LP2954A - 5V Micropower Low-Dropout Voltage Regulator
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
5V output within 1.2% over temperature (A grade)
Adjustable 1.23 to 29V output voltage available (LP2954IM and LP2954AIM)
Guaranteed 250 mA output current
Extremely low quiescent current
Low dropout voltage
Reverse battery protection
Extremely tight line and load regulation
Very low temperature coefficient
Current and thermal limiting
Pin compatible with LM2940 and LM340 (5V version only)
Adjustable version adds error flag to warn of output drop and a logic-controlled shutdown

General Description


The LP2954 is a 5V micropower voltage regulator with very low quiescent current (90 µA typical at 1 mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250 mA load current).

The quiescent current increases only slightly at dropout (120 µA typical), which prolongs battery life.

The LP2954 with a fixed 5V output is available in the three-lead TO-220 and TO-263 packages. More...


Applications


High-efficiency linear regulator
Low dropout battery-powered regulator
  Typical Application
click for larger image


ParametersValues
Output Current 250 mA
Output Min 1.23 Volt
Input Min Voltage -20 Volt
Input Max Voltage 30 Volt
Dropout Voltage 0.8 Volt
Adjustable Output Yes
Quiescent Current 0.21 mA
On/Off Pin Yes
Error Flag Yes
RegType LDO
Temperature Min -40 deg C
Temperature Max 125 deg C
Output Max 29 Volt


Typical Performance


click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LP2954/LP2954A 5V and Adjustable Micropower Low-Dropout Voltage Regulators 802
Kbytes
2-May-05 Download
LP2954/LP2954A 5V and Adjustable Micropower Low-Dropout Voltage Regulators (Japanese)
546 Kbytes   Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.


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
LP2954AIMSOIC NARROW8NOPB
STD
1
1
260
235
RoHS N/A Full productionN/A
Samples
Buy Now
1K+$1.28rail
of
95
NSZXTT
LP295
4AIM
8 weeks500
LP2954AIMXSOIC NARROW8NOPB
STD
1
1
260
235
RoHS N/A Full productionN/A
 
Buy Now
1K+$1.28reel
of
2500
NSZXTT
LP295
4AIM
8 weeks5000
LP2954AITTO-2203NOPB1NARoHS N/A Full productionN/A
Samples
Buy Now
1K+$2.15rail
of
45
NSUZXYTTE#
LP2954AIT
8 weeks1000
LP2954AISTO-2633NOPB
STD
3
3
245
235
RoHS N/A Full productionN/A
Samples
Buy Now
1K+$2.15rail
of
45
NSUZXYTTE#
LP2954AIS
8 weeks500
LP2954AISXTO-2633NOPB
STD
3
3
245
235
RoHS N/A Full productionN/A
 
Buy Now
1K+$2.15reel
of
500
NSUZXYTTE#
LP2954AIS
8 weeks2000

General Description


The LP2954 is a 5V micropower voltage regulator with very low quiescent current (90 µA typical at 1 mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250 mA load current).

The quiescent current increases only slightly at dropout (120 µA typical), which prolongs battery life.

The LP2954 with a fixed 5V output is available in the three-lead TO-220 and TO-263 packages. The adjustable LP2954 is provided in an 8-lead surface mount, small outline package. The adjustable version also provides a resistor network which can be pin strapped to set the output to 5V.

Reverse battery protection is provided.

The tight line and load regulation (0.04% typical), as well as very low output temperature coefficient make the LP2954 well suited for use as a low-power voltage reference.

Output accuracy is guaranteed at both room temperature and over the entire operating temperature range.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP2954AIMSLM04404600353250011002356520
LP2954AIMXSLM04404600353250011002356520
LP2954AISSLM04404600353250011002356520
LP2954AISXSLM04404600353250011002356520
LP2954AITSLM04404600353250011002356520

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]