Features: ·Output voltage adjustable from 5V to 20V
· Dropout voltage typically 0.5V @ IO = 1A
· Output current in excess of 1A
· Trimmed reference voltage
·Reverse battery protection
· Internal short circuit current limit
· Mirror image insertion protection
· P+ Product Enhancement tested
· TTL, CMOS compatible ON/OFF switchSpecifications
| Output Current |
1000 mA |
| Output Min |
5 Volt |
| Input Min Voltage |
-15 Volt |
| Input Max Voltage |
26 Volt |
| Dropout Voltage |
0.5 Volt |
| Adjustable Output |
Yes |
| Quiescent Current |
10 mA |
| On/Off Pin |
Yes |
| Error Flag |
No |
| RegType |
LDO |
| Temperature Min |
-55 deg C |
| Temperature Max |
125 deg C |
| Output Max |
20 Volt |
| Feedback Voltage |
1.275 Volt |
| View Using Catalog |
If Military/Aerospace specified devices are required, pleasecontacttheNationalSemiconductorSalesOffice/ Distributors for availability and specifications.
Input Voltage (Survival Voltage, 100 ms)
LM2941T, LM2941S 60V
LM2941CT, LM2941CS 45V
Internal Power Dissipation (Note 3) Internally Limited
Maximum Junction Temperature 150
Storage Temperature Range-65 TJ +150
Lead Temperature
(Soldering, 10 seconds)
TO-220 (T) Package 260
TO-263 (S) Package260
ESD susceptibility to be determined.
DescriptionThe LM2941 positive voltage regulator features the ability to source 1A of output current with a typical dropout voltage of 0.5V and a maximum of 1V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground pin current when the differential between the input voltage and the output voltage exceeds approximately 3V. The quiescent current with 1A of output current and an input-output differential of 5V is therefore only 30mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN− VOUT 3V).
Designed also for vehicular applications, the LM2941 and all regulated circuitry are protected from reverse battery installations or two-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load. Familiar regulator features such as short circuit and thermal overload protection are also provided.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM2941LD |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM2941LDX |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM2941S |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM2941T |
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.
Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-1378: Application Note 1378 Method For Calculating Output Voltage Tolerances in Adjustable Regulators |
647 Kbytes |
15-Jul-05 |
Download |
AN-1378 (Chinese): Application Note 1378 Method For Calculating Output Voltage Tolerances in Adjustable Regulators
|
383 Kbytes |
|
640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> |
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
LM2941 Data Sheet
