SI9182

Si9182 Vishay Siliconix Micropower 250-mA CMOS LDO Regulator With Error Flag/Power-On-Reset FEATURES Low 105-mV Dropout at 250-mA Load Guaranteed 250-mA Output Current 500-mA Peak Output Current Capability Uses Low ESR Ceramic Output Capacitor Fast Load and Line Transient Response Only 100-mV(rms) Noise With Noise Bypass Capacitor D 1-mA Maximum Shutdown Current D Built-in Short Circuit and Thermal Protection D Out-Of-Regulation Error Flag (Power Good or POR) D D D D D D D Fixed 1.215-V, 1.5-V, 1.8-V, 2.0-V, 2.5-V, 2.8-V, 2.85-V, 2.9-V, 3.0-V, 3.3-V, 5.0-V, or Adjustable Output Voltage Options D Other Output Voltages Available by Special Order APPLICATIONS D Cellular Phones D Laptop and Palm Computers D PDA, Digital Still Cameras DESCRIPTION The Si9182 is a 250-mA CMOS LDO (low dropout) voltage regulator. The device features ultra low ground current and dropout voltage to prolong battery life in portable electronics. The Si9182 offers line/load transient response and ripple rejection superior to that of bipolar or BiCMOS LDO regulators. The device is designed to maintain regulation while delivering 500-mA peak current. This is useful for systems that have high surge current upon turn-on. The Si9182 is designed to drive the lower cost ceramic, as well as tantalum, output capacitors. The device is guaranteed stable from maximum load current down to 0-mA load. In addition, an external noise bypass capacitor connected to the device’s CNOISE pin will lower the LDO’s output nois...