LMR14050-Q1

ACTIVE

SIMPLE SWITCHER® Automotive 40V, 5A, 2.2MHz Step-Down Converter with 40uA IQ

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Product details

Parameters

Vin (Min) (V) 4 Vin (Max) (V) 40 Vout (Min) (V) 0.8 Vout (Max) (V) 28 Iout (Max) (A) 5 Iq (Typ) (mA) 0.04 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2500 Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 WSON (DPR) 10 16 mm² 4 x 4 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 ESD Classification Level H1C
    - Device CDM ESD Classification Level C4A
  • 4 V to 40 V Input Range
  • 5 A Continuous Output Current
  • Ultra-low 40 µA Operating Quiescent Current
  • 90 mΩ High-Side MOSFET
  • Minimum Switch-On Time: 75 ns
  • Current Mode Control
  • Adjustable Switching Frequency from 200 kHz to
    2.5 MHz
  • Frequency Synchronization to External Clock
  • Spread Spectrum Option for Reduced EMI
  • Internal Compensation for Ease of Use
  • High Duty Cycle Operation Supported
  • Precision Enable Input
  • 1 µA Shutdown Current
  • External Soft-start
  • Thermal, Overvoltage and Short Protection
  • 8-Pin HSOIC with PowerPAD™ Package
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Description

The LMR14050-Q1 is a 40 V, 5 A step down regulator with an integrated high-side MOSFET. With a wide input range from 4 V to 40 V, it’s suitable for various applications from industrial to automotive for power conditioning from unregulated sources. An extended family is available in 2 A and 3.5 A options in pin-to-pin compatible packages, including LMR14020-Q1 and LMR14030-Q1. The regulator’s quiescent current is 40 µA in Sleep-mode, which is suitable for battery powered systems. An ultra-low 1 µA current in shutdown mode can further prolong battery life. A wide adjustable switching frequency range allows either efficiency or external component size to be optimized. Internal loop compensation means that the user is free from the tedious task of loop compensation design. This also minimizes the external components of the device. A precision enable input allows simplification of regulator control and system power sequencing. The device also has built-in protection features such as cycle-by-cycle current limit, thermal sensing and shutdown due to excessive power dissipation, and output overvoltage protection.

The LMR14050-Q1 is available in an 8-pin HSOIC or 10-pin WSON package with exposed pad for low thermal resistance.

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Download

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 LMR14050QDPREVM is a fully assembled and tested circuit for evaluating the LMR14050QDPRRQ1 Step-Down Converter. The LMR14050QDPREVM operates from 7V to 40V input (12V nominal) and provides a 5.0V or 3.3V output at 5A. The board has jumper connectors to enable or disable the converter operation (...)
Features
  • 7V to 40V Input Voltage Range
  • Jump Selectable Output Options (5.0V to 3.3V)
  • Up to 5A Output Current
  • Switching Frequency 400KHz
  • Internal Compensation
EVALUATION BOARDS Download
document-generic User guide
$29.00
Description

The LMR14050SEVM is a fully assembled and tested circuit for evaluating the LMR14050S Step-Down Converter. The LMR14050SEVM operates from 7V to 36V input (12V nominal) and provides a 5.0V or 3.3V output at 5A. The board also has jumper connectors to enable or disable the converter operation, change (...)

Features
  • Input range: 7V to 36V
  • Output: 5.0V or 3.3V
  • Maximum load current: 5A
  • Switching frequency: 400KHz
  • Board size: 76mm x 76mm

Design tools & simulation

SIMULATION MODELS Download
SNVM708.ZIP (62 KB) - PSpice Model
SIMULATION MODELS Download
SNVM923.ZIP (6 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
Automotive 2.4A Dual-Port USB Hub Reference Design With Short-to-Battery Protection
TIDA-00887 The TIDA-00887 is comprised of a two-port USB 2.0 hub with short-to-battery (STB) and short-circuit protection on both downstream ports provided by the TPD3S716-Q1. Both downstream ports are configured either as a custom divider mode or a dedicated charging port (DCP) provided by the TUSB4020BI-Q1 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options
WSON (DPR) 10 View options

Ordering & quality

Support & training

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