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PDF NCP631 Data sheet ( Hoja de datos )
| Número de pieza | NCP631 | |
| Descripción | Linear Voltage Regulator | |
| Fabricantes | ON Semiconductor | |
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NCP631
3.0 A Linear Voltage
Regulator with Soft−Start
The NCP631 is a low dropout positive voltage regulator that is
capable of providing a guaranteed output current of 3.0 A with a
maximum dropout voltage of 1.25 V at 3.0 A over temperature. The
NCP631 is currently offered as a fixed voltage version at 3.47 V. On
chip trimming adjusts the reference/output voltage to within "1.5%
accuracy. The Soft−Start function allows control of start up times. This
prevents current spikes at start up due to output capacitor in−rush
current. Internal protection features consist of output foldback current
limiting, and thermal shutdown. The NCP631 is available in D2PAK
package.
Features
• Output Current of 3.0 A
• 1.25 V Maximum Dropout Voltage at 3.0 A Over Temperature
• Voltage on Shutdown Pin is TTL compatible
• Reference/Output Voltage Trimmed to "1.5 %
• Current Limit Protection
• Thermal Shutdown Protection
• 0°C to 125°C Junction Temperature Range
• Pb−Free Packages are Available
Applications
• Microprocessor Power Supplies
• SMPS Post Regulation
• Battery Chargers
• DSP Power Supplies
www.DataSheet4U.com
INPUT
Cin
24
1 NCP631 5
Cs
3
Cout
Shutdown
Vout
3.47
Figure 1. Typical Application Circuit
http://onsemi.com
1
5
D2PAK
D2T SUFFIX
CASE 936A
Tab = Ground
Pin 1. Shutdown
2. Vin
3. Ground
4. Vout
5. Soft−Start
MARKING DIAGRAM
NC
P631GD2T
AWLYWWG
NCP631GD2T = Device Code
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
ORDERING INFORMATION
Device
Package
Shipping†
NCP631GD2TR4
D2PAK 800/Tape & Reel
NCP631GD2TR4G D2PAK 800/Tape & Reel
(Pb−Free)
NCP631GD2T
D2PAK 50 Units / Tube
NCP631GD2TG
D2PAK 50 Units / Tube
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2006
April, 2006 − Rev. 5
1
Publication Order Number:
NCP631/D
1 page  
1.200
1.000
0.800
0.600
0.400
0.200
0.000
1
NCP631
120
100
80
40
Vin = 4.47 V
Cout = 33 mF
Cin = 100 mF
Iout = 10 mA
10 100
40
20
0
1,000 10,000 100,000 1,000,000 10
f, FREQUENCY (Hz)
Figure 8. Noise Characterization
Vin = 5.0 V + 0.5 Vpp
Cout = 100 mF, Al Electrolytic
Iout = 10 mA
100
1,000
10,000
100,000
f, FREQUENCY (Hz)
Figure 9. Ripple Rejection vs. Frequency
77
66
55
50 60
40
Cin = 68 mF, Al Electrolytic
Cout = 33 mF, Al Electrolytic
40
30 Iout = 200 mA
20
20 0
10 −20
0
0
100 200
300 400
500
600
−40
0
TIME (mS)
Figure 10. Line Transient
Cin = 1.0 mF
Cout = 33 mF, Al Electrolytic
Iout = 200 mA
10 20 30 40
TIME (mS)
Figure 11. Line Transient
50
60
4.5
3.0
1.5
Iout = 100 mA to 3.0 A
0
0
−50
−100
−150
0
Cin = 68 mF, Al Electrolytic
Cout = 33 mF, Al Electrolytic
Vin = 5.0 V
10 20 30 40 50
TIME (mS)
Figure 12. Load Transient
60
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5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet NCP631.PDF ] | |
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