MNLP2956A-X

· Output voltage adjusts from 1.23V to 29V.
· Guaranteed 250 mA current (main output).
· Auxiliary LDO (75 mA) adjustable output.
· Auxiliary comparator with open-collector output.
· Shutdown pin for main output.
· Extremely low quiescent current.
· Low dropout voltage.
· Extremely tight line and load regulation.
· Very low temperature coefficient.
· Current and thermal limiting.
· Reverse battery protection.

· High-efficiency linear regulator.
·Low dropout battery-powered regulator.
·uP system regulator with switchable high-current Vcc.

Storage Temperature Range ........ .-65 C to +150 C
Operating Junction Temperature Range....-55 C to +125 C
Lead Temperature
(Soldering, 5 Seconds)............... .. 260 C
Power Dissipation
(Note 2, 3) ................ .Internally Limited
Input Supply Voltage........... ...-20V to +30V
Maximum Junction Temperature........ ... .150 C
Feedback Input Voltage
(Note 4)........ .. ........ ..-0.3V to +5V
Aux. Feedback Input Voltage
(Note 4)................ ... .-0.3V to +5V
Shutdown Input Voltage
(Note 4)........... ....... . -0.3V to +30V
Comparator Input Voltage
(Note 4, 5)...................-0.3V to +30V
Comparator Output Voltage
(Note 4, 5)......... ... ......-0.3V to +30V
Thermal Resistance
ThetaJA
CERDIP (Still Air)................... 72 C/W
(500LF/Min Air flow) .................36 C/W
ThetaJC
(Note 3)
CERDIP........................ 2 C/W
ESD Rating
(Note 6).........................2kV

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. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. See Application Hints for additional information on heat sinking and thermal resistance.

The LP2956 is a micropower voltage regulator with very low quiescent current(170uA typical at light loads) and very low dropout voltage (typically 60mV at 1mA load current and 470mV at 250mA load current on the main output).

The LP2956 retains all the desirable characteristics of the LP2951, but offers increased output current (main output), an auxiliary LDO adjustable regulated output (75mA), and additional features.

The auxiliary output of LP2956 is always on (regardless of main output status), so it can be used to power memory circuits.Quiescent current increases only slightly at dropout, which prolongs battery life.The error flag goes low if the main output voltage drops out of regulation.An open-collector auxiliary comparator is included, whose inverting input is tied to the 1.23V reference.Reverse battery protection is provided.The parts are available in plastic DIP and surface mount packages.