MJLP2951-X

· SMD : 5962-3870501BGA*, BPA**, S2A***, SGA****, SPA*****.

Power Dissipation
    (Note 2)
        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
Lead Temperature
        (Soldering, 10 seconds)...... ... 260 C
Storage Temperature Range
                            ..........-65 C to +150 C
Operating Junction Temp Range
        LP2951.............-55 C to +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
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 msut 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 sees 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 quiescent curent (75 uA typ.) and very low dropout voltage (typ. 40 mV at light loads and 380 mV at 100mA). MJLP2951-X are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the LP2951 increases only slightly in dropout, prolonging battery life. The 8-Lead LP2951 is available in plastic, ceramic dual-in-line, or metal can packages and offers additional system functions.

One such feature of MJLP2951-X 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 of MJLP2951-X 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. MJLP2951-X includes a tight initial tolerance (.5% typ.), extremely good load and line regulation (.05% typ.) and a very low output voltage