TI1 LM53625AQRNLTQ1 Automotive step down dc-dc converter Datasheet

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LM53625-Q1, LM53635-Q1
SNVSAA7 – DECEMBER 2015
1 Features
3 Description
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The LM53625-Q1/LM53635-Q1 synchronous buck
regulator is optimized for automotive applications,
providing an output voltage of 5 V, 3.3 V, or an
adjustable output. Advanced high speed circuitry
allows the LM53625-Q1/LM53635-Q1 to regulate
from an input of 13.5 V to an output 3.3 V at a fixed
frequency of 2.1MHz. Innovative architecture allows
the device to regulate a 3.3 V output from an input
voltage of only 3.5 V. All aspects of the LM53625Q1/LM53635-Q1 are optimized for automotive and
performance driven industrial customers. An input
voltage range up to 36 V, with transient tolerance up
to 42 V, eases input surge protection design. An open
drain reset output, with filtering and delay, provides a
true indication of system status. This feature negates
the requirement for an additional supervisory
component, saving cost and board space. Seamless
transition between PWM and PFM modes, along with
a quiescent current of only 15-µA for 3.3 V option,
ensures high efficiency and superior transient
response at all loads.
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Qualified for Automotive Applications
AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM Classification Level 2
– Device CDM Classification Level C5
4 mm x 5 mm, 0.5 mm Pitch SON Package with
Wettable Flanks and 0.6 mm VIN Spacing
-40°C to 150°C Junction Temperature Range
Current Mode Control with Internal Compensation
2.1MHz (±10%) Fixed Switching Frequency
Low EMI
Spread Spectrum as a Factory Option
Min OFF Time-80ns (maximum)
Min ON Time-60ns (maximum)
External Frequency Synchronization
RESET Output with Filter and 3ms Release Timer
Automatic Light Load Mode for Improved
Efficiency
Pin Selectable Forced PWM Mode
Built in Compensation, Soft-start, Current Limit,
Thermal Shutdown and UVLO
3.5 V to 36 V Input Voltage with Transients up to
42 V
LM53625-Q1 = 2.5 A Maximum Load Current
LM53635-Q1 = 3.5 A Maximum Load Current
91% Efficiency while Converting 13.5 V to 5 V, 3.5
A
0.6 V Dropout at 3.5 A Load, 1.4 V @ 1.85MHz @
105ºC TA
Output Voltage Options: 5 V, 3.3 V and Adjustable
±1.5% Output Voltage Tolerance (over
temperature)
2-µA Shutdown Current (typical)
15-µA Iq - Quiescent Current at no Load (Typical)
with 3.3 V Typical
2 Applications
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Automotive Telematics
Navigation Systems
In-Dash Instrumentation
Battery-Powered Applications
Device Information(1)
DEVICE NAME
LM53625-Q1
PACKAGE
BODY SIZE
SON (22)
LM53635-Q1
4 mm x 5 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Circuit
VSUPPLY
10µF
PVIN 1
PVIN 2
PGND1
PGND2
10µF
10µF
RESET
AVIN
VCC
LM53625/35
SYNC
2.2µF
AGND
NC
FPWM
EN
CBIAS
FB
CBOOT
470nF
SW
VOUT
L1=2.2µH
3 X 22µF
Automotive Wide-VIN Buck Convertor, 3.5V to 36 V input, available in 3.3 V, 5.0 V
and Adjustable output.
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. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.
PRODUCT PREVIEW
LM53625/35-Q1, 2.5/3.5A, 36 V Wide-VINSynchronous, 2.1MHz, Automotive Step Down DCDC Converter
LM53625-Q1, LM53635-Q1
SNVSAA7 – DECEMBER 2015
www.ti.com
Table of Contents
1
2
3
4
5
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Device and Documentation Support....................
1
1
1
2
3
5.1 Documentation Support ............................................ 3
5.2
5.3
5.4
5.5
5.6
6
Related Links ............................................................
Community Resources..............................................
Trademarks ...............................................................
Electrostatic Discharge Caution ................................
Glossary ....................................................................
3
3
3
3
3
Mechanical, Packaging, and Orderable
Information ............................................................. 4
4 Revision History
DATE
REVISION
NOTES
December 2015
*
Initial release.
PRODUCT PREVIEW
2
Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: LM53625-Q1 LM53635-Q1
LM53625-Q1, LM53635-Q1
www.ti.com
SNVSAA7 – DECEMBER 2015
5 Device and Documentation Support
5.1 Documentation Support
5.1.1 Related Documentation
Table 1. Resources for Thermal PCB Design
TITLE
LINK
AN-2020 Thermal Design By Insight, Not Hindsight
SNVA419
AN-1520 A Guide to Board Layout for Best Thermal Resistance for
Exposed Pad Packages
SNVA183
SPRA953B Semiconductor and IC Package Thermal Metrics
SPRA953
SNVA719 Thermal Design made Simple with LM43603 and
LM43602
SNVA719
SLMA002 PowerPAD™ Thermally Enhanced Package
SLMA002
SLMA004 PowerPAD Made Easy
SLMA004
The table below lists quick access links. Categories include technical documents, support and community
resources, tools and software, and quick access to sample or buy.
Table 2. Related Links
PARTS
PRODUCT FOLDER
SAMPLE & BUY
TECHNICAL
DOCUMENTS
TOOLS &
SOFTWARE
SUPPORT &
COMMUNITY
LM53625-Q1
Click here
Click here
Click here
Click here
Click here
LM53635-Q1
Click here
Click here
Click here
Click here
Click here
5.3 Community Resources
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective
contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of
Use.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
5.4 Trademarks
PowerPAD, E2E are trademarks of Texas Instruments.
5.5 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
5.6 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: LM53625-Q1 LM53635-Q1
3
PRODUCT PREVIEW
5.2 Related Links
LM53625-Q1, LM53635-Q1
SNVSAA7 – DECEMBER 2015
www.ti.com
6 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
PRODUCT PREVIEW
4
Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: LM53625-Q1 LM53635-Q1
PACKAGE OPTION ADDENDUM
www.ti.com
8-Apr-2016
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
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L53635N
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
8-Apr-2016
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3)
MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4)
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5)
Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
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In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 2
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