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Part: LP2951CMWC
Category:
Description: Series of Adjustable Micropower Voltage Regulators
Company: National Semiconductor Corporation
Datasheet: Download LP2951CMWC datasheet File size : 606 kB
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Datasheet text preview:
LP2950/LP2951 Series of Adjustable Micropower Voltage Regulators
July 2000
LP2950/LP2951 Series of Adjustable Micropower Voltage Regulators
General Description
The LP2950 and LP2951 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/ LP2951 increases only slightly in dropout, prolonging battery life. The LP2950-5.0 is available in the surface-mount D-Pak package, and in the popular 3-pin TO-92 package for pin-compatibility with older 5V regulators. The 8-lead LP2951 is available in plastic, ceramic dual-in-line, 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/LP2951 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.
Features
n n n n n n n n n n n 5V, 3V, and 3.3V versions available 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 minimum capacitance for stability Current and Thermal Limiting Stable with low-ESR output capacitors
LP2951 versions only
n Error flag warns of output dropout n Logic-controlled electronic shutdown n Output programmable from 1.24 to 29V
Block Diagram and Typical Applications
LP2950 LP2951
DS008546-25
DS008546-1
© 2000 National Semiconductor Corporation
DS008546
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LP2950/LP2951
Connection Diagrams
TO-92 Plastic Package (Z) Dual-In-Line Packages (N, J) Surface-Mount Package (M, MM)
DS008546-2
Bottom View
DS008546-26
Top View Metal Can Package (H)
10-Lead Ceramic Surface-Mount Package (WG)
DS008546-64
Top View
DS008546-19
Top View TO-252 (D-Pak)
DS008546-70
Front View
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LP2950/LP2951
Ordering Information
Package 3.0V TO-92 (Z) TO-252 (D-Pak) N (N-08E) M (M08A) MM (MUA08A) in Tape and Reel J (J08A) LP2950ACZ-3.0 LP2950CZ-3.0 LP2950CDT-3.0 LP2951ACN-3.0 LP2951CN-3.0 LP2951ACM-3.0 LP2951CM-3.0 LP2951ACMM-3.0 LP2951CMM-3.0 Output Voltage 3.3V LP2950ACZ-3.3 LP2950CZ-3.3 LP2950CDT-3.3 LP2951ACN-3.3 LP2951CN-3.3 LP2951ACM-3.3 LP2951CM-3.3 LP2951ACMM-3.3 LP2951CMM-3.3 5.0V LP2950ACZ-5.0 LP2950CZ-5.0 LP2950CDT-5.0 LP2951ACN LP2951CN LP2951ACM LP2951CM LP2951ACMM LP2951CMM LP2951ACJ LP2951CJ LP2951J LP2951J/883 5926-3870501MPA H (H08C) WG (WG10A) LP2951H/883 5962-3870501MGA LP2951WG/883 5962-3870501MXA -55 < TJ < 150 -55 < TJ < 150 -55 < TJ < 150 -40 < TJ < 125 -40 < TJ < 125 -40 < TJ < 125 -40 < TJ < 125 -40 < TJ < 125 Temperature (°C) -40 < TJ < 125
Package Marking for MM Package:
Order Number LP2951ACMM LP2951CMM LP2951ACMM-3.3 LP2951CMM-3.3 LP2951ACMM-3.0 LP2951CMM-3.0 Package Marking L0DA L0DB L0CA L0CB L0BA L0BB
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