Product Folder Sample & Buy Support & Community Tools & Software Technical Documents LM53625-Q1, LM53635-Q1 SNVSAA7 – DECEMBER 2015 1 Features 3 Description • • 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. 1 • • • • • • • • • • • • • • • • • • • • • • 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 • • • • 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) LM536253QRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L536253 LM536253QRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 L536253 LM536255QRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L536255 LM536255QRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 L536255 LM53625AQRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L53625A LM53625AQRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 L53625A LM53625LQRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L53625L LM53625LQRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 L53625L LM53625MQRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L53625M LM53625MQRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 L53625M LM53625NQRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L53625N LM53625NQRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 L53625N LM536353QRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L536353 LM536353QRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 L536353 LM536355QRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L536355 LM536355QRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 L536355 LM53635AQRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L53635A LM53635AQRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 L53635A LM53635LQRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L53635L LM53635LQRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 L53635L LM53635MQRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L53635M LM53635MQRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 L53635M LM53635NQRNLRQ1 PREVIEW VQFN-HR RNL 22 3000 TBD Call TI Call TI -40 to 125 L53635N LM53635NQRNLTQ1 PREVIEW VQFN-HR RNL 22 250 TBD Call TI Call TI -40 to 125 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. 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