LP38513_14 Datasheet, PDF (1/20 Pages) Texas Instruments – 3A Fast Response Ultra Low Dropout Linear Regulator

LP38513
www.ti.com
SNVS361C – JULY 2007 – REVISED MARCH 2009
LP38513-1.8 3A Fast Response Ultra Low Dropout Linear Regulator
Check for Samples: LP38513
FEATURES
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•2 Conversions from 2.5V Rail to 1.8V
• Stable with Ceramic Capacitors
• Low Ground Pin Current
• Load Regulation of 0.1% for 10 mA to 3A Load
Current
• 60 μA Typical Quiescent Current in Shutdown
Mode
• Specified Output Current of 3A
• Available in 5-Lead TO-220 and DDPAK/TO-263
Packages
• Specified V_OUT Accuracy of ±2.6% with T_J from
0°C to +125°C
• ERROR Flag Indicates V_OUT Status
• Over-Temperature and Over-Current
Protection
• −40°C to +125°C Operating T_J Range
APPLICATIONS
• Microprocessor Power Supplies
• GTL, GTL+, BTL, and SSTL Bus Terminators
• Power Supplies for DSPs
• SCSI Terminator
• Post Regulators
• Battery Chargers
• Other Battery Powered Applications
DESCRIPTION
The LP38513 fast response ultra low dropout linear
regulator operates from a +2.25V to +5.50V input
supply. This ultra low dropout linear regulator
responds very quickly to step changes in line or load
conditions, which makes it suitable for low voltage
microprocessor applications. Developed on a CMOS
process, with a PMOS pass transistor, the LP38513
has low quiescent current operation that is
independent of the output load current.
Ground Pin Current: Typically 12 mA at 3A load
current.
Disable Mode: Typically 60 µA quiescent current
when the Enable pin is pulled low.
ERROR Flag: The ERROR Flag goes low if V_OUT
falls more than typically 15% below the nominal
value.
Precision Output Voltage: A specified V_OUT
accuracy of ±2.6% with T_J from 0°C to 125°C.
Typical Application Circuit
V_IN
ON
V_EN
OFF
GND
C_IN
10 PF
Ceramic
IN
OUT
LP38513
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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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