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Product details

Parameters

Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Vout (Min) (V) 1.1 Vout (Max) (V) 3.3 Iout (Max) (A) 0.6 Iq (Typ) (mA) 0.016 Iq (Typ) (uA) 16 Switching frequency (Min) (kHz) 1600 Switching frequency (Max) (kHz) 2600 Features Enable, Light Load Efficiency, Synchronous Rectification Operating temperature range (C) -40 to 85 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

DSBGA (YZR) 5 2 mm² 1.092 x 1.422 DSBGA (YZR) 5 2 mm² 1.422 x 1.092 SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 USON (NKH) 6 4 mm² 2 x 2 open-in-new Find other Buck converters (integrated switch)

Features

  • LM3671-Q1 is Qualified for Automotive Applications
  • AEC Q100-Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
  • 16-µA Typical Quiescent Current
  • 600-mA Maximum Load Capability
  • 2-MHz PWM Fixed Switching Frequency (Typical)
  • Automatic PFM-PWM Mode Switching
  • Internal Synchronous Rectification for High Efficiency
  • Internal Soft Start
  • 0.01-µA Typical Shutdown Current
  • Operates from a Single Li-Ion Cell Battery
  • Only Three Tiny Surface-Mount External Components Required (One Inductor, Two Ceramic Capacitors)
  • Current Overload and Thermal Shutdown Protection
  • Available in Fixed Output Voltages and Adjustable Version
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Description

The LM3671 step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.7 V to 5.5 V. It provides up to 600-mA load current, over the entire input voltage range. There are several different fixed voltage output options available as well as an adjustable output voltage version range from 1.1 V to 3.3 V.

The device offers superior features and performance for mobile phones and similar portable systems. Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved system control. During PWM mode, the device operates at a fixed-frequency of 2 MHz (typical). Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typical) during light load and standby operation. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typical).

A high-switching frequency of 2 MHz (typical) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor, and two ceramic capacitors, are required.

For all available packages, see the orderable addendum at the end of the datasheet.
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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 9
Type Title Date
* Datasheet LM3671/-Q1 2-MHz, 600-mA Step-Down DC-DC Converter datasheet (Rev. S) May 12, 2016
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application notes A Topical Index of TI Low Power Buck DC/DC Application Notes Jan. 17, 2018
Technical articles When to select an integrated inductor DC/DC module over a linear regulator May 16, 2016
Application notes Analog Applications Journal 3Q 2015 Jul. 24, 2015
Application notes Transient-testing platforms and automation techniques for LDOs and buck regulato Jul. 24, 2015
User guides AN-1395 LM3671 Evaluation Board (Rev. F) Apr. 30, 2013
Application notes Power Management Design for Applications Processors Mar. 22, 2007

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
Description

The LM3671 evaluation board is a working demonstration of a step down DC-DC converter. The application note contains information about the evaluation board. The LM3671 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd (...)

Features
  • 16 microA typical quiescent current
  • 600 mA maximum load capability
  • 2 MHz PWM fixed switching frequency (typ)
  • Automatic PFM/PWM mode switching
  • Available in fixed output voltages as well as an adjustable version
  • SOT23-5 package
  • Internal synchronous rectification for high efficiency
  • Internal soft start
  • 0.01 (...)
EVALUATION BOARDS Download
document-generic User guide
49
Description

The LM3671 evaluation board is a working demonstration of a step down DC-DC converter. The application note contains information about the evaluation board. The LM3671 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd (...)

Features
  • 16 microA typical quiescent current
  • 600 mA maximum load capability
  • 2 MHz PWM fixed switching frequency (typ)
  • Automatic PFM/PWM mode switching
  • Available in fixed output voltages as well as an adjustable version
  • SOT23-5 package
  • Internal synchronous rectification for high efficiency
  • Internal soft start
  • 0.01 (...)
EVALUATION BOARDS Download
document-generic User guide
49
Description

The LM3671 evaluation board is a working demonstration of a step down DC-DC converter. The application note contains information about the evaluation board. The LM3671 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd (...)

Features
  • 16 microA typical quiescent current
  • 600 mA maximum load capability
  • 2 MHz PWM fixed switching frequency (typ)
  • Automatic PFM/PWM mode switching
  • Available in fixed output voltages as well as an adjustable version
  • SOT23-5 package
  • Internal synchronous rectification for high efficiency
  • Internal soft start
  • 0.01 (...)

Design tools & simulation

SIMULATION MODELS Download
SNVM065.TSC (121 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVM066.ZIP (10 KB) - TINA-TI Spice Model
SIMULATION TOOLS 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
Uncompressed Digital Video SerDes over Coax for Automotive Mega Pixel CMOS Camera Reference Design
TIDA-00133 The TIDA-00133 reference design is a high speed serial video interface to connect a remote automotive camera module to a display or machine vision processing system. It uses TIs FPD-Link III SerDes technology to transmit uncompressed MegaPixel video data, bidirectional control signals and power (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
DSBGA (YZR) 5 View options
SOT-23 (DBV) 5 View options
USON (NKH) 6 View options

Ordering & quality

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