• Input Supply Voltage 2.25 V to 5.5 V
• Conversions from 2.5-V Rail to 1.8-V Rail
• Stable with Ceramic Capacitors
• Low Ground Pin Current
• Load Regulation of 0.1% for 10 mA to 3-A Load Current
• 60-μA Typical Quiescent Current in Shutdown Mode
• Specified Output Current of 3 A
• Specified VOUT Accuracy of ±2.6% With TJ from 0°C to +125°C
• ERROR Flag Indicates VOUT Status
• Overtemperature and Overcurrent Protection
• −40°C to +125°C Operating TJ Range

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

The LP38513 fast-response ultra-low dropout linear regulator operates from a 2.25-V to 5.5-V input supply. This device responds very quickly to step changes in line or load conditions, making it suitable for low-voltage microprocessor applications. Developed on a CMOS process, with a PMOS pass transistor, the LP38513 has low quiescent-current operation independent of the output load current.

• Ground Pin Current: Typically 12 mA at 3-A load current.
• Disable Mode: Typically 60 µA quiescent current when the enable (EN) pin is pulled low.
• ERROR Flag: The ERROR flag goes low if VOUT falls more than typically 15% below the nominal value.
• Precision Output Voltage: A specified VOUT accuracy of ±2.6% with TJ from 0°C to 125°C.