Mitsubishi M62055FP Datasheet
3V POWER SUPPLY with WATCHDOG TIMER
GENERAL DESCRIPTION
M62055FP is a 3V power supply featuring a watchdog
timer function for a microcontroller system.
It can be a power source of 3V ± 5% by utilizing the
reference voltage and amplifier.
It can also generate a reset pulse for the applied
systems during power-on, moreover it includes the
watchdog timer for a self diagnostics of the system,
which can prevent system erroneous functions.
FEATURES
• Power-on reset
• Watchdock timer
• High accuracy voltage source of 3V ±5% (max)
• Overcurrent protection circuit
• The voltage detection accuracy of ±5% (max)
• Output power (Vo) cutoff function at erroneous
conditions
• Backward voltage protection circuits for inputs and
outputs
MITSUBISHI<Dig./Ana.INTERFACE>
M62055FP
PIN CONFIGURATION(TOP VIEW)
GND
WD
RESET
Outline 8P2S
M62055FP
Vcc
CLM
VDDTC
VOC
APPLICATION
Handy information terminal equipment, CD-ROM, Portable audio
equipment.
BLOCK
DIAGRAM
Vcc
Vref
.
=1.25v
.
CLM
VOLTAGE DETECTOR
(CURRENT LIMITER)
RISE DELAY
(300µsec)
Vref
.
=1.5v
.
Vref
.
=1.5v
.
VD
Vcc
START
CIRCUIT
Set priority
Q
QRS
Reset
priority
Q
QRS
Reset
priority
Vcc
Vcc
Vcc
Reset priority
Vref
.
=0.9v
.
QRS
Q
The input and
output reversal
conservation circuit
RSQ
Q
56K
40K
Vref
=1.25v
Set priority
R Q
VO
Note ; It indicates Vo,
QS
unless otherwise noted
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TCWDGND
RESET
970508
Pin Functional description
MITSUBISHI<Dig./Ana.INTERFACE>
M62055FP
3V POWER SUPPLY with WATCHDOG TIMER
pin number
3
4 Reset signal output
ABSOLUTE MAXIMUM RATINGS
symbol Parameter conditions Ratings Unit
Vcc
VRM
IRM
VWDM
Topr
supply voltage
Reset pin
Watchdock pin input voltage
Ko
Thermal derating
Operating temperature
Storage temperature
symbol Functional description
GND1
WD2
TC
RESET
VO5 Feedback to a power supply for a MCU.
VD6
CLM7 Current limiting
Vcc8 Power supply voltage
Output voltage
Output current
Ground
Input for watchdock timer.
Setting up reset timer and watchdock timer.
Controlling the stability of an output voltage with a PNP transistor
connected externally.
(Ta=25°C, Unless otherwise noted)
Ta ≥ 25°C
13
10
10
3
4.0
- 20 ~ + 75
- 55 ~ + 150
mA
mW/°C
°C
°CTstg
V
V
V
MITSUBISHI
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970508
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