MNLP2951-X

· Error flag warns of output dropout.
· Logic-controlled electronic shutdown.
· Output programmable from 1.24 to 29V.
· SMD : 5962-38705M2A*, MGA**, MPA***, MXA****

Power Dissipation
METAL CAN ..........675mW at +25 C
CERDIP .............1.0W at +25 C
LCC ..............1.25W at +25 C
CERAMIC SOIC......... 1.0W at +25 C
Storage Temperature Range
             ............-65 C to +150 C
Operating Ambient Temperature Range
              ............-55 C to +125 C
Absolute Maximum Junction Temperature
                      ..............+160 C
Input Supply Voltage
                   ............-0.3 to +30V
Feedback Input Voltage
(Note 3, 4)
                   ............-1.5 to +30V
Shutdown Input Voltage
(Note 3)
       ................-0.3 to +30V
Error Comparator Out. Voltage
(Note 3)
       ................-0.3 to +30V
Lead Temperature
(Soldering, 10 seconds)......... 260 C
Thermal Resistance
ThetaJA
METAL CAN (Still Air @ 0.5W).....163 C/W
(500LF/Min Air flow @ 0.5W) ......95 C/W
CERDIP (Still Air @ 0.5W) .......131 C/W
(500LF/Min Air flow @ 0.5W)...... 75 C/W
LCC (Still Air @ 0.5W)........ . 95 C/W
(500LF/Min Air flow @ 0.5W)...... 66 C/W
CERAMIC SOIC (Still Air @ 0.5W) ...215 C/W
(500LF/Min Air flow @ 0.5W)... .. 130 C/W
ThetaJC
METAL CAN............... 51 C/W
CERDIP................. 21 C/W
LCC................... 24 C/W
CERAMIC SOIC............ . 24 C/W
Package Weight
(Typical)............... ....TBD
ESD Rating
                                ............500V

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.

Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by Tjmax (maximum junction temperature), ThetaJA (package junction to ambient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is Pdmax = (Tjmax - TA)/ThetaJA or the number given in the Absolute Maximum Ratings, whichever is lower.

Note 3: May exceed input supply voltage.

Note 4: When used in dual-supply systems where the output terminal uses loads returned to a negative supply, the output voltage should be diode-clamped to ground.

The LP2951 is a micropower voltage regulator with very low dropout voltage (typ. 40 mV at light loads and 380 mV at 100 mA). It is ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the LP2951 increases only slightly in dropout, prolonging battery life.

An attractive feature is an error flag output which warns of a low output voltage, often due to falling battery voltage on the input. LP2951 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 output or programmed from 1.24V to 29V with an external pair of resistors.

Careful design of the LP2951 has minimized all contributions to the error budget. This includes a tight initial tolerance(0.5% typ.), extremely good load and line regulation (0.05% typ.) and a very low output voltage temperature coefficient, making the part useful as a low-power voltage reference.