R5101G SERIES
Microprocessor power management with Watchdog Timer
NO. EA-071-130424
OUTLINE
The R5101G Series are CMOS-based µ con 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 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 timeout periods for watchdog and reset can also be set individually by an external capacitor (C
TW
).
FEATURES
•
•
•
•
•
•
•
•
•
•
•
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
Supply Current................................................................. Typ. 5µA
Output Voltage Range .....................................................1.8V to 5.0V (0.1V step)
Output Voltage Accuracy .................................................±2.5%
Detector Threshold Range...............................................1.7V to 4.5V (0.1V step)
Detector Threshold Accuracy...........................................±2.5%
Power-on Reset Delay Time can be set by an external capacitor
Output Current ................................................................. Typ. 50mA (at V
IN
−V
OUT
=2V)
Package........................................................................... SSOP-8G
APPLICATIONS
•
Power source for microprocessors
1
R5101G
BLOCK DIAGRAMS
R5101GxxxA
RESET 8
WDT
Level Shift
1 SCK
C
TW
3
CE 7
4 V
DD
5 V
OUT
Vref2
C
D
2
Vref1
6 GND
SELECTION GUIDE
The output voltage and the detector threshold for the ICs can be selected at the users’ request.
Product Name
R5101GxxxA-TR-FE
Package
SSOP-8G
Quantity per Reel
3,000 pcs
Pb Free
Yes
Halogen Free
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.)
2
R5101G
PIN CONFIGURATION
•
SSOP-8G
8 7 6 5
1 2 3 4
PIN DESCRIPTIONS
Pin No.
1
2
3
4
5
6
7
8
Symbol
SCK
C
D
C
TW
V
DD
V
OUT
GND
CE
RESET
Description
Clock Input Pin from Microprocessor
External Capacitor Pin for Setting Delay Time of Voltage Detector
External Capacitor Pin for Setting Reset and Watchdog Timeout Periods
Power supply Pin
Output Pin for Voltage Regulator
Ground Pin
Control Switch Pin for Watchdog timer ("H" active, "L" inactive)
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.)
3
R5101G
ABSOLUTE MAXIMUM RATINGS
Symbol
V
DD
V
CD
V
CTW
V
OUT
V
RESET
Topt=25°C, V
SS
=0V
Item
Supply Voltage
Voltage of C
D
Pin
Output Voltage
Voltage of C
TW
Pin
Voltage of V
OUT
Pin
Voltage of
RESET
Pin
Input Voltage
Output Current
Voltage of CE Pin
Voltage of SCK Pin
Current of V
OUT
Pin
Current of
RESET
Pin
∗
Rating
−0.3
to 12
V
SS
−0.3
to V
DD
+0.3
V
SS
−0.3
to V
DD
+0.3
V
SS
−0.3
to V
DD
+0.3
V
SS
−0.3
to 12
V
SS
−0.3
to V
DD
+0.3
V
SS
−0.3
to V
DD
+0.3
150
10
380
−40
to 85
−55
to 125
Unit
V
V
V
V
V
V
V
mA
mA
mW
°C
°C
V
CE
V
SCK
I
OUT
I
RESET
P
D
T
opt
T
stg
Power Dissipation (SSOP-8G)
Storage Temperature Range
Operating Temperature Range
∗
) 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
R5101G
ELECTRICAL CHARACTERISTICS
•
R5101GxxxA
Item
Operating Voltage
Supply Current (WDT active)
Supply Current (WDT inactive)
Output Voltage
Output Current
∗1
Topt=25°C
Symbol
V
DD
I
SS
-On
I
SS
-Off
V
OUT
I
OUT
V
DIF
ΔV
OUT
/
ΔI
OUT
ΔV
OUT
/
ΔV
DD
I
LIM
ΔV
OUT
/
ΔT
opt
-V
DET
V
HYS
V
DETMGN
Δ-V
DET
/
ΔT
opt
t
PR
t
WD
t
WR
V
IHSCK
Conditions
Min.
1.5
Typ.
Max.
10
Unit
V
µA
µA
V
mA
V
DD
=CE=V
OUT
+2.0V
V
DD
=V
OUT
+2.0V, CE=GND
V
DD
=V
OUT
+2.0V, I
OUT
=10mA
V
DD
=V
OUT
+2.0V
V
DD
=V
OUT
+2.0V, 1mA≤I
OUT
≤30mA
(In case that 3.0V≤V
OUT
≤5.0V,
1mA≤I
OUT
≤50mA)
I
OUT
=10mA
V
OUT
+0.5V≤V
DD
≤10V
V
OUT
=GND
I
OUT
=10mA
-40°C≤T
opt
≤85°C
×0.975
-V
DET
×0.03
V
OUT
-((-V
DET
)+V
HYS
), I
OUT
=10mA
-40°C≤T
opt
≤85°C
V
DD
=V
OUT
+2.0V, C
D
=0.001µF
V
DD
=V
OUT
+2.0V, C
W
=0.01µF
V
DD
=V
OUT
+2.0V, C
W
=0.01µF
V
DD
=V
OUT
+2.0V
1.8V≤V
OUT
≤2.9V
7
50
5
0.8
×V
OUT
0
0
1.2
0.0
V
DD
=SCK=V
OUT
+2.0V
V
DD
=V
OUT
+2.0V, SCK=GND
-1
-1
2
V
DD
=1.5V, V
DS
=0.5V
V
DD
=1.5V, V
DS
=0.5V
V
DD
=1.5V, V
DS
=0.5V
V
DD
=10.0V, CE=GND, V
DS
=10.0V
V
DD
=V
OUT
+2.0V
1
1
1
-1
500
0.02
10
×0.975
50
Refer to the following table
5
6
15
18
×1.025
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
Watchdog Timeout period
Reset Hold Time of WDT
SCK Input Voltage "H"
50
0.1
50
±100
100
0.2
100
mV
%/V
mA
ppm/
°C
-V
DET
×0.05
×1.025
-V
DET
×0.07
V
V
V
±100
14
120
12
35
250
25
V
DD
0.1
×V
OUT
0.2
×V
OUT
V
DD
0.2
1
1
4
2
2
2
1
10
ppm/
°C
ms
ms
ms
V
V
ILSCK
V
IHCE
V
ILCE
I
IHSCK
I
ILSCK
R
PU
I
CD
I
CTW
I
RESET
SCK Input Voltage "L"
CE Input Voltage "H"
CE Input Voltage "L"
SCK Input Current "H"
SCK Input Current "L"
CE Pull-up Resistance
C
D
Pin Output Current
C
TW
Pin Output Current
RESET
Pin Output Current
RESET
Pin Leakage Current
V
DD
=V
OUT
+2.0V
3.0V≤V
OUT
≤5.0V
V
V
V
µA
µA
MΩ
mA
mA
mA
µA
ns
I
leak
T
SCKW
SCK Input Pulse Width
5
