12345
n
OUTLINE
‘99.12.3
Microprocessor power management with Watchdog Timer
R5101G Series
The R5101G Series are microprocessor power management ICs with high accuracy output voltage and
detector threshold and with ultra low supply current by CMOS process. Each of these ICs consists of a voltage
regulator, a voltage detector and a watchdog timer. Thus, the R5101G 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 internal driver transistor can supply typically 50mA current to a system
when the voltage difference between input and output is 2V. 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(C
D
).
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 time period for watching and holding a reset signal of the watchdog timer can also be set individually
by an external capacitor(C
TW
).
n
FEATURES
l
Built-in a watchdog timer
l
Time period for monitoring and generating a reset signal of the watchdog timer can be set by an external
capacitor
l
Watchdog timer can be stopped individually by CE Pin
l
Low supply current
· · · · · · · · · · · · · · · · · · · · · · ·TYP.
5µA
l
The output voltage of Voltage Regulator and the detector threshold voltage can be set individually with a step
of 0.1V for each IC by laser trim
l
High Accuracy Output Voltage of Voltage Regulator and Detector Threshold
· · · ·
±2.5%
l
Power-on Reset Delay Time can be set by an external capacitor
l
Output Current
· · · · · · ·
Typ. 50mA (at Vin - Vout = 2V)
l
Small Package
· · ·
Ultra-mini SSOP-8G (0.65mm pitch ) Refer to Package Dimensions
n
APPLICATION
l
Power source for microprocessors
n
PIN CONFIGURATION
SSOP8G(0.65mm pitch)
SCK
C
D
C
TW
V
DD
Reset
CE
GND
V
OUT
12345
Rev. 1.10
-1-
n
PIN DESCRIPTION
Pin No. Symbol
1
2
3
4
5
6
7
8
SCK
CD
CTW
V
DD
V
OUT
GND
CE
Clock Input Pin from Microprocessor
External Capacitor Pin for Setting Delay Time of Voltage Detector
External Capacitor Pin for Setting Monitoring Time and Reset Time of Watchdog timer
Power supply Pin
Output Pin for Voltage Regulator
Ground Pin
Control Switch Pin for Watchdog timer ( "H" active, "L" inactive)
Description
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. )
n
ABSOLUTE MAXIMUM RATINGS
Symbol
V
DD
V
CD
V
CTW
V
OUT
V
RESET
V
CE
V
SCK
I
OUT
I
RESET
P
D
T
opt
T
stg
Item
Supply Voltage
Output Voltage
Voltage of CD Pin
Voltage of CTW Pin
Voltage of V
OUT
Pin
Voltage of RESET Pin
Voltage of CE Pin
Voltage of SCK Pin
Current of V
OUT
Pin
Current of RESET Pin
Input Voltage
Output Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Topt=25
°
C, Vss=0V
Rating
Unit
-0.3
~
12
V
V
ss
-0.3
~
V
DD
+0.3
V
V
ss
-0.3
~
V
DD
+0.3
V
V
ss
-0.3
~
V
DD
+0.3
V
V
ss
-0.3
~
12
V
V
ss
-0.3
~
V
DD
+0.3
V
V
ss
-0.3
~
V
DD
+0.3
V
150
mA
10
mA
300
mW
-40
~
+85
°
C
-55
~
+125
°
C
12345
Rev. 1.10
-3-
n
ELECTRICAL CHARACTERISTICS
l
R5101G001A
Symbol
V
DD
Iss-On
Iss-Off
V
OUT
I
OUT
V
DIF
D
V
OUT
/
D
I
OUT
D
V
OUT
/
D
V
DD
Ilim
D
V
OUT
/
D
Topt
-V
DET
V
HYS
V
DETMGN
D
-V
DET
/
D
Topt
Item
Operating Voltage
Supply Current (WDT active)
Supply Current (WDT inactive)
Output Voltage
Output Current
Dropout Voltage
Load Regulation
Line Regulation
Current Limit (Short mode)
Output Voltage Temperature
Coefficient
Detector Threshold
Hysteresis Range
Regulator Voltage Margin against
Released Voltage
Detector Threshold
Temperature Coefficient
Reset Delay Time
Watch Time of WDT
Reset Hold Time of WDT
SCK Input Voltage " H "
SCK Input Voltage " L "
CE Input Voltage " H "
CE Input Voltage " L "
SCK Input Current " H "
SCK Input Current " L "
CE Pull-up Resistance
CD Pin Output Current
CTW Pin Output Current
RESET Pin Output Current
RESET Pin Leakage Current
SCK Input Pulse Width
Minimum Operating Voltage of Voltage Detector
Conditions
V
DD
=CE=5.0V
V
DD
=5.0V, CE=GND
V
DD
=5.0V,I
OUT
=10mA
V
DD
=5.0V
I
OUT
=30mA
V
DD
=5.0V
1mA
£
I
OUT£
50mA
I
OUT
=10mA
V
OUT
+0.5V
£
V
DD
£
10V
V
OUT
=0V
I
OUT
=10mA
-40
°
C
£
Topt
£
85
°
C
MIN.
2.925
100
150
Topt=25
°
C
TYP.
MAX.
Unit
10
V
5
15
m
A
6
18
m
A
3.000 3.075
V
mA
500
850
mV
50
100
mV
0.1
0.2
100
%/V
mA
ppm/
°
C
V
V
V
ppm/
°
C
ms
ms
ms
V
V
V
V
m
A
m
A
M
W
mA
mA
mA
m
A
ns
V
10
50
±
100
2.700
0.135
V
OUT
-((-V
DET
)+V
HYS
),
I
OUT
=10mA
-40
°
C
£
Topt
£
85
°
C
V
DD
=5.0V, CD=0.001
m
F
V
DD
=5.0V, CW=0.01
m
F
V
DD
=5.0V, CW=0.01
m
F
V
DD
=5.0V
V
DD
=5.0V
2.633
0.081
0.02
2.767
0.189
±
100
tpr
twd
twr
V
IHSCK
V
ILSCK
V
IHCE
V
ILCE
I
IHSCK
I
ILSCK
Rpu
I
CD
I
CTW
I
RESET
Ileak
tsckw
Vstart
V
DD
=SCK=5.0V
V
DD
=5.0V, SCK=GND
V
DD
=1.3V,V
DS
=0.5V
V
DD
=1.3V,V
DS
=0.5V
V
DD
=1.3V,V
DS
=0.5V
VDD=10.0V,CE=GND,VDS=12.0V
V
DD
=5.0V, CW=0.01
m
F
7
50
5
0.8
´
V
OUT
0
1.2
0
-1
-1
2
1
1
1
-1
500
14
100
10
4
2
2
2
21
150
15
V
DD
0.2
´
V
OUT
V
DD
0.2
1
1
10
1
0.9
1.3
12345
Rev. 1.10
-4-
l
R5101G002A
Symbol
V
DD
Iss-On
Iss-Off
V
OUT
I
OUT
V
DIF
D
V
OUT
/
D
I
OUT
D
V
OUT
/
D
V
DD
Ilim
D
V
OUT
/
D
Topt
Item
Operating Voltage
Supply Current (WDT active)
Supply Current (WDT inactive)
Output Voltage
Output Current
Dropout Voltage
Load Regulation
Line Regulation
Current Limit (Short mode)
Output Voltage Temperature
Coefficient
Detector Threshold
Hysteresis Range
Regulator Voltage Margin
against Released Voltage
Detector Threshold
Temperature Coefficient
Reset Delay Time
Watch Time of WDT
Reset Hold Time of WDT
SCK Input Voltage " H "
SCK Input Voltage " L "
CE Input Voltage " H "
CE Input Voltage " L "
SCK Input Current " H "
SCK Input Current " L "
CE Pull-up Resistance
CD Pin Output Current
CTW Pin Output Current
RESET Pin Output Current
RESET Pin Leakage Current
SCK Input Pulse Width
Minimum Operating Voltage of
Voltage Detector
Conditions
V
DD
=CE5.3V
V
DD
=5.3V, CE=GND
V
DD
=5.3V, I
OUT
=10mA
V
DD
=5.3V
I
OUT
=30mA
V
DD
=5.3V
1mA
£
I
OUT£
50mA
I
OUT
=10mA
V
OUT
+0.5V
£
V
DD
£
10V
V
OUT
=0V
I
OUT
=10mA
-40
°
C
£
Topt
£
85
°
C
MIN.
3.218
50
100
Topt=25
°
C
TYP.
MAX.
Unit
10
V
5
15
m
A
6
18
m
A
3.300
3.382
V
mA
500
650
mV
50
100
mV
0.1
0.2
100
%/V
mA
ppm/
°
C
V
V
V
±
100
10
50
±
100
-V
DET
V
HYS
V
DETMGN
D
-V
DET
/
D
Topt
2.925
0.090
V
OUT
-((-V
DET
)+V
HYS
),
I
OUT
=10mA
-40
°
C
£
Topt
£
85
°
C
V
DD
=5.3V, CD=0.001
m
F
V
DD
=5.3V, CW=0.01
m
F
V
DD
=5.3V, CW=0.01
m
F
V
DD
=5.3V
V
DD
=5.3V
0.02
3.000
0.150
3.075
0.210
tpr
twd
twr
V
IHSCK
V
ILSCK
V
IHCE
V
ILCE
I
IHSCK
I
ILSCK
Rpu
I
CD
I
CTW
I
RESET
Ileak
tsckw
Vstart
7
50
5
0.8
´
V
OUT
0
1.2
0
14
100
10
21
150
15
V
DD
0.2
´
V
OUT
V
DD
0.2
1
1
ppm/
°
C
ms
ms
ms
V
V
V
V
m
A
m
A
V
DD
=SCK=5.3V
V
DD
=5.3V, SCK=GND
V
DD
=1.3V,V
DS
=0.5V
V
DD
=1.3V,V
DS
=0.5V
V
DD
=1.3V,V
DS
=0.5V
VDD=10.0V,CE=GND,VDS=12.0V
-1
-1
4
1
1
1
-1
500
0.9
2
2
2
M
W
mA
mA
mA
1
1.3
m
A
V
DD
=5.3V, SCK=GND
ns
V
12345
Rev. 1.10
-5-
京公网安备 11010802033920号
EEWORLD
