Features: *5V, 3V, and 3.3V versions available
* High accuracy output voltage
* Guaranteed 100mA output current
* Extremely low quiescent current
* Low dropout voltage
* Extremely tight load and line regulation
* Very low temperature coefficient
* Use as Regulator or Reference
* Needs minimum capacitance for stability
* Current and Thermal Limiting
* Stable with low-ESR output capacitors (10mΩ to 6Ω)Pinout
SpecificationsInput Supply Voltage ..................................................................−0.3 to +30V
SHUTDOWN Input Voltage,
Error Comparator Output
Voltage, (Note 9)
FEEDBACK Input Voltage ...........................................................−1.5 to +30V
(Note 9) (Note 10)
Power Dissipation ...............................................................Internally Limited
Junction Temperature (TJ) ...................................................................+150
Ambient Storage Temperature ..............................................−65° to +150
Soldering Dwell Time, Temperature
Wave.................................................................................4 seconds, 260
Infrared...........................................................................10 seconds, 240
Vapor Phase....................................................................75 seconds, 219
ESD Rating
Human Body Model(Note 18) ............................................................2500V
| Iout(mA) |
100 |
| Vin MIN. (V) |
2.4 |
| Vin MAX. (V) |
30 |
| IQ (A) |
150 |
| Acc |
0.5%, 1% |
| Vdrop (mV) |
380 |
| Vout1.2V |
|
| Vout1.5V |
No |
| Vout1.8V |
No |
| Vout2.0V |
No |
| Vout2.5V |
No |
| Vout2.7V |
No |
| Vout2.85V |
No |
| Vout2.8V |
No |
| Vout3.0V |
No |
| Vout3.3V |
Yes |
| Vout3.5V |
No |
| Vout5.0V |
Yes |
| VoutAdj. |
No |
| Output Current |
100 mA |
| Output Min |
3.3, 3, 5 Volt |
| Input Max Voltage |
30 Volt |
| Dropout Voltage |
0.38 Volt |
| Adjustable Output |
No |
| Quiescent Current |
0.075 mA |
| On/Off Pin |
No |
| Error Flag |
No |
| RegType |
LDO |
| Temperature Min |
-40 deg C |
| Temperature Max |
125 deg C |
| Output Max |
3.3, 3, 5 Volt |
| Output Voltage |
3.3, 3, 5 Volt |
| View Using Catalog |
DescriptionThe LP2950 and LP2951 are micropower voltage regulators with very low quiescent current (75µA typ.) and very low dropout voltage (typ. 40mV at light loads and 380mV at 100mA). They are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the LP2950/LP2951 increases only slightly in dropout, prolonging battery life.
The LP2950-5.0 is available in the surface-mount D-Pak package, and in the popular 3-pin TO-92 package for pin-compatibility with older 5V regulators. The 8-lead LP2951 is available in plastic, ceramic dual-in-line, LLP, or metal can packages and offers additional system functions.
One such feature is an error flag output which warns of a low output voltage, often due to falling batteries on the input. It may be used for a power-on reset. A second feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. Also, the part may be pin-strapped for a 5V, 3V, or 3.3V output (depending on the version), or programmed from 1.24V to 29V with an external pair of resistors.
Careful design of the LP2950/LP2951 has minimized all contributions to the error budget. This includes a tight initial tolerance (.5% typ.), extremely good load and line regulation (.05% typ.) and a very low output voltage temperature coefficient, making the part useful as a low-power voltage reference.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LP2950ACZ-3.0 |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LP2950ACZ-3.3 |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LP2950ACZ-5.0 |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LP2950CZ-3.0 |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LP2950CZ-3.3 |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LP2950CZ-5.0 |
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.
LP2950 Data Sheet
