LP38511_14 Datasheet, PDF (1/19 Pages) Texas Instruments – 800 mA Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag

LP38511
www.ti.com
SNOSAU6D – NOVEMBER 2007 – REVISED MARCH 2009
LP38511-1.8 800 mA Fast-Transient Response Low-Dropout Linear Voltage Regulator with
Error Flag
Check for Samples: LP38511
FEATURES
1
•2 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
• DDPAK/TO-263 and PFM Surface Mount
Packages
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.
APPLICATIONS
• Digital Core ASICs, FPGAs, and DSPs
• Servers
• Routers and Switches
• Base Stations
• Storage Area Networks
• DDR2 Memory
Typical Application Circuit
V_IN
ON
OFF
V_EN
GND
C_IN
10 PF
Ceramic
IN
OUT
LP38511
EN
ERROR
GND
C_OUT
10 PF
Ceramic
10 k:
V_OUT
GND
V_ERROR
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007–2009, Texas Instruments Incorporated