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MITSUMI
1423
765
SOP-7
SIP-5
12345
MITSUMI
Regulator+Reset IC MM1437
Regulator+Reset IC
Monolithic IC MM1437
Outline
This IC combines a low saturation 5V regulator, adapted for low power consumption, and a reset function
(regulator output monitoring), for which there is significant market need, that uses the built-in 4.2V detection
delay circuit.
Features
1. Small input/output voltage difference 0.25V typ.
2. High input voltage 18V max.
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.
Package
SOP-7
SIP-5
Applications
TV, monitors, air conditioners, others.
Pin Assignment
1 GND
2 RESET
3 Cd
4 V
5 VOUT
6 GND
7 N.C
---------------------------------------------------------------------------------------
IN
_
1
2 Cd
3 V
4 VOUT
5 GND
__
RESET
IN
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Equivalent Circuit Diagram
Pin Description
Regulator+Reset IC MM1437
Pin No.
1 (SOP-7)
-
5 (SIP
5)
2 (SOP-7)
1 (SIP
-
5) VOUT pin voltage detection output pin
3 (SOP-7)
2 (SIP
-
5)
Pin name
Functions
GND GND pin
------------------------------------------------------------------------------
RESET
Output pin voltage detection output
------------------------------------------------------------------------------
RESET
pin logic
V
OUT<Vs L
V
OUT>Vs H
–––
RESET
Cd Delay time capacitor pin
------------------------------------------------------------------------------
RESET
pin output delay time
can be set by the capacitance
connected to the Cd pin.
PLH= 100000 · C
t
t
PLH: transmission delay time [S]
C: capacitor value [F]
Equivalent circuit diagram
(SOP-7)
4
-
3 (SIP
5)
5 (SOP-7)
-
4 (SIP
5)
6 (SOP-7)
7
(SOP-7)
VIN Voltage supply input pin
VOUT Regulator output pin
GND GND pin
N.C
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Absolute Maximum Ratings
Item Symbol Ratings Unit
Operating temperature T
OPR
Regulator+Reset IC MM1437
-
20~+85 °C
Storage temperature T
Supply voltage V
Output current I
Power dissipation Pd 650
Note: *When mounted on a 55 20 mm paper phenol board (SOP-7)
When mounted on a 45 45 mm paper phenol board (SIP-5)
Recommended Operating Conditions
Item Symbol Ratings Unit
Operating temperature T
Output current I
Operating voltage V
Electrical Characteristics
Item Symbol Measurement conditions Min. Typ. Max. Unit
(Except where noted otherwise, Ta=25°C)
STG
CC
OUT 200 mA
OP
OP 0~150 mA
OP 2~16 V
-
40~+125 °C
-
0.3~+18 V
*
-
20~+85 °C
mW
No-load input current 1 Iccq1 V
No-load input current 2 Iccq2 V
IN=6V IOUT=0mA 400 800 µA
IN=4V IOUT=0mA 2.5 mA
Regulator
Output voltage V
Input-output differential voltage
Line regulation V1 V
Load regulation V2 V
Vo temperature
coefficient
1 VIN=6V IOUT=30mA
*
Ripple rejection *1 RR
Output noise voltage
1 Vn VIN=6V, f=20~80kHz IOUT=30mA 200 400
*
OUT VIN=6V IOUT=30mA 4.90 5.00 5.10 V
Vi0 VIN=4.8V IOUT=150 mA 0.25 0.50 V
IN=6V~10V IOUT=30mA 10 30 mV
IN=6V IOUT=0~150mA 40 80 mV
Tj=-20~+85°C
V
OUT
/ T
V
IN=6V f=120Hz
100
50 60 dB
V
RIPPLE=1VP-P, IOUT=30mA
Reset
Detecting voltage VS V
Vs temperature coefficient *1
VS/ T Tj=-20~+85°C 100
IN=H L 4.03 4.2 4.37 V
Hysteresis voltage VS VOUT=H L H 25 50 100 mV
Low-level output voltage V
--------------------------------------------------------------------------------
RESET
delay time tPLH Cd=0.1µF 5 10 15 mS
OL VOUT=3.9V 100 200 mV
ppm/°C
µVrms
ppm/°C
"L" transmission delay time *1
Threshold operating voltage V
Note 1: design guaranteed
tPHL Cd=0.1µF 30 90 µS
OPL VOL=0.4V 0.65 0.85 V
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Measuring Circuit
Application Circuit
Regulator+Reset IC MM1437
Note 1 : This regulator is not internally compensated and thus requires an external output-capacitor (C
stability.
Note 2 : RESET
------------------------------------------------------------------------------------------------------------------------
-
terminal with a built-in pull-up resistance (10kΩ).
OUT
) for
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tPLH tPLH
0V
5V
0V
VS
5V
0V
5V
10V
V
IN
VOUT
RESET
VS
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Timing Chart
Regulator+Reset IC MM1437
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Input Voltage (V)
6
5
4
3
2
1
0
01234567
VOUT
RESET
Output voltage (V)
Input Voltage (V)
3
2.5
2
1.5
1
0.5
0
024 6810121416
Quiescent current (mA)
Input voltage (V)
30
20
10
0
-
10
-
20
-
30
4 6 8 10121416
Line regulation (mV)
Output current (mA)
60
40
20
0
-
20
-
40
-
60
0 50 100 150
Load regulation (mV)
Frequency (HZ)
100
90
80
70
60
50
40
30
20
10
0
10 100 1000 10000 100000
Ripple rejection (dB)
Output current (mA)
6
5
4
3
2
1
0
0 50 100 150 200 250 300
Output voltage (V)
Cd-capacitor (µF)
100
10
1
0.01 0.1 1
Deyal time (mS)
Temperature (°C)
800
700
600
500
400
300
200
100
0
-
25 0 25 50 75 100 125
Allowable loss (mW)
On board 55 22mm (SOP)/45 45mm (SIP)
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Characteristics
Regulator+Reset IC MM1437
Detection voltage (IOUT=0mA)
Line regulation
Quiescent current (IOUT=0mA)
Load regulation
Ripple rejection
RESET delay time
Current limit
Allowable loss
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