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LM53625-Q1

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2.5/3.5A, 36 V Synchronous, 2.1MHz, Automotive Step Down DC-DC Converter

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2.5/3.5A, 36 V Synchronous, 2.1MHz, Automotive Step Down DC-DC Converter

LM53625-Q1

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Product details

Parameters

Vin (Min) (V) 3.5 Vin (Max) (V) 42 Vout (Min) (V) 3.2 Vout (Max) (V) 10 Iout (Max) (A) 2.5 Iq (Typ) (uA) 18 Switching frequency (Min) (kHz) 1850 Switching frequency (Max) (kHz) 2350 Features Enable, Fixed Output, Forced PWM, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable Flanks Package Operating temperature range (C) -40 to 150 Rating Automotive Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VQFN-HR (RNL) 22 20 mm² 4 x 5 open-in-new Find other Buck converters (integrated switch)

Features

  • AEC-Q100 Automotive Qualified:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM Classification Level 2
    • Device CDM Classification Level C6
  • –40°C to +150°C Junction Temperature Range
  • 15-µA Quiescent Current at no Load (Typical) with 3.3-V Output
  • 4 mm × 5 mm, 0.5-mm Pitch VQFN Package With Wettable Flanks and 0.6-mm VIN Spacing
  • Low EMI and Switch Noise
  • Spread Spectrum Option
  • External Frequency Synchronization
  • RESET Output with Internal Filter and 3-ms Release Timer
  • Pin-Selectable Forced PWM Mode
  • Built-In Compensation, Soft Start, Current Limit, Thermal Shutdown, and UVLO
  • 0.6-V Dropout at 3.5 A at 105°C TA
  • ±1% Output Voltage Tolerance (–40°C to 125°C TJ)
  • Available With Fixed 5-V, 3.3-V or Adjustable Output
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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 18 V to an output of 3.3 V at a fixed frequency of 2.1 MHz. Innovative architecture allows this device to regulate a 3.3-V output from an input voltage of only 3.55 V. All aspects of the LM53625-Q1/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. The automotive-qualified Hotrod QFN package with wettable flanks reduces parasitic inductance and resistance while increasing efficiency, minimizing switch node ringing, and dramatically lowering electromagnetic interference (EMI). An open-drain reset output, with built-in 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 and low quiescent current (only 15 µA for the 3.3 V option) ensure high efficiency and superior transient responses at all loads.

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Technical documentation

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Type Title Date
* Data sheet LM53625/35-Q1, 2.5-A or 3.5-A, 36-V Synchronous, 2.1-MHz, Step-Down DC-DC Converter datasheet (Rev. A) May 13, 2016
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr. 08, 2021
Technical article Optimizing flip-chip IC thermal performance in automotive designs Dec. 11, 2019
Technical article How to meet European Commission ADAS requirements with TI DC/DC converters May 09, 2019
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guide Automated Parking System Reference Design Using 77-GHz mmWave Sensor Jan. 24, 2019
Technical article How a DC/DC converter package and pinout design can enhance automotive EMI performance Sep. 04, 2018
Application note Designing High Performance, Low-EMI, Automotive Power Supplies Sep. 30, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
299
Description

The AWR1843 BoosterPack™ plug-in module is an easy-to-use 77GHz mmWave sensor evaluation board for the single-chip AWR1843 device, with direct connectivity to the TI MCU LaunchPad™ development-kit ecosystem.

The BoosterPack™ contains everything required to start developing software for on-chip (...)

Features
  • Onboard antenna enables field testing
  • XDS110-based JTAG with serial-port interface for flash programming
  • UART-to-USB interface for control, configuration, and data visualization
  • TI LaunchPad development-kit interface to seamlessly connect to TI MCUs
  • CAN connector enables direct interfact to car units
View details
EVALUATION BOARD Download
document-generic User guide
299
Description

The IWR1843 BoosterPack™ plug-in module is an easy-to-use 77GHz mmWave sensor evaluation board for the single-chip IWR1843 device, with direct connectivity to the TI MCU LaunchPad™ development-kit ecosystem.

The BoosterPack™ contains everything required to start developing software for on-chip (...)

Features
  • Onboard antenna enables field testing
  • XDS110-based JTAG with serial-port interface for flash programming
  • UART-to-USB interface for control, configuration, and data visualization
  • TI LaunchPad development-kit interface to seamlessly connect to TI MCUs
  • CAN connector enables direct interfact to car units
View details
EVALUATION BOARD Download
document-generic User guide
49
Description
This EVM demonstrates the capabilities of the LM536253 automotive integrated buck converter. The EVM has an EMI filter on the back side that assists with noise reduction. The user can choose to bypass that EMI filter using  VIN1/GND1 posts . The EVM operates from an 3.5V to 36V input (up to 42V (...)
Features
  • High Efficiency with 2.1MHz and Auto Light Mode PFM/PWM or Forced PWM Mode operation
  • /RESET Power Good output with 3ms delay on timer
  • External Frequency Synchronisation Input
  • Low EMI
  • Fully Synchronous with integrated HS and LS FET
View details
EVALUATION BOARD Download
document-generic User guide
199
Description

MMWAVEICBOOST carrier card expands capabilities of select mmWave Evaluation modules. This board provides advanced software developement , debug features like trace and single step via TI’s Code Composers compatible debuggers. Onboard Launchpad interface enables pairing with TI’s Booster (...)

Features
  • Modular connectivity to mmWave antenna plug-in module
  • BoosterPack™ plug-in module interface
  • Debug and emulation through onboard XDS110
  • DCA1000EVM interface for raw ADC data capture
  • Compatible with mmWave studio (MMWAVE-STUDIO) tools, including mmWave demo visualizer (MMWAVE-DEMO-VISUALIZER)
View details

Design tools & simulation

SIMULATION MODEL Download
SNVMAN5.ZIP (120 KB) - PSpice Model
SIMULATION MODEL Download
SNVMAN6.ZIP (8 KB) - PSpice Model
SIMULATION MODEL Download
SNVMAN7.ZIP (117 KB) - PSpice Model
SIMULATION MODEL Download
SNVMAN8.ZIP (7 KB) - PSpice Model
SIMULATION MODEL Download
SNVMAO1.ZIP (120 KB) - PSpice Model
SIMULATION MODEL Download
SNVMAO2.ZIP (8 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
View details

Reference designs

REFERENCE DESIGNS Download
Automotive 77-GHz radar module reference design with object data output
TIDA-01570 — TIDA-01570 is a reference design for a 76- to 81-GHz radar sensor module. The power supplies on board convert the automotive battery input to the required rails for the radar analog front end (AFE), processors and CAN-FD transceiver. After processing, object data is provided over the included N-FD (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive RFCMOS 77GHz radar module reference design with object data output over dual CAN FD
TIDA-020004 — This reference design is a solution for a 76 to 81 GHz radar sensor module. The power supplies on board convert the automotive battery input to the required rails for the radar AFE, processors and CAN FD transceiver. All of these functions are included in a small form factor PCB suitable for front (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive mmWave radar gesture control reference design
TIDA-020011 — This reference design utilizes mmWave Radar and a full automotive power design to provide a sleek, simple solution to capture hand gestures and improve the experience of the driver. The evolution of the automobile has led to the desire for simpler and easier interaction with the ever increasing (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Small automotive front-end 16-W power reference design
PMP30548 — This reference design is an automotive front-end power supply able to provide 16 W for the 12-V car battery. The first stage is a pre-boost LM5150-Q1 to maintain a stable, mid-rail voltage of 8.5 V during cold-crank operation. Two downstream buck converters are able to handle jump start requirements (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
High efficiency power supply architecture reference design for protection relay processor module
TIDA-010011 — This reference design showcases various power architectures for generating multiple voltage rails for an application processor module, requiring >1A load current and high efficiency . The required power supply is generated using 5-, 12- or 24-V DC input from the backplane. Power supplies are (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive Stand-Alone Gateway Reference Design with Ethernet and CAN
TIDA-01425 — The TIDA-01425 is a subsystem reference design for automotive gateways focused on increasing bandwidth and processing power in gateway applications. The design implements Ethernet physical layer transceivers (PHYs) for increased bandwidth along with an automotive processor for greater processing (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN-HR (RNL) 22 View options

Ordering & quality

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  • Ongoing reliability monitoring

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