LM46002

ACTIVE

3.5V to 60V, 2A Synchronous Step-Down Voltage Converter

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Product details

Parameters

Vin (Min) (V) 3.5 Vin (Max) (V) 60 Vout (Min) (V) 1 Vout (Max) (V) 28 Iout (Max) (A) 2 Iq (Typ) (uA) 27 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2200 Features Enable, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 16 32 mm² 5 x 6.4 open-in-new Find other Buck converters (integrated switch)

Features

  • 27-µA Quiescent current in regulation
  • High efficiency at light load (DCM and PFM)
  • Meets EN55022/CISPR 22 EMI standards
  • Integrated synchronous rectification
  • Adjustable frequency range: 200 kHz to 2.2 MHz (500 kHz default)
  • Frequency synchronization to external clock
  • Internal compensation
  • Stable with almost any combination of ceramic, polymer, tantalum, and aluminum capacitors
  • Power-good flag
  • Soft start into prebiased load
  • Internal soft start: 4.1 ms
  • Extendable soft-start time by external capacitor
  • Output voltage tracking capability
  • Precision enable to program system UVLO
  • Output short-circuit protection with hiccup mode
  • Overtemperature thermal shutdown protection
  • Create a custom design using the LM46002 with the WEBENCH® Power Designer

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Description

The LM46002 regulator is an easy-to-use synchronous step-down DC/DC converter capable of driving up to 2 A of load current from an input voltage ranging from 3.5 V to 60 V. The LM46002 provides exceptional efficiency, output accuracy and drop-out voltage in a very small solution size. An extended family is available in various load current options and 36-V maximum input voltage in pin-to-pin compatible packages, including LM46001, LM46000, LM43603, LM43602, LM43601 and LM43600. Peak-current-mode control is employed to achieve simple control-loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, power-good flag, precision enable, internal soft start, extendable soft start, and tracking provide a flexible and easy-to-use platform for a wide range of applications. Discontinuous conduction and automatic frequency reduction at light loads improve light load efficiency. The family requires few external components. Pin arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, VCC undervoltage lockout, cycle-by-cycle current limit, and output short-circuit protection. The LM46002 device is available in the 16-lead HTSSOP / PWP package (6.6 mm × 5.1 mm × 1.2 mm) with 0.65-mm lead pitch.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LM46002 3.5-V to 60-V, 2-A Synchronous Step-Down Voltage Converter datasheet (Rev. C) Apr. 05, 2019
Selection guide Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) Mar. 12, 2019
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems Sep. 10, 2018
Application note Differences Between LM4600x/LM4360x A and Non-A OPNs Mar. 27, 2018
White paper Synchronous Rectification in High-Performance Power Converter Design (Rev. A) Sep. 15, 2016
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) Apr. 19, 2016
More literature SIMPLE SWITCHER Synchronous Regulator Series (Rev. B) Feb. 08, 2016
Technical articles Inverting made simple by unleashing the buck May 19, 2015
Application note Inverting Applications Made SIMPLE With LM4600x and LM4360x (Rev. B) Feb. 20, 2015
Technical articles The MOSFET always rings twice – designing with synchronous converters Oct. 18, 2014
Technical articles Uncover the Bonus Components in Your Buck Converter Schematic Oct. 11, 2014
Application note Thermal Design Made Simple With LM43603 and LM46002 Sep. 15, 2014
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) Sep. 12, 2014
Application note Compensation Made SIMPLE With LM4360x, LM4600x Jul. 29, 2014
User guide LM46002 EVM User Guide Aug. 08, 2013
Application note AN-1533 Overvoltage Protection Circuit for Automotive Load Dump (Rev. B) May 06, 2013
Application note AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) May 06, 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-1197 Selecting Inductors for Buck Converters (Rev. B) Apr. 23, 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) Apr. 23, 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (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 Understanding and Applying Current-Mode Control Theory Aug. 19, 2007
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

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
29
Description

The Texas Instruments LM46002PWPEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM46002PWP, A 60V Synchronous Step-Down Converter. The EVM operates from a 3.5V to 60V input and provides a 5V output at 2A.

Features
  • High efficiency at light load
  • Synchronous rectification
  • Frequency synchronization
  • Wide VIN range

Design tools & simulation

SIMULATION MODEL Download
SNVM576.ZIP (88 KB) - PSpice Model
SIMULATION MODEL Download
SNVM583C.ZIP (473 KB) - PSpice Model
SIMULATION MODEL Download
SNVM606.TSC (87 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNVM610.ZIP (52 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SNVM729B.ZIP (7 KB) - PSpice Model
SIMULATION MODEL Download
SNVM730.ZIP (1 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

Many TI reference designs include the LM46002 Use our reference design selection tool to review and identify designs that best match your application and parameters.

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 16 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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