1 Features 3 Description

TI's FlexCap low-dropout (LDO) linear regulators 1• Input Voltage: 2.7 V to 5.5 V

feature unique compensation that allow use of any

• Adjustable Output Voltage: 0.6 V to 5 V type of output capacitor with no limits on minimum or

• FlexCap: Stable with Ceramic, Tantalum, or maximum equivalent series resistance (ESR). The

Aluminum Capacitors LP38501 and LP38503 series of LDOs operate from

a 2.7-V to 5.5-V input supply. These ultra-low-dropout • Stable With 10-μF Input and Output Capacitors

linear regulators respond very quickly to step

• Low Ground-Pin Current changes in load, making them suitable for low-voltage

• 25-nA Quiescent Current in Shutdown Mode microprocessor applications. Developed on a CMOS

• Ensured Output Current of 3 A process (utilizing a PMOS pass transistor) the

LP38501-ADJ and LP38503-ADJ have low quiescent • Ensured VADJ Accuracy of ±1.5% at 25°C (A currents that change little with load current. Grade)

• GND Pin Current: Typically 2 mA at 3-A load

• Ensured Accuracy of ±3.5% at 25°C (STD) current.

• Overtemperature and Overcurrent Protection • Disable Mode: Typically 25-nA quiescent current

• ENABLE (EN) Pin (LP38501 only) when the EN pin is pulled low.

• –40°C to +125°C Operating Temperature Range • Simplified Compensation: Stable with any type of

output capacitor, regardless of ESR.

2 Applications • Precision Output: A grade versions available with

1.5% VADJ tolerance (25°C) and 3% over line,

• ASIC Power Supplies In: load, and temperature.

– Printers, Graphics Cards, DVD Players

Device Information(1)

– Set Top Boxes, Copiers, Routers

PART NUMBER PACKAGE BODY SIZE (NOM) • DSP and FPGA Power Supplies

LP38501 DDPAK/TO-263 (5) 10.16 mm x 8.42 mm • SMPS Regulator

LP38503 TO-263 (5) 10.16 mm x 9.85 mm • Conversion from 3.3-V or 5-V Rail

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