RP500 Series
600mA PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier

Download Datasheet

  • Description

    The RP500 Series are low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP500 can be selected from two control types - fixed PWM control or PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. RP500 includes a soft start circuit, an under-voltage lockout circuit (UVLO), and a latch protection circuit. By simply using an inductor and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured.

  • Spec
    Input Voltage Range 2.55 V to 5.5 V (6.5 V)
    Operating Temperature Range -40°C to 85°C (125°C)
    Supply Current Typ. 400 µA (PWM, no switching)
    Typ. 100 µA (VFM, no switching)
    Standby Current Typ. 0 µA
    Output Voltage Range 1.1 V to 3.3 V (0.1 V step)
    Output Voltage Accuracy ±1.5% (VOUT ≥ 1.6 V, Ta = 25°C)
    ±24 mV (VOUT < 1.6 V)
    Output Voltage Temperature Coefficient ±100 ppm/°C
    Output Current 600 mA
    Driver ON-resistance Pch: Typ. 0.3 Ω, Nch: 0.38 Ω (VIN = 3.6 V)
    Oscillator Frequency Typ. 1.2 MHz
    Maximum Duty Cycle Min. 100%
    Package DFN(PL)1820-6, SOT-23-6W

    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

    • RP500x331A/333A Efficiency vs. Output Current

      RP500x331A/333A 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.

        • [V]
        • [V]
        • [V]
        • [A]
  • 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

Search for similar products under conditions below.

Category:DC/DC Switching Regulators

Topology Buck
min (V)
max (V)
min (V)
max (V)