R5115 Series
Low Supply Current 42V Input System Power Supply with Window-type Watchdog Timer

  • Description

    The R5115 is a system power supply IC with an ultra-low power window-type watchdog timer (LDO + VD + WDT) that has an input voltage range of 3.5 V to 42 V.

    The R5115 offers a low current consumption of 8.5 µA at operation and 0.2 µA at standby. When ECU goes into sleep, the device automatically turns the built-in WDT off to prevent it from sending a reset signal. When ECU goes back to active, the device automatically turns the built-in WDT on to resume the ECU monitoring.

    The R5115 is also available with the version that is not equipped with an auto monitoring stop.

    The R5115 is equipped with a window-type watchdog timer that is capable of detecting errors not only caused by over-timing but also by short-timing.

  • Spec
    Consumer Industrial Automotive
    Input Voltage Range 3.5 V to 42.0 V (50.0 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. 8.5 µA
    Standby Current Typ. 0.2 µA
    Open Window Time Typ. 18 ms (CTW = 10 nF)
    Closed Window Time Typ. 4.5 ms (CTW = 10 nF)
    Pulse Ignoring Time Typ. 18 ms (CTW = 10 nF)
    Timeout Period Typ. 18 ms
    Timeout Period Accuracy -17.8% to 21.7%
    Reset Time Typ. 9 ms (CTW = 10 nF)
    Package HSOP-8E, HSOP-18, HQFN0808-28
    VD Detector Threshold Range 2.5 V to 4.8 V
    VD Detector Threshold Accuracy ±1.6%
    VD Release Output Delay Time Typ. 220 ms (CD = 0.22 µF)
    LDO Output Voltage Range 3.3 V to 5.0 V
    LDO Output Voltage Accuracy ±1.6%
    LDO Short-circuit Current Limit Typ. 95 mA
    LDO Output Current Limit Typ. 440 mA
    LDO Thermal Shutdown Typ. 170°C
  • Technical
    Documents
    • R5115Sxx2C Typical Application

      R5115Sxx2C Typical Application

      CIN = Ceramic 0.1 µF, COUT = Ceramic 0.1 µF

    • R5115Sxx2C (Window type) Timing Chart

      R5115Sxx2C (Window type) Timing Chart

      * tRESET : Release Delay Time
      * tIGN : Ignoring Time
      * tOW : Open Window Time
      * tCW : Closed Window Time
      * tWR : Reset Time

  • Quality &
    Packages
    • Refer to the datasheets for the details on the product.
    • The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
    • Please contact us or our distributors for unpublished reliability information.

Download Datasheet

Functional Description

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Category:Watchdog Timers

Features Window WDT,+VD,+LDO
VIN
min (V)
3.5
VIN
max (V)
42.0
ISS
(µA)
8.5