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LM46002

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

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

LM46002

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Data sheet Order now

Product details

Parameters

Vin (Min) (V) 3.5 Vin (Max) (V) 60 Vout (Min) (V) 1 Vout (Max) (V) 28 Iout (Max) (A) 2 Regulated outputs (#) 1 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 Control mode Current Mode Duty cycle (Max) (%) 99 Type Converter Operating temperature range (C) -40 to 125 Rating Catalog 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
Selection guides SIMPLE SWITCHER Overview Brochure (Rev. B) Mar. 18, 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
Selection guides Wide VIN power solutions for industrial automation brochure (Rev. A) Mar. 06, 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
View details

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

REFERENCE DESIGNS Download
12W Negative Output Bias Supply Reference Design
PMP20999 — PMP20999 is a synchronous inverting buck-boost converter reference design using the LM46002 Synchronous buck regulator IC. The design accepts an input voltage of 15Vin to 30Vin and provides an output of -12Vout capable of supplying 1A of continuous current to the load. This design was built on the (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
EMI/EMC Compliant Industrial Temp Dual Port Gigabit Ethernet PHY Reference Design
TIDA-00204 — This design allows for performance evaluation of two industrial grade DP83867IR Gigabit Ethernet PHYs and Sitara™ host processors with integrated Ethernet MAC and Switch. It was developed to meet industrial requirements for EMI and EMC. The application firmware implements a driver for the PHY (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Positive/Negative 15V Output Supply Using Wide Vin Synchronous Buck Regulator Reference Design
PMP9379 — PMP9379 reference design is a positive and negative 15V output supply capable of delivering 0.5A per rail using the LM46002. The input voltage range is 18V to 42V in. PMP9379 uses external circuitry to ensure that the +/-15V output track each other, i.e. the output voltage above and below 0V are (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
CISPR 25 Class 5 Rated 6.6W Automotive Power Reference Design
PMP9398 — The PMP9398 reference design is a conducted EMI optimized 6.6W power supply design for automotive application. It features the SIMPLE SWITCHER® LM46002 synchronous buck regulator and provides a 3.3V, max 2A output. The input voltage range is 4.5V to 60V suitable for 12V automotive battery (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Wide Vin Buck Converter in TO-220 Packaging - Reference Design
PMP9450 — PMP9450 is a reference design that is done so that the LM46002 can be evaluated in designs that use the LM2592HV.  The board is pin and function compliant with the LM2592HV in TO-220.  The design methodology was such that all external components used on the LM2592HV board were kept the (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Pb Battery Charger w/Charging Algorithm Using SIMPLE SWITCHER DC/DC Converter Reference Design
PMP9456 — The reference design provides a battery charging solution for a 6V, 4.7AH Lead Acid battery with a simple charging algorithm implemented using the DC/DC Buck converter LM46001. Such batteries are widely used in industrial and consumer applications such as digital weigh scales. The design is done for (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
PMP9387 is designed for power supply of cellphone screen using OLED panel
PMP9387 — Synchronous Buck Converter by LM46002, with input voltage of 24V and wide Vout from 2V to 19V by weighted voltage control of an external dac voltage, at maximum load 1A, with highest efficiency 96%. Voltage regulation is less than 2% when load is larger than 20%.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
15V to 60V Wide Input Four-Output SIMPLE SWITCHER® Reference Design Using LM46002 and LMZ21701
PMP10618 — This reference design demonstrates the wide input voltage capability and small solution size of the LM46002 SIMPLE SWITCHER® Synchronous Buck Converter and the LMZ21701 SIMPLE SWITCHER® Nano Module. The LM46002 provides a regulated 12V rail from an input of 15V to 60V. The 12V rail is then (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
24V Input 700mA Output Buck Regulator LED Driver - Reference Design
PMP10596 — The PMP10596 reference design is an LED driver based on SIMPLE SWITCHER® LM46002 buck regulator. The driver board takes 24V +/-25% input voltage and supplies700mA output current to drive up to 4 LEDs in series. The LM46002 is a 60V, 2A synchronous buck regulator with integrated FETs, and in this (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Synchronous Inverting Buck Converter Application - Reference Design
PMP9380 — PMP9380 reference design is a Synchronous Inverting Buck Converter using the LM46002 Synchronous Buck Regulator IC. The design accepts an input voltage of 18Vin to 42Vin and provides an output of -15V capable of supplying a maximum current of 0.5A to the load.  This design was built on a (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
CISPR 25 Class 5 Rated Multi-Output Power Supply for Automotive Cluster in Infotainment System
PMP9487 — PMP9487 is a conducted EMI optimized (CISPR 25) 8W SEPIC converter for wide range Vin automotive infotainment cluster applications using the LM5001 regulator IC (used as SEPIC), LM46002 (used as buck) and LM2831Y regulator IC (used as buck).  The design accepts an input voltage of 6.5Vin to (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
CISPR 22 Class-B Compliant Synchronous Wide Vin Buck Converter Reference Design
PMP9457 — This CISPR 22 Class-B compliant reference design features LM46002 in a 75x86mm board size. The synchronous buck regulator, LM46002, is used to generate 3.3V. The input voltage range is 4.5V to 45V and is suitable for 24V industrial supply.
document-generic Schematic document-generic User guide

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HTSSOP (PWP) 16 View options

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Videos

Optimizing Automotive DC/DC Converter Designs for EMI and Thermals

A thorough discussion around optimizing automotive DC/DC buck regulators for EMI and thermal performance

Posted: 08-Jan-2017
Duration: 45:16

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