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Product details

Parameters

Vin (Min) (V) 3.5 Vin (Max) (V) 42 Vout (Min) (V) 3.2 Vout (Max) (V) 9.9 Iout (Max) (A) 3 Iq (Typ) (mA) 0.023 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 Operating temperature range (C) -40 to 150 Rating Automotive Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 16 32 mm² 5 x 6.4 open-in-new Find other Buck converters (integrated switch)

Features

  • 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
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Description

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

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
The LM536033EVM 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 (...)
Features
  • Configurable to meet  the user's need
  • Compact design
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

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 (...)

Features
  • Configurable to meet  the user's need
  • Compact design
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
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 (...)
Features
  • Configurable to meet  the user's need
  • Compact design

Design tools & simulation

SIMULATION MODELS Download
SNVMA46.ZIP (72 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA55.ZIP (62 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA56.ZIP (61 KB) - PSpice Model
SIMULATION MODELS Download
SNVMAB8.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SNVMAB9.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SNVMAC0.ZIP (7 KB) - PSpice Model

Reference designs

Many TI reference designs include the LM53603-Q1 Use our reference design selection tool to review and identify designs that best match your application and parameters.

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 16 View options

Ordering & quality

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