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RP506 Series
2A PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier

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  • Description

    The RP506 Series are low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP506 can be selected from two control types by input signal to the MODE pin - forced PWM control or PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current.

    RP506 includes a soft start circuit, an under-voltage lockout circuit (UVLO), thermal shutdown circuit and a latch protection circuit. By simply using an inductor and capacitors (and resistors) as external components, a high-efficiency step-down DC/DC converter can be easily configured. The oscillator frequency can be selected from 1.2MHz, 2.25MHz or 2.3MHz. The soft start time is Typ. 0.15ms, and by connecting an external capacitor to TSS pin, soft start time is adjustable. VOUT/VFB pin voltage is monitored, and the output voltage errors can be output from PG pin. The PG pin is N-channel open drain output type.

    RP506 is offered in a DFN(PL)2527-10 package for consumer application and a DFN3030-12 package for industrial and automotive applications.

  • Spec
    Consumer Industrial Automotive
    Input Voltage Range 2.5 V to 5.5 V (6.5 V)
    Operating Temperature Range -40°C to 85°C (125°C) -40°C to 105°C (125°C) -40°C to 125°C (150°C)
    -40°C to 105°C (150°C)
    Supply Current Typ. 48 µA(VFM, no load)
    Standby Current Typ. 0 µA
    Output Voltage Range Internally Fixed Ver.: 0.6 V to 3.3 V (0.1 V step)
    Externally Adjustable Ver.: 0.6 V to 4.0 V    		 Internally Fixed Ver.: 0.8 V, 1.0 V, 1.1 V, 1.2 V, 1.3 V, 1.5 V, 1.8 V, 1.85 V, 3.0 V, 3.3 V
    Externally Adjustable Ver.: 0.6 V to 4.0 V    		 Internally Fixed Ver.: 0.8 V, 1.0 V, 1.1 V, 1.2 V, 1.3 V, 1.5 V, 1.8 V, 1.85 V, 3.0 V, 3.3 V
    Externally Adjustable Ver.: 0.6 V to 4.0 V
    Output Voltage Accuracy ±1.5% (VSET ≥ 1.2 V , Ta = 25°C)
    ±18 mV (VSET < 1.2 V)
    Output Voltage Temperature Coefficient ±100 ppm/°C
    Feedback Voltage Accuracy ±9 mV (VFB = 0.6 V)
    Feedback Voltage Temperature Coefficient ±100 ppm/°C
    Output Current 2 A
    Driver ON-resistance Pch: Typ. 0.130 Ω, Nch: Typ. 0.125 Ω (VIN = 3.6 V)
    Oscillator Frequency Typ. 2.25 MHz, 1.2 MHz Typ. 2.3 MHz, 1.2 MHz Typ. 2.3 MHz, 1.2 MHz
    Maximum Duty Cycle Min. 100%
    Package DFN(PL)2527-10 DFN3030-12 DFN3030-12
    Download Datasheet

    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
    Functional Description
  • Technical
    Documents

    • Typical Application (Fixed Output Voltage Type)

      Typical Application (Fixed Output Voltage Type)

      Using Power good function, setting soft- start time for 30ms

    • Typical Application (Adjustable Output Voltage Type)

      Typical Application (Adjustable Output Voltage Type)

      Not using Power good function, setting soft-start time for 0.15ms

    • Efficiency vs. Output Current (A/B/C/G/H/N)

      Efficiency vs. Output Current (A/B/C/G/H/N)

    • Efficiency vs. Output Current (D/E/F/K/L/M)

      Efficiency vs. Output Current (D/E/F/K/L/M)

    • 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 &
    Packages
    Product Name Compatibility Package Marking Reliability
    RP506Kxx1x-TR
    • gradeConsumer
    • plp
    		 DFN(PL)2527-10 RP506K RP506K
    RP506Lxx1x-TR-Y
    • gradeIndustrial
    • plp
    		 DFN3030-12 RP506L RP506L-Y
    RP506Lxx1x-TR-K
    • gradeAutomotive
    • aecQ100
    • plp
    		 DFN3030-12 RP506L RP506L-K
    RP506Lxx1x-TR-A
    • gradeAutomotive
    • aecQ100
    • plp
    		 DFN3030-12 RP506L RP506L-A
    • 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.
  • Sample / Buy
Similar Products

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
VIN
min (V)		 2.5
VIN
max (V)		 5.5
VOUT
min (V)		 0.6
VOUT
max (V)		 4.0
IOUT
(mA)		 2000
ISS
(µA)		 48