LP2951 Datasheet, PDF (1/3 Pages) Semtech Corporation – 150mA ADJUSTABLE VOLTAGE REGULATOR

LP2950/LP2951 100mA Low Drop Out Voltage Regulators
FEATURES
• High accuracy output voltage
• Guaranteed 100mA output
• Very low quiescent current
• Low dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Needs only 1µF for stability
• Error Flag warns of output dropout
• Logic-Controlled electronic shutdown
• Output programmable from 1.24 to 29V
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
PRODUCT DESCRIPTION
The LP2950-XX/LP2951-XX is a low power voltage regulator. This device excellent choice for use in battery powered application such as c
ordless telephone, radio control systems, and portable computers.
The LP2950-XX/LP2951-XX features very low quiescent current (75µA Typ.) and very low drop output voltage (Typ.
40mV at light load and 380mV at 100mA). 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.
The error flag output feature is used as power-on reset for warn of a low output voltage, due to following batteries on input. Other feature i
s the logic-compatible shutdown input which enable the regulator to be switched on and off.
The LP2951-XX is available in 8-pin plastic packages. The regulator output voltage may be pin-strapped for a -XX volt or programmed from
1.24 volt to 29 volts with external pair of resistors.
The LP2950-XX is offered in 3-pin TO-92 package compatible with other fixed regulator.
Absolute Maximum Ratings
Power Dissipation
Lead Temperature
(Soldering, 5 seconds)
Storage Temperature Range
Operating Junction Temperature Range
Input Supply Voltage
Feedback Input Voltage
Shutdown Input Voltage
Error Comparator Output
Internally Limited
260°C
-65°C to+150°C
-55°C to +150°C
-0.3 to +30V
-1.5 to +30V
-0.3 to +30V
-0.3 to +30V
Device Selection Guide
Vout, V
olts
Device
2.85*
3.0
3.3
5.0
LP2950-2.85, LP2951-2.85
LP2950-3.0, LP2951-3.0
LP2950-3.3, LP2951-3.3
LP2950-5.0, LP2951-5.0
* - other versions are also available
Vout = 2.0V to 5.0V. Please consult factory for
more information
Pin Connection
LP2951-XX
Top View
TO-92 Plastic Package
(LP2950-XX only)
Bottom View
Figure 1. Adjustable Regulator