R3117N481A Datasheet PDF - RICOH
| Part Number | R3117N481A | |
| Description | LOW VOLTAGE DETECTOR | |
| Manufacturers | RICOH | |
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R3117x SERIES
LOW VOLTAGE DETECTOR with SENSE pin
NO.EA-186-080617
OUTLINE
The R3117x series are CMOS-based voltage detector ICs with high detector threshold accuracy and ultra-low
supply current, which can be operated at an extremely low voltage and is used for system reset as an example.
Each of these ICs consists of a voltage reference unit, a comparator, resistors for detector threshold setting,
an output driver and a hysteresis circuit. The detector threshold is fixed with high accuracy internally and does
not require any adjustment.
The tolerance of the detector threshold is ±15mV (-VDET <= 1.5V) or ±1.0% (1.5V< -VDET). Since the sense pin is
separated from the VDD pin of the IC, therefore, even if the sense pin voltage becomes to 0V, the output voltage
keeps its "L" level.
Two output types, Nch open drain type and CMOS type are available.
Three types of packages, SOT-23-5, SC-88A, and DFN(PLP)1010-4 are available.
FEATURES∗
• Supply Current ......................................................................Typ. 0.29µA (VDD=6.0V)
Consumption current through SENSE pin is not included.
• Range of Operating Voltage..................................................1.0V to 6.0V (-40°C <= Topt <= 105°C)
• Detector Threshold Range....................................................Stepwise setting with a step of 0.1V in the range
of 0.7V to 5.0V
• Accuracy Detector Threshold................................................±1.0% (-VDET >= 1.6V), ±15mV (-VDET<1.6V)
• Temperature-Drift Coefficient of Detector Threshold ............Typ. ±30ppm/°C
• Output Types.........................................................................Nch Open Drain and CMOS
• Packages ..............................................................................SOT-23-5, DFN(PLP)1010-4, SC-88A
∗ Topt=25°C, unless otherwise noted.
APPLICATIONS
• CPU and Logic Circuit Reset
• Battery Checker
• Window Comparator
• Wave Shaping Circuit
• Battery Back-up Circuit
• Power Failure Detector
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R3117x
Symbol
Item
Conditions
Min. Typ. Max. Unit
-VDET < 1.5V
6 25
RSENSE Sense Resistor
1.5V <= -VDET < 4.7V
5 40 MΩ
4.7V <= -VDET
10 40
VDD Operating Voltage
VDDL
Minimum Operating
Voltage*2
-40°C <= Topt <= 105°C
Topt=25°C
-40°C <= Topt <= 105°C
1.0 6.0 V
0.50
0.55
V
IOUT
Output Current
(Driver Output Pin)
ILEAK
Nch Driver Leakage
Current*4
Nch
Pch*3
VDD=0.6V, VDS=0.05V
-VDET < 1.1V
VDD=0.6V
VDS=0.5V
1.1V <= -VDET < 1.6V
VDD=1.0V
VDS=0.5V
1.6V <= -VDET < 3.1V
VDD=1.5V
VDS=0.5V
3.1V <= -VDET
VDD=3.0V
VDS=0.5V
-VDET < 4.0V
VDD=4.5V
VDS=2.1V
4.0V <= -VDET
VDD=6.0V
VDS=2.1V
VDD=6.0V, VDS=7.0V
7
0.020
0.400
1.000
2.400
0.650
0.900
µA
mA
mA
140 nA
∆-VDET/
∆Topt
Detector Threshold
Temperature
Coefficient
-40°C <= Topt <= 105°C
±30
ppm
/°C
tPHL
Detector Output Delay
Time*5
VDD=5V
-VDET < 1.5V
1.5V <= -VDET
80
40
µs
tPLH
Release Output Delay
Time*5
VDD=5V
-VDET < 4.5V
4.5V <= -VDET
40
80
µs
All of unit are tested and specified under load conditions such that Topt=25°C except for Detector Threshold
Temperature Coefficient, Detector Output Delay Time and Release Output Delay Time.
*1: Consumption current through SENSE pin is not included.
*2: In case that the VDD pin and SENSE pin are connected and the value shows the minimum supply voltage (VDD) when the
output voltage at detector threshold can be maintained as 0.1V or less. (In case of Nch open drain type, pull-up resistor
is 470kΩ and pull-up voltage is set at 5V for testing.) If VDD is high enough, down to 0V is acceptable for SENSE pin.
*3: In case of CMOS type
*4: In case of Nch Open Drain type
*5: In the case of CMOS output type: Time interval from forcing pulsive 6.0V to -VDET-2.0V or 0V, or from forcing 0V to
-VDET+2.0V or 6.0V to SENSE pin, to when the output voltage will reach VDD/2.
In the case of Nch Open drain output type: Output pin is pulled up to 5V with 470kΩ and time interval from forcing 6.0V
to -VDET-2.0V or 0V, or forcing pulsive 0V to -VDET+2.0V or 6.0V to when the output voltage reaches up to 2.5V.
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the
recommended operating conditions, even if when they are used over such conditions by momentary
electronic noise or surge. And the semiconductor devices may receive serious damage when they continue
to operate over the recommended operating conditions.
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Featured Datasheets
| Part Number | Description | MFRS |
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