Microchip | LP2951-03YM

The LP2951-03YM is a micropower voltage regulators with very low dropout voltage (typically 40 mV at light loads and 380 mV at 100 mA), and very low quiescent current (75 µA typical).

The quiescent current of the LP2951-03YM increases only slightly in dropout, thus prolonging battery life. This feature, among others, makes the LP2950 and LP2951 ideally suited for use in battery-powered systems. Available in a 3-Pin TO-92 package, the LP2950 is pin-compatible with the older 5 V regulators. Additional system functions, such as programmable output voltage and logic- controlled shutdown, are available in the 8-pin DIP and 8-pin SOIC versions of the LP2951.

Additional features available with the LP2951 also include an error flag output that warns of a low output voltage, which is often due to failing batteries on the input. This may also be used as a power-on reset. A logic-compatible shutdown input is also available which enables the regulator to be switched on and off. This part may also be pin-strapped for a 5V output, or programmed from 1.24 V to 29 V with the use of two external resistors. The LP2951 is available as an -02 or -03 version.

The LP2951-03YM have a tight initial tolerance (0.5% typical), a very low output voltage temperature coefficient which allows use as a low-power voltage reference, and extremely good load and line regulation (0.05% typical). This greatly reduces the error in the overall circuit, and is the result of careful design techniques and process control.

Key Features :

• High accuracy 5 V, guaranteed 100 mA output
• Extremely low quiescent current
• Low-dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Use as regulator or reference
• Needs only 1 µF for stability
• Current and thermal limiting
• LP2951 Versions Only
• Error flag warns of output dropout
• Logic-controlled electronic shutdown
• Output programmable from 1.24 to 29 V

Applications :

• Automotive Electronics
• Voltage Reference
• Avionics