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PDF NCP4687 Data sheet ( Hoja de datos )
| Número de pieza | NCP4687 | |
| Descripción | LDO Linear Voltage Regulator | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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NCP4687
500 mA, High PSRR, LDO
Linear Voltage Regulator
The NCP4687 is a CMOS 500 mA LDO linear voltage regulator
with high output voltage accuracy which features a high ripple
rejection, low supply current with low dropout and chip enable with
built−in low RDS(on) NMOS transistor for fast output capacitor
discharging as option. The device is composed of the voltage reference
unit, error amplifier, resistor divider for output voltage sensing or
precise output voltage setting. The current limit and thermal shutdown
makes the device very suitable for industrial applications and portable
communication equipments.
Features
• Operating Input Voltage Range: 2.5 V to 5.25 V
• Output Voltage Range: 0.7 to 3.6 V (available in 0.1 V steps)
• ±0.8% Output Voltage Accuracy @ Vout > 1.8 V
• Output noise : 40 mVrms
• Line Regulation: 0.02%/V
• Current Limit Circuit
• High PSRR: 75 dB at 1 kHz, 70 dB at 10 kHz
• Thermal Shutdown
• Available in SOT−23−5, SOT−89−5 and uDFN 1.2 x 1.2 mm
Packages
• Pb−Free Packages are Available
Typical Applications
• Home Appliances, Industrial Equipment
• DVB−T and DVB−S Receivers
• Car Audio Equipment, Navigation Systems
• Notebook Adaptors, LCD TVs, Cordless Phones and Private LAN
Systems
VIN
C1
1.0 mF
NCP4687x
VIN VOUT
CE SENSE
GND
VOUT
C2
1.0 mF
http://onsemi.com
MARKING
DIAGRAMS
SOT89−5
CASE 528AB
XDFN6
CASE 711AH
XX
MM
SOT−23−5
CASE 1212
XXX
MM
XX, XXX= Specific Device Code
MM = Date Code
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
Figure 1. Typical Application Schematic
© Semiconductor Components Industries, LLC, 2011
September, 2011 − Rev. 0
1
Publication Order Number:
NCP4687/D
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
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NCP4687
TYPICAL CHARACTERISTICS
0.8
0.7
0.6 1.7 V
0.5 2.7 V
0.4 3.5 V
0.3 VIN = 1.4 V
0.2
0.1
0
0 100 200 300 400 500 600 700 800
IOUT, OUTPUT CURRENT (mA)
Figure 3. Output Voltage vs. Output Current
0.7 V Version
4
3.5
3 VIN = 4.1 V
2.5 4.6 V
2
1.5
1
0.5
0
0 100 200 300 400 500 600 700 800
IOUT, OUTPUT CURRENT (mA)
Figure 5. Output Voltage vs. Output Current
3.6 V Version
3
2.5
2
1.5
1 1 mA
0.5 30 mA
IOUT = 50 mA
00 1 2 3 4 5 6
VIN, INPUT VOLTAGE (V)
Figure 7. Output Voltage vs. Input Voltage 2.5 V
Version
3
2.5
VIN = 4.0 V
2
1.5
3.5 V
1
0.5 3.0 V
0
0 100 200 300 400 500 600 700 800 900
IOUT, OUTPUT CURRENT (mA)
Figure 4. Output Voltage vs. Output Current
2.5 V Version
0.8
0.7
0.6
0.5
0.4 1 mA
0.3
30 mA
0.2
0.1 IOUT = 50 mA
0
0123456
VIN, INPUT VOLTAGE (V)
Figure 6. Output Voltage vs. Input Voltage 0.7 V
Version
4
3.5
3
2.5
2
1.5
1 1 mA
0.5
30 mA
IOUT = 50 mA
00 1 2 3 4 5 6
VIN, INPUT VOLTAGE (V)
Figure 8. Output Voltage vs. Input Voltage 3.6 V
Version
http://onsemi.com
5
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5 Page 
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NCP4687
TYPICAL CHARACTERISTICS
150
100
50
2.515
0
2.510
2.505
2.500
2.495
2.490
2.485
2.4800 10 20 30 40 50 60 70 80 90 100
t (ms)
Figure 31. Load Transients, 2.5 V Version, Load
Step 50 mA to 100 mA
3.615
3.610
3.605
150
100
50
0
3.600
3.595
3.590
3.585
3.5800 10 20 30 40 50 60 70 80 90 100
t (ms)
Figure 32. Load Transients, 3.6 V Version, Load
Step 50 mA to 100 mA
Chip Enable
3.75
2.5
1.25
0
0.8
0.6
0.4
0.2
0.0
−0.2
0
IOUT = 1 mA
IOUT = 100 mA
IOUT = 400 mA
50 100 150 200 250
t (ms)
Figure 33. Turn On with CE Behavior, 0.7 V
Version
300
http://onsemi.com
11
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11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet NCP4687.PDF ] | |
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