LM46002

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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) (mA) 0.027 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

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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 guides 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 notes Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) Mar. 12, 2019
Application notes Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems Sep. 10, 2018
Application notes Differences Between LM4600x/LM4360x A and Non-A OPNs Mar. 27, 2018
White papers Synchronous Rectification in High-Performance Power Converter Design (Rev. A) Sep. 15, 2016
Application notes 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 notes 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 notes Thermal Design Made Simple With LM43603 and LM46002 Sep. 15, 2014
Application notes Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) Sep. 12, 2014
Application notes Compensation Made SIMPLE With LM4360x, LM4600x Jul. 29, 2014
User guides LM46002 EVM User Guide Aug. 08, 2013
Application notes AN-1533 Overvoltage Protection Circuit for Automotive Load Dump (Rev. B) May 06, 2013
Application notes AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) May 06, 2013
Application notes AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) Apr. 24, 2013
Application notes AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) Apr. 23, 2013
Application notes AN-1197 Selecting Inductors for Buck Converters (Rev. B) Apr. 23, 2013
Application notes AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) Apr. 23, 2013
Application notes AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) Apr. 23, 2013
Application notes AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) Apr. 23, 2013
Application notes AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) Apr. 23, 2013
Application notes AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) Apr. 23, 2013
Application notes AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) Apr. 23, 2013
Application notes Understanding and Applying Current-Mode Control Theory Aug. 19, 2007
Application notes Input and Output Capacitor Selection Sep. 19, 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations Jul. 12, 2005
Application notes AN-643 EMI/RFI Board Design (Rev. B) May 03, 2004

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

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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