LP2950-N Regulators Datasheet

LP2950-N Datasheet, PDF, Equivalent


Part Number

LP2950-N

Description

Adjustable Micropower Voltage Regulators

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download LP2950-N Datasheet


LP2950-N
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
LP2950-N, LP2951-N
SNVS764Q – JANUARY 2000 – REVISED DECEMBER 2017
LP295x-N Series of Adjustable Micropower Voltage Regulators
1 Features
1 Input Voltage Range: 2.3 V to 30 V
• 5-V, 3-V, and 3.3-V Output Voltage 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 m
to 6 )
• LP2951-N Versions Only:
– Error Flag Warns of Output Dropout
– Logic-Controlled Electronic Shutdown
– Output Programmable From 1.24 V to 29 V
2 Applications
• High-Efficiency Linear Regulator
• Regulator with Undervoltage Shutdown
• Low Dropout Battery-powered Regulator
• Snap-ON/Snap-OFF Regulator
space
space
space
space
space
space
space
space
space
LP2951 Simplified Schematic
VOUT
LP2951
OUT
IN
VIN
COUT
2.2 µF
SENSE
FEEDBACK
CIN
1 µF
SHUTDOWN
SHUTDOWN
VTAP
GND
ERROR
VFEEDBACK
R1
330 k VOUT
3 Description
The LP2950-N and LP2951-N are micropower
voltage regulators with very low quiescent current
(75 µA typical) and very low dropout voltage (typical
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 device
increases only slightly in dropout, prolonging battery
life.
Careful design of the LP2950-N/LP2951-N has
minimized all contributions to the error budget. This
includes a tight initial tolerance (0.5% typical),
extremely good load and line regulation (0.05%
typical) and a very low output voltage temperature
coefficient, making the part useful as a low-power
voltage reference.
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 5-V, 3-V,
or 3.3-V output (depending on the version), or
programmed from 1.24 V to 29 V with an external
pair of resistors.
The LP2950-N is available in the surface-mount TO-
252 package and in the popular 3-pin TO-92 package
for pin-compatibility with older 5-V regulators. The 8-
pin LP2951-N is available in plastic, ceramic dual-in-
line, WSON, or metal can packages and offers
additional system functions.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
LP2950-N
TO-92 (3)
TO-252 (3)
4.30 mm × 4.30 mm
9.91 mm × 6.58 mm
SOIC (8)
4.90 mm × 3.91 mm
LP2951-N
VSSOP (8)
WSON (8)
3.00 mm × 3.00 mm
4.00 mm × 4.00 mm
PDIP (8)
9.81 mm × 6.35 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
LP2950-N Simplified Schematic
LP2950
VIN IN
CIN
1 µF
OUT
GND
VOUT
COUT
2.2 µF
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

LP2950-N
LP2950-N, LP2951-N
SNVS764Q – JANUARY 2000 – REVISED DECEMBER 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Voltage Options ..................................................... 3
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5
7.2 ESD Ratings.............................................................. 5
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information: LP2950-N................................ 6
7.5 Thermal Information: LP2951-N................................ 6
7.6 Electrical Characteristics........................................... 7
7.7 Typical Characteristics ............................................ 10
8 Detailed Description ............................................ 16
8.1 Overview ................................................................. 16
8.2 Functional Block Diagrams ..................................... 16
8.3 Feature Description................................................. 17
8.4 Device Functional Modes........................................ 18
9 Application and Implementation ........................ 19
9.1 Application Information............................................ 19
9.2 Typical Applications ................................................ 20
10 Power Supply Recommendations ..................... 32
11 Layout................................................................... 32
11.1 Layout Guidelines ................................................. 32
11.2 Layout Example .................................................... 32
11.3 WSON Mounting ................................................... 33
12 Device and Documentation Support ................. 34
12.1 Documentation Support ....................................... 34
12.2 Related Links ........................................................ 34
12.3 Community Resources.......................................... 34
12.4 Trademarks ........................................................... 34
12.5 Electrostatic Discharge Caution ............................ 34
12.6 Glossary ................................................................ 34
13 Mechanical, Packaging, and Orderable
Information ........................................................... 34
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision P (May 2016) to Revision Q
Page
• Changed LP2951-N ESD parameter pin references and added SENSE pin row to LP2951-N ESD parameter in ESD
Ratings table........................................................................................................................................................................... 5
Changes from Revision O (December 2014) to Revision P
Page
• Added rows to ESD Ratings table to differentiate values for pins 3 and 7 of the LP2951-N device...................................... 5
• Added footnotes 2 and 3 to both Thermal Information tables ............................................................................................... 6
Changes from Revision N (May 2013) to Revision O
Page
• Added Device Information and ESD Rating tables, Feature Description, Device Functional Modes, Application and
Implementation, Power Supply Recommendations, Layout, Device and Documentation Support, and Mechanical,
Packaging, and Orderable Information sections; moved some curves to Application Curves section; update pin
names; change package nomenclature from National to TI .................................................................................................. 1
Changes from Revision M (April 2013) to Revision N
Page
• Changed layout of National Data Sheet to TI format ............................................................................................................ 1
2 Submit Documentation Feedback
Copyright © 2000–2017, Texas Instruments Incorporated
Product Folder Links: LP2950-N LP2951-N


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity LP2950-N, LP2951-N SNVS764Q – JANUARY 2000 – REVISED DECEMBER 2017 LP295x-N Series of Adjustable Micropow er Voltage Regulators 1 Features •1 Input Voltage Range: 2.3 V to 30 V • 5-V, 3-V, and 3.3-V Output Voltage Vers ions Available • High Accuracy Output Voltage • Ensured 100-mA Output Curr ent • Extremely Low Quiescent Current • Low Dropout Voltage • Extremely Tight Load and Line Regulation • Very Low Temperature Coefficient • Use as Regulator or Reference • Needs Minim um Capacitance for Stability • Curren t and Thermal Limiting • Stable With Low-ESR Output Capacitors (10 mΩ to 6 Ω) • LP2951-N Versions Only: – E rror Flag Warns of Output Dropout – L ogic-Controlled Electronic Shutdown – Output Programmable From 1.24 V to 29 V 2 Applications • High-Efficiency L inear Regulator • Regulator with Unde rvoltage Shutdown • Low Dropout Battery-powered Regulator • Snap-ON/Snap-OFF Regulator space space space sp.
Keywords LP2950-N, datasheet, pdf, etcTI, Adjustable, Micropower, Voltage, Regulators, P2950-N, 2950-N, 950-N, LP2950-, LP2950, LP295, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)