R5104V SERIES
Microprocessor power management with Watchdog Timer
NO.EA-136-111104
1
OUTLINE
The R5104V Series are high voltage tolerance CMOS-based microprocessor power management ICs with
high accuracy output voltage and detector threshold and with ultra low supply current. Each of these ICs consists
of a voltage regulator, a voltage detector and a watchdog timer. Thus, the R5104V Series have the function of a
power management for microprocessor, a monitor of the voltage of a power source and a microprocessor
supervisor.
The built-in voltage regulator with an external driver transistor can supply Min.1A current to a system.
Therefore these ICs are very suitable for various power supply systems for microprocessors. The output voltage
is monitored by the voltage detector which is built-in these ICs.
The built-in voltage detector has an output delay function and the delay time can be set by an external
capacitor (CD).
The output voltage and the detector threshold voltage can be set individually for each IC by laser trimming.
Furthermore, when a microprocessor works incorrectly, the watchdog timer which checks over microprocessor
generates reset signals intermittently to prevent a whole system from being malfunction.
The timeout periods for watchdog and reset can also be set individually by an external capacitor (CTW).
There are two kinds of power down function: "A" version turns off the supervisor of clock input for the
watchdog timer, while the "B" version turns off all the circuits and realizes the standby mode.
FEATURES
• Supply current................................................ Typ. 60μA (IOUT=0mA)
• Standby Current (B version)........................... Typ. 0.1μA
• Output Voltage ............................................... 3.3V to 5.0V
• Detector Threshold Voltage ........................... 2.8V to 4.0V
• Maximum Operating Input Voltage................. Max. 36V
• High Accuracy Output Voltage of Voltage Regulator and Detector Threshold ..... ±2.0%
• Built-in a watchdog timer
• Timeout period for watchdog and generating a reset signal can be set by an external capacitor
• Watchdog timer can be stopped individually by CE Pin
• Power-on Reset Delay Time can be set by an external capacitor
• Package ......................................................... SSOP-10
APPLICATION
• Power source for microprocessors
R5104
V
2
BLOCK DIAGRAMS
R5104VxxxA
GND
V
OUT
V
DD
C
D
C
TW
SCK
RESET
CE
9
EXT
V
r
ef
WDT
Level Shift
I
SENSE
－
＋
5
7
1
8
6
2
4
3
10
Current Limit
Vref
R5104VxxxB
GND
V
OUT
V
DD
C
D
C
TW
SCK
RESET
CE
9
EXT
V
r
ef
WDT
Level Shift
I
SENSE
－
＋
5
7
1
8
6
2
4
3
10
Current Limit
Vref
R5104
V
3
SELECTION GUIDE
The output voltage, the detector threshold, and the operation of the CE pin for the ICs can be selected at the
users’ request.
Product Name Package Quantity per Reel Pb Free Halogen Free
R5104Vxxx∗-E2-KG SSOP-10 2,000 pcs Yes Yes
xxx : The combination of output voltage and detector threshold for each channel can be designated by serial
numbers. (For details, please refer to MARK INFORMATIONS.)
∗ : The operation of the CE pin are options as follows.
(A) Watchdog timer off
(B) Standby mode
"-KG" of the product name shows that the product is for automotive (body system) use with the operating
temperature of -40°C to 125°C.
Please contact our sales representative or distributor for details.
PIN CONFIGURATION SSOP-10
1
2
3
4
5
10
9
8
7
6
PIN DESCRIPTIONS
Pin No Symbol Pin Description
1 VDD Power supply Pin Clock
2 ISENSE
Sense Pin for Current Limit of VR.
Monitoring the dropout voltage generated at an external resistor
between pin 1 and pin 2, if the dropout exceeds 0.3V (Typ.),
the current limit works.
3 VOUT Output Pin for Voltage Regulator
4 EXT External Transistor Drive Pin
5 RESET
Output Pin for Reset signal of Watchdog timer and Voltage Detector.
(Output Type is Nch Open Drain, Output “L” at detecting Detector
Threshold and Watchdog Timer Reset.)
6 SCK Clock Input Pin from Microprocessor
7 CTW External Capacitor Pin for Setting Reset and Watchdog Timeout
Periods
8 CD External Capacitor Pin for Setting Delay Time of Voltage Detector
9 CE
Control Switch Pin for halting Watchdog timer (A version),
or Chip Enable Pin (B version)
10 GND Ground Pin
R5104
V
4
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
VDD Supply Voltage -0.3 to 50 V
VPEAK Peak Input Voltage∗1 60 V
VCD Voltage of CD Pin VSS −0.3 to 7.5 V
VCTW Voltage of CTW Pin VSS −0.3 to 7.5 V
VOUT Voltage of VOUT Pin VSS −0.3 to 7.5 V
VRESET
Output Voltage∗2
Voltage of RESET Pin VSS −0.3 to 7.5 V
VCE Voltage of CE Pin VSS −0.3 to VIN+0.3 V
VISENSE Voltage of ISENSE Pin VSS −0.3 to VIN+0.3 V
VSCK
Input Voltage
Voltage of SCK Pin VSS −0.3 to VIN+0.3 V
IEXT Current of EXT Pin 10 mA
IRESET
Output Current
Current of RESET Pin 20 mA
PD Power Dissipation (SSOP-10)∗3 300 mW
Topt Operating Temperature Range -40 to +125 °C
Tstg Storage Temperature Range -55 to +140 °C
∗1) duration time=200ms
∗2) Do not force any voltage more than supply voltage to CD, CTW, VOUT, and RESET pins.
∗3) 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.
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.
R5104
V
5
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, VIN=CE=VISENSE=12V, IOUT=100mA, CCTW=0.1μF, C D=0.01μF)
• R5104VxxxA (Overall) Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
VIN Operating Voltage 36 V
ISS Supply Current IOUT=0mA 60 100
μA
Ioff Supply Current (WDT inactive) VIN=12V, CE=0V 50 90
μA
VCEH CE Input Voltage"H" 2.0 VIN+0.3 V
VCEL CE Input Voltage"L" 0 0.25 V
VR part
Symbol Item Conditions Min. Typ. Max. Unit
VOUT Output Voltage ×0.98 ×1.02 V
IOUT Output Current(*1) VIN=12V 1.0 A
VDIF Dropout Voltage(*1) IOUT=300mA 50 mV
ΔVOUT/ΔIOUT Load Regulation(*1) VIN=12V,1mA≤IOUT≤1A 15 60 mV
ΔVOUT/
ΔVIN Line Regulation(*1) IOUT=100mA
VOUT+1V≤VIN≤36V 0.05 0.10 %/V
ΔVOUT/
ΔTopt
Output Voltage Temperature
Coefficient (*1) -40°C≤Topt≤125°C ±50 ppm/°C
ISINK1 EXT Output Sink Current Limit VIN=12V, VOUT=VOUT-0.2V 9 14 20 mA
ISINK2 EXT Output Sink Current Limit
(Output short) VIN=12V, VOUT=0V 0.20 0.50 0.85 mA
VISENSE Current Limit Detector
Threshold 0.23 0.30 0.37 V
RR Ripple Rejection VIN=VOUT+1V, f=1kHz,
500mVp-p 55 dB
*1) Depending on the capability of an external PNP transistor. Use an hFE with approximately 100 to 300. The output
current does not always mean continuous current because of the limit of power dissipation of PNP transistor.
VD part
Symbol Item Conditions Min. Typ. Max. Unit
-VDET Detector Threshold ×0.98 ×1.02 V
VHYS Hysteresis Range (-VDET)
×0.01
(-VDET)
×0.02
(-VDET)
×0.03 V
Δ-VDET/
ΔTopt
Detector Threshold Temperature
Coefficient -40°C≤Topt≤125°C
±50 ppm/°C
VTCD CD pin detector threshold 2.35 2.50 2.65 V
ICD Internal Current value for
Delay Time Setting 0.12 0.30 0.47 μA
VINL Minimum Operating Voltage VOUT pin voltage 2.0 V
WDT part
Symbol Item Conditions Min. Typ. Max. Unit
tWD Watchdog Timeout period CTW=0.1μF 200 300 510 ms
tWR Reset Hold Time of WDT CTW=0.1μF 35 70 120 ms
VIHSCK SCK Input Voltage"H" 0.8×VOUT V
DD+0.3 V
VILSCK SCK Input Voltage"L" 0 0.1 V
-VDET≥3.0V 500
TSCKW SCK Input Pulse Width -VDET≤2.9V 5000
ns
R5104
V
6
(Unless otherwise specified, VIN=CE=VISENSE =12V, IOUT=100mA, CCTW=0.1μF, C D=0.01μF)
• R5104VxxxB (Overall) Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
VIN Operating Voltage 36 V
ISS Supply Current IOUT=0mA 60 100
μA
Ioff Supply Current (Standby) VIN=12V, CE=0V 0.1 0.5
μA
VCEH CE Input Voltage"H" 2.0 VIN+0.3 V
VCEL CE Input Voltage"L" 0 0.25 V
VR part
Symbol Item Conditions Min. Typ. Max. Unit
VOUT Output Voltage ×0.98 ×1.02 V
IOUT Output Current(*Note 1) VIN=12V 1.0 A
VDIF Dropout Voltage(*Note 1) IOUT=300mA 50 mV
ΔVOUT/ΔIOUT Load Regulation(*Note 1) VIN=12V ,1mA≤IOUT≤1A 15 60 mV
ΔVOUT/
ΔVIN Line Regulation(*Note 1) IOUT=100mA
VOUT+1V≤VIN≤36V 0.05 0.10 %/V
ΔVOUT/
ΔTopt
Output Voltage Temperature
Coefficient (*Note 1) -40°C≤Topt≤125°C ±50 ppm/°C
ISINK1 EXT Output Sink Current Limit VIN=12V, VOUT=VOUT-0.2V 9 14 20 mA
ISINK2 EXT Output Sink Current Limit
(Output short) VIN=12V, VOUT=0V 0.20 0.50 0.85 mA
VISENSE Current Limit Detector Threshold 0.23 0.30 0.37 V
RR Ripple Rejection VIN=VOUT+1V, f=1kHz,
500mVp-p 55 dB
*1) Depending on the capability of an external PNP transistor. Use an hFE with approximately 100 to 300. The
output current does not always mean continuous current because of the limit of power dissipation of PNP
transistor.
VD part
Symbol Item Conditions Min. Typ. Max. Unit
-VDET Detector Threshold ×0.98 ×1.02 V
VHYS Hysteresis Range (-VDET)
×0.01
(-VDET)
×0.02
(-VDET)
×0.03 V
Δ-VDET/
ΔTopt
Detector Threshold Temperature
Coefficient -40°C≤Topt≤125°C
±50 ppm/°C
VTCD CD pin detector threshold 2.35 2.50 2.65 V
ICD Internal Current value for
Delay Time Setting 0.12 0.30 0.47 μA
VINL Minimum Operating Voltage VOUT pin Voltage 2.0 V
WDT part
Symbol Item Conditions Min. Typ. Max. Unit
tWD Watchdog Timeout period CTW=0.1μF 200 300 510 ms
tWR Reset Hold Time of WDT CTW=0.1μF 35 70 130 ms
VIHSCK SCK Input Voltage"H" 0.8×VOUT V
DD+0.3 V
VILSCK SCK Input Voltage"L" 0 0.1 V
-VDET≥3.0V 500
TSCKW SCK Input Pulse Width -VDET≤2.9V 5000
ns
R5104
V
7
(Unless otherwise specified, VIN=CE=VISENSE =12V, IOUT=100mA, CCTW=0.1μF, C D=0.01μF)
• R5104V007A (Overall) Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
VIN Operating Voltage 36 V
ISS Supply Current IOUT=0mA 45 80
μA
Ioff Supply Current (WDT inactive) VIN=12V, CE=0V 45 80
μA
VCEH CE Input Voltage"H" 2.0 VIN+0.3 V
VCEL CE Input Voltage"L" 0.00 0.25 V
VR part
Symbol Item Conditions Min. Typ. Max. Unit
VOUT Output Voltage ×0.98 ×1.02 V
IOUT Output Current(*1) VIN=12V 1.0 A
VDIF Dropout Voltage(*1) IOUT=300mA 50 mV
ΔVOUT/ΔIOUT Load Regulation(*1) VIN=12V ,1mA≤IOUT≤1A 15 60 mV
ΔVOUT/
ΔVIN Line Regulation(*1) IOUT=100mA
VOUT+1V≤VIN≤36V 0.05 0.10 %/V
ΔVOUT/
ΔTopt
Output Voltage Temperature
Coefficient (*1) -40°C≤Topt≤125°C ±50 ppm/°C
ISINK1 EXT Output Sink Current Limit VIN=12V, VOUT=VOUT-0.2V 9 14 20 mA
ISINK2 EXT Output Sink Current Limit
(Output short) VIN=12V, VOUT=0V 0.20 0.50 0.85 mA
VISENSE Current Limit Detector
Threshold 0.23 0.30 0.37 V
RR Ripple Rejection VIN=VOUT+1V, f=1kHz,
500mVp-p 55 dB
*1) Depending on the capability of an external PNP transistor. Use an hFE with approximately 100 to 300. The
output current does not always mean continuous current because of the limit of power dissipation of PNP
transistor.
VD part
Symbol Item Conditions Min. Typ. Max. Unit
-VDET Detector Threshold ×0.98 ×1.02 V
VHYS Hysteresis Range (-VDET)
×0.01
(-VDET)
×0.02
(-VDET)
×0.03 V
Δ-VDET/
ΔTopt
Detector Threshold Temperature
Coefficient -40°C≤Topt≤125°C
±50 ppm/°C
VTCD CD pin detector threshold 2.35 2.50 2.65 V
ICD Internal Current value for
Delay Time Setting 0.12 0.30 0.47
μA
VINL Minimum Operating Voltage VOUT pin Voltage 2.0 V
WDT part
Symbol Item Conditions Min. Typ. Max. Unit
tWD Watchdog Timeout period CTW=0.1μF 200 300 510 ms
tWR Reset Hold Time of WDT CTW=0.1μF 35 70 130 ms
VIHSCK SCK Input Voltage"H" 0.8×VOUT V
DD+0.3 V
VILSCK SCK Input Voltage"L" 0.0 0.1 V
-VDET≥3.0V 500
TSCKW SCK Input Pulse Width -VDET≤2.9V 5000
ns
R5104
V
8
TIMING CHART
R5104VxxxA
t
WD
t
WR
V
DD
C
TW
SCK
V
OUT
V
ref
H
V
ref
L
CE
RESET
t
PLH
-V
DET
C
D
V
TCD
+V
DET
t
PLH
t
PLH
t
PLH
R5104
V
9
R5104VxxxB
t
WD
t
WR
V
DD
C
TW
SCK
V
OUT
V
ref
H
V
ref
L
CE
RESET
-V
DET
C
D
V
TCD
+V
DET
t
PHL
t
PHL
t
PHL
t
PHL
t
PHL
R5104
V
10
OPERATION
R5104VxxxA (Watchdog Timer On/Off type)
The R5104VxxxA have the function that turns off the clock input of the watchdog timer. When the watchdog
timer is enabled (CE="H"), the output of the internal regulator and SCK input pulse are supervised, while the
watchdog timer is disabled (CE="L"), only the regulator is supervised.
R5104VxxxB (Standby Function)
Since the standby function is included in the R5104VxxxB, the consumption current of the system can be
reduced. The supply current at the standby mode is very small, typically 0.1µA.
Output Delay Time Setting of the built-in voltage detector
The released delay time from reset of the voltage detector (tPLH) can be calculated with the external capacitor
value CD and the next formula.
t
PLH = VTCD x CD/ICD (S)
On the other hand, output delay time for detecting voltage (tPHL) is not specified, the time depends on the
capacitance value of CD.
TYPICAL APPLICATION
V
DD
I
SENSE
EXT
V
OUT
SCK
CE
RESET
C
TW
C
D
GND
V
IN
I
OUT
C
OUT
C
IN
C
D
C
CTW
R5104
V
11
TEST CIRCUITS
Standard Test Circuit Supply Current Test Circuit
VIN
IOUT
COUT CIN
CD
CCTW
VDD
ISENSE
EXT
VOUT
SCK
CE
RESET
CTW
CD
GND
VIN
COUT
CCTW
A
VDD
ISENSE
EXT
VOUT
SCK
CE
RESET
CTW
CD
GND
Standby Current Test Circuit EXT Sink Current Test Circuit
VIN
COUT
CCTW
A
VDD
ISENSE
EXT
VOUT
SCK
CE
RESET
CTW
CD
GND
VIN
COUT
CCTW
A
VOUT
CIN
VDD
ISENSE
EXT
VOUT
SCK
CE
RESET
CTW
CD
GND
Ripple Rejection Test Circuit
VIN
IOUT
COUT
CCTW
Vp
Vp
P. G.
VDD
ISENSE
EXT
VOUT
SCK
CE
RESET
CTW
CD
GND
R5104
V
12
TYPICAL CHARACTERISTICS
(Unless otherwise provided, VIN=VISENSE=CE=12V, CIN=0.1μF, COUT=10μF, CTW=0.1μF, CD=10μF, Top t =25°C)
1) Output Voltage vs. Output Current
5.0V 3.3V
0.0
6.0
3.0
2.0
4.0
5.0
1.0
0 500 15001000 2000
Output Current IOUT(mA)
Output Voltage VOUT
(V)
VIN=12V
VIN=6V
VIN=9V
I
SENSE
Resistance=0
Ω
0.0
3.5
1.5
1.0
2.0
2.5
3.0
0.5
0 500 15001000 2000
Output Current I
OUT
(mA)
Output Voltage V
OUT
(V)
V
IN=
12V
V
IN=
4.3V
V
IN=
9V
ISENSE Resistance=0
Ω
5.0V 3.3V
0.0
6.0
3.0
2.0
4.0
5.0
1.0
0 100 300200 400
Output Current IOUT(mA)
Output Voltage VOUT
(V)
I
SENSE
Resistance=1
Ω
0.0
4.0
1.5
1.0
2.0
3.0
2.5
3.5
0.5
0 100 300200 400
Output Current IOUT(mA)
Output Voltage VOUT
(V)
I
SENSE
Resistance=1
Ω
2) Output Voltage vs. Input Voltage
5.0V 3.3V
0.0
5.5
2.0
1.0
3.0
2.5
1.5
3.5
4.5
4.0
5.0
0.5
010 403020 50
Input Voltage VIN(V)
Output Voltage V
OUT(V)
IOUT=100mA
0.0
4.0
2.0
1.0
3.0
2.5
1.5
3.5
0.5
010 403020 50
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
I
OUT
=100mA
R5104
V
13
3) Output Voltage vs. Temperature
5.0V 3.3V
4.85
5.15
4.95
5.05
5.00
5.10
4.90
-40 5 95653520-25 -10 1108050 125
Temperature Topt(°C)
Output Voltage V
OUT
(V)
I
OUT
=100mA
3.20
3.40
3.26
3.34
3.30
3.38
3.22
3.28
3.36
3.32
3.24
-40 5 95653520-25 -10 1108050 125
Temperature Topt(°C)
Output Voltage V
OUT
(V)
I
OUT
=100mA
4) Base Current Limit vs. Output Voltage
5.0V 3.3V
0.0
6.0
3.0
2.0
4.0
5.0
1.0
05 1510 20
EXT Output Current ISINK(mA)
Output Voltage V
OUT(V)
VIN
=12V
0.0
4.0
1.5
1.0
2.0
2.5
3.0
3.5
0.5
05 1510 20
EXT Output Current ISINK(mA)
Output Voltage V
OUT(V)
VIN
=12V
5) Ripple Rejection vs. Frequency
0
90
30
20
40
50
60
70
80
10
0.1 101 100
Frequency f(kHz)
Ripple Rejeciton RR(dB)
V
IN
=
V
OUT
+
1V,500mVp-p
R5104
V
14
6) Input Transient Response
5.0V 3.3V
12
17
22
7
27
0 0.1 0.2 0.3 0.4
3.0
5.0
4.0
6.0
Input Voltage
V
IN(V)
Output Voltage V
OUT(V)
Time t (ms)
Output Voltage
Input Voltage
10.3
15.3
20.3
5.3
25.3
0 0.1 0.2 0.3 0.4
1.3
3.3
2.3
4.3
Input Voltage
V
IN(V)
Output Voltage VOUT(V)
Time t (ms)
Output Voltage
Input Voltage
7) Load Transient Response
5.0V 3.3V
75
100
50
125
0 0.1 0.2 0.3 0.4
3.0
5.0
4.0
Output
Current
I
OUT(mA)
Output Voltage V
OUT(V)
Time t (ms)
Output Voltage
Output Current
75
100
50
125
0 0.1 0.2 0.3 0.4
1.3
3.3
2.3
Output
Current
I
OUT(mA)
Output Voltage V
OUT(V)
Time t (ms)
Output Voltage
Output Current
8) Detector Threshold vs. Temperature
4.0V 2.8V
3.85
4.15
3.95
4.05
4.00
4.10
3.90
-40 5 95653520-25 -10 1108050 125
Temperature Topt(°C)
Detector Threshold-V
DET
(V)
2.70
2.90
2.80
2.85
2.75
-40 5 95653520-25 -10 1108050 125
Temperature Topt(°C)
VD Detector Threshold-V
DET
(V)
R5104
V
15
9) Output Voltage vs. Output Current 10) CD Pin Threshold vs. Temperature
0.10
0.50
0.20
0.30
0.25
0.40
0.35
0.45
0.15
-40 5 95653520-25 -10 1108050 125
Temperature Topt(°C)
Output Delay Time
Setting Current I
CD
(μA)
2.40
2.80
2.50
2.60
2.55
2.70
2.65
2.75
2.45
-40 5 95653520-25 -10 1108050 125
Temperature Topt(°C)
C
D
pin Threshold Voltage V
TCD
(V)
11)
C
D
Pin External Capacitance vs. Delay Time
12) WDT monitoring Time vs. Temperature
0.001
10000
0.1
10
1
1000
100
0.01
0.001 0.01 0.1
External Capacitance(μF)
Output Delay Time for Release,
t
PLH
and Reset, t
PHL
(ms)
t
PLH
t
PHL
200
400
240
280
260
320
300
360
340
380
220
-40 5 95653520-25 -10 1108050 125
Temperature Topt(°C)
WDT monitoring Time t
WD
(ms)
C
CTW
=0.1μF
I
OUT
=100mA
13) WDT Reset Time vs. Temperature
14)
External Capacitance vs.
WDT monitoring/Reset Time
50
100
60
70
65
80
75
90
85
95
55
-40 5 95653520-25 -10 1108050 125
Temperature Topt(°C)
WDT Reset Time t
WR
(ms)
C
CTW
=0.1μF
0.1
10000
1
10
1000
100
0.001 0.01 0.1 1
External Capacitance(μF)
Monitoring Time,t
WD
/Reset Time,
t
WR
(ms)
t
WD
t
WR
R5104
V
16
15) Supply Current vs. Temperature 16) Supply Current vs. Input Voltage
5.0V
0
80
40
20
60
-40 5 95653520-25 -10 1108050 125
Temperature Topt(°C)
S uppl y Current I
SS
(μA)
I
OUT
=0mA
0
120
40
20
60
80
100
510 3020 40 50
Temperature Topt(°C)
S uppl y Current I
SS
(μA)
I
OUT
=0mA
17
)
Current limit detector threshold vs. Temperature
18) Nch Driver Output Current vs. VDS
0.20
0.40
0.24
0.28
0.26
0.32
0.30
0.36
0.34
0.38
0.22
-40 5 95653520-25 -10 1108050 125
Temperature Topt(°C)
Current Limit Detector Threshold
V
ISENSE
(V)
0.0
6.0
3.0
2.0
5.0
4.0
1.0
0.0 0.5 2.0 2.51.0 5.03.5 4.53.01.5 4.0
VDS(V)
-VDET=3.4V
Output Current I
OUT(mA)
VOUT=3.4V
3.0V
2.5V
2.0V
19) Nch Driver Output Current vs. VGS
0.00
0.30
0.15
0.10
0.25
0.20
0.05
0.0 2.01.0 5.03.0 4.0
V
GS
(V)
-V
DET
=3.4V,RESET=0.05V
Output Current I
OUT
(mA)
-40°C
25°C
85°C
125°C
R5104
V
17
TECHNICAL NOTES
The phase compensation is made with the phase compensation circuit in the IC and the ESR of the output
capacitor to make the operation stable. Therefore connect a 10μF or more value capacitor between VOUT and
GND. The ESR range of the output capacitor should be approximately 1Ω to 10Ω.
The fluctuation and the noise of the supply voltage, or a drastic change of the output voltage by the load
transition of the regulator might be the reason of the mis-operation of the watchdog timer. If the SCK input
pulse frequency is beyond 10kHz, or if the capacitance value of CTW pin is large, the watchdog timer is easily
affected by the fluctuation or noise of the supply voltage, or the fluctuation of the regulator output voltage, and
it may cause an unstable operation.
If VIN (supply voltage) may swing momentary, the regulator output is also swings. If the output of the voltage
regulator becomes lower than detector voltage threshold, the built-in detector may generate the reset signal.
Built-in over-current limit works as monitoring the sink current of EXT pin and limits the current. Considering
the over-current of the corrector current caused by short of EXT pin and GND externally, set a resistor
between EXT pin and the base of the external driver transistor to limit the base current.
Use a 100pF or more value capacitor for CTW pin.
Use a 10pF or more capacitor for CD pin. A capacitor must be connected to CD pin to use R5104VxxxA.
To avoid the mis-operation, during watchdog timer monitoring time, there is some ignoring time against clock
pulse. Therefore, during the ignoring time, input clock pulse (rising edge trigger) is ignored. The ignoring time
VREF2H is approximately as follows:
The time interval for CTW pin voltage from VREF2H to VREF2H−(VREF2H−VREF2L)/4
RICOHCOMPANY,LTD.
ElectronicDevicesCompany
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●Taipeioffice
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1.Theproductsandtheproductspecificationsdescribedinthisdocumentaresubjecttochangeor
discontinuationofproductionwithoutnoticeforreasons
suchasimprovement.Therefore,before
decidingtousetheproducts,pleaserefertoRicohsalesrepresentativesforthelatest
informationthereon.
2.Thematerialsinthisdocumentmaynotbecopiedorotherwisereproducedinwholeorinpart
withoutpriorwrittenconsentofRicoh.
3.Pleasebesuretotakeanynecessaryformalitiesunderrelevantlawsorregulationsbefore
exportingorotherwisetakingoutofyourcountrytheproductsorthetechnicalinformation
describedherein.
4.Thetechnicalinformationdescribedinthisdocumentshowstypicalcharacteristicsofand
exampleapplicationcircuitsfortheproducts.Thereleaseofsuchinformationisnottobe
construedasawarrantyoforagrantoflicenseunderRicoh'soranythirdparty'sintellectual
propertyrightsoranyotherrights.
5.
Theproductslistedinthisdocumentareintendedanddesignedforuseasgeneralelectronic
componentsinstandardapplications(officeequipment,telecommunicationequipment,
measuringinstruments,consumerelectronicproducts,amusementequipmentetc.).Those
customersintendingtouse
aproductinanapplicationrequiringextremequalityandreliability,
forexample,inahighlyspecificapplicationwherethefailureormisoperationoftheproduct
couldresultinhumaninjuryordeath(aircraft,spacevehicle,nuclearreactorcontrolsystem,
trafficcontrolsystem,automotiveand
transportationequipment,combustionequipment,safety
devices,lifesupportsystemetc.)shouldfirstcontactus.
6.Wearemakingourcontinuousefforttoimprovethequalityandreliabilityofourproducts,but
semiconductorproductsarelikelytofailwithcertainprobability.Inordertopreventanyinjuryto
personsordamagestopropertyresultingfromsuchfailure,customersshouldbecarefulenough
toincorporatesafetymeasuresintheirdesign,suchasredundancyfeature,firecontainment
featureandfail-safefeature.Wedonotassumeanyliability
orresponsibilityforanylossor
damagearisingfrommisuseorinappropriateuseoftheproducts.
7.Anti-radiationdesignisnotimplementedintheproductsdescribedinthisdocument.
8.
PleasecontactRicohsalesrepresentativesshouldyouhaveanyquestionsorcomments
concerningtheproductsorthetechnicalinformation.
RICOHCOMPANY.,LTD.ElectronicDevicesCompany
■
Ricoh presented with the Japan Management Quality Award for 1999
.
Ricoh continually strives to promote customer satisfaction, and shares the achievements
of its management quality improvement program with people and society.
■Ricoh awarded ISO 14001 certification.
The Ricoh Group was awarded ISO 14001 certification, which is an international standard for
environmental management systems, at both its domestic and overseas production facilities.
Our current aim is to obtain ISO 14001 certification for all of our business offices.
Ricoh completed the organization of the Lead-free production for all of our products.
After Apr. 1, 2006, we will ship out the lead free products only. Thus, all products that
will be shipped from now on comply with RoHS Directive.