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LP38500-ADJ Datasheet Preview

LP38500-ADJ Datasheet

1.5-A Flexcap Low-Dropout Linear Regulator

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LP38500-ADJ, LP38502-ADJ
SNVS539H – NOVEMBER 2007 – REVISED SEPTEMBER 2015
LP3850x-ADJ, LP3850xA-ADJ 1.5-A Flexcap Low-Dropout Linear Regulator
for 2.7-V to 5.5-V Inputs
1 Features
1 Input Voltage: 2.7 V to 5.5 V
• Adjustable Output Voltage: 0.6 V to 5 V
• FlexCap: Stable with Ceramic, Tantalum, or
Aluminum Capacitors
• Stable with 10-µF Input and Output Capacitors
• Low Ground-Pin Current
• 25-nA Quiescent Current in Shutdown Mode
• Ensured Output Current of 1.5 A
• Ensured VADJ Accuracy of ±1.5% at 25°C (A
Grade)
• Ensured Accuracy of ±3.5% at 25°C (STD)
• Overtemperature and Overcurrent Protection
• ENABLE Pin (LP38502)
2 Applications
• ASIC Power Supplies In:
– Printers, Graphics Cards, DVD Players
– Set Top Boxes, Copiers, Routers
• DSP and FPGA Power Supplies
• SMPS Regulator
• Conversion from 3.3-V or 5-V Rail
3 Description
TI's FlexCap low-dropout (LDO) linear regulators
feature unique compensation that allow use of any
type of output capacitor with no limits on minimum or
maximum equivalent series resistance (ESR). The
LP38500 and LP38502 series of LDOs operates from
a 2.7-V to 5.5-V input supply. These ultra-low-dropout
linear regulators respond very quickly to step
changes in load, making them suitable for low-voltage
microprocessor applications. Developed on a CMOS
process (utilizing a PMOS pass transistor) the
LP38500-ADJ and LP38502-ADJ have low quiescent
currents that changes little with load current.
• GND Pin Current: Typically 2 mA at 1.5-A load
current.
• Disable Mode: Typically 25-nA quiescent current
when the EN pin is pulled low. (LP38502-ADJ)
• Simplified Compensation: Stable with any type of
output capacitor, regardless of ESR.
• Precision Output: A grade versions available with
1.5% VADJ tolerance (25°C) and 3% over line,
load, and temperature.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP38500
LP38502
DDPAK/TO-263 (5) 10.16 mm x 8.42 mm
TO-263 (5)
10.16 mm x 9.85 mm
WSON (8)
3.00 mm x 2.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Circuit (LP38500)
Typical Circuit (LP38502)
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

LP38500-ADJ Datasheet Preview

LP38500-ADJ Datasheet

1.5-A Flexcap Low-Dropout Linear Regulator

No Preview Available !

LP38500-ADJ, LP38502-ADJ
SNVS539H – NOVEMBER 2007 – REVISED SEPTEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configurations 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 .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagrams ....................................... 9
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 12
8 Application and Implementation ........................ 13
8.1 Application Information............................................ 13
8.2 Typical Applications ............................................... 13
9 Power Supply Recommendations...................... 16
9.1 Power Dissipation/Heatsinking................................ 16
10 Layout................................................................... 17
10.1 Layout Guidelines ................................................. 17
10.2 Layout Examples................................................... 17
11 Device and Documentation Support ................. 20
11.1 Documentation Support ........................................ 20
11.2 Community Resources.......................................... 20
11.3 Trademarks ........................................................... 20
11.4 Electrostatic Discharge Caution ............................ 20
11.5 Glossary ................................................................ 20
12 Mechanical, Packaging, and Orderable
Information ........................................................... 20
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision G (June 2015) to Revision H
Page
• Changed thermal values for KTT (DDPAK/TO-263); add notes 2 and 3 to Thermal Information table ................................ 4
Changes from Revision F (April 2013) to Revision G
Page
• Added Added Device Information and Pin Configuration and Functions sections, ESD Ratings and updated Thermal
Information tables, Feature Description, Device Functional Modes, Application and Implementation, Power Supply
Recommendations, Layout, Device and Documentation Support , and Mechanical, Packaging, and Orderable
Information sections................................................................................................................................................................ 1
• Deleted obsolete heatsinking information for DDPAK/TO-263 package ............................................................................. 16
Changes from Revision E (April 2013) to Revision F
Page
• Changed layout of National Data Sheet to TI format ........................................................................................................... 19
2
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Copyright © 2007–2015, Texas Instruments Incorporated
Product Folder Links: LP38500-ADJ LP38502-ADJ


Part Number LP38500-ADJ
Description 1.5-A Flexcap Low-Dropout Linear Regulator
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