LP38503-ADJ_15 Datasheet, PDF (1/27 Pages) Texas Instruments – LP3850x-ADJ, LP3850xA-ADJ 3-A FlexCap Low Dropout Linear Regulator for 2.7-V to 5.5-V Inputs

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LP38501-ADJ, LP38503-ADJ
SNVS522I – AUGUST 2007 – REVISED AUGUST 2015
LP3850x-ADJ, LP3850xA-ADJ 3-A FlexCap Low Dropout Linear Regulator for
2.7-V to 5.5-V Inputs
1 Features
•1 Input Voltage: 2.7 V to 5.5 V
• Adjustable Output Voltage: 0.6 V to 5 V
• FlexCap: Stable with Ceramic, Tantalum, or
Aluminum Capacitors
• Stable With 10-µF Input and Output Capacitors
• Low Ground-Pin Current
• 25-nA Quiescent Current in Shutdown Mode
• Ensured Output Current of 3 A
• Ensured V_ADJ Accuracy of ±1.5% at 25°C (A
Grade)
• Ensured Accuracy of ±3.5% at 25°C (STD)
• Overtemperature and Overcurrent Protection
• ENABLE (EN) Pin (LP38501 only)
• –40°C to +125°C Operating Temperature Range
2 Applications
• ASIC Power Supplies In:
– Printers, Graphics Cards, DVD Players
– Set Top Boxes, Copiers, Routers
• DSP and FPGA Power Supplies
• SMPS Regulator
• Conversion from 3.3-V or 5-V Rail
3 Description
TI's FlexCap low-dropout (LDO) linear regulators
feature unique compensation that allow use of any
type of output capacitor with no limits on minimum or
maximum equivalent series resistance (ESR). The
LP38501 and LP38503 series of LDOs operate from
a 2.7-V to 5.5-V input supply. These ultra-low-dropout
linear regulators respond very quickly to step
changes in load, making them suitable for low-voltage
microprocessor applications. Developed on a CMOS
process (utilizing a PMOS pass transistor) the
LP38501-ADJ and LP38503-ADJ have low quiescent
currents that change little with load current.
• GND Pin Current: Typically 2 mA at 3-A load
current.
• Disable Mode: Typically 25-nA quiescent current
when the EN pin is pulled low.
• Simplified Compensation: Stable with any type of
output capacitor, regardless of ESR.
• Precision Output: A grade versions available with
1.5% V_ADJ tolerance (25°C) and 3% over line,
load, and temperature.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP38501
LP38503
DDPAK/TO-263 (5) 10.16 mm x 8.42 mm
TO-263 (5)
10.16 mm x 9.85 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuits
*Minimum capacitance required (see Application and Implementation).
*Minimum capacitance required (see Application and Implementation).
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.