LP2950 Regulators Datasheet

LP2950 Datasheet, PDF, Equivalent


Part Number

LP2950

Description

Adjustable Micropower Voltage Regulators

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download LP2950 Datasheet


LP2950
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LP2950, LP2951
SLVS582I – APRIL 2006 – REVISED NOVEMBER 2014
LP295x Adjustable Micropower Voltage Regulators with Shutdown
1 Features
1 Wide Input Range: Up to 30 V
• Rated Output Current of 100 mA
• Low Dropout: 380 mV (Typ) at 100 mA
• Low Quiescent Current: 75 μA (Typ)
• Tight Line Regulation: 0.03% (Typ)
• Tight Load Regulation: 0.04% (Typ)
• High VO Accuracy
– 1.4% at 25°C
– 2% Over Temperature
• Can Be Used as a Regulator or Reference
• Stable With Low ESR (>12 m) Capacitors
• Current- and Thermal-Limiting Features
• LP2950 Only (3-Pin Package)
– Fixed-Output Voltages of 5 V, 3.3 V, and 3 V
• LP2951 Only (8-Pin Package)
– Fixed- or Adjustable-Output Voltages:
5 V/ADJ, 3.3 V/ADJ, and 3 V/ADJ
– Low-Voltage Error Signal on Falling Output
– Shutdown Capability
– Remote Sense Capability for Optimal Output
Regulation and Accuracy
2 Applications
• Applications with High-Voltage Input
• Power Supplies
3 Description
The LP2950 and LP2951 devices are bipolar, low-
dropout voltage regulators that can accommodate a
wide input supply-voltage range of up to 30 V. The
easy-to-use, 3-pin LP2950 is available in fixed-output
voltages of 5 V, 3.3 V, and 3 V. However, the 8-pin
LP2951 is able to output either a fixed or adjustable
output from the same device. By tying the OUTPUT
and SENSE pins together, and the FEEDBACK and
VTAP pins together, the LP2951 outputs a fixed 5 V,
3.3 V, or 3 V (depending on the version).
Alternatively, by leaving the SENSE and VTAP pins
open and connecting FEEDBACK to an external
resistor divider, the output can be set to any value
between 1.235 V to 30 V.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP2950
TO-92 (3)
4.83 mm x 4.83 mm
LP2951
SOIC (8)
SON (8)
4.90 mm x 3.90 mm
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Dropout Voltage vs Temperature
500
450
400
350
RIL = 100 m A
300
250
200
150
100
RIL = 100 µA
50
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TA – Temperature – °C
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
LP2950, LP2951
SLVS582I – APRIL 2006 – REVISED NOVEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 Handling Ratings ...................................................... 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 7
7 Detailed Description ............................................ 12
7.1 Overview ................................................................. 12
7.2 LP2950 Functional Block Diagram.......................... 12
7.3 LP2951 Functional Block Diagram.......................... 13
7.4 Feature Description................................................. 14
7.5 Device Functional Modes........................................ 15
8 Application and Implementation ........................ 16
8.1 Application Information............................................ 16
8.2 Typical Application ................................................. 16
9 Power Supply Recommendations...................... 19
10 Layout................................................................... 19
10.1 Layout Guidelines ................................................. 19
10.2 Layout Example .................................................... 19
11 Device and Documentation Support ................. 19
11.1 Trademarks ........................................................... 19
11.2 Electrostatic Discharge Caution ............................ 19
11.3 Glossary ................................................................ 19
12 Mechanical, Packaging, and Orderable
Information ........................................................... 19
4 Revision History
Changes from Revision H (March 2012) to Revision I
Page
• Added Applications, Device Information table, Handling Ratings table, Feature Description section, Device
Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout
section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section. ..... 1
• Removed Ordering Information table. .................................................................................................................................... 1
2 Submit Documentation Feedback
Copyright © 2006–2014, Texas Instruments Incorporated
Product Folder Links: LP2950 LP2951


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LP2950, LP2951 SLVS582I – APRIL 2006 – REVISED NOVEMBER 2014 LP 295x Adjustable Micropower Voltage Regu lators with Shutdown 1 Features •1 W ide Input Range: Up to 30 V • Rated O utput Current of 100 mA • Low Dropout : 380 mV (Typ) at 100 mA • Low Quiesc ent Current: 75 μA (Typ) • Tight Lin e Regulation: 0.03% (Typ) • Tight Loa d Regulation: 0.04% (Typ) • High VO A ccuracy – 1.4% at 25°C – 2% Over T emperature • Can Be Used as a Regulat or or Reference • Stable With Low ESR (>12 mΩ) Capacitors • Current- and Thermal-Limiting Features • LP2950 O nly (3-Pin Package) – Fixed-Output Vo ltages of 5 V, 3.3 V, and 3 V • LP295 1 Only (8-Pin Package) – Fixed- or Ad justable-Output Voltages: 5 V/ADJ, 3.3 V/ADJ, and 3 V/ADJ – Low-Voltage Erro r Signal on Falling Output – Shutdown Capability – Remote Sense Capability for Optimal Output Regulation and Accuracy 2 Applications • Applications with High-Voltage Input • Power Su.
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