R3119x SERIES
36V INPUT VOLTAGE DETECTOR
NO.EA-187-160229
OUTLINE
R3119x Series are CMOS-based 36V input (absolute maximum ratings: 50V) voltage detector with high
detector threshold accuracy and ultra-low supply current. Each of those ICs consists of a voltage reference unit,
a comparator, resistors for detector threshold setting, an output driver and a hysteresis circuit.
There are two types: R3119xxxxA has the CD pin for setting the output delay time. R3119xxxxE has the SENSE
pin.
The supply current of IC is only 3.3μA. The detector threshold is fixed in the IC and can be set with a step of
0.1V in the range of 2.3V to 12V. Detector threshold accuracy is 1.5%. The output type is Nch Open drain type.
The R3119x is offered in a small-size 6-pin DFN(PLP)1820-6 package in addition to a 5-pin SOT-23-5 package.
FEATURES
• Supply Current ...................................................................... Typ. 3.3µA
• Operating Voltage Range...................................................... 1.2V to 36.0V (CD pin type: R3119xxxxA)
2.1V to 6.0V (SENSE pin type: R3119xxxxE)
• Operating Temperature Range ............................................. −40°C to 105°C
• Detector Threshold Range .................................................... 2.3V to 12.0V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
• Detector Threshold Accuracy ................................................ ±1.5% (Topt=25°C)
• Temperature-Drift Coefficient of Detector Threshold ............ Typ. ±100ppm/°C
• Output Delay Time (Power ON Reset Delay Time)............... Typ. 85ms (CD=0.01µF, CD pin type)
• Output Delay Time Accuracy................................................. −50% to 80% (CD pin type: R3119xxxxA)
• Output Type........................................................................... Nch Open Drain
• Package ................................................................................ SOT-23-5, DFN(PLP)1820-6
APPLICATIONS
•
•
•
•
CPU and Logic Circuit Reset
Battery Checker
Battery Back-up Circuit
Power Failure Detector for Digital home appliances
1
R3119x
NO.EA-187-160229
BLOCK DIAGRAMS
R3119xxxxA
R3119xxxxE
SENSE
VDD
DOUT
VDD
DOUT
Delay
Circuit
Vref
Vref
GND
GND
CD
SELECTION GUIDE
The package type, the detector threshold and the version for the ICs can be selected at the users’ request.
Product Name
Package
Quantity per Reel
Pb Free
Halogen Free
SOT-23-5
3,000 pcs
Yes
Yes
DFN(PLP)1820-6
5,000 pcs
Yes
Yes
R3119Nxxx∗-TR-FE
R3119Kxxx∗-TR
xxx: The detector threshold can be designated in the range from 2.3V(023) to 12.0V(120) in 0.1V steps.
(For other voltages, please refer to MARK INFORMATIONS.)
∗ : Designation of Version
(A) with CD pin type
(E) with SENSE pin type
2
R3119x
NO.EA-187-160229
PIN CONFIGURATIONS
•SOT-23-5
5
•DFN(PLP)1820-6
4
Top View
6
5
4
2
4
5
6
2
1
∗1
(mark side)
1
Bottom View
1
3
2
3
3
PIN DESCRIPTIONS
•
SOT-23-5
Pin No.
Symbol
1
VDD
2
GND∗
Ground Pin
3
GND∗
Ground Pin
4
DOUT
Output Pin
5
Description
Input Pin
("L" at detection)
CD
R3119NxxxA
Connecting pin with external capacitor for setting delay time
SENSE
R3119NxxxE
Voltage Detector Voltage Sense Pin
∗) No. 2 and No.3 pins must be wired to the GND plane when it is mounted on board.
● DFN(PLP)1820-6
Pin No.
Symbol
1
GND
2
NC
No Connection
3
VDD
Input Pin
CD
R3119KxxxA
Connecting pin with external capacitor for setting delay time
SENSE
R3119KxxxE
Voltage Detector Voltage Sense Pin
4
Description
Ground Pin
5
NC
No Connection
6
DOUT
Output Pin
("L" at detection)
∗) Tab is GND level. (They are connected to the reverse side of this IC.) The tab is better to be connected to
the GND, but leaving it open is also acceptable.
3
R3119x
NO.EA-187-160229
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
R3119xxxxA
−0.3 to 50.0
R3119xxxxE
−0.3 to 7.0
VDD
Supply Voltage
VOUT
Output Voltage (DOUT Pin)
VCD
Output Voltage (CD Pin)
R3119xxxxA
−0.3 to 7.0
Input Voltage (SENSE Pin)
R3119xxxxE
−0.3 to 50.0
VSENSE
IOUT
PD
−0.3 to 7.0
Output Current (DOUT Pin)
Power Dissipation (SOT-23-5)
20
∗
Power Dissipation (DFN(PLP)1820-6)∗
420
880
Unit
V
V
V
mA
mW
Topt
Operating Temperature Range
−40 to 105
°C
Tstg
Storage Temperature Range
−55 to 125
°C
∗) For Power Dissipation, please refer to PACKAGE INFORMATION.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the
permanent damages and may degrade the life time and safety for both device and system using the device
in the field.
The functional operation at or over these absolute maximum ratings is not assured.
4
R3119x
NO.EA-187-160229
ELECTRICAL CHARACTERISTICS
•
R3119xxxxA (CD pin type)
The specification in
is checked and guaranteed by design engineering at −40°C ≤ Topt ≤ 105°C.
Topt=25°C
Symbol
Item
-VDET
Detector Threshold
VHYS
Detector Threshold
Hysteresis
ISS
Supply Current
VDDH
Maximum Operating
Voltage
VDDL
Minimum Operating
Voltage∗
Conditions
VDD pin
IOUT
∆-VDET/
∆Topt
tdelay
Max.
×0.985
×1.015
−40°C ≤ Topt ≤ 105°C
×0.970
×1.020
5
6.5
VDD= -VDET−0.1V
3.3
5.6
VDD= -VDET+1.0V
3.3
5.5
3.5
36
Topt=25°C
1.2
−40°C ≤ Topt ≤ 105°C
1.25
2.3V ≤ -VDET < 2.6V
2.6V ≤ -VDET < 3.0V
3.0V ≤ -VDET
ILEAK
Typ.
Topt=25°C
230
VDD=1.5V, VDS=0.05V
Output Current
(Driver Output Pin)
Min.
Nch Driver Leakage
Current
VDD=36V, VDS=6.0V
Detector Threshold
Temperature Coefficient
−40°C ≤ Topt ≤ 105°C
Detector Output Delay
Time
VDD=1.5V → -VDET+2.0V
CD=0.01µF
VDD=2.2V
VDS=0.5V
VDD=2.5V
VDS=0.5V
VDD=2.9V
VDS=0.5V
Unit
V
%
µA
V
V
µA
2.8
3.3
mA
3.5
0.2
ppm
/°C
±100
45
85
µA
150
ms
All of unit are tested and specified under load conditions such that Tj≈Topt=25°C except for Detector Threshold
Temperature Coefficient.
∗) This value is the minimum input voltage when the output voltage is 0.1V or less at detection.
(The pull-up resistance; 100kΩ, the pull-up voltage; 5.0V)
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.
5
R3119x
NO.EA-187-160229
•
R3119xxxxE (SENSE pin type)
The specification in
is checked and guaranteed by design engineering at −40°C ≤ Topt ≤ 105°C.
Topt=25°C
Symbol
Item
Conditions
VDD
Operating Voltage
-VDET
Detector Threshold
SENSE pin
VDD=6V
VHYS
Detector Threshold
Hysteresis
VDD=6V
ISS
Supply Current
RSENSE
Sense Resistor
IOUT
ILEAK
∆-VDET/
∆Topt
tPLH
VSENSE
Output Current
(Driver Output Pin)
Max.
Unit
2.1∗
6
V
Topt=25°C
×0.985
×1.015
−40°C ≤ Topt ≤ 105°C
×0.970
×1.020
Typ.
5
6.5
VDD=6V, VSENSE= -VDET−0.1V
3.3
5.5
VDD=6V, VSENSE= -VDET+1.0V
3.3
5.5
3.5
4.5
VSENSE < -VDET
VSENSE < -VDET
VDD=2.1V
VDS=0.05V
VDD=2.2V
VDS=0.5V
Nch Driver Leakage
Current
VDD=6V, VSENSE=36V, VDS=6.0V
Detector Threshold
Temperature Coefficient
−40°C ≤ Topt ≤ 105°C
Output Delay Time
VDD=6V
VSENSE=1.5V → -VDET+2.0V
Input Voltage
(SENSE Pin)
Min.
120
V
%
µA
MΩ
420
µA
2.8
mA
0.2
µA
±100
ppm
/°C
15
µs
0
36
V
All of unit are tested and specified under load conditions such that Tj≈Topt=25°C except for Detector Threshold
Temperature Coefficient and Output Delay Time.
∗) Minimum operating voltage of "SENSE pin type" is minimum supply voltage to obtain correct detection voltage.
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.
6
R3119x
NO.EA-187-160229
TIMING CHART
Supply
Voltage
(VDD)
Released Voltage (+VDET)
Detector Threshold (-VDET)
CD Pin
Voltage
CD Pin Threshold Voltage
(VTCD)
GND
Output
Voltage
(VOUT)
GND
Output Delay Time (tdelay) Detect Delay Time (treset)
When the supply voltage, which is higher than released voltage, is forced to VDD pin, charge to an external
capacitor starts, then CD pin voltage increases. Until the CD pin voltage reaches to CD pin threshold voltage, output
voltage maintains "L". When the CD pin voltage becomes higher than CD pin threshold voltage, output voltage is
reversed from "L" to "H". Where the time interval between the rising edge of supply voltage and output voltage
reverse point means output delay time.
When the output voltage reverses from "L" to "H", the external capacitor starts to discharge. Therefore, when
lower voltage than the detector threshold voltage is forced to VDD pin, the output voltage reverses from "H" to "L"
thus the detect delay time is constant not being affected by the external capacitor.
•
Output Delay Time
Output Delay Time (tdelay) can be calculated with the next formula using the external capacitor:
tdelay (s) = 8.5 × 106 × CD (F)
DEFINITION OF OUTPUT DELAY TIME
Output Delay Time (tdelay) is defined as follows:
Under the condition of the output pin (DOUT) is pulled up through a resistor of 100kΩ to 5V, the time interval
between the rising edge of VDD pulse from 1.5V to (-VDET)+2.0V pulse voltage is supplied, the becoming of the
output voltage to 2.5V.
-VDET+2.0V
Supply
Voltage
(VDD)
1.5V
GND
5.0V
Output
Voltage
(VOUT)
2.5V
GND
treset
tdelay
R3119xxxxA
7
R3119x
NO.EA-187-160229
OPERATION
•
Operation of R3119xxxxA (CD pin type)
VDD
Ra
Comparator
Delay
Circuit
DOUT pin should be pulled-up to
an external voltage level.
DOUT
Rb
Vref
Nch
Tr.1
Rc
GND
CD
Block Diagram of External Capacitor Connection
1
Released Voltage +VDET
Detector Threshold -VDET
A
2
3
4
Detector Threshold
Hysteresis
5
B
Supply Voltage
(VDD)
Minimum Operating Voltage VDDL
GND
Step
1
2
3
4
5
Comparator (−)
Pin Input Voltage
I
II
II
II
I
Comparator Output
L
H
Indefinite
H
L
Tr.1
OFF ON Indefinite ON OFF
Output Tr. (Nch)
OFF ON Indefinite ON OFF
I
Pull-up Voltage
Output Voltage
(VOUT)
Detect
Delay Time
treset
Output
Delay Time
tdelay
GND
II
Rb+Rc
×VDD
Ra+Rb+Rc
Rb
Ra+Rb
×VDD
Operation Diagram
•
Explanation of operation
Step 1. The output voltage is equal to the pull-up voltage.
Step 2. At Point "A", Vref ≥ VDD×(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reversed
from "L" to "H", therefore the output voltage becomes the GND level. The voltage level of Point A means
a detector threshold voltage (-VDET).
Step 3. When the supply voltage is lower than the minimum operating voltage, the operation of the output
transistor becomes indefinite. The output voltage is equal to the pull-up voltage.
Step 4. The output voltage is equal to the GND level.
Step 5. At Point "B", Vref ≤ VDD×Rb/(Ra+Rb) is true, as a result, the output of comparator is reversed from "H" to
"L", then the output voltage is equal to the pull-up voltage. The voltage level of Point B means a released
voltage (+VDET).
∗) The difference between a released voltage and a detector threshold voltage is a detector threshold hysteresis.
8
R3119x
NO.EA-187-160229
•
Operation of R3119xxxxE (SENSE pin type)
SENSE
VDD
Ra
Comparator
DOUT
DOUT pin should be pulled-up to
an external voltage level.
Rb
Vref
Nch
Tr.1
Rc
GND
Block Diagram
1
2
3
Supply Voltage (VDD)
Minimum Operating VDDL
Voltage
Released Voltage
+VDET
Detector Threshold -VDET
A
Detector Threshold
Hysteresis
B
SENSE Pin Voltage
(VSENSE)
GND
Step
1
2
3
Comparator (−)
Pin Input Voltage
I
II
I
Comparator Output
L
H
L
Tr.1
OFF
ON
OFF
Output Tr. (Nch)
OFF
ON
OFF
I
Pull-up Voltage
Detect Delay Time
Output Voltage
(VOUT)
tPHL
Output
Delay Time
tPLH
II
Rb+Rc
×VSENSE
Ra+Rb+Rc
Rb
Ra+Rb
×VSENSE
GND
Operation Diagram
•
Explanation of operation
Step 1. SENSE pin voltage is larger than detector threshold; the output voltage is equal to the pull-up voltage.
Step 2. At Point "A", Vref ≥ VSENSE×(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reversed
from "L" to "H", therefore the output voltage becomes the GND level. The voltage level of Point A means
a detector threshold voltage (-VDET). (When the supply voltage is higher than the minimum operating
voltage, the output voltage is equal to the GND level.)
Step 3. At Point "B", Vref ≤ VSENSE×Rb/(Ra+Rb) is true, as a result, the output of comparator is reversed from "H"
to "L", then the output voltage is equal to the pull-up voltage. The voltage level of Point B means a
released voltage (+VDET).
∗) The difference between a released voltage and a detector threshold voltage is a detector threshold hysteresis.
9
R3119x
NO.EA-187-160229
Power supply injection order
The R3119xxxxE Series supervise the voltage of the SENSE pin. VDD pin and SENSE pin can be used at the
same voltage level. Likewise, VDD pin and SENSE pin can be used at the different voltage level. If the VDD pin and
SENSE pin are used at different voltage level, regarding the start-up sequence, force the voltage level to VDD pin
prior to the SENSE pin.
If the SENSE pin voltage is equal or more than the released voltage (+VDET), DOUT pin becomes "H"(Fig.1).
Besides, a voltage beyond VDD pin is also acceptable to SENSE pin.
VDD
+VDET
VSENSE
VOUT
t
Fig.1 Turn on sequence
10
R3119x
NO.EA-187-160229
Detector Operation vs. glitch input voltage to the VDD pin or SENSE
pin
When the R3119x is at released, if the pulse voltage which the detector threshold or lower voltage, the graph
below means that the relation between pulse width and the amplitude of the swing to keep the released state for
the R3119x.
R3119xxxxA
R3119xxxxE
Pulse Width
Sense Voltage (VSENSE)
Detector Threshold (-VDET)
Over Drive
VSENSE Input Waveform
This graph shows the maximum pulse conditions to keep the released voltage. If the pulse with larger amplitude
or wider width than the graph above, is input to the VDD pin (R3119xxxxA) or to the SENSE pin (R3119xxxxE), the
reset signal may be output.
11
R3119x
NO.EA-187-160229
TYPICAL APPLICATION
•
R3119xxxxA (CD pin type)
(1) Input Voltage to R3119xxxxA is equal to Input Voltage to CPU
VDD
100kΩ R
VDD
VDD
CD
R3119xxxxA
Series
CPU
RESET
DOUT
GND
GND
(2) Input Voltage to R3119xxxxA is unequal to Input Voltage to CPU
VDD1
VDD2
100kΩ R
VDD
CD
R3119xxxxA
Series
CPU
RESET
DOUT
GND
GND
•
VDD
R3119xxxxE (SENSE pin type)
(1) Input Voltage to R3119xxxxE is equal to Input Voltage to CPU
VSENSE
VDD
100kΩ R
VDD
R3119xxxxE
Series
DOUT
SENSE
GND
12
VDD
CPU
RESET
GND
R3119x
NO.EA-187-160229
(2) Input Voltage to R3119xxxxE is unequal to Input Voltage to CPU
VSENSE
VDD1
VDD2
100kΩ R
VDD
VDD
CPU
R3119xxxxE
Series
DOUT
SENSE
RESET
GND
GND
TEST CIRCUITS
•
R3119xxxxA (CD pin type)
ISS
5V
A
100kΩ
VDD
VIN
R3119xxxxA
Series
GND
VDD
DOUT
R3119xxxxA
Series
VIN
CD
GND
Supply Current Test Circuit
VIN
DOUT
R3119xxxxA
Series
GND
V
CD
Detector Threshold Test Circuit
IOUT
VDD
VOUT
DOUT
A
CD
Nch Driver Output Current Test Circuit
5V
-VDET
+2.0V
VDS
VDD
1.5V
GND
P.G.
DOUT
R3119xxxxA
Series
CD
GND
100kΩ
VOUT
10nF
Output Delay Time Test Circuit
13
R3119x
NO.EA-187-160229
•
R3119xxxxE (SENSE pin type)
ISS
5V
A
VDD
VDD
6V
R3119xxxxE
Series
DOUT
SENSE
6V
R3119xxxxE
Series
DOUT
SENSE
100kΩ
GND
GND
Supply Current Test Circuit
VOUT
V
Detector Threshold Test Circuit
5V
VDD
VIN
R3119xxxxE
Series
DOUT
SENSE
IOUT
-VDET
+2.0V
A
1.5V
GND
GND
Nch Driver Output Current Test Circuit
14
VDS
6V
VDD
R3119xxxxE
Series
DOUT
SENSE
P.G.
GND
Output Delay Time Test Circuit
100kΩ
V
R3119x
NO.EA-187-160229
TYPICAL CHARACTERISTICS
1) Supply Current vs. Input Voltage
R3119x023A
R3119x077A
R3119x120A
2) Detector Threshold vs. Temperature
R3119x023A/E
R3119x077A/E
15
R3119x
NO.EA-187-160229
R3119x120A/E
3) Output Voltage vs. Input Voltage
R3119x023A/E
R3119x120A/E
16
R3119x077A/E
R3119x
NO.EA-187-160229
4) Nch Driver Output Current vs. Input Voltage
R3119x023A
R3119x077A
R3119x120A
5) Nch Driver Output Current vs. VDS
R3119x023A
R3119x077A
17
R3119x
NO.EA-187-160229
R3119x120A
6) Output Delay Time vs. External Capacitance (Topt=25°C)
R3119x023A
R3119x120A
18
R3119x077A
R3119x
NO.EA-187-160229
7) Output Delay Time vs. Temperature (CD=0.01µF)
R3119x023A
R3119x077A
R3119x120A
8) Supply Current vs. Input Voltage
R3119xxxxE (at released)
R3119xxxxE (at detected)
19
R3119x
NO.EA-187-160229
9) Detector Threshold vs. Input Voltage
R3119x023E
R3119x077E
R3119x120E
10) Detector Threshold Hysteresis vs. Input Voltage
R3119x023E
20
R3119x077E
R3119x
NO.EA-187-160229
R3119x120E
11) Output Voltage vs. SENSE pin Input Voltage (Topt=25°C) (DOUT pull up to VDD with 100kΩ)
R3119x023E
R3119x077E
R3119x120E
21
R3119x
NO.EA-187-160229
12) Nch Driver Output Current vs. Input Voltage
R3119xxxxE
13) Nch Driver Output Current vs. VDS
R3119xxxxE
22
R3119x
NO.EA-187-160229
TECHNICAL NOTES
When connecting resistors to the device’s input pin
When connecting a resistor (R1) to an input of this device, the input voltage decreases by [Device’s
Consumption Current] x [Resistance Value] only. And, the cross conduction current*1, which occurs when
changing from the detecting state to the release state, is decreased the input voltage by [Cross Conduction
Current] x [Resistance Value] only. And then, this device will enter the re-detecting state if the input voltage
reduction is larger than the difference between the detector voltage and the released voltage.
When the input resistance value is large and the VDD is gone up at mildly in the vicinity of the released voltage,
repeating the above operation may result in the occurrence of output.
As shown in Figure A/B, set R1 to become 100 kΩ or less as a guide, and connect CIN of 0.1 μF and more to
between the input pin and GND. Besides, make evaluations including temperature properties under the actual
usage condition, with using the evaluation board like this way. As a result, make sure that the cross conduction
current has no problem.
R1
R1
VDD
CIN
*2
Voltage
Detector
VDD
OUT pin
R2
CIN
*2
GND
Figure A
Voltage
Detector
OUT pin
GND
Figure B
*1 In the CMOS output type, a charging current for OUT pin is included.
*2 Note the bias dependence of capacitors.
23
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Shin-Yokohama Office (International Sales)
2-3, Shin-Yokohama 3-chome, Kohoku-ku, Yokohama-shi, Kanagawa, 222-8530, Japan
Phone: +81-50-3814-7687 Fax: +81-45-474-0074
Ricoh Americas Holdings, Inc.
675 Campbell Technology Parkway, Suite 200 Campbell, CA 95008, U.S.A.
Phone: +1-408-610-3105
Ricoh Europe (Netherlands) B.V.
Semiconductor Support Centre
Prof. W.H. Keesomlaan 1, 1183 DJ Amstelveen, The Netherlands
Phone: +31-20-5474-309
Ricoh International B.V. - German Branch
Semiconductor Sales and Support Centre
Oberrather Strasse 6, 40472 Düsseldorf, Germany
Phone: +49-211-6546-0
Ricoh Electronic Devices Korea Co., Ltd.
3F, Haesung Bldg, 504, Teheran-ro, Gangnam-gu, Seoul, 135-725, Korea
Phone: +82-2-2135-5700 Fax: +82-2-2051-5713
Ricoh Electronic Devices Shanghai Co., Ltd.
Room 403, No.2 Building, No.690 Bibo Road, Pu Dong New District, Shanghai 201203,
People's Republic of China
Phone: +86-21-5027-3200 Fax: +86-21-5027-3299
Ricoh Electronic Devices Shanghai Co., Ltd.
Shenzhen Branch
1205, Block D(Jinlong Building), Kingkey 100, Hongbao Road, Luohu District,
Shenzhen, China
Phone: +86-755-8348-7600 Ext 225
Ricoh Electronic Devices Co., Ltd.
Taipei office
Room 109, 10F-1, No.51, Hengyang Rd., Taipei City, Taiwan (R.O.C.)
Phone: +886-2-2313-1621/1622 Fax: +886-2-2313-1623
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