R5101G001A RICOH [RICOH electronics devices division], R5101G001A Datasheet

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R5101G001A

Manufacturer Part Number
R5101G001A
Description
Microprocessor power management with Watchdog Timer
Manufacturer
RICOH [RICOH electronics devices division]
Datasheet

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n OUTLINE
n FEATURES
n APPLICATION
n PIN CONFIGURATION
Rev. 1.10
12345
l Power source for microprocessors
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
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
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
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.
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.
capacitor(C
generates reset signals intermittently to prevent a whole system from being malfunction.
by an external capacitor(C
l Output Current · · · · · · · Typ. 50mA (at Vin - Vout = 2V)
l Small Package · · · Ultra-mini SSOP-8G (0.65mm pitch ) Refer to Package Dimensions
SCK
C
The built-in voltage regulator with an internal driver transistor can supply typically 50mA current to a system
The built-in voltage detector has an output delay function and the delay time can be set by an external
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
The time period for watching and holding a reset signal of the watchdog timer can also be set individually
The R5101G Series are microprocessor power management ICs with high accuracy output voltage and
C
V
capacitor
of 0.1V for each IC by laser trim
TW
D
DD
D
).
SSOP8G(0.65mm pitch)
TW
).
V
Reset
CE
GND
OUT
- 1 -
Microprocessor power management with Watchdog Timer
R5101G Series
12345
‘99.12.3

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R5101G001A Summary of contents

Page 1

OUTLINE 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 ...

Page 2

PACKAGE DIMENSIONS SSOP8G n BLOCK DIAGRAMS 8 RESET 12345 Rev. 1.10 0.65 2.9±0 Vref2 + - - + - 2 - Unit : mm Level Shift 1 SCK 4 ...

Page 3

PIN DESCRIPTION Pin No. Symbol 1 SCK Clock Input Pin from Microprocessor 2 CD External Capacitor Pin for Setting Delay Time of Voltage Detector 3 CTW External Capacitor Pin for Setting Monitoring Time and Reset Time of Watchdog timer ...

Page 4

... ELECTRICAL CHARACTERISTICS l R5101G001A Symbol Item V Operating Voltage DD Iss-On Supply Current (WDT active) Iss-Off Supply Current (WDT inactive) V Output Voltage OUT I Output Current OUT V Dropout Voltage DIF Load Regulation OUT D I OUT Line Regulation OUT Ilim Current Limit (Short mode) ...

Page 5

R5101G002A Symbol Item V Operating Voltage DD Iss-On Supply Current (WDT active) Iss-Off Supply Current (WDT inactive) V Output Voltage OUT I Output Current OUT V Dropout Voltage DIF Load Regulation OUT D I OUT D ...

Page 6

R5101G003A Symbol Item V Operating Voltage DD Iss-On Supply Current (WDT active) Iss-Off Supply Current (WDT inactive) V Output Voltage OUT I Output Current OUT V Dropout Voltage DIF Load Regulation OUT D I OUT D ...

Page 7

R5101G004A Symbol Item V Operating Voltage DD Iss-On Supply Current (WDT active) Iss-Off Supply Current (WDT inactive) V Output Voltage OUT I Output Current OUT V Dropout Voltage DIF Load Regulation OUT D I OUT D ...

Page 8

R5101G005A Symbol Item V Operating Voltage DD Iss-On Supply Current (WDT active) Iss-Off Supply Current (WDT inactive) V Output Voltage OUT I Output Current OUT V Dropout Voltage DIF Load Regulation OUT D I OUT D ...

Page 9

TYPICAL APPLICATION SCK C D(0.001mF (0.01mF) W 1mF n TECHNICAL NOTES Use 0.01mF or more value of an external capacitor, CW for setting monitoring time of watchdog timer. Use ...

Page 10

OPERATION DIAGRAM V DD Vstart +Vdet -Vdet Detector Threshold Hysteresis V OUT tpr Vref2H CD twd Vref2H CTW Vref2L tsckw SCK CE RESET ¬ - ® ¯ ° ° 12345 Rev. 1.10 twr ± ² ± ² ° ³ ...

Page 11

OPERATION ¬ When V is turned on and Input Voltage reaches Vstart (nearly equal 0.8V), the output of RESET pin DD becomes “L” level External Capacitor starts to be charged through the C Regulator crosses ...

Page 12

TEST CIRCUITS Test Circuit of Supply Current RESET SCK CE CD GND CTW V V OUT Test Circuit of Detector Threshold(V 470k RESET CE GND V OUT 12345 Rev. 1. Test Circuit of ...

Page 13

Test Circuit of SCK Input Current RESET SCK CE CD GND CTW V V OUT Test Circuit of RESET Output leakage Current RESET SCK CE CD GND CTW V V OUT A Rev. 1. Test Circuit of Minimum ...

Page 14

... Output Voltage vs. Output Current R5101G001A 3.5 3.0 2.5 2.0 °C 85 1.5 1.0 0.5 0 100 Output Current I 2) Output Voltage vs. Input Voltage R5101G001A 3.2 3.1 0mA 3.0 30mA 2.9 10mA 2 Input Voltage V 3) Dropout Voltage vs. Output Current R5101G001A 1.0 0.8 °C 85 0.6 0.4 0.2 0 Output Current I 12345 Rev. 1.10 V =5V DD 6.0 5.0 4.0 °C 3.0 -40 2.0 °C 25 1.0 0.0 150 200 (mA) OUT ° ...

Page 15

... Output Voltage vs. Temperature R5101G001A 3.10 3.05 3.00 2.95 2.90 -50 - Temperature Topt 5) RESET Pin Voltage vs. Input Voltage R5101G001A Pull-up 510k 3.0 2.5 2.0 1.5 °C -40 1.0 °C 85 0.5 °C 25 0.0 0.0 0.5 1.0 1.5 Input Voltage Pin Output Current vs. Input Voltage R5101G001A -40 6 ° Input Voltage V Rev. 1.10 V =5V DD 5.10 5.05 5.00 4.95 4. 100 (°C) 6) Detector Threshold vs ...

Page 16

... External Capacitance of Ctw Pin 100000 10000 1000 100 10 1 0.1 1.E-07 1.E-06 1.E- R5101G001A -50 - (°C) Temperature Topt R5101G001A -50 - (°C) Temperature Topt twd twr 1.E-07 External Capacitance of CTW Pin(F) 75 100 75 100 1.E-06 ...

Page 17

... Topt= (V) DD 19) Supply Current vs. Temperature (WDT OFF) °C Topt= ( R5101G001A -50 - Temperature Topt (°C) R5101G001A -50 - Temperature Topt 12345 V = 100 V = 100 (°C) ...

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