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LM3678

ACTIVE

High-Performance, Miniature 1.5A Step-Down DC-DC Converter for Handheld Applications

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Data sheet

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TPS62825 ACTIVE 2.4-V to 5.5-V input, 2-A step-down converter with 1% accuracy in 1.5-mm x 1.5-mm QFN Smaller solution size with higher output voltage range 0.6 V to 4 V

LM3678

ACTIVE
Data sheet Order now

Product details

Iout (max) (A) 1.5 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Type Converter Switching frequency (min) (kHz) 2700 Switching frequency (max) (kHz) 3600 Features Adaptive/Dynamic Voltage Scaling, Enable, Power good, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 0.8 Vout (max) (V) 1.2 Rating Catalog Operating temperature range (°C) -30 to 85
Iout (max) (A) 1.5 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Type Converter Switching frequency (min) (kHz) 2700 Switching frequency (max) (kHz) 3600 Features Adaptive/Dynamic Voltage Scaling, Enable, Power good, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 0.8 Vout (max) (V) 1.2 Rating Catalog Operating temperature range (°C) -30 to 85
WSON (DSC) 10 9 mm² 3 x 3
  • VOUT = 0.8 V or 1.2 V
  • VIN = 2.5 V to 5.5 V
  • 1.5-A Maximum Load Capability
  • 3.3-MHz (Typical) PWM Fixed Switching Frequency Allows Use of 1-µH Inductor
  • ±3% DC Output Voltage Precision
  • 0.01-µA (Typical) Shutdown Current
  • Internal Synchronous Rectification for High Efficiency
  • Internal Soft Start
  • Current Overload and Thermal Shutdown Protection

All trademarks are the property of their respective owners.

  • VOUT = 0.8 V or 1.2 V
  • VIN = 2.5 V to 5.5 V
  • 1.5-A Maximum Load Capability
  • 3.3-MHz (Typical) PWM Fixed Switching Frequency Allows Use of 1-µH Inductor
  • ±3% DC Output Voltage Precision
  • 0.01-µA (Typical) Shutdown Current
  • Internal Synchronous Rectification for High Efficiency
  • Internal Soft Start
  • Current Overload and Thermal Shutdown Protection

All trademarks are the property of their respective owners.

The LM3678 step-down DC-DC converter is optimized for powering low-voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.5 V to 5.5 V. It provides up to 1.5-A load current, over the entire input voltage range. LM3678 offers a 0.8V or 1.2V option. One of the pair of voltages is set through the VSELECT pin.

LM3678 operates in PWM mode with a fixed frequency of 3.3 MHz. 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).

The LM3678 is available in a 3mm x 3mm DSC-10 package. A high switching frequency of 3.3 MHz (typical) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required (solution size less than 33 mm2). For voltages other than the voltage shown, contact TI or your distributor.

The LM3678 step-down DC-DC converter is optimized for powering low-voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.5 V to 5.5 V. It provides up to 1.5-A load current, over the entire input voltage range. LM3678 offers a 0.8V or 1.2V option. One of the pair of voltages is set through the VSELECT pin.

LM3678 operates in PWM mode with a fixed frequency of 3.3 MHz. 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).

The LM3678 is available in a 3mm x 3mm DSC-10 package. A high switching frequency of 3.3 MHz (typical) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required (solution size less than 33 mm2). For voltages other than the voltage shown, contact TI or your distributor.
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Type Title Date
* Data sheet H-Perform, Mini 1.5-A Step-Dwn DC-DC Cnvrtr for Handheld Apps datasheet (Rev. C) 02 May 2013
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
EVM User's guide AN-1722 LM3678 Evaluation Board (Rev. B) 30 Apr 2013

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