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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

Rating Catalog Topology Boost, SEPIC Vin (max) (V) 14 Vin (min) (V) 1.2 Vout (max) (V) 14 Vout (min) (V) 1.24 Switch current limit (typ) (A) 2.85 Features Enable, Nonsynchronous rectification Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0001 Duty cycle (max) (%) 70
Rating Catalog Topology Boost, SEPIC Vin (max) (V) 14 Vin (min) (V) 1.2 Vout (max) (V) 14 Vout (min) (V) 1.24 Switch current limit (typ) (A) 2.85 Features Enable, Nonsynchronous rectification Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.0001 Duty cycle (max) (%) 70
VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • 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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Top documentation Type Title Format options Date
* Data sheet LMR61428 Low Input Voltage, Step-Up DC-DC Converter datasheet (Rev. A) Apr 4, 2013
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML Mar 25, 2024
Application note Basic Calculation of a Boost Converter's Power Stage (Rev. D) PDF | HTML Oct 28, 2022
Application note Working With Boost Converters Jun 15, 2015
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) Apr 24, 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) Apr 23, 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) Apr 23, 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) Apr 23, 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) Apr 23, 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) Apr 23, 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) Apr 23, 2013
Application note Input and Output Capacitor Selection Sep 19, 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations Jul 12, 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) May 3, 2004
Application note Understanding Boost Power Stages In Switchmode Power Supplies Mar 4, 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
Supported products & hardware
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Simulation model

LMR61428 TINA Transient Model

SNVM650.ZIP (16 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

LMR61428 TINA Transient Reference Design

SNVM649.ZIP (62 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

LMR61428 Unencrypted PSpice Transient Model

SNVM947.ZIP (3 KB) - PSpice model
Supported products & hardware
Simulation model

LMR61428 Unencrypted PSpice Transient Model Package (Rev. A)

SNVM050A.ZIP (66 KB) - PSpice model
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
VSSOP (DGK) 8 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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