LP38511_09 Datasheet, PDF (1/14 Pages) National Semiconductor (TI) – 800 mA Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag

LP38511-1.8
March 6, 2009
800 mA Fast-Transient Response Low-Dropout Linear
Voltage Regulator with Error Flag
General 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 guaran-
teed 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 nom-
inal value. The LP38511-1.8 provides excellent transient per-
formance to meet the demand of high performance digital
core ASICs, DSPs, and FPGAs found in highly-intensive ap-
plications such as servers, routers/switches, and base sta-
tions.
Features
■ ^{2.25V to 5.5V Input Voltage Range}
■ ^{1.8V Fixed Output Voltage}
■ ^{800 mA Output Load Current}
■ ^{+/- 2.5% V}_OUT ^{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}
■ ^{TO263 and TO-263 THIN Surface Mount Packages}
Applications
■ ^{Digital Core ASICs, FPGAs, and DSPs}
■ ^Servers
■ ^{Routers and Switches}
■ ^{Base Stations}
■ ^{Storage Area Networks}
■ ^{DDR2 Memory}
Typical Application Circuit
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