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LM53602-Q1

ACTIVE

3.5 to 36Vin, 2 Ampere Synchronous DC-DC Converter for Automotive Applications

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Data sheet

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LMQ66420-Q1 ACTIVE Automotive, 36-V, 2-A low-EMI synchronous step-down converter with 1.5-µA IQ Smaller footprint, lower EMI with dual-random spread spectrum and lower IQ.
LMQ66430-Q1 ACTIVE Automotive 36-V, 3-A low EMI synchronous step-down converter with 1.5-µA IQ Smaller footprint, lower EMI with dual-random spread spectrum and lower IQ.

LM53602-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 1850 Switching frequency (max) (kHz) 2350 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Synchronous Rectification Control mode current mode Vout (min) (V) 3.2 Vout (max) (V) 9.9 Iq (typ) (µA) 23 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3.5 Vin (max) (V) 42 Switching frequency (min) (kHz) 1850 Switching frequency (max) (kHz) 2350 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Synchronous Rectification Control mode current mode Vout (min) (V) 3.2 Vout (max) (V) 9.9 Iq (typ) (µA) 23 Duty cycle (max) (%) 98
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • The LM53603-Q1, LM53602-Q1 are available as
    AEC-Q1-Qualified Automotive Grade Products
    With Following Results:
    • Device Temperature Grade 1: –40°C to +125°C
      Ambient Operating Range
    • Device HBM ESD Classification Level 1C
    • Device CDM ESD Classification Level C4B
  • 3 A or 2 A maximum load current
  • Input Voltage Range from 3.5 V to 36 V:
    Transients to 42 V
  • Output Voltage Options: 5 V, 3.3 V, ADJ
  • 2.1 MHz Fixed Switching Frequency
  • ±2% Output Voltage Tolerance
  • –40°C to 150°C Junction Temperature Range
  • 1.7 µA Shutdown Current (typical)
  • 24 µA Input Supply Current at No Load (typical)
  • No external Feed-back Divider Required for 5 V or
    3.3 V output
  • Reset Output With Filter and Delay
  • Automatic Light Load Mode for Improved
    Efficiency
  • User-Selectable Forced PWM mode (FPWM)
  • Built-in Loop Compensation, Soft-start, Current
    Limit, Thermal Shutdown, UVLO, and External
    Frequency Synchronization
  • Thermally Enhanced 16-lead Package:
    5 mm × 4.4 mm × 1 mm
  • The LM53603-Q1, LM53602-Q1 are available as
    AEC-Q1-Qualified Automotive Grade Products
    With Following Results:
    • Device Temperature Grade 1: –40°C to +125°C
      Ambient Operating Range
    • Device HBM ESD Classification Level 1C
    • Device CDM ESD Classification Level C4B
  • 3 A or 2 A maximum load current
  • Input Voltage Range from 3.5 V to 36 V:
    Transients to 42 V
  • Output Voltage Options: 5 V, 3.3 V, ADJ
  • 2.1 MHz Fixed Switching Frequency
  • ±2% Output Voltage Tolerance
  • –40°C to 150°C Junction Temperature Range
  • 1.7 µA Shutdown Current (typical)
  • 24 µA Input Supply Current at No Load (typical)
  • No external Feed-back Divider Required for 5 V or
    3.3 V output
  • Reset Output With Filter and Delay
  • Automatic Light Load Mode for Improved
    Efficiency
  • User-Selectable Forced PWM mode (FPWM)
  • Built-in Loop Compensation, Soft-start, Current
    Limit, Thermal Shutdown, UVLO, and External
    Frequency Synchronization
  • Thermally Enhanced 16-lead Package:
    5 mm × 4.4 mm × 1 mm

The LM53603-Q1, LM53602-Q1 buck regulators are specifically designed for automotive applications, providing an output voltage of 5 V or 3.3 V (with ADJ option) at 3 A or 2 A, from an input voltage of up to 36 V. Advanced high-speed circuitry allows the device to regulate from an input of up to 20 V, while providing an output of 5 V at a switching frequency of 2.1 MHz. The innovative architecture allows the device to regulate a 3.3 V output from an input voltage of only 3.5 V. All aspects of this product are optimized for the automotive customer. 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 no-load operating current of only 24 µA, ensures high efficiency and superior transient response at all loads.

The LM53603-Q1, LM53602-Q1 buck regulators are specifically designed for automotive applications, providing an output voltage of 5 V or 3.3 V (with ADJ option) at 3 A or 2 A, from an input voltage of up to 36 V. Advanced high-speed circuitry allows the device to regulate from an input of up to 20 V, while providing an output of 5 V at a switching frequency of 2.1 MHz. The innovative architecture allows the device to regulate a 3.3 V output from an input voltage of only 3.5 V. All aspects of this product are optimized for the automotive customer. 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 no-load operating current of only 24 µA, ensures high efficiency and superior transient response at all loads.
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Technical documentation

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Type Title Date
* Data sheet LM53603-Q1 (3 A), LM53602-Q1 (2 A) 3.5 V to 36 V Wide-VIN Synchronous 2.1 MHz Step-Down Converters for Automotive Applications datasheet (Rev. B) PDF | HTML 12 May 2016
Application note Design Consideration on Boot Resistor in Buck Converter PDF | HTML 15 May 2023
User guide Single LP8733-Q1 User's Guide to Power DRA78x and TDA3 (Rev. A) PDF | HTML 31 Mar 2021
Application note Designing High Performance, Low-EMI, Automotive Power Supplies 30 Sep 2017
EVM User's guide LM53602xEVM and LM53603xEVM User’s Guide (Rev. A) 23 May 2016

Design & development

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

Evaluation board

LM536035EVM — LM536035 5V Fixed Output, 3A Buck Regulator Evaluation Module

This EVM demonstrates the capabilities of the LM53603 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 converter.

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

LM53603AEVM — LM53603-Q1 Adjustable Output, 3A Buck Regulator Evaluation Module (EVM)

The LM53603AEVM demonstrates the capabilities of the LM53603 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

LM53602 3P3 PSpice Unencrypted Transient Model (Rev. A)

SNVMA57A.ZIP (100 KB) - PSpice Model
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Simulation model

LM53602 5P0 PSpice Unencrypted Transient Model (Rev. A)

SNVMA58A.ZIP (98 KB) - PSpice Model
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Simulation model

LM53602 Adjustable PSpice Transient Model

SNVMA59.ZIP (63 KB) - PSpice Model
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Simulation model

LM53602 Unencrypted Adjustable PSpice Transient Model

SNVMAC1.ZIP (7 KB) - PSpice Model
Download
Reference designs

TIDEP-0091 — Power optimization for 77GHz-level transmitter reference design

TIDEP-0091 highlights strategies for power optimization of IWR14xx 76- to 81-GHz mmWave sensors in tank level-probing applications, displacement sensors, 4- to 20-mA sensors and other low-power applications for detecting range with high accuracy in a minimal power envelope. In these (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP10651 — 2.2MHz Switching, Synchronous Split Supply Reference Design for 12V Battery with all Protections

PMP10651 is a low noise, multi-output SMPS design where LM53603 is used in Inverting Buck-Boost Fly buck topology to generate positive and negative supply needed in multiple noise sensitive applications such as powering High Speed Video Amplifier, RF amplifier, Precision Low noise amplifier (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
HTSSOP (PWP) 16 Ultra Librarian
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