Home Power management DC/DC switching regulators Step-down (buck) regulators Buck converters (integrated switch)

LM3674

ACTIVE

2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5

Product details

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) 0.3 Switching frequency (min) (kHz) 1600 Switching frequency (max) (kHz) 2600 Features Enable, Synchronous Rectification Operating temperature range (°C) -30 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 100 Type Converter
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) 0.3 Switching frequency (min) (kHz) 1600 Switching frequency (max) (kHz) 2600 Features Enable, Synchronous Rectification Operating temperature range (°C) -30 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 100 Type Converter
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Input Voltage Range From 2.7 V to 5.5 V
  • 600-mA Maximum Load Current
  • Available in Fixed and Adjustable Output Voltages
    Ranging From 1 V to 3.3 V
  • Operates From a Single Li-Ion Cell Battery
  • Internal Synchronous Rectification for High
    Efficiency
  • Internal Soft-Start
  • 0.01-µA Typical Shutdown Current
  • 2-MHz PWM Fixed Switching Frequency (typical)
  • Current Overload Protection and Thermal
    Shutdown Protection
  • Input Voltage Range From 2.7 V to 5.5 V
  • 600-mA Maximum Load Current
  • Available in Fixed and Adjustable Output Voltages
    Ranging From 1 V to 3.3 V
  • Operates From a Single Li-Ion Cell Battery
  • Internal Synchronous Rectification for High
    Efficiency
  • Internal Soft-Start
  • 0.01-µA Typical Shutdown Current
  • 2-MHz PWM Fixed Switching Frequency (typical)
  • Current Overload Protection and Thermal
    Shutdown Protection

The LM3674 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 fixed output voltages and adjustable output voltage versions.

The device offers superior features and performance for mobile phones and similar portable systems. During the Pulse Width Modulation (PWM) mode, the device operates at a fixed-frequency of 2 MHz (typical). Internal synchronous rectification provides high efficiency during the PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typical).

The LM3674 is available in a 5-pin SOT-23 package. A high switching frequency of 2 MHz (typical) allows use of only three tiny external surface-mount components, an inductor and two ceramic capacitors.

The LM3674 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 fixed output voltages and adjustable output voltage versions.

The device offers superior features and performance for mobile phones and similar portable systems. During the Pulse Width Modulation (PWM) mode, the device operates at a fixed-frequency of 2 MHz (typical). Internal synchronous rectification provides high efficiency during the PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typical).

The LM3674 is available in a 5-pin SOT-23 package. A high switching frequency of 2 MHz (typical) allows use of only three tiny external surface-mount components, an inductor and two ceramic capacitors.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Similar functionality to the compared device
TPS62230 ACTIVE 2 MHz Ultra Small Step Down Converter with DCS-Control in 1x1.5 SON Package Simple DC/DC converter with fast transient response at <12-mm² total BOM size.
TPS62671 ACTIVE 500-mA, 6-MHz High-Efficiency Step-Down Converter, Vout=1.8V Simple low-noise DC/DC converter in CSP at <12-mm² total BOM size.
TPS82671 ACTIVE 600mA Fully Integrated, Low Noise Step-Down Converter Module in MicroSiP™ Package Module with smaller BOM size and integrated inductor, input and output capacitors.

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 4
Type Title Date
* Data sheet LM3674 2-MHz, 600-mA Step-Down DC-DC Converter in SOT-23 datasheet (Rev. G) PDF | HTML 24 Apr 2015
Application note Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 23 May 2022
Design guide 2-Port USB 3.0 Hub (TIDA-00287) 01 Aug 2014
EVM User's guide AN-1427 LM3674 Evaluation Board (Rev. K) 30 Apr 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM3674MF-1.8EV — 2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5

The LM3674 evaluation board is a working demonstration of a step down DC-DC converter. The application note contains information about the evaluation board. The LM3674 step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion cell battery and input voltage rails (...)

User guide: PDF
Not available on TI.com
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Reference designs

TIDA-00287 — 2-Port USB 3.0 hub reference design

This verified reference design is a two-port, USB 3.0 compliant hub.  It provides simultaneous SuperSpeed and high-speed/full-speed connections on the upstream port and provides SuperSpeed, high-speed, full-speed, or low-speed connections on the downstream ports.

The hub design provides power (...)

Design guide: PDF
Schematic: PDF
Package Pins Download
SOT-23 (DBV) 5 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos