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
•
SOT23-5, 5-bump micro SMD and 6-pin LLP packages
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 2.7V to 5.5V. It provides up to 600mA 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 1.1V to
3.3V.
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 (typ.). Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16
µA (typ.) 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 (typ.).
The LM3671 is available in SOT23-5, tiny 5-bump micro SMD and a 6-pin LLP packages in leaded (PB) and lead-free (NO PB) versions.
A high switching frequency of 2 MHz (typ.) allows use of tiny surface-mount components. Only three external surface-mount
components, an inductor and two ceramic capacitors, are required.
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 batteries. It provides up to 600 mA load current, over an input voltage range from 2.8V to 5.5V. There are several different fixed voltage output options available as well as an adjustable output voltage version. This device offers superior features and performance for mobile phones and similar portable applications with complex power management systems.
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 microA typical shutdown current
Operates from a single Li-Ion cell or 3 cell NiMH/NiCd batteries
Only three tiny surface-mount external components required (one inductor, two ceramic capaitors)
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 batteries. It provides up to 600 mA load current, over an input voltage range from 2.8V to 5.5V. There are several different fixed voltage output options available as well as an adjustable output voltage version. This device offers superior features and performance for mobile phones and similar portable applications with complex power management systems.
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 microA typical shutdown current
Operates from a single Li-Ion cell or 3 cell NiMH/NiCd batteries
Only three tiny surface-mount external components required (one inductor, two ceramic capaitors)
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 batteries. It provides up to 600 mA load current, over an input voltage range from 2.8V to 5.5V. There are several different fixed voltage output options available as well as an adjustable output voltage version. This device offers superior features and performance for mobile phones and similar portable applications with complex power management systems.
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 microA typical shutdown current
Operates from a single Li-Ion cell or 3 cell NiMH/NiCd batteries
Only three tiny surface-mount external components required (one inductor, two ceramic capaitors)
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 batteries. It provides up to 600 mA load current, over an input voltage range from 2.8V to 5.5V. There are several different fixed voltage output options available as well as an adjustable output voltage version. This device offers superior features and performance for mobile phones and similar portable applications with complex power management systems.
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 microA typical shutdown current
Operates from a single Li-Ion cell or 3 cell NiMH/NiCd batteries
Only three tiny surface-mount external components required (one inductor, two ceramic capaitors)
The LM3671 step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion 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 different fixed voltage output options available as well as an adjustable output voltage version range from 1.1V to 3.3V.
The LM3677 evaluation board is a working demonstration of a step down DC-DC converter. This application note contains information about the evaluation board. For further information on buck converter topology, device electrical characteristics, and component selection, please refer to the datasheet.
Features:
16 µ A typical quiescent current
600mA maximum load capability
2 MHz PWM fixed switching frequency (typ)
Automatic PFM/WM 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
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.
LM3671
LM2651
