LP2950-xx/LP2951-xx
Feb. 2009
LP2950-xx/LP2951-xx
100mA Low Dropout Voltage Regulators
Product Description
The LP2950-xx and LP2951-xx are micropower voltage regulators with very low quiescent current (75 μA typ.) and very low dropout
voltage (typ. 40 mV at light loads and 380 mV at 100 mA). This includes a tight initial tolerance of 0.5% typ., extremely good load and
line regulation of 0.05% typ., and very low output temperature coefficient, making the LP2950-xx/LP2951-xx useful as a low-power
voltage reference. They are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the
LP2950-xx/LP2951-xx increases only slightly in dropout, prolonging battery life.
One such feature 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 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 –xx volt output (depending on the version), or programmed from 1.24V to 29V with an external pair of
resistors.
The LP2950-xx is available in the popular 3-pin TO-92 package compatible with other fixed regulator. The 8-pin LP2951-xx is available in
plastic packages.
Features
High accuracy output voltage
Guaranteed 100 mA output current
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 F capacitance for stability
Applications
Battery powered systems
Cordless telephones
Radio control systems
Portable/Palm top/Notebook computers
Portable consumer equipment
Portable instrumentation
Avionics
Automotive electronics
SMPS Post-Regulator
Voltage reference
LP2951-xx versions only
Error Flag warns of output dropout
Logic-Controlled electronic shutdown
Output programmable from 1.24 to 29V
Block Diagram and Typical Applications
LP2950 - xx
LP2951 - xx
:
ADD.: RM. 4004,
88
BLOCK B,
B
4004
,
:210008
(TEL.): (86)-25-68853600
(FAX): (86)-25-68853600-810
WEB-SITE: WWW.HN-ELEC.COM
NEW WORLD CENTRE,
NO. 88 ZHUJIANG ROAD,
1
NANJING 210008,
CHINA
HN [ NANJING HONANO ELECTRONIC CO., LTD. ]
