R1800 Series
144 nA Low Quiescent Current Buck DC/DC Converter for Energy Harvester

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  • Description

    R1800 is a power-storing buck DC/DC converter for a photovoltaic and vibration energy harvester. 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 operating quiescent current (IQ 144nA) and a high efficiency (approximately 90%@10 µA).
    • A Control function that enables a maximum power optimizes a power supply from an energy harvester.

  • Spec
    Input Voltage Range 2.0 V to 5.5 V (6.5 V)
    Operating Temperature Range -40°C to 85°C (125°C)
    Operating Quiescent Current Typ.144 nA (Ta = 25°C, at no load)
    Output Voltage Range 2.0 V to 4.5 V (0.1 V step)
    Output Voltage Accuracy ±3% (Ta = 25°C)
    Package DFN(PL)2730-12
    Starting Power 720 nW
    Accuracy of Maximum Power Voltage 200 mV

    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

      L: 22 µH, CIN : 10 µF, COUT : 47 µF

    • Efficiency vs. Output Current VSET = 3.3 V

      Efficiency vs. Output Current VSET = 3.3 V

    • 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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