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LM76003

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

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

LM76003

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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) 57 Iout (Max) (A) 3.5 Iq (Typ) (mA) 0.015 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 2200 Features Enable, Forced PWM, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, Wettable Flanks Package Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

WQFN (RNP) 30 24 mm² 6 x 4 open-in-new Find other Buck converters (integrated switch)

Features

  • Integrated synchronous rectification
  • Input voltage 3.5 V to 60 V (65 V maximum)
  • Output current:
    • LM76002: 2.5 A
    • LM76003: 3.5 A
  • Output voltage 1 V to 95% VIN
  • 15-µA Quiescent current in regulation
  • Wide voltage conversion range
    • tON-MIN = 65 ns (typical)
    • tOFF-MIN = 95 ns (typical)
  • System-level features
    • Synchronization to external clock
    • Power-good flag
    • Precision enable
    • Adjustable soft-start (6.3 ms default)
    • Voltage tracking capability
  • Pin-selectable FPWM operation
  • Adjustable frequency range: 300 kHz to 2.2 MHz
  • High-efficiency at light-load architecture (PFM)
  • Protection features
    • Cycle-by-cycle current limit
    • Short-circuit protection with hiccup mode
    • Overtemperature thermal shutdown protection
  • Create a custom design using the LM76002/LM76003 with the WEBENCH® Power Designer

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Description

The LM76002/LM76003 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 2.5 A (LM76002) or 3.5 A (LM76003) of load current from an input up to 60 V. The LM76002/LM76003 provides exceptional efficiency and output accuracy in a very small solution size. Peak current-mode control is employed. Additional features such as adjustable switching frequency, synchronization, FPWM option, power-good flag, precision enable, adjustable soft start, and tracking provide both flexible and easy-to-use solutions for a wide range of applications. Automatic frequency foldback at light load and optional external bias improve efficiency. This device requires few external components and has a pinout designed for simple PCB layout with best-in-class EMI (CISPR22) and thermal performance. Protection features include input undervoltage lockout, thermal shutdown, cycle-by-cycle current limit, and short-circuit protection. The LM76002/LM76003 device is available in the WQFN 30-pin leadless package with wettable flanks.

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Technical documentation

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Type Title Date
* Datasheet LM76002/LM76003 3.5-V to 60-V, 2.5-A/3.5-A Synchronous Step-Down Voltage Regulator datasheet (Rev. A) Sep. 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
Technical articles Top three qualities to consider when designing a video doorbell power supply Sep. 24, 2018
Application notes Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems Sep. 10, 2018
Technical articles Effects of IC package on EMI performance May 22, 2018

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
$49.00
Description
The LM76003EVM-500K evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM76003 synchronous step-down converter. The EVM operates from an 3.5V to 60V input and provides a 3.3V or 5V output at 3.5A.
Features
  • High Efficiency at light load
  • Synchronous Rectification
  • Internal Compensation
  • Frequency Synchronization
  • Auto Mode or FPWM mode
View details

Design tools & simulation

SIMULATION MODELS Download
SNVMBE9A.ZIP (297 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBF3A.ZIP (9 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBL7.ZIP (4 KB) - TINA-TI Reference Design
GERBER FILES Download
SNVC227.ZIP (40 KB)

Reference designs

REFERENCE DESIGNS Download
Three-level, three-phase SiC AC-to-DC converter reference design
TIDA-010039 — This reference design provides an overview on how to implement a three-level, three-phase, SiC-based AC/DC converter with bi-directional functionality. A high switching frequency of 50 kHz reduces the size of magnetics for the filter design and as a result a higher power density. SiC MOSFETs with (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Daisy-chained power and data over single pair Ethernet (T1) reference design
TIDA-010076 — This reference design shows the transfer of 220-W power and 100-Mbit/s data over SPE. Communication systems in daisy-chain topology need significantly less hardware and wiring than conventional systems in star-topology. When combined with single-pair Ethernet (SPE, 100BASE-T1) and power over data (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
10kW 3-Phase 3-Level Grid Tie Inverter Reference Design for Solar String Inverter
TIDA-01606 — This verified reference design provides an overview on how to implement a three-level three-phase SiC based DC:AC grid-tie inverter stage.Higher switching frequency of 50KHz reduces the size of magnetics for the filter design and enables higher power density. The use of SiC MOSFETs with switching (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Non-isolated power architecture with diagnostics reference design for protection relay modules
TIDA-010055 — This reference design showcases non-isolated power supply architectures for protection relays with analog input/output and communication modules generated from 5-, 12-, or 24-V DC input. To generate the power supplies the design uses DC/DC converters with an integrated FET, a power module with an (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Inverting Buck-Boost Converter With Variable Output Voltage Reference Design
PMP15026 — This reference design uses the 60V, 3.5A LM76003 synchronous buck converter in an inverting buck-boost configuration to generate a variable negative output voltage. Dynamic variation of the output voltage allows use in applications requiring different output voltages without having to make component (...)
document-generic Schematic document-generic User guide

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Package Pins Download
WQFN (RNP) 30 View options

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