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PDF NCP508 Data sheet ( Hoja de datos )
| Número de pieza | NCP508 | |
| Descripción | 50 mA Low Dropout Voltage Regulator | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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NCP508
www.DataSheet4U.com
Very Low Noise, Fast Turn
On, 50 mA Low Dropout
Voltage Regulator
The NCP508 is a 50 mA low noise voltage regulator, designed to
exhibit fast turn on time and high ripple rejection. Each device
contains a voltage reference unit, an error amplifier, a PMOS power
transistor, resistors for setting output voltage, current limit, and
temperature limit protection circuits.
The NCP508 has been designed for use with ceramic capacitors.
The device is housed in SC−88A and WDFN6 1.5x1.5 packages.
Standard voltage versions are 1.5, 1.8, 2.5, 2.8, 3.0, and 3.3. Other
voltages are available in 100 mV steps.
Features
• Very Low Noise at 39 mVrms without a Bypass Capacitor
• High Ripple Rejection of 70 dB at 1 kHz
• Low Dropout Voltage of 140 mV (typ) at 30 mA
• Tight Load Regulation, typically 6 mV for DIout = 50 mA
• Fast Enable Turn−On time of 20 msec
• Logic Level Enable
• ESR can vary from a few mW to 3 W
• These are Pb−Free Devices
Typical Applications
• RF Subsystems in Handsets
• Noise Sensitive Circuits; VCOs, PLL
Battery or
Unregulated
Voltage
C1
1m
1
2
5
ON
OFF
34
Figure 1. Typical Application Diagram
Vout
C2
1m
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4
5
123
SC70−5/SC−88A/SOT−353
SQ SUFFIX
CASE 419A
MARKING
DIAGRAM
5
xxx MG
G
1
XXX = Specific Device Code
M = Date Code*
G = Pb−Free Package
(Note: Microdot may be in either location)
*Date Code orientation and/or position may
vary depending upon manufacturing location.
WDFN6
MN SUFFIX
CASE 511BJ
1
XX MG
XX = Specific Device Code
M = Date Code
G = Pb−Free Package
PIN CONNECTIONS
Vin 1
GND 2
5 Vout
Enable 3
4 NC
SC−88A
(Top View)
Vout 1
NC 2
GND 3
6 Vin
5 NC
4 Enable
WDFN6
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
© Semiconductor Components Industries, LLC, 2010
May, 2010 − Rev. 3
1
Publication Order Number:
NCP508/D
1 page  
NCP508
TYPICAL CHARACTERISTICS
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330
310 Vout = 0 V
290
270
250
230
210
190
170
150
−40 −20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Figure 8. Short−Circuit Current Limit vs.
Temperature, 1.5 V
300
VEN = 0 V
250
200
150
100
50
0
−40 −20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Figure 10. Quiescent Current vs. Temperature,
1.5 V
400
Vout = 0 V
350
300
250
200
150
100
50
0
−40 −20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Figure 9. Short−Circuit Current Limit vs.
Temperature, 3.3 V
450
400 VEN = 0 V
350
300
250
200
150
100
50
0
−40 −20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Figure 11. Quiescent Current vs. Temperature,
3.3 V
145
Vin = Vout + 1 V
140 Iout = 0 mA
135
130
125
120
−40 −20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Figure 12. Ground Current vs. Temperature,
1.5 V
146
144
Vin = Vout + 1 V
Iout = 0 mA
142
140
138
136
134
132
130
128−40 −20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Figure 13. Ground Current vs. Temperature,
3.3 V
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5
5 Page 
NCP508
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Cin = Cout = 1 mF
Vin = VEN = 2.8 V
Vout = 2.5 V
TA = 25°C
Ilimit = 180 mA
0.06
0.05
0.04
0.03
0.02
0.01
VEN = Vin
Cin = Cout = 1 mF
TA = 85°C
50 mA/div
500 ms/div
0 0 1 2 3 4 5 6 7 8 9 10 11 12 13
Figure 32. Hard Short−Circuit Current (by Copper Wires)
Vin, INPUT VOLTAGE (V)
Figure 33. Measured Power Operating Area,
1.5 V, TA = 855C, Vout_drop = max 0.1 V
33 x 26 mm
Figure 34. Evaluation Board
350 0.25
300
PD
250
0.2
200
0.15
qJA
150 0.1
100
0.05
50
PCB Copper Thickness = 1.0 oz
00
0 100 200 300 400 500 600 700 800 900 1000
COPPER HEAT SPREADER AREA (mm2)
Figure 35. SC70−5 Thermal Resistance vs.
Copper Heat Spreader Area
400
350
300
250
200
150
100
PCB Copper Thickness = 1.0 oz
50 0 100 200 300 400 500 600 700 800 900
PCB COPPER HEAT SPREADER AREA (mm2)
Figure 36. WDFN6 Thermal Resistance vs.
Copper Heat Spreader Area
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11
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| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet NCP508.PDF ] | |
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