LP38691-ADJ - 500mA Low Dropout CMOS Linear Regulators with Adjustable Output Stable with Ceramic Output Capacitors

LP38691-ADJ - 500mA Low Dropout CMOS Linear Regulators with Adjustable Output Stable with Ceramic Output Capacitors from the PowerWise® Family

Datasheet	Packaging	Samples & Pricing	Reliability	Knowledge Base

Features

•	Output voltage range of 1.25V - 9V
•	2.0% adjust pin voltage accuracy (25°C)
•	Low dropout voltage: 250mV @ 500mA (typ, 5V out)
•	Wide input voltage range (2.7V to 10V)
•	Precision (trimmed) bandgap reference
•	Guaranteed specs for -40°C to +125°C
•	1µA off-state quiescent current
•	Thermal overload protection
•	Foldback current limiting
•	SOT-223 and 6-Lead LLP packages
•	Enable pin (LP38693-ADJ)

General Description

The LP38691/3-ADJ low dropout CMOS linear regulators provide 2.0% precision reference voltage, extremely low dropout voltage (250mV @ 500mA load current, V_OUT = 5V) and excellent AC performance utilizing ultra low ESR ceramic output capacitors.

The low thermal resistance of the LLP and SOT-223 packages allow the full operating current to be used even in high ambient temperature environments.

The use of a PMOS power transistor means that no DC base drive current is required to bias it allowing ground pin current to remain below 100 µA regardless of load current, input voltage, or operating temperature.

Dropout Voltage: 250 mV (typ) @ 500mA (typ. More...

Applications

•	Hard Disk Drives
•	Notebook Computers
•	Battery Powered Devices
•	Portable Instrumentation

Typical Application

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Parameters Values

Output Current 500 mA

Output Min 1.25 Volt

Input Min Voltage 2.7 Volt

Input Max Voltage 10 Volt

Dropout Voltage Undefined Volt

Adjustable Output Yes

Quiescent Current 0.055 mA

On/Off Pin No

Error Flag No

RegType LDO

Temperature Min -40 deg C

Temperature Max 125 deg C

Output Voltage Undefined Volt

Output Max 9 Volt

Automotive Yes

PowerWise Yes

Typical Performance

click for larger image

Also Recommended

LP38501-ADJ▲	New! National's LP38k Family Of High
LP38503-ADJ▲	Performance LDOs Power Digital ICs
LP38853▲	See More At LDO.NATIONAL.COM

Block Diagram

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LP38691-ADJ Internal Block Diagram

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LP38691-ADJ LP38693-ADJ 500mA Low Dropout CMOS Linear Regulators with Adjustable Output Stable with Ceramic Output Capacitors	389 Kbytes	26-Aug-09	Download

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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

LP38691SD-ADJ

LLP

NOPB
STD

1
1

260
260

RoHS

N/A

Full production

N/A

1K+

$0.53

reel
of
1000

ZXYTT
L117B

6 weeks

5000

LP38691SDX-ADJ

LLP

NOPB

260

RoHS

N/A

Full production

N/A

1K+

$0.53

reel
of
4500

ZXYTT
L117B

6 weeks

5000

General Description

The low thermal resistance of the LLP and SOT-223 packages allow the full operating current to be used even in high ambient temperature environments.

Dropout Voltage: 250 mV (typ) @ 500mA (typ. 5V out).

Ground Pin Current: 55 µA (typ) at full load.

Adjust Pin Voltage: 2.0% (25°C) accuracy.

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LP38691SD-ADJ	ABCD150	0	34175	0	0	4234000	1	1201409060
LP38691SDX-ADJ	ABCD150	0	34175	0	0	4234000	1	1201409060

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.

[Information as of 8-Nov-2009]