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PDF NCP3985 Data sheet ( Hoja de datos )
| Número de pieza | NCP3985 | |
| Descripción | Ultra-Low Dropout BiCMOS Voltage Regulator | |
| Fabricantes | ON Semiconductor | |
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NCP3985
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Micropower, 150 mA
Low-Noise, High PSRR,
Ultra-Low Dropout BiCMOS
Voltage Regulator
The NCP3985 is 150 mA LDO that provides the engineer with a
very stable, accurate voltage with low noise and high Power Supply
Rejection Ratio (PSRR) suitable for sensitive applications. In order to
optimize performance for battery operated portable applications, the
NCP3985 employs an advanced BiCMOS process to combine the
benefits of low noise and superior dynamic performance of bipolar
elements with very low ground current consumption at full loads
offered by CMOS.
The NCP3985 is stable with small, low value capacitors and is
available in TSOP-5 package.
Features
•ăOutput Voltage Options:
- 1.8 V, 2.5 V, 2.75 V, 2.8 V, 3.0 V, 3.3 V
- Contact Factory for Other Voltage Options
•ăOutput Current Limit 200 mA
•ăLow Noise (typ 20 mVrms)
•ăHigh PSRR (typ 70 dB)
•ăStable with Ceramic Output Capacitors as low as 1 mF
•ăLow Sleep Mode Current (max 1 mA)
•ăActive Discharge Circuit
•ăCurrent Limit Protection
•ăThermal Shutdown Protection
•ăDirect Replacement for LP3985
•ăThese are Pb-Free Devices
Typical Applications
•ăCellular Telephones
•ăNoise Sensitive Applications (Video, Audio)
•ăAnalog Power Supplies
•ăPDAs / Palmtops / Organizers / GPS
•ăBattery Supplied Devices
http://onsemi.com
5
1
TSOP-5
SN SUFFIX
CASE 483
MARKING
DIAGRAM
5
XXXAYWG
G
1
XXX = Specific Device Code
A = Assembly Location
Y = Year
W = Work Week
G = Pb-Free Package
(Note: Microdot may be in either location)
PIN ASSIGNMENT
Vin
GND
Vout
CE Cnoise
(Top View)
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 9 of this data sheet.
Vin
Cin
Vin Vout
NCP3985
CE Cnoise
GND
Cnoise
Vout
Cout
Figure 1. Typical Application Schematic
©Ă Semiconductor Components Industries, LLC, 2008
April, 2008 - Rev. 1
1
Publication Order Number:
NCP3985/D
1 page  
NCP3985
TYPICAL CHARACTERISTICS
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4.0
3.5 3.3 V
3.0 3.0 V
2.8 V
2.5 2.5 V
2.0
1.8 V
1.5
1.0
0.5 TA = 25°C
Iout = 1 mA
0.0
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Vin, INPUT VOLTAGE (V)
Figure 9. Output Voltage vs. Input Voltage
140
130
120 Iout = 150 mA
110
100
90
80
70 Iout = 1 mA
60
50
40
-40 -20 0 20 40 60 80 100
TA, AMBIENT TEMPERATURE (°C)
Figure 10. Ground Current vs. Temperature
200
180 TA = 25°C Vout = 2.8 V
160
140 Vout = 2.5 V
Vout = 3.3 V
Vout = 3.0 V
120 Iout = 150 mA
100
80
Vout = 1.8 V
Iout = 1 mA
60
40
20
0
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Vin, INPUT VOLTAGE (V)
Figure 11. Ground Current vs. Input Voltage
125
120 Vout = 2.8 V
TA = 85°C
115
110
105 TA = 25°C
100
95 TA = -40°C
90
85
80
75
0 25 50 75 100 125 150
Iout, OUTPUT CURRENT (mA)
Figure 13. Dropout Voltage vs. Output Current
135
130 Vout = 2.5 V
125
120 TA = 85°C
115
110
105 TA = 25°C
100
95 TA = -40°C
90
85
0 25 50 75 100 125 150
Iout, OUTPUT CURRENT (mA)
Figure 12. Dropout Voltage vs. Output Current
125
120 Vout = 3.0 V
115
TA = 85°C
110
105 TA = 25°C
100
95 TA = -40°C
90
85
80
75
0 25 50 75 100 125 150
Iout, OUTPUT CURRENT (mA)
Figure 14. Dropout Voltage vs. Output Current
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet NCP3985.PDF ] | |
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