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LMR61428

ACTIVE

1.2V to 14V, 2.85A 2MHz Step-Up Voltage Regulator

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Data sheet

LMR61428

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 1.2 Vin (max) (V) 14 Topology Boost Type Converter Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 2000 Features Enable, Nonsynchronous rectification Vout (min) (V) 1.24 Vout (max) (V) 14 Rating Catalog Operating temperature range (°C) -40 to 85
Vin (min) (V) 1.2 Vin (max) (V) 14 Topology Boost Type Converter Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 2000 Features Enable, Nonsynchronous rectification Vout (min) (V) 1.24 Vout (max) (V) 14 Rating Catalog Operating temperature range (°C) -40 to 85
VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • 1.2V to 14V Input Voltage
  • Adjustable Output Voltage up to 14V
  • Switch Current up to 2.85A
  • Up to 2 MHz Switching Frequency
  • Low Shutdown Iq, <1µA
  • Cycle-by-Cycle Current Limiting
  • VSSOP Packaging (3.0 x 5.0 x 1.09mm)
  • WEBENCH Enabled

Performance Benefits

  • Extremely Easy to Use
  • Tiny Overall Solution Reduces System Cost

SIMPLE SWITCHER is a trademark of Texas Instruments. WEBENCH is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

  • 1.2V to 14V Input Voltage
  • Adjustable Output Voltage up to 14V
  • Switch Current up to 2.85A
  • Up to 2 MHz Switching Frequency
  • Low Shutdown Iq, <1µA
  • Cycle-by-Cycle Current Limiting
  • VSSOP Packaging (3.0 x 5.0 x 1.09mm)
  • WEBENCH Enabled

Performance Benefits

  • Extremely Easy to Use
  • Tiny Overall Solution Reduces System Cost

SIMPLE SWITCHER is a trademark of Texas Instruments. WEBENCH is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

The LMR61428 is a step-up DC-DC switching regulator for battery-powered and low input voltage systems that can achieve efficiencies up to 90%. It has a wide input voltage range from 1.2V to 14V and a possible regulated output voltage range of 1.24V to 14V. It has an internal 0.17Ω N-Channel MOSFET power switch.

The high switching frequency of up to 2MHz of the LMR61428 allows for tiny surface mount inductors and capacitors. Because of the unique constant-duty-cycle gated oscillator topology very high efficiencies are realized over a wide load range. The supply current is reduced to 80µA because of the BiCMOS process technology. In the shutdown mode, the supply current is less than 2.5µA. The LMR61428 is available in a VSSOP-8 package.

The LMR61428 is a step-up DC-DC switching regulator for battery-powered and low input voltage systems that can achieve efficiencies up to 90%. It has a wide input voltage range from 1.2V to 14V and a possible regulated output voltage range of 1.24V to 14V. It has an internal 0.17Ω N-Channel MOSFET power switch.

The high switching frequency of up to 2MHz of the LMR61428 allows for tiny surface mount inductors and capacitors. Because of the unique constant-duty-cycle gated oscillator topology very high efficiencies are realized over a wide load range. The supply current is reduced to 80µA because of the BiCMOS process technology. In the shutdown mode, the supply current is less than 2.5µA. The LMR61428 is available in a VSSOP-8 package.
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Technical documentation

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Type Title Date
* Data sheet LMR61428 Low Input Voltage, Step-Up DC-DC Converter datasheet (Rev. A) 04 Apr 2013
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 Mar 2024
Application note 스트컨버터의 전력계 기본 계산 (Rev. D) PDF | HTML 21 Nov 2022
Application note Basic Calculation of a Boost Converter's Power Stage (Rev. D) PDF | HTML 28 Oct 2022
Application note Working With Boost Converters 15 Jun 2015
User guide AN-2281 LMR61428 Evaluation Module (Rev. A) 26 Apr 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 Apr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 Apr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 Apr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 Apr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 Apr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 Apr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 Apr 2013
Application note Input and Output Capacitor Selection 19 Sep 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 May 2004
Application note Understanding Boost Power Stages In Switchmode Power Supplies 04 Mar 1999

Design & development

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

Evaluation board

LMR61428XMMEVM — LMR61428 Evaluation Module

IntroductionThe LMR61428 evaluation module is designed to provide the power supply design engineer with a fully functional regulatordesign. The evaluation module takes the input from a single Li-Ion battery and boosts the voltage up to 5V at a constant loadcapability of 500mA. The switching (...)
User guide: PDF
Not available on TI.com
Simulation model

LMR61428 TINA Transient Model

SNVM650.ZIP (16 KB) - TINA-TI Spice Model
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Simulation model

LMR61428 TINA Transient Reference Design

SNVM649.ZIP (62 KB) - TINA-TI Reference Design
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Simulation model

LMR61428 Unencrypted PSpice Transient Model

SNVM947.ZIP (3 KB) - PSpice Model
Download
Simulation model

LMR61428 Unencrypted PSpice Transient Model Package (Rev. A)

SNVM050A.ZIP (66 KB) - PSpice Model
Download
Reference designs

PMP30296 — Tiny SEPIC for Low Input Voltage Reference Design

This reference design is for input voltages from 1.8V to 9.6V and the output voltage is 3.3V with 200mA maximum. The LMR61428 works with constant duty-cycle (60%-70%) in burst mode.
Test report: PDF
Schematic: PDF
Package Pins Download
VSSOP (DGK) 8 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

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