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PDF R5104V Data sheet ( Hoja de datos )
| Número de pieza | R5104V | |
| Descripción | Microprocessor power management | |
| Fabricantes | RICOH | |
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R5104V SERIES
Microprocessor power management with Watchdog Timer
NO.EA-136-070201
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
• Low 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
• Small Package ............................................... SSOP-10
APPLICATION
• Power source for microprocessors
1
1 page  
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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
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
VR part
Symbol
CE Input Voltage “L”
Item
Conditions
0.00
0.25 V
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
∆VOUT/∆IOUT Load Regulation(*1)
VIN=12V,1mA <= IOUT <= 1A
15 60 mV
∆VOUT/
∆VIN
Line Regulation(*1)
IOUT=100mA
VOUT+1V <= VIN <= 36V
0.05 0.10 %/V
∆VOUT/
∆Topt
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
VHYS
∆-VDET/
∆Topt
VTCD
ICD
VINL
WDT part
Symbol
Detector Threshold
Hysteresis Range
Detector Threshold Temperature
Coefficient
CD pin detector threshold
Internal Current value for
Delay Time Setting
Minimum Operating Voltage
-40°C <= Topt <= 125°C
VOUT pin voltage
Item
Conditions
×0.98
(-VDET)
×0.01
(-VDET)
×0.02
×1.02
(-VDET)
×0.03
V
V
±50 ppm/°C
2.35 2.50 2.65
V
0.12 0.30 0.47 µA
2.0 V
Min. Typ. Max. Unit
tWD
tWR
VIHSCK
VILSCK
Watchdog Timeout period
Reset Hold Time of WDT
SCK Input Voltage “H”
SCK Input Voltage “L”
CTW=0.1µF
CTW=0.1µF
200 300 510 ms
35 70 120 ms
0.8×VOUT
VDD+0.3 V
0.0 0.1 V
TSCKW
SCK Input Pulse Width
-VDET >= 3.0V
-VDET <= 2.9V
500
5000
ns
5
5 Page 
TEST CIRCUITS
Standard Test Circuit
VIN
IOUT
COUT
VDD
CE
ISENSE RESET
EXT
CTW
VOUT
CD
SCK
GND
CD
CCTW
CIN
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R5104V
Test Circuit of Supply Current
VIN
A
COUT
VDD CE
ISENSE RESET
EXT
CTW
VOUT
CD
SCK
GND
CCTW
Test Circuit of Standby Current
VIN
A
COUT
VDD CE
ISENSE RESET
EXT
VOUT
CTW
CD
CCTW
SCK
GND
Test Circuit of EXT Sink Current
VIN
VOUT
VDD
ISENSE
A EXT
COUT
VOUT
SCK
CE
RESET
CIN
CTW
CD
CCTW
GND
Test Circuit of Ripple Rejection
IOUT
Vp
COUT
VDD CE
ISENSE RESET
EXT
CTW
VOUT
CD
SCK
GND
VIN
Vp
P.G.
CCTW
11
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| PDF Descargar | [ Datasheet R5104V.PDF ] | |
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