MM1257 [MITSUMI]
High-Precision Three-Pin Regulator; 高精度三针调节器
| 型号： | MM1257 |
| 厂家： | 
MITSUMI ELECTRONICS, CORP. |
| 描述： | High-Precision Three-Pin Regulator |
| 文件： | 总3页 (文件大小：64K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
High-Precision Three-Pin Regulator MM1257
MITSUMI
High-Precision Three-Pin Regulator
Monolithic IC MM1257
Outline
This IC is a high-precision high-voltage stabilized power supply device which stands out from ordinary low-
saturation three-pin regulators.
It can be used at a wide range of output voltages, from 3V to 12V, delivering output currents up to 100mA. It
is one of a series of devices available at lower prices than previous regulators.
Features
1. Input current
27V max.
2. Output noise voltage
3. Maximum output current
4. No-load input current
5. Thermal shutdown circuit provided
6. Output voltage ranks
200µVRMS typ.
100mA max.
500µA typ.
A : 12V 2ꢀ E : 6V 2ꢀ
B : 10V 2ꢀ F : 5V 2ꢀ
C : 9V 2ꢀ G : 3V 2ꢀ
D : 8V 2ꢀ
Package
TO-92A (MM1257 T)
MMP-4A (MM1257 M)
The output voltage rank appears in the boxes.
*
Applications
1. Handheld computers
2. Portable transceivers
3. Cordless phones
Pin Assignment
1
2
3
4
NC
VIN
4
1
3
2
1
2
3
VOUT
GND
VIN
VOUT
GND
1
2
3
-
MMP 4A
-
TO 92A
High-Precision Three-Pin Regulator MM1257
MITSUMI
Equivalent Circuit Diagram
(Ta=25°C)
Absolute Maximum Ratings
Item
Symbol
Ratings
-40~+125
Units
°C
Storage temperature
Operating temperature
Power supply current
Output current
TSTG
TOPR
-20~+75
°C
VCC max.
IOUT
27
100
V
mA
mW
Maximum Ratings
Pd
200 (MMP-4A), 300 (TO-92A)
Recommended Operating Conditions
Item
Symbol
Ratings
7~27
Units
V
Input voltage
Output current
VIN
IO
1~100
mA
Pin Description
Pin no.
Pin name
Function
1
2
3
4
N.C
VIN
N.C
Power supply input pin
Regulator output pin
GND
VOUT
GND
High-Precision Three-Pin Regulator MM1257
MITSUMI
(VO=5V)
Electrical Characteristics
Measurement
Measurement
Item
Symbol
Min. Typ. Max. Units
conditions
circuit
A
B
C
D
E
F
11.76 12.0 12.24
9.80 10.0 10.20
8.82 9.0 9.18
7.84 8.0 8.16
5.88 6.0 6.12
4.90 5.0 5.10
2.94 3.0 3.06
V
IN=Vo+3V, Io=40mA
Output voltage
VO
ICCq
V1
1
1
1
V
VIN=7V, Io=40mA
G
No-load input current
Input fluctuation rate
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
IN=Vo+4V, Io=40mA
IN=14.5V~25V, Io=40mA
IN=12.5V~24V, Io=40mA
IN=11.5V~22V, Io=40mA
IN=10.5V~22V, Io=40mA
IN=8.5V~20V, Io=40mA
IN=7V~20V, Io=40mA
IN=7V~18V, Io=40mA
IN=15V, Io=1~100mA
IN=13V, Io=1~100mA
IN=12V, Io=1~100mA
IN=11V, Io=1~100mA
IN=9V, Io=1~100mA
IN=8V, Io=1~100mA
IN=8V, Io=1~100mA
0.50 1.50 mA
120 250
110 250
A
B
C
D
E
F
G
A
B
C
D
E
F
100 250
90
60
50
25
80
70
65
60
40
20
20
250 mV
200
150
150
160
140
130
120 mV
80
60
Load fluctuation rate
V2
1
G
60
Measuring Circuit
Application Circuits
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