LP2950-N Datasheet, PDF (1/43 Pages) Texas Instruments – 5V, 3V, and 3.3V Versions Available, High Accuracy Output Voltage

LP2950-N, LP2951-N
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SNVS764N – JANUARY 2000 – REVISED MAY 2013
LP2950-N/LP2951-N Series of Adjustable Micropower Voltage Regulators
Check for Samples: LP2950-N, LP2951-N
FEATURES
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•2 5V, 3V, and 3.3V Versions Available
• High Accuracy Output Voltage
• Ensured 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 Minimum Capacitance for Stability
• Current and Thermal Limiting
• Stable With Low-ESR Output Capacitors (10
mΩ to 6Ω)
LP2951-N VERSIONS ONLY
• Error Flag Warns of Output Dropout
• Logic-Controlled Electronic Shutdown
• Output Programmable From 1.24 to 29V
DESCRIPTION
The LP2950-N and LP2951-N 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). They are ideally
suited for use in battery-powered systems.
Furthermore, the quiescent current of the LP2950-
N/LP2951-N increases only slightly in dropout,
prolonging battery life.
The LP2950-N-5.0 is available in the surface-mount
PFM package, and in the popular 3-pin TO-92
package for pin-compatibility with older 5V regulators.
The 8-lead LP2951-N is available in plastic, ceramic
dual-in-line, WSON, or metal can packages and
offers additional system functions.
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 5V, 3V,
or 3.3V output (depending on the version), or
programmed from 1.24V to 29V with an external pair
of resistors.
Careful design of the LP2950-N/LP2951-N has
minimized all contributions to the error budget. This
includes a tight initial tolerance (.5% typ.), extremely
good load and line regulation (.05% typ.) and a very
low output voltage temperature coefficient, making
the part useful as a low-power voltage reference.
Block Diagram and Typical Applications
Figure 1. LP2950-N
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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