MITSUMI MM1482

IC for Regulator+Reset MM1482
MITSUMI
IC for Regulator+Reset
Monolithic IC MM1482
June 23, 1999
Outline
This IC, developed for use in CD-ROM drives, combines a 3V regulator adapted to low power consumption
with a much-sought reset function (regulator input monitoring), with internal delay circuit, set to detect 4.2V.
Features
1. Large output current
300mA max.
2. High ripple rejection rate
80dB typ.
3. Internal thermal shutdown circuit.
4. Internal current-limiting circuit.
5. Adjustment-free reset detection voltage
4.2V typ.
6. Easy to set delay time from voltage detection to reset release.
7. Operating temperature range and ripple elimination rate are available separately for 3 ranks.
Package
SOP-8D
Applications
1. CD-ROM drive
2. Optical disc drivers
Pin Assignment
8
7
6
5
1
2
3
4
SOP-8D
(TOP VIEW)
Equivalent Circuit Diagram
1
2
3
4
5
6
7
8
N. C
RESET
Cf
VIN
VOUT
N. C
GND
Cd
---------------------------------------------------------------------
IC for Regulator+Reset MM1482
MITSUMI
Pin Description
Pin No. Pin name
1
Functions
Equivalent circuit diagram
N. C
---------------------------------------------------------------------
2
RESET VIN pin voltage detection output
---------------------------------------------------------------------
RESET pin logic
3
Cf
_
_
RESET
VIN<VS
L
VIN>VS
H
Ripple-filter pin (RESET)
Please connect a capacitor between Cf-GND
to reject ripple voltage of VIN for RESET. It
become C-R low-pass filter. Internal
impedance of Cf is typically 14kΩ.
Voltage supply input pin
4
VIN
5
VOUT
6
N. C
7
GND
8
Cd
Regulator Output pin
GND pin
Delay time capacitor pin
RESET pin output delay time can be set by
the capacitance connected to the Cd pin.
tPLH=100000·C
tPLH: transmission delay time [s]
C: capacitor value [F]
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Operating temperature 1
TOPR
-30~+85
°C
Storage temperature
TSTG
-40~+125
°C
Supply voltage
VIN
-0.3~+10
V
Output current
IOUT
400
mA
Power dissipation
Pd
400(Alone)*
mW
*
Note1:
Note2:
950(With board mounted)*2
*1 Rank B: -20 ~+80°C ; Rank A: -30 ~ +85°C
*2 When mounted on a (Copper foil area 80% 192
142 1t mm glass epoxy board.
IC for Regulator+Reset MM1482
MITSUMI
Recommended Operating Conditions
(Typical model MM1482C) (Except where noted otherwise, Ta=25°C)
Item
Symbol
Ratings
Unit
Operating temperature
TOP
-20~+85
°C
Output current
IOP
0~300
mA
Operating voltage
VOP
0~10
V
Note1:
*1 Rank B:
-20 ~+80°C ; Rank A: -30 ~ +85°C
Electrical Characteristics
(Typical model 1482C) (Except where noted otherwise, Ta=25°C, VCONT=1.6V)
(Except where noted otherwise, resistance unit is Ω)
Item
Symbol
No-Load Input Current
Iccgl
Measurement conditions
Min. Typ. Max. Unit
VIN=5V IOUT=0mA C rank
2.2
4
mA
A, B rank
3.0
6.0
mA
3.30
3.37
V
Regulator
Output Voltage
VOUT
VIN=5V IOUT =30mA
Input-Output differential Voltage
ViO
VIN=3.2V IOUT=150mA
0.15
0.3
V
3.23
Line Regulation
V1
VIN=4.4V~5.5V IOUT=30mA
0.05
5
mV
Load Regulation
V2
VIN=5V IOUT=0mA~300mA
20
120
mV
VOUT Temperature Coefficient
1
*
VOUT/ T
Tj=-20~+80°C
VIN=5V f=120Hz VRIPPLE=1VP-P
Ripple Rejection
RR
*1
100
ppm/°C
50
80
dB
50
90
dB
VIN=5V IOUT=30mA
IOUT=30mA C rank
A, B rank
VIN=5V, f=20~80kHz
Output Noise Voltage
1
*
Vn
IOUT=30mA C rank
A, B rank
60
120
µVrms
40
120
µVrms
4.20
4.29
V
Reset
Vs
Detecting Voltage
Vs temperature Coefficient
*1
Vs/ T
Vs
Hysteresis Voltage
VIN=H
L
4.11
Tj=20~80°C
VIN=H
L
H
100
100
ppm/°C
200
mV
200
mV
±0.1
µA
Low-Level Output Voltage
VOL
VIN=3.9V RL=4.7k
Output Leakage Current
IOH
VIN=5V
Output Current when ON 1
IOL
VIN=3.9V, RL=0
5
mA
IOL
VIN=3.9V, RL=0 Ta=-20~+80°C
3
mA
tPLH
Cd Pin=open
Output Current when ON 2
"H"Transmission Delay Time
Reset Delay Time
*1
*1
tPLH1
*1
VIN=4V
5V, Cd=0.1µF
100
5
30
90
µs
10
20
ms
*1
tPHL
Cd pin=open
30
90
µs
Threshold Operating Voltage
VOPL
VOL=0.4V
0.65
0.85
V
Cf terminal impedance
RCF
VIN=5V
14
"L"Transmission Delay Time
Note 1: design guaranteed
kΩ
MITSUMI
IC for Regulator+Reset MM1482
Measuring Circuit
Application Circuit
Note 1 : This regulator is not internally compensated and thus requires an external output-capacitor (COUT) for
stability.
Note 2 : Please be careful with regard to set wiring and temperature-related capacitor changes that may cause
oscillation.
IC for Regulator+Reset MM1482
MITSUMI
Timing Chart
VIN.
5V
Vs
Vs
0V
VOUT
5V
0V
tPLH1
RESET 5V
0V
IC for Regulator+Reset MM1482
MITSUMI
Characteristics
(Typical model MM1482C)
Regulator Output
Output voltage vs temperature
Output voltage (V)
Output voltage (V)
5
4
3
2
1
0
1
2
3
4
5
3.4
3.38
3.36
3.34
3.32
3.3
3.28
3.26
3.24
3.22
3.2
-25
0
25
Input voltage(V)
4
5
6
7
8
9
-10
-20
-30
0
50
100
150
200
Reset Output
5
Output voltage (V)
Rpple rejection (dB)
300
0
Output current (mA)
4
3
2
1
0
100
1000
10000
100000
1
Output voltage (V)
800
600
400
200
25
50
3
4
5
Detecting voltage vs temperature
On board 192 142 1.2tmm
1000
2
Input voltage(V)
Power Dissipation
Power Dissipation (mV)
250
10
Frequency (Hz)
0
125
20
10
Ripple rejection
0
100
30
Input voltage (V)
100
90
80
70
60
50
40
30
20
10
0
10
75
Load regulation
Load regulation (mV)
Line regulation (mV)
Line regulation
20
15
10
5
0
-5
-10
-15
-20
50
Temperature (°C)
75
100
Temperature (°C)
125
150
4.3
4.28
4.26
4.24
4.22
4.2
4.18
4.16
4.14
4.12
4.1
-25
0
25
50
75
Temperature (°C)
100
125