R1260 Series
60V Input / 80V Absolute Maximum Rating Synchronous Step-down DC/DC Controller

  • Description

    The R1260 is a step-down DC/DC controller which can generate an output voltage of 1.0 V to 16.0 V by driving external high- / low-side NMOSFETs. By the adoption of a unique current mode PWM architecture without an external current sense resistor, this device can make up a stable DC/DC converter with high-efficiency even if adding low Ron MOSFETs and a low DCR inductor externally.

    Key Benefits

    • 48 V power can be provided by a wide-ranging input voltage of 5 V to 60 V.
    • High-accuracy feedback voltage: 0.8 V ±1.5% (Operating Temperature Range)
    • High efficiency at light load (IOUT=1mA) by VFM control (80% @VIN=24V, 70% @VIN=48V)

  • Spec
    Consumer Industrial Automotive
    Input Voltage Range 5.0 V to 60.0 V (80.0 V)
    Operating Temperature Range -40°C to 105°C (125°C) -40°C to 125°C (150°C) -40°C to 125°C (150°C)
    Supply Current Typ. 15 µA (at VFM mode)
    Standby Current Typ. 3 µA
    Output Voltage Range Externally Adjustable: 1.0 V to 16.0 V
    Feedback Voltage 0.8 V
    Feedback Voltage Accuracy ±1.5%
    Oscillator Frequency Externally Adjustable: 150 kHz to 600 kHz
    Package HSOP-18

    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 (at 250 kHz)

      Typical Application
    • Efficiency vs. Output Current

      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.

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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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