MITSUMI
150mA Regulator MM157
N, 161
N
150mA Regulator
Monolithic IC MM157
Outline
N, 161
N
This IC is an ultra-small, low noise, stable power supply that supports ceramic capacitors (low ESR) Output
current goes up to 150mA, and use of a noise pin reduces output noise even further.
Output ON/OFF can be controlled with the ON/OFF pin.
Features
1. I/O voltage difference
0.10V typ. (I
O
=50mA)
2. Output noise voltage
30µVrms typ. (Cn=0.01µF)
3. Recommended maximum output current
150mA max.
4. No-load current consumption
85µA typ.
5. Built-in overcurrent protection and thermal shutdown circuits
6. Output voltage rank
1.8 ~ 5.0V (0.1V steps)
7. Output ON/OFF control function
High: ON, Low: OFF
Package
SOT-25A (MM157
N, MM161
N)
contains the output voltage rank.
*
Applications
1. Cordless telephone
2. Cellular telephone, PHS
3. Portable MD
4. Other battery-powered portable equipment
Pin Assignment
MM157
5
4
1
2
3
4
5
N
V
IN
GND
Cont
Noise
V
O
MM161
1
2
3
4
5
N
Cont
GND
Noise
V
OUT
V
IN
1
2
3
SOT-25A
(TOP VIEW)
*
The component MM161
N is MM157
N with changed pin configuration.
MITSUMI
150mA Regulator MM157
N, 161
N
Equivalent Circuit Diagram
V
IN
Cin
1µF
V
O
Bias
Co
1µF
Cont
Reference
Driver
Current
limitter
Thermal
shutdown
GND
Noise
Cn
0.01µF
Pin Description
Pin No.
1
Typical model: MM157
Function
N
Internal equivalent circuit diagram
Pin name
V
IN
Input pin
The capacitor is required to
connect with input pin
more than 1µF.
Input
circuit
2
3
GND
Cont
Ground
ON/OFF Control pin
Cont
H
L
V
O
ON
OFF
Cont pin must be
connected with V
IN
pin, if it
is not used.
MITSUMI
150mA Regulator MM157
N, 161
N
Pin No.
4
Pin name
Noise
Function
Noise decrease pin
Connecting 0.01µF
capacitor can decrease
output noise. If the noise
decrease capacitor is not
connected, the pin may be
influenced by outside
noise.
Output pin
The capacitor must be
connected with output pin
more than 1µF.
Internal equivalent circuit diagram
5
V
O
Absolute Maximum Ratings
Item
Storage temperature
Operating temperature
Supply voltage
Allowable loss
(Ta=25°C)
Symbol
T
STG
T
OPR
V
IN
Pd
Ratings
-40~+150
-30~+85
-0.3~+12
150 (Not attached)
Units
°C
°C
V
mW
Recommend Operating Conditions
Recommended
Item
Output current
Operating voltage
Symbol
I
OUT
V
OP
Ratings
0~150
V
OUT
Typ. +0.5~+12
Units
mA
V
MITSUMI
150mA Regulator MM157
N, 161
N
Electrical Characteristics 1
Item
No-Load input current
Input current (OFF)
Output voltage
Dropout voltage 2
Line regulation
Load regulation
V
OUT
temperature coefficient 1
Ripple rejection 1 1
Ripple rejection 2 1
Output noise voltage 1
Cont pin input current
Cont pin high threshold level
Cont pin low threshold level
(Except where noted therwise, Ta=25°C, V
IN
=V
O
Typ. +1V, I
O
=1mA, V
CONT
=2V)
Measurement conditions
I
O
=0mA
V
CONT
=0V
V
IN
=V
O
-0.2V, I
O
=50mA
V
IN
=V
O
Typ. +1~10V
I
O
=1~150mA
Tj=-30~+85°C
f=120Hz V
RIPPLE
=1V
f=1kHz, Cn=0.01µF V
RIPPLE
=1V
fBW=20~80kHz Cn=0.01µFC
V
CONT
=5V
Min. Typ. Max. Units
85
130
µA
0
0.1
µA
0.98
1.02 V
0.1
0.2
V
10
20
mV
30
90
mV
100
ppm/°C
50
70
dB
60
dB
30
µVrms
5
15
µA
1.6
V
IN
+0.3 V
-0.3
0.4
V
*
*
*
*
*
Symbol
I
CC
I
CCOFF
V
OUT
Vio
V1
V2
V
OUT
/ T
RR1
RR2
Vn
I
CONT
V
CONT
H
V
CONT
L
*
1.
*
2.
The parameter is guaranteed by design.
The parameter is not guaranteed in the model less than V
OUT
=2V
Electrical Characteristics 2
Output Voltage
Typical model: MM157
N
Product
Test
Output voltage
condisions Min. Typ. Max.
name
MM1571J
1.764 1.8 1.836
MM1571K
1.862 1.9 1.938
MM1572A
1.960 2.0 2.040
MM1572B
2.058 2.1 2.142
MM1572C
2.156 2.2 2.244
MM1572D
2.254 2.3 2.346
MM1572E
2.352 2.4 2.448
MM1572F
2.450 2.5 2.550
MM1572G
2.548 2.6 2.652
MM1572H
2.646 2.7 2.754
MM1572J
2.744 2.8 2.856
I
O
=1mA
MM1572K
2.842 2.9 2.958
MM1573A
2.940 3.0 3.060
MM1573B
3.038 3.1 3.162
MM1573C
3.136 3.2 3.264
MM1573D
3.234 3.3 3.366
MM1573E
3.332 3.4 3.468
MM1573F
3.430 3.5 3.570
MM1573G
3.528 3.6 3.672
MM1573H
3.626 3.7 3.774
MM1573J
3.724 3.8 3.876
MM1573K
3.822 3.9 3.978
Product
Test
Output voltage
condisions Min. Typ. Max.
name
MM1574A
3.920 4.0 4.080
MM1574B
4.018 4.1 4.182
MM1574C
4.116 4.2 4.284
MM1574D
4.214 4.3 4.386
MM1574E
4.312 4.4 4.488
MM1574F
I
O
=1mA 4.410 4.5 4.590
MM1574G
4.508 4.6 4.692
MM1574H
4.606 4.7 4.794
MM1574J
4.704 4.8 4.896
MM1574K
4.802 4.9 4.998
MM1575A
4.900 5.0 5.100
Rank is indicated inside
*
Example: MM1613N is 3.9Vfor MM161
typ.
N.
MITSUMI
150mA Regulator MM157
N, 161
N
Measuring Circuit
Typical model: MM157
N
Ceramic
1µF
A
*
V
Ceramic
0.01µF
5
4
V
O
Noise
V
IN
1
A
GND
2
Cont
3
A
1µF
Ceramic
*
Application Circuit
Typical model: MM157
N
Ceramic
1µF
*
Ceramic
0.01µF
5
4
V
O
Noise
V
IN
1
GND
2
Cont
3
1µF
Ceramic
*
*
Temperature Characteristics:
B Type
Note
1. The output capacitor is required between output and GND to prevent oscillation.
2. Use a capacitance that is within the ESR characteristics stable range for output capacity.
It is possible to use a ceramic capacitor without ESR resistance for output.
The ceramic capacitor must be used more than 1µF and B type temperature characteristics.
3. The wire of Vcc and GND is required to print full ground plane for noise and stability.
4. The input capacitor must be connected a distance of less than 1cm from input pin.
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