R1801 Series
Buck DC/DC Converter for Energy Harvester with Adjustable Maximum Power Point Control, Adjustable Output Voltage and PG Function

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  • Description

    R1801 is a power-storing buck DC/DC converter for a photovoltaic and vibration energy harvester. The Power Good (PG) function can output PG signal according to the output voltage facilitating to build a system.
    A low operating quiescent current allows a harvester to be used under a low-illumination environment, and it is suitable for an equipment with low power supplied from a harvester.

    Key Benefits

    • Providing a low power supply (IQ 200 nA) and a high efficiency (approximately 80%@10 µA).
    • Monitoring the output voltage to output Power Good (PG) signal.
    • Adjustable the output voltage and maximum power point control voltage in 100 mV step by the setting pins.

  • Spec
    Input Voltage Range 2.3 V to 5.5 V (6.5 V)
    Operating Temperature Range -40°C to 85°C (125°C)
    Operating Quiescent Current Typ. 200 nA (Ta = 25°C, at no load)
    Output Voltage Range 2.3 V to 4.5 V
    Output Voltage Accuracy ±3% (Ta = 25°C)
    Package DFN(PL)2730-12
    Starting Power 1 µW
    Functions Adjustable Maximum Power Point Control, Adjustable Output Voltage

    Protections / Functions

    TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust
  • Technical
    • Typical Application

      Typical Application
    • Efficiency vs. Output Current

      Efficiency vs. Output Current

    • Related Links

      • Prime Designer

        Online Design Tool

        Registration to myNISD is required to use some of the functions, such as simulations.

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  • Quality &
    • Refer to the datasheets for the details on the product.
    • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

Download Datasheet

Functional Description

TSD Thermal Shutdown Function
ILX LX Current Limit Function
OCP Overcurrent Protection
OVP Overvoltage Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Reverse Reverse Current Protection Circuit
Shutdown Shutdown Function
Soft Start Soft Start Function
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Function
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty Maximum Duty Cycle
Ext. Phase Externally Adjustable Phase Compensation
LED Adjust LED High-speed Dimming Control

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