RP507 Series
600mA PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier

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  • Description

    The RP507 is low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. The RP507 is PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. The output voltage is adjustable with external divider resistors. The RP507 includes a soft start circuit, an under-voltage lockout circuit (UVLO), thermal shutdown circuit, and an auto-discharge circuit.

    By simply using an inductor, capacitors and resistors as external components, a high-efficiency step-down DC/DC converter can be easily configured. A small size inductor (2.0 x 1.2mm, 2.2µH), a small size input capacitor (1.0 x 0.5mm, 4.7µF) and output capacitor (1.0 x 0.5mm, 10µF) can be used. A 1.6mm × 1.6mm DFN(PL)1616-6D package is available.

  • Spec
    Input Voltage Range 2.3 V to 5.5 V (6.5 V)
    Operating Temperature Range -40°C to 85°C (125°C)
    Supply Current Typ. 32 µA
    Standby Current Typ. 0 µA
    Output Voltage Range 0.7 V to 5.5 V (As for 1.0 V or less, input voltage range is limited.)
    Output Voltage Accuracy ±1.5% (Ta = 25°C)
    Feedback Voltage 0.6 V
    Feedback Voltage Accuracy ±9 mV
    Feedback Voltage Temperature Coefficient Typ. ±100 ppm/°C
    Output Current 600 mA
    Driver ON-resistance Pch: Typ. 0.38 Ω, Nch: Typ. 0.3 Ω (VIN = 3.6 V)
    Oscillator Frequency Typ. 2.0 MHz
    Maximum Duty Cycle 100%
    Package DFN(PL)1616-6D

    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
    • RP507K001B Typical Application

      RP507K001B Typical Application

      L : 2.2µH / 4.7µH

    • RP507K001B Efficiency vs. Output Current (VOUT=1.8V, L=2.2µH)

      RP507K001B Efficiency vs. Output Current (VOUT=1.8V, L=2.2µH)

    • RP507K001B Efficiency vs. Output Current (VOUT=3.3V, L=4.7µH)

      RP507K001B Efficiency vs. Output Current (VOUT=3.3V, L=4.7µH)

    • 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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