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R5115 Series

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

  • Consumer
  • Industrial
  • Automotive
  • PLP
  • AEC-Q100
  • RoHS

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.

Specs & Datasheets

  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

Download Datasheet

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

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
  • plpP
HSOP-8E R5115Sxx1 R5115Sxx1-FE
  • gradeConsumerC
  • plpP
HSOP-18 R5115Sxx2 R5115Sxx2-FE
  • gradeConsumerC
HQFN0808-28 R5115L R5115Lxx2-FE
  • gradeIndustrialI
  • plpP
HSOP-8E R5115Sxx1 R5115Sxx1-YE
  • gradeIndustrialI
  • plpP
HSOP-18 R5115Sxx2 R5115Sxx2-YE
  • gradeIndustrialI
HQFN0808-28 R5115L R5115Lxx2-YE
  • gradeAutomotiveA
  • aecQ1001
  • plpP
HSOP-8E R5115Sxx1 R5115Sxx1-KE
  • gradeAutomotiveA
  • aecQ1001
  • plpP
HSOP-8E R5115Sxx1 R5115Sxx1-AE
  • gradeAutomotiveA
  • aecQ1001
  • plpP
HSOP-18 R5115Sxx2 R5115Sxx2-KE
  • gradeAutomotiveA
  • aecQ1001
  • plpP
HSOP-18 R5115Sxx2 R5115Sxx2-AE
  • gradeAutomotiveA
  • aecQ1001
HQFN0808-28 R5115L R5115Lxx2-KE
  • gradeAutomotiveA
  • aecQ1001
HQFN0808-28 R5115L R5115Lxx2-AE

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.

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Functional Description

Search for similar products under conditions below.

Category:Watchdog Timers

Features Window WDT,+VD,+LDO
min (V)
max (V)