1FEATURES

2• 2.25V to 5.5V Input Voltage Range

• 1.8V Fixed Output Voltage

• 800 mA Output Load Current

• +/- 2.5% VOUT Accuracy over Line, Load, and

Full-Temperature Range from -40°C to +125°C

• Stable with tiny 10 μF Ceramic Capacitors

• 0.20% Output Voltage Load Regulation from 10

mA to 800 mA

• Enable pin

• Error Flag Indicates Status of Output Voltage

• 1 μA of Quiescent Current in Shutdown

• 40dB of PSRR at 100 kHz

• Over-Temperature and Over-Current

Protection

• DDPAK/TO-263 and PFM Surface Mount

Packages

APPLICATIONS

• Digital Core ASICs, FPGAs, and DSPs

• Servers

• Routers and Switches

• Base Stations

• Storage Area Networks

• DDR2 Memory

DESCRIPTION

The LP38511-1.8 Fast-Transient Response Low-

Dropout Voltage Regulator offers the highest-

performance in meeting AC and DC accuracy

requirements for powering Digital Cores. The

LP38511-1.8 uses a proprietary control loop that

enables extremely fast response to change in line

conditions and load demands. Output Voltage DC

accuracy is specified at ±2.5% over line, load and full

temperature range from -40°C to +125°C. The

LP38511-1.8 is designed for inputs from the 2.5V,

3.3V, and 5.0V rail, is stable with 10uF ceramic

capacitors, and has a fixed 1.8V output. An Error Flag

feature monitors the output voltage and notifies the

system processor when the output voltage falls more

than 15% below the nominal value. The LP38511-1.8

provides excellent transient performance to meet the demand of high performance digital core ASICs,

DSPs, and FPGAs found in highly-intensive

applications such as servers, routers/switches, and

base stations.