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LP2985-N Datasheet Preview

LP2985-N Datasheet

150-mA Low-noise Low-dropout Regulator

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LP2985-N
SNVS018Y – MARCH 2000 – REVISED DECEMBER 2016
LP2985-N Micropower 150-mA Low-Noise Ultra-Low-Dropout Regulator in a SOT-23
Package Designed for Use With Very Low ESR Output Capacitors
1 Features
1 Input Voltage Range: 2.5 V to 16 V
• Ultra Low-Dropout Voltage
• Ensured 150 mA Output Current
• Requires Minimum External Components
• Stable With Low-ESR Output Capacitor
• < 1 µA Quiescent Current When Shut Down
• Low Ground Pin Current at All Loads
• Output Voltage Accuracy 1% (A Grade)
• High Peak Current Capability
• Low ZOUT: 0.3 Typical (10 Hz to 1 MHz)
• Overtemperature and Overcurrent Protection
40°C to 125°C Junction Temperature Range
• Custom Voltages Available
2 Applications
• Cellular Phones
• Palmtop and Laptop Computers
• Personal Digital Assistants (PDA)
• Camcorders, Personal Stereos, Cameras
3 Description
The LP2985-N low noise linear (LDO) regulator
delivers up to 150-mA output current and only
requires 300-mV dropout voltage of input to output.
Using an optimized vertically integrated PNP (VIP)
process, the LP2985-N delivers unequaled
performance for all battery-powered designs. The
LP2985-N device provides 1% tolerance precision
output voltage with only 75-µA quiescent current at 1-
mA load and 850 µA at 150-mA load. By adding a 10-
nF bypass capacitor, the output noise can be reduced
to 30 µVRMS in a 30-kHz bandwidth.
The LP2985-N is designed to work with a ceramic
output capacitor with equivalent series resistance
(ESR) as low as 5 m. The device is available with
fixed output voltage from 2.5 V to 6.1 V. Contact
Texas Instrument Sales for specific voltage option
needs.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
LP2985-N
SOT-23 (5) 2.90 mm x 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
VIN
CIN
1 µF
IN
OUT
LP2985
GND
VOUT
COUT
2.2 µF
ON/OFF
ON/OFF BYPASS
CBYPASS
0.01 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.




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LP2985-N Datasheet Preview

LP2985-N Datasheet

150-mA Low-noise Low-dropout Regulator

No Preview Available !

LP2985-N
SNVS018Y – MARCH 2000 – REVISED DECEMBER 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......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 7
7 Detailed Description ............................................ 11
7.1 Overview ................................................................. 11
7.2 Functional Block Diagram ....................................... 11
7.3 Feature Description................................................. 11
7.4 Device Functional Modes........................................ 13
8 Application and Implementation ........................ 14
8.1 Application Information............................................ 14
8.2 Typical Application .................................................. 14
9 Power Supply Recommendations...................... 21
10 Layout................................................................... 21
10.1 Layout Guidelines ................................................. 21
10.2 Layout Example .................................................... 21
11 Device and Documentation Support ................. 22
11.1 Documentation Support ........................................ 22
11.2 Receiving Notification of Documentation Updates 22
11.3 Community Resources.......................................... 22
11.4 Trademarks ........................................................... 22
11.5 Electrostatic Discharge Caution ............................ 22
11.6 Glossary ................................................................ 22
12 Mechanical, Packaging, and Orderable
Information ........................................................... 22
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision X (May 2015) to Revision Y
Page
• Added top nav icon for TI Designs ........................................................................................................................................ 1
• Deleted "Smallest Possible Size (SOT-23 Package)" from Features..................................................................................... 1
• Deleted all information re: DSBGA package - it is no longer available ................................................................................. 1
• Deleted DSBGA pin function info from Pin Functions ............................................................................................................ 3
• Deleted infor re: DSBGA package; changed "...value of RθJA for the SOT-23 package is 175.7°C/W ..." to "...value of
RθJA for the SOT-23 package is 169.0°C/W..." in footnote 3 to Abs Max table - see update thermal info for SOT-23
in Thermal Information............................................................................................................................................................ 4
• Changed "All pins except 3 and 4 (SOT-23)" to "Pins 3 and 4 ." .......................................................................................... 4
• Changed thermal values for SOT-23 package; added Note 2 to Thermal Information table ................................................ 5
• Deleted footnote 1 to Electrical Characteristics ..................................................................................................................... 5
• Changed content in last 2 paragraphs of Reverse Input-Output Voltage ........................................................................... 17
• Added Power Dissipation and Estimating Junction Temperature subsections ................................................................... 18
Changes from Revision W (September 2014) to Revision X
Page
• Changed pin names in text and app circuit drawing "VOUT" and "VIN" to "OUT" and "IN"; replace Handling Ratings
with ESD Ratings; update Thermal Values ........................................................................................................................... 1
• Changed footnote 1 to Ab Max table per new format ........................................................................................................... 4
• Changed location of storage temperature range from Handling Ratings to Ab Max table..................................................... 4
• Added required Application Information section .................................................................................................................. 14
Changes from Revision V (April 2013) to Revision W
Page
• Added Pin Configuration and Functions section, Handling Rating 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 .................. 1
2
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Product Folder Links: LP2985-N
Copyright © 2000–2016, Texas Instruments Incorporated


Part Number LP2985-N
Description 150-mA Low-noise Low-dropout Regulator
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