Features: · Very low quiescent current
·Output current in excess of 100 mA
· Input-output differential less than 0.6V
· Reverse battery protection
· 60V load dump protection
· −50V reverse transient protection
· Short circuit protection
· Internal thermal overload protection
· Mirror-image insertion protection
· Available in TO-220, TO-92, TO-263, SO-8 or 6-Bump micro SMD packages
· Available as adjustable with TTL compatible switch
· See AN-1112 for micro SMD considerationsPinout
SpecificationsIf Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Input Voltage
Operating Range..................................................................26V
Overvoltage Protection
LM2931A, LM2931C (Adjustable)......................................... 60V
LM2931................................................................................ 50V
Internal Power Dissipation
(Note 2) (Note 4) Internally Limited
Operating Ambient Temperature
Range .................................................................−40 to +85
Maximum Junction Temperature......................................... 125
Storage Temperature Range .............................−65 to +150
Lead Temp. (Soldering, 10 seconds).................................. 230
ESD Tolerance (Note 5)..................................................... 2000V
| Output Current |
100 mA |
| Output Min |
3, 5 Volt |
| Input Max Voltage |
26 Volt |
| Dropout Voltage |
0.3 Volt |
| Adjustable Output |
No |
| Quiescent Current |
0.4 mA |
| On/Off Pin |
Yes, No |
| Error Flag |
No |
| RegType |
LDO |
| Temperature Min |
-40 deg C |
| Temperature Max |
85 deg C |
| Output Max |
24, 5 Volt |
| Output Voltage |
5 Volt |
| View Using Catalog |
DescriptionThe LM2931 positive voltage regulator features a very low quiescent current of 1mA or less when supplying 10mA loads. This unique characteristic and the extremely low input-output differential required for proper regulation (0.2V for output currents of 10mA) make the LM2931 the ideal regulator for standby power systems. Applications include memory standby circuits, CMOS and other low power processor power supplies as well as systems demanding as much as 100mA of output current.
Designed originally for automotive applications, the LM2931 and all regulated circuitry are protected from reverse battery installations or 2 battery jumps. During line transients, such as a load dump (60V) when the input voltage to the regulator can momentarily exceed the specified maximum operatingvoltage, the regulator will automatically shut down to protect both internal circuits and the load. The LM2931 cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided.
The LM2931 family includes a fixed 5V output (±3.8% tolerance for A grade) or an adjustable output with ON/OFF pin.Both versions are available in a TO-220 power package, TO-263 surface mount package, and an 8-lead surface mount package. The fixed output version is also available in the TO-92 plastic and 6-Bump micro SMD packages.
The LM2931 positive voltage regulator features a very low quiescent current of 1mA or less when supplying 10mA loads. This unique characteristic and the extremely low input-output differential required for proper regulation (0.2V for output currents of 10mA) make the LM2931 the ideal regulator for standby power systems. Applications include memory standby circuits, CMOS and other low power processor power supplies as well as systems demanding as much as 100mA of output current.
Designed originally for automotive applications, the LM2931 and all regulated circuitry are protected from reverse battery installations or 2 battery jumps. During line transients, such as a load dump (60V) when the input voltage to the regulator can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both internal circuits and the load. The LM2931 cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided.
The LM2931 family includes a fixed 5V output (±3.8% tolerance for A grade) or an adjustable output with ON/OFF pin. Both versions are available in a TO-220 power package, TO-263 surface mount package, and an 8-lead surface mount package. The fixed output version is also available in the TO-92 plastic and 6-Bump micro SMD packages.
More Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-1836: Application Note 1836 LMH1251 Evaluation Board Users Guide v2.0 |
2267 Kbytes |
24-Jun-08 |
Download |
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
LM2931 Data Sheet
