LP3855ES-1.8/NOPB

The LP3852 and LP3855 series of fast ultra-low dropout linear regulators operate from a 2.5-V to 7-V input supply. A wide range of preset output voltage options are available. These ultra-low dropout linear regulators respond very quickly to step changes in load, which makes them suitable for low voltage microprocessor applications. The LP3852 and LP3855 are developed on a CMOS process which allows low quiescent-current operation independent of output load current, typically 4 mA at 1.5-A load current. This CMOS process also allows the LP3852 and LP3855 to operate under extremely low dropout conditions, typically 24 mV at 150-mA load current and 240 mV at 1.5-A load current. The LP3852 has an ERROR pin; it goes low when the output voltage drops 10% below nominal value. The LP3855 has a SENSE pin to improves regulation at remote loads. The LP3852 and LP3855 are available with fixed output voltages from 1.8 V to 5 V with a specified accuracy of ±1.5% at room temperature, and ±3% over all conditions (varying line, load, and temperature).

Applications

• Microprocessor Power Supplies
• GTL, GTL+, BTL, and SSTL Bus Terminators
• Power Supplies for DSPs
• SCSI Terminator
• Post Regulators
• High Efficiency Linear Regulators
• Battery Chargers
• Other Battery Powered Applications

Key features

• Input Supply Voltage: 2.5 V to 7 V
• Ultra-Low Dropout Voltage
• Stable with Selected Ceramic Capacitors
• Low Ground-Pin Current
• Load Regulation of 0.06%
• 10-nA Quiescent Current in Shutdown Mode
• Specified Output Current of 1.5 A
• DC Output Voltage Accuracy ± 1.5%
• ERROR Pin Indicates Output Status
• SENSE Option Improves Load Regulation
• Overtemperature/Overcurrent Protection
• -40°C to 125°C Junction Temperature Range