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LM53601-Q1

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3.5V to 36V, 1A Synchronous 2.1MHz Step-Down Converter for Automotive Applications

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3.5V to 36V, 1A Synchronous 2.1MHz Step-Down Converter for Automotive Applications

LM53601-Q1

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Data sheet Order now

Product details

Parameters

Vin (Min) (V) 3.5 Vin (Max) (V) 42 Vout (Min) (V) 3.2 Vout (Max) (V) 6 Iout (Max) (A) 1 Iq (Typ) (uA) 23 Switching frequency (Min) (kHz) 1890 Switching frequency (Max) (kHz) 2400 Features Enable, Fixed Output, Forced PWM, Frequency Synchronization, Light Load Efficiency, Power Good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed, 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

WSON (DSX) 10 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)

Features

  • 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
  • –40°C to 150°C junction temperature range (available)
  • Wide operating input voltage: 3.55 V to 36 V (with transient to 42 V)
  • Spread spectrum option available
  • 2.1-MHz fixed switching frequency
  • Low quiescent current: 23 µA
  • Shutdown current: 1.8 µA
  • Adjustable, 3.3-V, or 5-V output
  • Maximum current load: 650 mA for LM53600-Q1, 1000 mA for LM53601-Q1
  • Pin-selectable forced PWM mode
  • RESET output with filter and delay release
  • External frequency synchronization
  • Internal compensation, soft start, current limit, and UVLO
  • 10-lead, 3-mm × 3-mm SON package with wettable flanks

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Description

The LM53600-Q1 and LM53601-Q1 synchronous buck regulator devices are optimized for automotive applications, providing an output voltage of 5 V, 3.3 V, or an adjustable output. Load current up to 650 mA is supported by the LM53600-Q1, while the LM53601-Q1 supports up to 1000 mA. Advanced high-speed circuitry allows the LM53600-Q1 and LM53601-Q1 devices 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 the device to regulate a 3.3-V output from an input voltage of only 3.8 V. The input voltage range up to 36 V, with transient tolerance of up to 42 V, eases input surge protection design. An open drain reset output, with filtering and delayed release, provides a true indication of system status. This feature negates the requirement for an additional supervisory component, saving cost and board space. Seamless transitions between PWM and PFM modes, along with a quiescent current of only 23 µA, ensures high efficiency and superior transient response at all loads. Few external components are needed allowing the generation of compact PCB layout. While the LM53600-Q1 and LM53601-Q1 devices are Q1 rated, electrical characteristics are ensured across a junction temperature range of –40°C up to 150°C.

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Technical documentation

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Type Title Date
* Datasheet LM53600/01-Q1 0.65-A/1-A, 36-V Synchronous, 2.1-MHz Automotive Step-Down DC/DC Converter datasheet (Rev. C) Apr. 26, 2021
Selection guide Automotive Infotainment EE Buck Converter/Controller Selection Guide (Rev. B) Apr. 15, 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr. 08, 2021
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Technical article How to overcome size, EMI and thermal challenges of automotive LED lighting Apr. 09, 2018
Application note Designing High Performance, Low-EMI, Automotive Power Supplies Sep. 30, 2017
Technical article The value of wettable flank-plated QFN packaging for automotive applications Feb. 03, 2016
User guide LM53600MAEVM and LM53601MAEVM User's Guide Oct. 15, 2015
User guide LM53600NAEVM and LM53601LAEVM User's Guide Oct. 15, 2015

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
49
Description

LM53601LAEVM Demonstrates the capabilities of the LM53601LQDSX Automotive Integrated Buck regulator. It features all the input necessary to configure and operate the device. The EVM has an EMI filter on the back side. The user can choose to bypass that filter using the available posts close to the (...)

Features
  • Configurable to meet  the user's need
  • Compact design
View details
EVALUATION BOARD Download
document-generic User guide
49
Description

LM53601MAEVM Demonstrates the capabilities of the LM53601MQDSX Automotive Integrated Buck regulator. It features all the input necessary to configure and operate the device. The EVM has an EMI filter on the back side. The user can choose to bypass that filter using the available posts close to the (...)

Features
  • Configurable to meet  the user's need
  • Compact design
View details

Design tools & simulation

SIMULATION MODEL Download
SNAM186.ZIP (8 KB) - PSpice Model
SIMULATION MODEL Download
SNAM187.ZIP (143 KB) - PSpice Model
SIMULATION MODEL Download
SNAM188.ZIP (139 KB) - PSpice Model
SIMULATION MODEL Download
SNAM189.ZIP (8 KB) - PSpice Model
SIMULATION MODEL Download
SNAM190.ZIP (141 KB) - PSpice Model
SIMULATION MODEL Download
SNAM191.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
CISPR 25 Class 5 Rated 7.5W Tail-Light Reference Design for Automotive LED Lighting System
TIDA-01348 — This TI Design details a solution for an automotive tail-light application. The design features the TPS92638-Q1 linear LED driver powered by a synchronous buck converter (LM53601-Q1) that is directly supplied from the automotive-battery voltage. This design helps pass CISPR 25 Class 5 conduct (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
45-W, 15-W dual SEPIC LED driver reference design for automotive lighting
TIDA-050029 — This reference design showcases the TPS92682-Q1 dual-channel LED controller used in an automotive front lighting application with high beam (HB) and low beam (LB), daytime running light (DRL), and position (POS) light functionality. The design uses one TPS92682-Q1 device to implement a single-stage (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive Pre-Buck, Post-Boost With CAN Discrete SBC Reference Design
TIDA-01428 — The TIDA-01428 reference design implements a 1-A, wide-VIN, buck converter to 3.3 V followed by a compact, low-input voltage, fixed 5-V boost converter for powering a controller area network (CAN) physical layer interface. The design has been tested for CISPR 25 radiated emissions and conducted (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
15-W System-Level Power Reference Design for Automotive Body Control Module
TIDA-00745 — TIDA-00745 is a 14-W system-optimized (CISPR25 Class 4) SMPS design for an automotive body control module. All buck converters used in this design are switching at 2.1 MHz. 

The design is divided into four major blocks:

  1. EMI filter: Common mode and a differential filter for conducted EMI suppression
  2. (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive Camera Module Reference Design for Uncompressed Digital Video With Wide Vin Front End
PMP10653 — PMP10653.1 is an Optimized Automotive Camera Module Design for Uncompressed Digital Video over Coax cable. The design is broadly divided into four Blocks.
  1. Power Block: This design support Wide Vin, i.e., 4.5V-36V. LM53601 is used for first stage DC/DC conversion, which can deliver 1A at 3.3V output (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WSON (DSX) 10 View options

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