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LM53601-Q1

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Automotive 3.5-V to 36-V, 1-A synchronous 2.1-MHz step-down converter

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LMR50410-Q1 ACTIVE Automotive qualified SIMPLE SWITCHER 4-V to 36-V, 1-A synchronous step-down converter Higher output voltage range, SOT23 package

LM53601-Q1

ACTIVE
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Product details

Rating Automotive Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 3.5 Vin (max) (V) 42 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 EMI features Spread Spectrum Control mode current mode Vout (min) (V) 3.2 Vout (max) (V) 6 Iq (typ) (µA) 23 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 3.5 Vin (max) (V) 42 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 EMI features Spread Spectrum Control mode current mode Vout (min) (V) 3.2 Vout (max) (V) 6 Iq (typ) (µA) 23 Duty cycle (max) (%) 98
WSON (DSX) 10 9 mm² 3 x 3
  • 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 and non-wettable flanks
  • 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 and non-wettable flanks

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.

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
* Data sheet LM53600/01-Q1 0.65-A/1-A, 36-V Synchronous, 2.1-MHz Automotive Step-Down DC/DC Converter datasheet (Rev. D) PDF | HTML 14 May 2021
Selection guide Automotive Infotainment EE Buck Converter/Controller Selection Guide (Rev. B) 15 Apr 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Technical article How to overcome size, EMI and thermal challenges of automotive LED lighting PDF | HTML 09 Apr 2018
Application note Designing High Performance, Low-EMI, Automotive Power Supplies 30 Sep 2017
Technical article The value of wettable flank-plated QFN packaging for automotive applications PDF | HTML 03 Feb 2016
EVM User's guide LM53600MAEVM and LM53601MAEVM User's Guide 15 Oct 2015
EVM User's guide LM53600NAEVM and LM53601LAEVM User's Guide 15 Oct 2015

Design & development

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

Evaluation board

LM53601LAEVM — LM53601-Q1 5V Output, 1000mA Buck Regulator Evaluation Module With Spread Spectrum

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 (...)

User guide: PDF
Not available on TI.com
Evaluation board

LM53601MAEVM — LM53601-Q1 Adjustable Output, 1000mA Buck Regulator Evaluation Module With Spread Spectrum

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 (...)

User guide: PDF
Not available on TI.com
Simulation model

LM536013-Q1 PSpice Transient Model

SNAM187.ZIP (143 KB) - PSpice Model
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Simulation model

LM536013-Q1 Unencrypted PSpice Transient Model

SNAM186.ZIP (8 KB) - PSpice Model
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Simulation model

LM536015-Q1 PSpice Transient Model

SNAM188.ZIP (139 KB) - PSpice Model
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Simulation model

LM536015-Q1 Unencrypted PSpice Transient Model

SNAM189.ZIP (8 KB) - PSpice Model
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Simulation model

LM53601A-Q1 PSpice Unencrypted Transient Model (Rev. A)

SNAM190A.ZIP (313 KB) - PSpice Model
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Reference designs

TIDA-01428 — Automotive Pre-Buck, Post-Boost With CAN Discrete SBC Reference Design

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-050029 — 45-W, 15-W dual SEPIC LED driver reference design for automotive lighting

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01348 — CISPR 25 Class 5 Rated 7.5W Tail-Light Reference Design for Automotive LED Lighting System

This reference design is for automotive tail-light applications. The design features 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 emission (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00745 — 15-W System-Level Power Reference Design for Automotive Body Control Module

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. (...)
Design guide: PDF
Schematic: PDF
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