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
7
6
5
2
3
4
1
2
3
4
5
6
SOP-7
7
GND
---------------------------------------------------------------------------------------
RESET
Cd
V
IN
V
OUT
GND
N.C
___
1
2
1
2
3
SIP-5
4
5
3
4
5
RESET
Cd
V
IN
V
OUT
GND
MITSUMI
Regulator+Reset IC MM1437
Equivalent Circuit Diagram
Pin Description
Pin No.
1 (SOP-7)
5 (SIP-5)
Pin name
GND
------------------------------------------------------------------------------
Functions
GND pin
Output pin voltage detection output
V
OUT
pin voltage detection output pin
RESET pin logic
–
–
–
------------------------------------------------------------------------------
Equivalent circuit diagram
2 (SOP-7)
RESET
1 (SIP-5)
RESET
V
OUT
<Vs
V
OUT
>Vs
L
H
3 (SOP-7)
2 (SIP-5)
Cd
Delay time capacitor pin
------------------------------------------------------------------------------
RESET pin output delay time
can be set by the capacitance
connected to the Cd pin.
t
PLH
= 100000 · C
t
PLH
: transmission delay time [S]
C: capacitor value [F]
4 (SOP-7)
3 (SIP-5)
5 (SOP-7)
4 (SIP-5)
6 (SOP-7)
7 (SOP-7)
V
IN
V
OUT
GND
N.C
Voltage supply input pin
Regulator output pin
GND pin
MITSUMI
Regulator+Reset IC MM1437
Absolute Maximum Ratings
Item
Operating temperature
Storage temperature
Supply voltage
Output current
Power dissipation
Note:
Symbol
T
OPR
T
STG
V
CC
I
OUT
Pd
Ratings
-20~+85
-40~+125
-0.3~+18
200
650
*
Unit
°C
°C
V
mA
mW
*
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
Operating temperature
Output current
Operating voltage
Symbol
T
OP
I
OP
V
OP
Ratings
-20~+85
0~150
2~16
Unit
°C
mA
V
Electrical Characteristics
Item
No-load input current 1
No-load input current 2
Regulator
Output voltage
Input-output differential voltage
Line regulation
Load regulation
Vo temperature
coefficient
(Except where noted otherwise, Ta=25°C)
Measurement conditions
V
IN
=6V I
OUT
=0mA
V
IN
=4V I
OUT
=0mA
V
IN
=6V I
OUT
=30mA
V
IN
=4.8V I
OUT
=150 mA
V
IN
=6V~10V I
OUT
=30mA
V
IN
=6V I
OUT
=0~150mA
Tj=-20~+85°C
V
IN
=6V I
OUT
=30mA
V
IN
=6V f=120Hz
V
RIPPLE
=1V
P-P
, I
OUT
=30mA
V
IN
=6V, f=20~80kHz I
OUT
=30mA
V
IN
=H L
Tj=-20~+85°C
V
OUT
=H
L
H
25
5
V
OUT
=3.9V
Cd=0.1µF
Cd=0.1µF
VOL=0.4V
4.03
50
4.90
Min. Typ. Max. Unit
400
2.5
5.00
0.25
10
40
100
60
200
4.2
100
50
100
10
30
0.65
100
200
15
90
0.85
400
4.37
5.10
0.50
30
80
800
µA
mA
V
V
mV
mV
ppm/°C
dB
µVrms
V
ppm/°C
mV
mV
mS
µS
V
Symbol
Iccq1
Iccq2
V
OUT
Vi0
V1
V2
V
OUT
/ T
RR
*
1
*
1
*
1
Ripple rejection
Output noise voltage
Reset
Detecting voltage
Vn
VS
VS/ T
VS
V
OL
t
PLH
t
PHL
V
OPL
Vs temperature coefficient
*
1
Hysteresis voltage
Low-level output voltage
RESET delay time
"L" transmission delay time
*
1
Threshold operating voltage
Note 1: design guaranteed
----------------------------------------
----------------------------------------
MITSUMI
Regulator+Reset IC MM1437
Measuring Circuit
Application Circuit
Note 1 : This regulator is not internally compensated and thus requires an external output-capacitor (C
OUT
) for
stability.
Note 2 : RESET-terminal with a built-in pull-up resistance (10kΩ).
------------------------------
------------------------------
MITSUMI
Regulator+Reset IC MM1437
Timing Chart
V
IN
10V
5V
0V
V
OUT
5V
VS
VS
0V
RESET
5V
t
PLH
0V
t
PLH
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