2MHz, 600mA Step-Down DC-DC Converter
Product details
Parameters
Package | Pins | Size
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
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.Technical documentation
| 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
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 (...)
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 (...)
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
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
Design files
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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