Texas Instruments | LM61440-Q1 Automotive 3-V to 36-V, 4-A, Low-Noise Synchronous Step-Down Converter | Datasheet | Texas Instruments LM61440-Q1 Automotive 3-V to 36-V, 4-A, Low-Noise Synchronous Step-Down Converter Datasheet

Texas Instruments LM61440-Q1 Automotive 3-V to 36-V, 4-A, Low-Noise Synchronous Step-Down Converter Datasheet
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LM61440-Q1
SNVSBG0 – MAY 2019
LM61440-Q1 Automotive 3-V to 36-V, 4-A, Low-Noise Synchronous Step-Down Converter
1 Features
2 Applications
•
•
•
•
•
•
•
AEC-Q100 qualified for automotive applications
– Device temperature grade 1, TA range –40°C
to +125°C , and TJ range –40°C to +150°C
Low EMI
– Adjustable SW node rise time
– Spread spectrum to reduce peak emissions
– Frequency adjust or synchronize over
200 kHz – 2.2 MHz range
– FPWM when synchronized for constant
frequency at light loads
– 4 mm × 3.5 mm low-EMI VQFN-HR package
(with wettable flanks) and pinout
High efficiency power conversion at all loads
– 8-µA standby current with VIN = 13.5 V, VOUT =
3.3 V, no load
– Frequency foldback in light load for improved
efficiency with Auto Mode
– Low MOSFET ON Resistance
RDS_ON_HS = 41 mΩ (typical)
RDS_ON_LS = 21 mΩ (typical)
Wide Conversion Range
– Input voltage: 3 V to 36 V
– Output voltage adjustable from 1 V to 95% of
VIN
– DC load current: 0 A to 4 A
– tON_MIN = 50 ns (typical)
– tOFF_MIN = 70 ns (typical)
PGood output with filter and delayed release
Built-in compensation, soft start, current limits,
hiccup protection, thermal shutdown, and UVLO
Automotive infotainment & cluster, head unit,
media hub, USB charge, display
Automotive ADAS and body applications
Battery powered subsystems
•
•
3 Description
The LM61440-Q1 is an automotive-focused
synchronous step-down buck converter providing
adjustable output voltage and 0 to 4 A DC load
current from a supply voltage ranging from 3.0 V to
36 V. The LM61440-Q1 is designed from the ground
up for minimal EMI. The device incorporates pseudorandom spread spectrum, adjustable SW node rise
time, and low-EMI VQFN-HR package featuring low
ringing and optimal-layout-friendly pinout. Switching
frequency can be set or synchronized between 200
kHz and 2.2 MHz to avoid noise sensitive frequency
bands, and for improved efficiency at low operating
frequency or smaller solution size at high frequency.
Factory auto-mode enables frequency foldback when
operating with light loads, allowing an unloaded
current consumption of only 8 µA (typical) and high
efficiency with light loads. Together with very low
MOSFET ON resistances and optional external bias
input, exceptional efficiency is achieved over entire
load range. The device also provides an open-drain
PGood output and comprehensive protection
features. Electrical characteristics are specified over
a junction temperature range of –40°C to +150°C.
Device Information(1)
PART NUMBER
LM61440-Q1
Efficiency VIN=13.5 V FSW=400 kHz
Simplified Schematic
PGND1
BODY SIZE (NOM)
4.00 mm × 3.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
100
3.0 V to 36 V input
VIN1
PACKAGE
VQFN-HR (14)
95
VIN2
90
PGND2
PGOOD
EN/SYNC
RT
VCC
SW
CBOOT
Efficiency (%)
85
BIAS
80
75
70
65
RBOOT
FB
60
VOUT = 3.3 V
VOUT = 5 V
55
AGND
50
0.001
0.005
0.02 0.05 0.1 0.2
Load Current (A)
0.5
1
2 34
Eff-
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. ADVANCE INFORMATION for pre-production products; subject to
change without notice.
ADVANCE INFORMATION
1
LM61440-Q1
SNVSBG0 – MAY 2019
www.ti.com
Table of Contents
1
2
3
4
5
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Device and Documentation Support....................
5.2
5.3
5.4
5.5
1
1
1
2
3
6
5.1 Receiving Notification of Documentation Updates.... 3
Community Resources..............................................
Trademarks ...............................................................
Electrostatic Discharge Caution ................................
Glossary ....................................................................
3
3
3
3
Mechanical, Packaging, and Orderable
Information ............................................................. 3
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
DATE
REVISION
NOTES
May 2019
*
Initial release
ADVANCE INFORMATION
2
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
Product Folder Links: LM61440-Q1
LM61440-Q1
www.ti.com
SNVSBG0 – MAY 2019
5 Device and Documentation Support
5.1 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
5.2 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.
5.3 Trademarks
E2E is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
5.4 Electrostatic Discharge Caution
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
5.5 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
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.
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
Product Folder Links: LM61440-Q1
3
ADVANCE INFORMATION
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
PACKAGE OPTION ADDENDUM
www.ti.com
31-May-2019
PACKAGING INFORMATION
Orderable Device
Status
(1)
PLM61440AASQRJRTQ1
PREVIEW
Package Type Package Pins Package
Drawing
Qty
VQFN-HR
RJR
14
250
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
TBD
Call TI
Call TI
Op Temp (°C)
Device Marking
(4/5)
-40 to 150
(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.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(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.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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.
OTHER QUALIFIED VERSIONS OF LM61440-Q1 :
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
31-May-2019
• Catalog: LM61440
NOTE: Qualified Version Definitions:
• Catalog - TI's standard catalog product
Addendum-Page 2
IMPORTANT NOTICE AND DISCLAIMER
TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE
DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS”
AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY
IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD
PARTY INTELLECTUAL PROPERTY RIGHTS.
These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate
TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable
standards, and any other safety, security, or other requirements. These resources are subject to change without notice. TI grants you
permission to use these resources only for development of an application that uses the TI products described in the resource. Other
reproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third
party intellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims,
damages, costs, losses, and liabilities arising out of your use of these resources.
TI’s products are provided subject to TI’s Terms of Sale (www.ti.com/legal/termsofsale.html) or other applicable terms available either on
ti.com or provided in conjunction with such TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable
warranties or warranty disclaimers for TI products.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2019, Texas Instruments Incorporated
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