LMR14030

ACTIVE

SIMPLE SWITCHER® 40-V, 3.5-A, 2.2-MHz step-down converter with 40-uA 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) 3.5 Iq (Typ) (mA) 0.04 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
  • 3.5 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
  • 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 LMR14030 is a 40 V, 3.5 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. 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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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
NEW LMR33640 ACTIVE SIMPLE SWITCHER® 3.8-V to 36-V, 4-A step-down converter in SOIC-8 package Next-generation 3.8-V to 36-V, 4-A step-down converter in SOIC-8 package.

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
$29.00
Description

The LMR14030SEVM is a fully assembled and tested circuit for evaluating the LMR14030S Step-Down Converter. The LMR14030SEVM operates from 7V to 36V input (12V nominal) and provides a 5.0V or 3.3V output at 3.5A. The board also has jumper connectors to enable or disable the converter operation (...)

Features
  • Input range: 7V to 36V
  • Output: 5.0V or 3.3V
  • Maximum load current: 3.5A
  • Switching frequency: 600KHz
  • Board size: 76mm x 76mm
EVALUATION BOARDS Download
document-generic User guide
$75.00
Description
The TPS254900AQ1 evaluation module (TPS254900AQ1EVM) contains evaluation and reference circuitry for the TPS254900AQ1, which is a USB charging controller and power switch, integrated VBUS and D+/D- short to battery protection, cable compensation, current monitor (IMON) and IEC ESD protection, which (...)
Features
  • Offer VBUS, D+ and D- short to 12V battery protection
  • TPS254900AQ1 Built in IEC 61000-4-2 ESD Protection on DP_IN and DM_IN pins
  • Cable compensation ability up to 5.3V with 2.4A based on cable resistance of 200mΩ
  • Up to 3.2A output current capacity
EVALUATION BOARDS Download
document-generic User guide
$75.00
Description
The TPS254900-Q1 evaluation module (TPS254900Q1EVM-817) contains evaluation and reference circuitry for the TPS254900-Q1, which is a USB charging controller and power switch, integrated VBUS and D+/D- short to battery protection, cable compensation, current monitor (IMON) and IEC ESD protection (...)
Features
Offer VBUS, D+ and D- short to 12V battery protection
TPS254900Q1 Built in IEC 61000-4-2 ESD Protection on DP_IN and DM_IN pins
Cable compensation ability
Up to 5.3V with 2.4A based on cable resistance of 200mΩ Up to 3A output current capacity.

Design tools & simulation

SIMULATION MODELS Download
SNVM707.ZIP (61 KB) - PSpice Model
SIMULATION MODELS Download
SNVM922.ZIP (6 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBD5.ZIP (72 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
Two-Port Automotive USB 2.0 Hub With Short-to-Battery Protection Reference Design
TIDA-00845 — TIDA-00845 is a dual-port USB 2.0 hub with the ability to withstand a short of up to 18-V DC on both downstream ports, as well as Level 4 IEC 61000-4-2 ESD protection, overcurrent conditions, and shorts to ground. This protection is provided by an integrated protection device - the TPD3S714-Q1 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Status Indication Reference Design With LED and Audio Feedback
TIDA-03026 — The TIDA-03026 reference design functionality emulates status indication subsystems in various end equipments. By putting multiple LED drivers in parallel, an array of RGB LEDs can be synchronized to blink, pulse, and breathe - enhancing customer experience. Audio feedback is also integrated to (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Piezo Speaker Strobe Notification Reference Design
TIDA-00376 TIDA-00376 uses Texas Instrument’s industrial piezo driver, flash LED driver, and the ultra-low-power FRAM microcontroller (MCU) to demonstrate the implementation of both audible and visual notification subsystems, primarily intended for fire alert end-equipment systems. The TI Design (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
USB Type-C™ DFP 5V3A Charger Reference Design
PMP11594 — The PMP11594 is a low cost 5V3A charger reference design which provides Type C DFP feature and is compliant with BC1.2 device.  The design includes a non-synchronous step-down regulator LMR14030 and highly integrated USB type-C controller TPS25810. The PMP11594 demonstrates high efficiency (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

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