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LP2981-50 Datasheet Preview

LP2981-50 Datasheet

100-mA Ultra-Low Dropout Regulators

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LP2981-28, LP2981-29, LP2981-30
LP2981-33, LP2981-50, LP2981A-28
LP2981A-29, LP2981A-30, LP2981A-33, LP2981A-50
SLVS521G – JULY 2004 – REVISED AUGUST 2016
LP2981 100-mA Ultra-Low Dropout Regulators With Shutdown
1 Features
1 Output Tolerance of
– 0.75% (A Grade)
– 1.25% (Standard Grade)
• Ultra-Low Dropout Typically:
– 200 mV at Full Load of 100 mA
– 7 mV at 1 mA
• Low IQ: 600 µA Typical at Full Load of 100 mA
• Shutdown Current: 0.01 µA Typical
• Fast Transient Response to Line and Load
• Overcurrent and Thermal Protection
• High Peak Current Capability
• Low ZOUT Over Wide Frequency Range
40°C to 125°C Temperature Range
2 Applications
• Smart Meters
• Servo and Motor Control
• Mobile Phones and Cameras
• Audio and Portable Speakers
• Telecommunication and Networking
3 Description
The LP2981 and LP2981A families of fixed-output,
low-dropout regulators offer exceptional, cost-
effective performance for both portable and non-
portable applications. Available in fixed voltages of
2.8 V, 3 V, 3.3 V, and 5 V, the family has an output
tolerance of 0.75% for the A-grade devices (1.25%
for the standard grade) and is capable of delivering
100-mA continuous load current. Standard regulator
features, such as overcurrent and overtemperature
protection, are included.
The LP2981 and LP2981A have features that make
the regulators ideal candidates for a variety of
portable applications:
• Low dropout: A PNP pass element allows a typical
dropout of 200 mV at 100-mA load current and 7
mV at 1-mA load.
• Low quiescent current: The use of a vertical PNP
process allows for quiescent currents that are
considerably lower than those associated with
traditional lateral PNP regulators.
• Shutdown: A shutdown feature is available,
allowing the regulator to consume only 0.01 µA
when the ON/OFF pin is pulled low.
Device Information(1)
PART NUMBER PACKAGE (PINS) BODY SIZE (NOM)
LP2981-XXDBV
LP2981A-XXDBV
SOT-23 (5)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Block Diagram
V IN
ON/OFF
VREF
1.23 V
í
+
R2
R1
Overcurrent/
Overtemperature
Protection
VOUT
GND
Copyright © 2016, Texas Instruments Incorporated
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.




etcTI

LP2981-50 Datasheet Preview

LP2981-50 Datasheet

100-mA Ultra-Low Dropout Regulators

No Preview Available !

LP2981-28, LP2981-29, LP2981-30
LP2981-33, LP2981-50, LP2981A-28
LP2981A-29, LP2981A-30, LP2981A-33, LP2981A-50
SLVS521G – JULY 2004 – REVISED AUGUST 2016
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......................................................... 3
6.1 Absolute Maximum Ratings ...................................... 3
6.2 ESD Ratings.............................................................. 3
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics: LP2981-xx ...................... 4
6.6 Electrical Characteristics: LP2981A-xx ..................... 5
6.7 Typical Characteristics .............................................. 6
7 Detailed Description .............................................. 7
7.1 Overview ................................................................... 7
7.2 Functional Block Diagram ......................................... 7
7.3 Feature Description................................................... 7
7.4 Device Functional Modes.......................................... 9
8 Application and Implementation ........................ 10
8.1 Application Information............................................ 10
8.2 Typical Application ................................................. 10
9 Power Supply Recommendations...................... 12
10 Layout................................................................... 12
10.1 Layout Guidelines ................................................. 12
10.2 Layout Example .................................................... 12
11 Device and Documentation Support ................. 13
11.1 Related Links ........................................................ 13
11.2 Receiving Notification of Documentation Updates 13
11.3 Community Resources.......................................... 13
11.4 Trademarks ........................................................... 13
11.5 Electrostatic Discharge Caution ............................ 13
11.6 Glossary ................................................................ 13
12 Mechanical, Packaging, and Orderable
Information ........................................................... 14
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision F (August 2008) to Revision G
Page
• Added Device Information table, ESD 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
• Changed thermal table to align with JEDEC standards ......................................................................................................... 4
2
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Copyright © 2004–2016, Texas Instruments Incorporated
Product Folder Links: LP2981-28 LP2981-29 LP2981-30 LP2981-33 LP2981-50 LP2981A-28 LP2981A-29 LP2981A-
30 LP2981A-33 LP2981A-50


Part Number LP2981-50
Description 100-mA Ultra-Low Dropout Regulators
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