RP515 Series
Low Power Consumption 300mA Buck DC/DC Converter with Battery Monitor

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  • Description

    The RP515 is a buck DC/DC converter with a Battery Monitor (BM) featuring ultra-low current and low-voltage resistance. The battery monitor divides the input voltage (VIN) into 1/3 or 1/4 to a buffer output and inputs a signal directly into the MCU’s built-in low voltage AD converter without external circuits. It is suitable for use in wearable and IoT devices that require miniaturization and long-lifetime of battery.

    Key Benefits

    • Ultra-low consumption current (IQ: 0.3 µA) with the VFM control for DC/DC (switching frequency: 1 MHz max.)
    • High efficiency under light load conditions
    • Reducing components and space by combining DC/DC and BM into a single chip
    • Suitable for coin batteries and USB ports due to its wide input voltage range from 1.8 V to 5.5 V

  • Spec
    Input Voltage Range 1.8 V to 5.5 V (6.5 V)
    Operating Temperature Range -40°C to 85°C (125°C)
    Standby Current Typ. 0.01 µA
    Operating Quiescent Current DC/DC Section: Typ. 0.3 µA
    BM Section: Typ. 0.1 µA
    Output Voltage Range 1.0 V to 4.0 V (0.1 V step)
    Output Voltage Accuracy ±1.5% (Ta = 25°C)
    Output Current 300 mA
    Oscillator Frequency 1 MHz
    Package WLCSP-9-P2, DFN(PL)2527-10
    BM Output Voltage VIN /3 (RP515xxx3x)
    VIN /4 (RP515xxx4x)
    BM Output Voltage Accuracy ±30 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

    • Efficiency vs. Output Current (VOUT = 1.8 V)

      Efficiency vs. Output Current (VOUT = 1.8 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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