other package options, contact your TI sales office. DESCRIPTION The LP3997 regulator is designed to meet the requirements of portable, battery-powered systems, providing accurate output voltage, low noise, and low quiescent current. The LP3997 provides 3.3V output at up to 250mA load current. The chip architecture is capable of providing output voltages as low as 0.8V. When switched in shutdown mode, the power consumption is virtually zero. The LP3997 is designed to be stable with space saving ceramic output capacitor as small as 1µF. The LP3997 also includes an out-of-regulation error flag. When the output is more than 5% below its nominal voltage, the error flag sets to low. If a capacitor is connected to device’s delay pin, a delayed power-on reset signal will be generated. Typical Application Circuit VIN Enable 2.2 PF 4 VIN 5 VOUT 8 SD 6 SENSE LP3997 470k 2 D...