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PDF LM337M Data sheet ( Hoja de datos )
| Número de pieza | LM337M | |
| Descripción | MEDIUM CURRENT THREE-TERMINAL ADJUSTABLE NEGATIVE VOLTAGE REGULATOR | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Order this document by LM337M/D
Three-Terminal Adjustable
Output Negative Voltage
Regulator
The LM337M is an adjustable three–terminal negative voltage regulator
capable of supplying in excess of 500 mA over an output voltage range of
–1.2 V to –37 V. This voltage regulator is exceptionally easy to use and
requires only two external resistors to set the output voltage. Further, it
employs internal current limiting, thermal shutdown and safe area
compensation, making it essentially blow–out proof.
The LM337M serves a wide variety of applications including local,
on–card regulation. This device can also be used to make a programmable
output regulator or by connecting a fixed resistor between the adjustment
and output. The LM337M can be used as a precision current regulator.
• Output Current in Excess of 500 mA
• Output Adjustable Between –1.2 V and –37 V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe–Area Compensation
• Floating Operation for High Voltage Applications
• Standard 3–Lead Transistor Packages
• Eliminates Stocking Many Fixed Voltages
LM337M
MEDIUM CURRENT
THREE–TERMINAL
ADJUSTABLE NEGATIVE
VOLTAGE REGULATOR
SEMICONDUCTOR
TECHNICAL DATA
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Pin 1. Adjust
2. Vin
3. Vout
1
2
3
Standard Application
IPROG
Cin *
–Vin
+
1.0µF
R2
R1
120
IAdj
Adjust
Vin Vout
LM337M
+
CO ** 1.0µF
–Vout
*Cin is required if regulator is located more than 4″ from power supply filter.
**A 1.0 µF solid tantalum or 10 µF aluminum electrolytic is recommended.
+ ǒ ) Ǔ**CO is necessary for stability. A 1.0 µF solid tantalum or 10 µF aluminum
**electrolytic is recommeded.
Vout
–1.25 V 1
R2
R1
MOTOROLA ANALOG IC DEVICE DATA
ORDERING INFORMATION
Device
LM337MT
Operating
Temperature Range Package
TJ = 0° to +125°C Plastic Power
© Motorola, Inc. 1996
Rev 1
1
1 page  
LM337M
Figure 5. Load Regulation
0.2
0
IL = 0.5 A
–0.2
–0.4
–0.6
–0.8
–1.0
Vin = –15 V
Vout = –10 V
–1.2
–1.4
–50 –25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Figure 6. Current Limit
4
3
TJ = 25°C
2
TJ = 150°C
1
TJ = 55°C
0
0 10 20 30
VI – VO, INPUT VOLTAGE DIFFERENTIAL (Vdc)
40
Figure 7. Adjustment Pin Current
80
75
70
65
60
55
50
45
40
–50 –25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Figure 9. Temperature Stability
1.270
1.260
1.250
1.240
1.230
–50 –25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
MOTOROLA ANALOG IC DEVICE DATA
Figure 8. Dropout Voltage
3.0
Vout = –5.0 V
∆Vout = 100 mV
2.5
2.0
1.5 IL = 200 mA
IL = 500 mA
IL = 20 mA
1.0
–50 –25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Figure 10. Minimum Operating Current
1.8
TJ = –55°C
1.6
1.4 TJ = 25°C
1.2 TJ = 150°C
1.0
0.8
0.6
0.4
0.2
0
0 10 20 30 40
Vin–Vout, INPUT–OUTPUT VOLTAGE DIFFERENTIAL (Vdc)
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LM337M.PDF ] | |
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