LMR14020

ACTIVE

SIMPLE SWITCHER, 4-V to 40-V, 2-A 2.2-MHz step-down converter with Low IQ

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Product details

Parameters

Vin (Min) (V) 4 Vin (Max) (V) 40 Vout (Min) (V) 1 Vout (Max) (V) 36 Iout (Max) (A) 2 Iq (Typ) (mA) 0.04 Iq (Typ) (uA) 40 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2500 Features Enable, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Tracking, UVLO Adjustable, Soft Start Adjustable Operating temperature range (C) -40 to 125 Rating Catalog 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 open-in-new Find other Buck converters (integrated switch)

Features

  • 4 V to 40 V Input Range
  • 2 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
  • 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 LMR14020 is a 40 V, 2 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. 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.

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LMR33620 ACTIVE SIMPLE SWITCHER® 3.8V to 36V, 2A Synchronous Buck Converter With Ultra-Low EMI Next-generation 3.8-V to 36-V, 2-A synchronous buck converter with ultra-low EMI.

Technical documentation

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Type Title Date
* Datasheet LMR14020 SIMPLE SWITCHER® 40 V 2 A, 2.2 MHz Step-Down Converter with 40 µA IQ datasheet (Rev. A) Apr. 08, 2015
Application notes Simple Solution for EMI Filter Stability Issue in DC/DC Converters (Rev. A) Apr. 25, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes How to Evaluate Junction Temperature Properly with Thermal Metrics (Rev. B) Mar. 29, 2019
Application notes How SYNC Logic Affects EMI Performance for Dual-Channel Buck Converters Apr. 27, 2018
Application notes Design Feedforward Capacitor for LMR14020 Dec. 20, 2017
Application notes How to Evaluate the Maximum Inductor in Internal Compensation PCM Buck Converter Sep. 20, 2017
Application notes Extending Buck Regulator to Positive Buck-Boost Configuration Sep. 02, 2017
User guides LMR14020EVM User’s Guide Jan. 30, 2015
Application notes AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) Apr. 24, 2013
Application notes AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) Apr. 23, 2013
Application notes AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) Apr. 23, 2013
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations Jul. 12, 2005
Application notes AN-643 EMI/RFI Board Design (Rev. B) May 03, 2004

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
29
Description

The LMR14020SEVM is a fully assembled and tested circuit for evaluating the LMR14020S Step-Down Converter. The LMR14020SEVM operates from 7V to 30V input (12V nominal) and provides a 5.0V or 3.3V output at 2A. The board also has jumper connectors to enable or disable the converter operation, change (...)

Features
  • Input range: 7V to 30V
  • Output: 5.0V or 3.3V
  • Maximum load current: 2A
  • Switching frequency: 1.6MHz
  • Board size: 76mm x 76mm

Design tools & simulation

SIMULATION MODELS Download
SNVM706.ZIP (61 KB) - PSpice Model
SIMULATION MODELS Download
SNVM818.ZIP (6 KB) - PSpice Model
SIMULATION MODELS Download
SNVMB55.ZIP (30 KB) - PSpice Model
SIMULATION TOOLS 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
  • (...)

Reference designs

REFERENCE DESIGNS Download
98% Efficiency Analog 24V to 36V, 500W Backup and 50W Charger Reference Design for DC UPS
TIDA-01558 — This analog, bidirectional power conversion reference design has a discharge or boost stage of 500 W and charge or buck stage of 50 W. This reference  design is made for 24-V battery pack and 30-V to 38-V bus voltage for use in DC-UPS, battery backup unit (BBU), local energy storage (LES) and (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

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