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Product details

Parameters

Vin (Min) (V) 1.2 Vin (Max) (V) 14 Vout (Min) (V) 1.24 Vout (Max) (V) 14 Switch current limit (Typ) (A) 2.85 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 2000 Iq (Typ) (mA) 0.1 Features Enable Duty cycle (Max) (%) 70 Operating temperature range (C) -40 to 85 Rating Catalog open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Boost converters (integrated switch)

Features

  • 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.

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Description

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

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 16
Type Title Date
* Datasheet LMR61428 Low Input Voltage, Step-Up DC-DC Converter datasheet (Rev. A) Apr. 04, 2013
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) Apr. 19, 2016
Application note Working With Boost Converters Jun. 15, 2015
Application note Basic Calculation of a Boost Converter's Power Stage (Rev. C) Jan. 08, 2014
User guide AN-2281 LMR61428 Evaluation Module (Rev. A) Apr. 26, 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) Apr. 24, 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) Apr. 23, 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 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 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 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-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 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 03, 2004
Application note Understanding Boost Power Stages In Switchmode Power Supplies Mar. 04, 1999

Design & development

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

Hardware development

EVALUATION BOARD Download
20
Description
Introduction The LMR61428 evaluation module is designed to provide the power supply design engineer with a fully functional regulator design. The evaluation module takes the input from a single Li-Ion battery and boosts the voltage up to 5V at a constant load capability of 500mA. The switching (...)
Features
  • One cell Li-Ion battery for Input Voltage
  • 5V Output Voltage at 500mA Output Current
  • Switching Frequency of 1.2 MHz
  • Small Solution Size: 2.287 X 1.058 inches (58.09 X 26.87 mm)

Design tools & simulation

SIMULATION MODEL Download
SNVM050A.ZIP (66 KB) - PSpice Model
SIMULATION MODEL Download
SNVM649.ZIP (62 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNVM650.ZIP (16 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SNVM947.ZIP (3 KB) - PSpice Model
SIMULATION TOOL 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
Tiny SEPIC for Low Input Voltage Reference Design
PMP30296 — 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.
document-generic Schematic

CAD/CAE symbols

Package Pins Download
VSSOP (DGK) 8 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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