LP38501-ADJ - 3A FlexCap Low Dropout Linear Regulator for 2.7V to 5.5V Inputs

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Reliability	Knowledge Base

Features

•	FlexCap: Stable with ceramic, tantalum, or aluminum capacitors
•	Stable with 10 µF input/output capacitor
•	Adjustable output voltage from 0.6V to 5V
•	Low ground pin current
•	25 nA quiescent current in shutdown mode
•	Guaranteed output current of 3A
•	Available in TO-263, TO-263 THIN packages
•	Guaranteed V_ADJ accuracy of ±1.5% @ 25°C (A Grade)
•	Guaranteed V_ADJ accuracy of ±3.5% @ 25°C (STD)
•	Over-Temperature and Over-Current protection
•	−40°C to +125°C operating T_J range
•	Enable pin (LP38501)

General Description

National's FlexCap LDO's feature unique compensation that allows the use of any type of output capacitor with no limits on minimum or maximum ESR. More...

Applications

•	ASIC Power Supplies In:
•	Printers, Graphics Cards, DVD Players
•	Set Top Boxes, Copiers, Routers
•	DSP and FPGA Power Supplies
•	SMPS Regulator
•	Conversion from 3.3V or 5V Rail

Typical Application

*click for larger image

Parameters Values

Output Current 3000 mA

Output Min 0.6 Volt

Input Min Voltage 2.7 Volt

Input Max Voltage 5.5 Volt

Dropout Voltage 0.42 Volt

Adjustable Output Yes

Quiescent Current 2 mA

PSRR 58 dB

Voltage Noise (rms) 100 uV

Ceramic Capacitors Stable Yes

Feedback Tolerance 3.5 %

On/Off Pin Yes

Error Flag No

RegType LDO

Temperature Min -40 deg C

Temperature Max 125 deg C

Special Features FlexCap LDO

Output Max 5 Volt

Feedback Voltage 0.6 Volt

Typical Performance

*click for larger image

Also Recommended

LP38503-ADJ▲

3A FlexCap LDO Without Enable

Block Diagram

*click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LP38501/3-ADJ, LP38501A/3A-ADJ 3A FlexCap Low Dropout Linear Regulator for 2.7V to 5.5V Inputs	383 Kbytes	30-Oct-09	Download
LP38501/3-ADJ, LP38501A/3A-ADJ 3A FlexCap Low Dropout Linear Regulator for 2.7V to 5.5V Inputs (Japanese)	409 Kbytes

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

LP38501TJ-ADJEV

Evaluation Board for the LP38501

Full production

N/A

$40.00

8 weeks

N/A

LP38501TS-ADJEV

3A FlexCap Low Dropout Linear Regulator for 2.7V to 5.5V Inputs

Full production

N/A

$37.50

8 weeks

N/A

LP38501ATJ-EV

Evaluation Board for the LP38501

Full production

N/A

$40.00

8 weeks

N/A

LP38501ATJ-ADJ

TO-263 THIN

NOPB

260

RoHS

N/A

Full production

N/A

1K+

$0.95

reel
of
1000

NSUZXYTTE#
LP38501A
TJ-ADJ

6 weeks

N/A

LP38501TJ-ADJ

TO-263 THIN

NOPB

260

RoHS

N/A

Full production

N/A

1K+

$0.95

reel
of
1000

NSUZXYTTE#
LP38501
TJ-ADJ

8 weeks

N/A

LP38501TS-ADJ

TO-263

NOPB

245

RoHS

N/A

Full production

N/A

1K+

$0.95

rail
of
45

NSUZXYTTE#
LP38501
TS-ADJ

6 weeks

N/A

LP38501TSX-ADJ

TO-263

NOPB

245

RoHS

N/A

Full production

N/A

1K+

$0.95

reel
of
500

NSUZXYTTE#
LP38501
TS-ADJ

6 weeks

N/A

General Description

National's FlexCap LDO's feature unique compensation that allows the use of any type of output capacitor with no limits on minimum or maximum ESR. The LP38501/3 series of low-dropout linear regulators operates from a +2.7V to +5.5V input supply. These ultra low dropout linear regulators respond very quickly to step changes in load, which makes them suitable for low voltage microprocessor applications. Developed on a CMOS process, (utilizing a PMOS pass transistor), the LP38501/3 has low quiescent current that changes little with load current.

Ground Pin Current: Typically 2 mA at 3A load current.

Disable Mode: Typically 25 nA quiescent current when the Enable 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.

Reliability Metrics

Part Number	Process	EFR Sample Size	LTA Device Hours	FITS	MTTF (Hours)
LP38501ATJ-ADJ	CMOS7	18406	1089000	4	309006723
LP38501TJ-ADJ	CMOS7	18406	1089000	4	309006723
LP38501TS-ADJ	CMOS7	18406	1089000	4	309006723
LP38501TSX-ADJ	CMOS7	18406	1089000	4	309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

Application Notes

Title	Size in Kbytes	Date
AN-1732: Application Note 1732 LP38501TS-ADJ Evaluation Board	146 Kbytes	22-May-08	Download
AN-1824: Application Note 1824 FlexCap Technology Simplifies LDO Design	196 Kbytes	23-Sep-08	Download
AN-1781: Application Note 1781 LP38501TJ-ADJ Evaluation Board	146 Kbytes	29-Jan-08	Download
AN-1830: Application Note 1830 LP38501ATJ-ADJ Evaluation Board	146 Kbytes	4-Apr-08	Download

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[Information as of 7-Nov-2009]