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R5101 Series
System Power Supply with Watchdog Timer

Product Specifications

The R5101 Series are CMOS-based system power ICs with a voltage regulator (VR) featuring 50mA output, a voltage detector (VD) and a watchdog timer (WDT) integrated in a single chip. R5101 monitors the power system of devices equipped with microprocessors and prevents system runaway with a reset signal when a malfunction occurs. The output delay time of the VD and watchdog timeout period/reset time can be adjusted by an external capacitor with a high degree of accuracy. The R5101 is equipped with the function that inhibits clock monitoring of the WDT (CE).

FEATURES

Operating Voltage Range (Maximum Rating) 1.5 V to 10 V (12 V)
Supply Current Typ. 5 µA (VDD=VCE=-VSET+2V)
<Voltage Regulator (VR)>
Output Current (IOUT) 50 mA
Output Voltage Range 1.8 V to 5.0 V (0.1V steps)
Output Voltage Accuracy ±2.5%
<Voltage Detector (VD)>
Detector Threshold Range 1.7 V to 4.5 V (0.1V steps)
Detector Threshold Accuracy ±2.5%
Output Delay Time Min. 7ms, Typ. 14ms, Max. 35ms (CD=0.001µF)
Output Type Nch. Open Drain
<Watchdog Timer (WDT)>
Watchdog Timeout Period Typ. 120 ms (CW=0.01µF)
Reset Hold Time of WDT Typ. 12 ms (CW=0.01µF)
Package SSOP-8G

APPLICATION INFORMATION

TIMING CHART

* Vref2H : CTW pin voltage at the end of WDT timeout period.
* Vref2L : CTW pin voltage at the begin of WDT timeout period.
* TSCKW : SCK input pulse width

PIN DESCRIPTION

SSOP-8G2.9 mm × 4.0 mm

SSOP-8G

1 SCK
2 CD
3 CTW
4 VDD
5 VOUT
6 GND
7 CE
8 RESET

R5101 Series for Consumer

APPLICATIONS

  • Power source for microprocessors

SELECTION GUIDE

The output voltage and the detector threshold for the ICs can be selected at the users’ request.

Product Name   Package Quantity per Reel
R5101GxxxA-TR-FE Consumter SSOP-8G 3,000
  • xxx … The combination of output voltage and detector threshold for each channel can be designated by serial numbers.

DOCUMENT/CONTACT

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Package *1 Marking Reliability *2
SSOP-8G R5101G R5101G (-FE)

*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.

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