R5104V003A-E2-KG [RICOH]
Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO10, HALOGEN FREE AND LEAD FREE, SSOP-10;
| 型号： | R5104V003A-E2-KG |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO10, HALOGEN FREE AND LEAD FREE, SSOP-10 光电二极管 |
| 文件： | 总18页 (文件大小：905K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
R5104V SERIES
Microprocessor power management with Watchdog Timer
NO.EA-136-111104
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
1
R5104V
BLOCK DIAGRAMS
R5104VxxxA
CE
9
Level Shift
WDT
SCK
6
2
RESET
5
ISENSE
Current Limit
C
TW
7
1
EXT
4
3
V
DD
VOUT
Vref
－
＋
Vref
C
D
8
GND
10
R5104VxxxB
CE
9
5
Level Shift
WDT
SCK
6
2
RESET
ISENSE
Current Limit
C
TW
7
1
EXT
4
3
V
DD
VOUT
Vref
－
＋
Vref
C
D
8
GND
10
2
R5104V
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
SSOP-10
2,000 pcs
Yes
Yes
R5104Vxxx∗-E2-KG
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
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.
2
ISENSE
3
4
VOUT
Output Pin for Voltage Regulator
External Transistor Drive Pin
EXT
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.)
5
RESET
6
7
SCK
CTW
CD
Clock Input Pin from Microprocessor
External Capacitor Pin for Setting Reset and Watchdog Timeout
Periods
8
External Capacitor Pin for Setting Delay Time of Voltage Detector
Control Switch Pin for halting Watchdog timer (A version),
or Chip Enable Pin (B version)
9
CE
10
GND
Ground Pin
3
R5104V
ABSOLUTE MAXIMUM RATINGS
Symbol
VDD
Item
Rating
-0.3 to 50
Unit
V
Supply Voltage
Peak Input Voltage∗1
VPEAK
VCD
60
V
Voltage of CD Pin
V
VSS −0.3 to 7.5
VSS −0.3 to 7.5
VSS −0.3 to 7.5
VSS −0.3 to 7.5
VSS −0.3 to VIN+0.3
VSS −0.3 to VIN+0.3
VSS −0.3 to VIN+0.3
10
VCTW
VOUT
VRESET
VCE
Voltage of CTW Pin
Voltage of VOUT Pin
V
Output Voltage∗2
V
V
RESET
Voltage of
Pin
Pin
Voltage of CE Pin
Voltage of ISENSE Pin
Voltage of SCK Pin
Current of EXT Pin
V
Input Voltage
VISENSE
VSCK
IEXT
V
V
mA
mA
Output Current
IRESET
PD
20
RESET
Current of
Power Dissipation (SSOP-10)∗3
Operating Temperature Range
Storage Temperature Range
300
mW
°C
Topt
-40 to +125
-55 to +140
Tstg
°C
∗1) duration time=200ms
RESET
∗2) Do not force any voltage more than supply voltage to CD, CTW, VOUT, and
∗3) For Power Dissipation, please refer to PACKAGE INFORMATION.
pins.
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.
4
R5104V
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, VIN=CE=VISENSE=12V, IOUT=100mA, CCTW=0.1μF, CD=0.01μF)
• R5104VxxxA (Overall)
Topt=25°C
Symbol
Item
Conditions
Min.
Typ.
Max.
Unit
V
VIN
Operating Voltage
36
100
ISS
Supply Current
60
50
IOUT=0mA
μA
μA
V
Ioff
Supply Current (WDT inactive)
CE Input Voltage"H"
CE Input Voltage"L"
90
VIN=12V, CE=0V
VCEH
2.0
0
VIN+0.3
0.25
VCEL
VR part
Symbol
VOUT
V
Item
Output Voltage
Conditions
Min.
×0.98
1.0
Typ.
Max.
Unit
V
×1.02
IOUT
Output Current(*1)
Dropout Voltage(*1)
Load Regulation(*1)
A
VIN=12V
IOUT=300mA
VIN=12V,1mA≤IOUT≤1A
IOUT=100mA
VDIF
50
15
mV
mV
60
ΔVOUT/ΔIOUT
ΔVOUT/
ΔVIN
Line Regulation(*1)
0.05
0.10
%/V
VOUT+1V≤VIN≤36V
ΔVOUT/
ΔTopt
ISINK1
Output Voltage Temperature
Coefficient (*1)
-40°C≤Topt≤125°C
±50
14
ppm/°C
mA
EXT Output Sink Current Limit
EXT Output Sink Current Limit
(Output short)
Current Limit Detector
Threshold
VIN=12V, VOUT=VOUT-0.2V
VIN=12V, VOUT=0V
9
20
ISINK2
VISENSE
RR
0.20
0.50
0.85
mA
0.23
0.30
55
0.37
V
VIN=VOUT+1V, f=1kHz,
500mVp-p
Ripple Rejection
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
-VDET
Item
Conditions
-40°C≤Topt≤125°C
VOUT pin voltage
Min.
Typ.
Max.
Unit
Detector Threshold
V
×0.98
×1.02
(-VDET) (-VDET) (-VDET)
×0.01 ×0.02 ×0.03
VHYS
Hysteresis Range
V
Δ-VDET/
ΔTopt
VTCD
Detector Threshold Temperature
Coefficient
ppm/°C
±50
CD pin detector threshold
Internal Current value for
Delay Time Setting
2.35
0.12
2.50
0.30
2.65
0.47
2.0
V
μA
V
ICD
VINL
WDT part
Symbol
tWD
Minimum Operating Voltage
Item
Conditions
CTW=0.1μF
CTW=0.1μF
Min.
200
Typ.
300
70
Max.
510
Unit
ms
ms
V
Watchdog Timeout period
Reset Hold Time of WDT
SCK Input Voltage"H"
SCK Input Voltage"L"
tWR
35
120
VIHSCK
VILSCK
VDD+0.3
0.1
0.8×VOUT
0
V
-VDET≥3.0V
-VDET≤2.9V
500
TSCKW
SCK Input Pulse Width
ns
5000
5
R5104V
(Unless otherwise specified, VIN=CE=VISENSE =12V, IOUT=100mA, CCTW=0.1μF, CD=0.01μF)
• R5104VxxxB (Overall)
Topt=25°C
Symbol
Item
Operating Voltage
Supply Current
Conditions
IOUT=0mA
Min.
Typ.
Max.
36
Unit
V
VIN
ISS
60
100
0.5
μA
μA
V
V
Ioff
Supply Current (Standby)
CE Input Voltage"H"
CE Input Voltage"L"
0.1
VIN=12V, CE=0V
VCEH
2.0
0
VIN+0.3
0.25
VCEL
VR part
Symbol
VOUT
Item
Conditions
Min.
×0.98
1.0
Typ.
Max.
Unit
V
Output Voltage
×1.02
IOUT
Output Current(*Note 1)
Dropout Voltage(*Note 1)
Load Regulation(*Note 1)
A
VIN=12V
VDIF
50
15
mV
mV
IOUT=300mA
60
ΔVOUT/ΔIOUT
VIN=12V ,1mA≤IOUT≤1A
ΔVOUT/
ΔVIN
IOUT=100mA
VOUT+1V≤VIN≤36V
Line Regulation(*Note 1)
0.05
0.10
%/V
ΔVOUT/
ΔTopt
ISINK1
Output Voltage Temperature
Coefficient (*Note 1)
-40°C≤Topt≤125°C
±50
14
ppm/°C
mA
mA
V
EXT Output Sink Current Limit
EXT Output Sink Current Limit
(Output short)
VIN=12V, VOUT=VOUT-0.2V
VIN=12V, VOUT=0V
9
20
ISINK2
VISENSE
RR
0.20
0.23
0.50
0.30
55
0.85
0.37
Current Limit Detector Threshold
VIN=VOUT+1V, f=1kHz,
500mVp-p
Ripple Rejection
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
-40°C≤Topt≤125°C
VOUT pin Voltage
Min.
Typ.
Max.
Unit
-VDET
Detector Threshold
V
×0.98
×1.02
(-VDET) (-VDET) (-VDET)
×0.01 ×0.02 ×0.03
VHYS
Hysteresis Range
V
Δ-VDET/
ΔTopt
VTCD
Detector Threshold Temperature
Coefficient
ppm/°C
±50
CD pin detector threshold
Internal Current value for
Delay Time Setting
2.35
0.12
2.50
0.30
2.65
0.47
2.0
V
μA
V
ICD
VINL
WDT part
Symbol
tWD
Minimum Operating Voltage
Item
Conditions
CTW=0.1μF
CTW=0.1μF
Min.
200
Typ.
300
70
Max.
510
Unit
ms
ms
V
Watchdog Timeout period
Reset Hold Time of WDT
SCK Input Voltage"H"
SCK Input Voltage"L"
tWR
35
130
VIHSCK
VILSCK
VDD+0.3
0.1
0.8×VOUT
0
V
-VDET≥3.0V
-VDET≤2.9V
500
TSCKW
SCK Input Pulse Width
ns
5000
6
R5104V
(Unless otherwise specified, VIN=CE=VISENSE =12V, IOUT=100mA, CCTW=0.1μF, CD=0.01μF)
• R5104V007A (Overall)
Topt=25°C
Symbol
Item
Conditions
IOUT=0mA
Min.
Typ.
Max.
36
Unit
V
VIN
Operating Voltage
ISS
Supply Current
45
45
80
μA
μA
V
V
Ioff
Supply Current (WDT inactive)
CE Input Voltage"H"
CE Input Voltage"L"
80
VIN=12V, CE=0V
VCEH
2.0
VIN+0.3
0.25
VCEL
VR part
Symbol
VOUT
0.00
Item
Output Voltage
Conditions
Min.
×0.98
1.0
Typ.
Max.
Unit
V
×1.02
IOUT
Output Current(*1)
Dropout Voltage(*1)
Load Regulation(*1)
A
VIN=12V
VDIF
50
15
mV
mV
IOUT=300mA
60
ΔVOUT/ΔIOUT
VIN=12V ,1mA≤IOUT≤1A
ΔVOUT/
ΔVIN
IOUT=100mA
VOUT+1V≤VIN≤36V
Line Regulation(*1)
0.05
0.10
%/V
ΔVOUT/
ΔTopt
ISINK1
Output Voltage Temperature
Coefficient (*1)
-40°C≤Topt≤125°C
±50
14
ppm/°C
mA
EXT Output Sink Current Limit
EXT Output Sink Current Limit
(Output short)
Current Limit Detector
Threshold
VIN=12V, VOUT=VOUT-0.2V
VIN=12V, VOUT=0V
9
20
ISINK2
VISENSE
RR
0.20
0.50
0.85
mA
0.23
0.30
55
0.37
V
VIN=VOUT+1V, f=1kHz,
500mVp-p
Ripple Rejection
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
-40°C≤Topt≤125°C
VOUT pin Voltage
Min.
Typ.
Max.
Unit
-VDET
Detector Threshold
V
×0.98
×1.02
(-VDET) (-VDET) (-VDET)
×0.01 ×0.02 ×0.03
VHYS
Hysteresis Range
V
Δ-VDET/
ΔTopt
VTCD
Detector Threshold Temperature
Coefficient
ppm/°C
±50
CD pin detector threshold
Internal Current value for
Delay Time Setting
2.35
0.12
2.50
0.30
2.65
0.47
2.0
V
μA
V
ICD
VINL
WDT part
Symbol
tWD
Minimum Operating Voltage
Item
Conditions
CTW=0.1μF
CTW=0.1μF
Min.
200
Typ.
300
70
Max.
510
Unit
ms
ms
V
Watchdog Timeout period
Reset Hold Time of WDT
SCK Input Voltage"H"
SCK Input Voltage"L"
tWR
35
130
VIHSCK
VILSCK
VDD+0.3
0.1
0.8×VOUT
0.0
V
-VDET≥3.0V
-VDET≤2.9V
500
TSCKW
SCK Input Pulse Width
ns
5000
7
R5104V
TIMING CHART
R5104VxxxA
VDD
CE
VOUT
+VDET
-VDET
tPLH
tPLH
C
D
VTCD
tWD
VrefH
C
TW
VrefL
tPLH
tPLH
SCK
tWR
RESET
8
R5104V
R5104VxxxB
VDD
CE
VOUT
+VDET
-VDET
tPHL
tPHL
C
D
VTCD
tWD
VrefH
C
TW
VrefL
tPHL
tPHL
tPHL
SCK
tWR
RESET
9
R5104V
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.
tPLH = 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
IN
V
DD
CE
I
SENSE
RESET
EXT
CTW
C
CTW
I
OUT
V
OUT
CD
C
D
SCK
GND
C
IN
C
OUT
10
R5104V
TEST CIRCUITS
Standard Test Circuit
Supply Current Test Circuit
VIN
VIN
A
VDD
CE
VDD
CE
RESET
CTW
ISENSE
EXT
RESET
CTW
ISENSE
EXT
CCTW
CIN
IOUT
VOUT
SCK
CD
CCTW
CD
VOUT
SCK
CD
GND
COUT
GND
COUT
Standby Current Test Circuit
EXT Sink Current Test Circuit
VIN
VIN
A
VDD
CE
RESET
CTW
VDD
CE
RESET
CTW
CIN
ISENSE
EXT
ISENSE
EXT
A
CCTW
VOUT
CCTW
VOUT
SCK
CD
VOUT
SCK
CD
COUT
GND
GND
COUT
Ripple Rejection Test Circuit
VIN
Vp
VDD
CE
RESET
CTW
P.G.
ISENSE
EXT
IOUT
VOUT
SCK
CD
CCTW
COUT
GND
Vp
11
R5104V
TYPICAL CHARACTERISTICS
(Unless otherwise provided, VIN=VISENSE=CE=12V, CIN=0.1μF, COUT=10μF, CTW=0.1μF, CD=10μF, Topt=25°C)
1) Output Voltage vs. Output Current
5.0V
3.3V
I
SENSE Resistance=0
Ω
ISENSE Resistance=0
Ω
6.0
5.0
4.0
3.0
2.0
1.0
0.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
VIN=6V
VIN=9V
VIN=12V
V
V
V
IN=4.3V
IN=9V
IN=12V
0
500
1000
1500
2000
0
500
1000
1500
2000
Output Current IOUT(mA)
Output Current IOUT(mA)
5.0V
3.3V
ISENSE Resistance=1
Ω
I
SENSE Resistance=1
Ω
6.0
5.0
4.0
3.0
2.0
1.0
0.0
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
100
200
300
400
0
100
200
300
400
Output Current IOUT(mA)
Output Current IOUT(mA)
2) Output Voltage vs. Input Voltage
5.0V
3.3V
IOUT=100mA
I
OUT=100mA
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
10
20
30
40
50
0
10
20
30
40
50
Input Voltage VIN(V)
Input Voltage VIN(V)
12
R5104V
3) Output Voltage vs. Temperature
5.0V
3.3V
I
OUT=100mA
I
OUT=100mA
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
-40 -25 -10
5
20 35 50 65 80 95 110 125
-40 -25 -10
5
20 35 50 65 80 95 110 125
Temperature Topt(°C)
Temperature Topt(°C)
4) Base Current Limit vs. Output Voltage
5.0V
3.3V
V
IN=12V
VIN=12V
6.0
5.0
4.0
3.0
2.0
1.0
0.0
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
5
10
15
20
0
5
10
15
20
EXT Output Current ISINK(mA)
EXT Output Current ISINK(mA)
5) Ripple Rejection vs. Frequency
V
IN=
V
OUT
+1V,500mVp-p
90
80
70
60
50
40
30
20
10
0
0.1
1
10
100
Frequency f(kHz)
13
R5104V
6) Input Transient Response
5.0V
3.3V
27
22
17
12
7
25.3
20.3
15.3
10.3
5.3
Input Voltage
Input Voltage
6.0
5.0
4.3
3.3
2.3
1.3
Output Voltage
4.0
Output Voltage
3.0
0
0.1
0.2
0.3
0.4
0
0.1
0.2
0.3
0.4
Time t (ms)
Time t (ms)
7) Load Transient Response
5.0V
3.3V
125
100
75
125
100
75
Output Current
Output Current
50
50
5.0
3.3
2.3
1.3
Output Voltage
4.0
Output Voltage
3.0
0
0.1
0.2
0.3
0.4
0
0.1
0.2
0.3
0.4
Time t (ms)
Time t (ms)
8) Detector Threshold vs. Temperature
4.0V
2.8V
4.15
2.90
2.85
2.80
2.75
2.70
4.10
4.05
4.00
3.95
3.90
3.85
-40 -25 -10
5
20 35 50 65 80 95 110 125
-40 -25 -10
5
20 35 50 65 80 95 110 125
Temperature Topt(°C)
Temperature Topt(°C)
14
R5104V
9) Output Voltage vs. Output Current
10) C Pin Threshold vs. Temperature
D
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
2.80
2.75
2.70
2.65
2.60
2.55
2.50
2.45
2.40
-40 -25 -10
5
20 35 50 65 80 95 110 125
-40 -25 -10
5
20 35 50 65 80 95 110 125
Temperature Topt(°C)
Temperature Topt(°C)
11)
CD
Pin External Capacitance vs. Delay Time
12) WDT monitoring Time vs. Temperature
C
CTW=0.1μF
10000
1000
100
10
400
380
360
340
320
300
280
260
240
220
200
t
PLH
1
0.1
I
OUT=100mA
0.01
t
PHL
0.001
0.001
0.01
External Capacitance(μF)
0.1
-40 -25 -10
5
20 35 50 65 80 95 110 125
Temperature Topt(°C)
13) WDT Reset Time vs. Temperature
14) External Capacitance vs.
WDT monitoring/Reset Time
C
CTW=0.1μF
100
95
90
85
80
75
70
65
60
55
50
10000
1000
tWD
100
10
1
t
WR
0.1
-40 -25 -10
5
20 35 50 65 80 95 110 125
0.001
0.01
0.1
1
Temperature Topt(°C)
External Capacitance(μF)
15
R5104V
15) Supply Current vs. Temperature
16) Supply Current vs. Input Voltage
5.0V
I
OUT=0mA
I
OUT=0mA
80
60
40
20
0
120
100
80
60
40
20
0
-40 -25 -10
5
20 35 50 65 80 95 110 125
5
10
20
30
40
50
Temperature Topt(°C)
Temperature Topt(°C)
17
)
Current limit detector threshold vs. Temperature 18) Nch Driver Output Current vs. VDS
-VDET=3.4V
0.40
0.38
0.36
0.34
0.32
0.30
0.28
0.26
0.24
0.22
0.20
6.0
5.0
4.0
3.0
2.0
1.0
0.0
V
OUT=3.4V
3.0V
2.5V
2.0V
-40 -25 -10
5
20 35 50 65 80 95 110 125
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Temperature Topt(°C)
VDS(V)
19) Nch Driver Output Current vs. VGS
-VDET=3.4V,RESET=0.05V
0.30
0.25
-40°C
0.20
0.15
25°C
0.10
85°C
0.05
125°C
0.00
0.0
1.0
2.0
3.0
4.0
5.0
V
GS(V)
16
R5104V
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
17
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 awarded ISO 14001 certification.
■
Ricoh presented with the Japan Management Quality Award for 1999.
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.
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http://www.ricoh.com/LSI/
RICOH COMPANY, LTD.
Electronic Devices Company
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