Available in fixed and adjustable output voltages ranging from 1.0V to 3.3V
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 (typ)
SOT23-5 package
Current overload protection and Thermal shutdown protection
Description
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 2.7V to 5.5V. It provides up to 600mA 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 PWM mode, the device operates at a fixed-frequency of 2 MHz (typ). 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 (typ).
The LM3674 is available in SOT23-5 in leaded (PB) and lead-free (NO PB) versions. A high switching frequency of 2 MHz (typ) allows use of only three tiny external surface-mount components, an inductor and two ceramic capacitors.
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 from 2.7V to 5.5V. It provides up to 600mA load current, over the entire input voltage range. There are several fixed output voltages and adjustable output voltage versions. This device offers superior features and performance for mobile phones and similar portable systems. During PWM mode, the device operates at a fixed-frequency of 2 MHz (typ). Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 microA (typ).
Features:
600mA max load current
Input voltage range from 2.7V to 5.5V
Available in fixed and adjustable output voltages ranging from 1.0V to 3.3V
Operates from a single Li-Ion cell Battery
Internal synchronous rectification for high efficiency
Internal soft start
0.01 microA typical shutdown current
2 MHz PWM fixed switching frequency (typ)
SOT23-5 package
Current overload protection and Thermal shutdown protection
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 from 2.7V to 5.5V. It provides up to 600mA load current, over the entire input voltage range. There are several fixed output voltages and adjustable output voltage versions. This device offers superior features and performance for mobile phones and similar portable systems. During PWM mode, the device operates at a fixed-frequency of 2 MHz (typ). Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 microA (typ).
Features:
600mA max load current
Input voltage range from 2.7V to 5.5V
Available in fixed and adjustable output voltages ranging from 1.0V to 3.3V
Operates from a single Li-Ion cell Battery
Internal synchronous rectification for high efficiency
Internal soft start
0.01 microA typical shutdown current
2 MHz PWM fixed switching frequency (typ)
SOT23-5 package
Current overload protection and Thermal shutdown protection
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 from 2.7V to 5.5V. It provides up to 600mA load current, over the entire input voltage range. There are several fixed output voltages and adjustable output voltage versions. This device offers superior features and performance for mobile phones and similar portable systems. During PWM mode, the device operates at a fixed-frequency of 2 MHz (typ). Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 microA (typ).
LM3674 Features:
600mA max load current
Input voltage range from 2.7V to 5.5V
Available in fixed and adjustable output voltages ranging from 1.0V to 3.3V
Operates from a single Li-Ion cell Battery
Internal synchronous rectification for high efficiency
Internal soft start
0.01 microA typical shutdown current
2 MHz PWM fixed switching frequency (typ)
SOT23-5 package
Current overload protection and Thermal shutdown protection
LM3674 Applications
Mobile phones
PDAs
MP3 players
Portable instruments
W-LAN
Digital still Cameras
Portable Hard disk drives
National Semiconductor follows the provisions of the Product Stewardship Guide for Customers
(CSP-9-111C1)
and Banned Substances and Materials of Interest Specification
(CSP-9-111S2)
for regulatory environmental compliance. Details may be found at:
www.national.com/en/packaging/greennopb.html.
Lead free products are RoHS compliant.
Lead Free product status is available through the search tool located
here
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
LM3670
