LP2951

150mA ADJUSTABLE VOLTAGE REGULATOR March 17, 1998 LP2951 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION The LP2951 series of low power voltage regulators have low quiescent current and low dropout voltage. The quiescent current increases minimally during dropout conditions thereby extending battery life. Available in the 8 lead SOIC package, the LP2951 series includes features such as shutdown and low output voltage detect (typically due to low battery conditions). This function may also be used as a power on reset function when triggered by CMOS or TTL inputs. The circuit can be used as a fixed voltage 5 volt (3.3 volt for LP2951CM-3.3) regulator or adjusted between 1.24 volts and 29 volts using external resistor pairs. FEATURES = Guaranteed 150mA current = Adjustable output voltage - 1.24V to 29V = Accurate 5V or 3.3V output @ 100mA = Low dropout voltage - 350-400mV @ 100mA = Regulator or reference functions = Direct replacement for LP2951C, MIC2951-03, AS2951C BLOCK DIAGRAM APPLICATIONS = Microcontroller supplies = Linear regulators = Adjustable Supplies = Switching power supplies - post-regulation = Portable modems = Battery powered systems = Cellular telephones = Voltage references ORDERING INFORMATION DEVICE (1)(2) OUTPUT ADJ PACKAGE SO-8 LP2951CM-X.X Notes: (1) Where -X.X denotes voltage options. Available voltages are: 3.3V (-3.3) and 5V (leave blank). (2) Add suffix ‘TR’ for tape and reel. ABSOLUTE MAXIMUM RATINGS Pa...