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 versiononly)
Adjustable version adds error flag to warn of output dropand a logic-controlled shutdownApplication High-efficiency linear regulator
Low dropout battery-powered regulatorPinout
Specifications
| 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 |
| View Using Catalog |
DescriptionThe LP2954A 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 LP2954A 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) |
| LP2954AIM |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LP2954AIMX |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LP2954AIS |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LP2954AISX |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LP2954AIT |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
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.
LP2954A Data Sheet
