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, VOUT = 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
click for larger image


ParametersValues
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


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Block Diagram
click for larger image

LP38691-ADJ Internal Block Diagram

Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
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 NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LP38691SD-ADJLLP6NOPB
STD
1
1
260
260
RoHS N/A Full productionN/A
Samples
Buy Now
1K+$0.53reel
of
1000
ZXYTT
L117B
6 weeks5000
LP38691SDX-ADJLLP6NOPB1260RoHS N/A Full productionN/A
 
Buy Now
1K+$0.53reel
of
4500
ZXYTT
L117B
6 weeks5000

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, VOUT = 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. 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-ADJABCD15003417500423400011201409060
LP38691SDX-ADJABCD15003417500423400011201409060

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]