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PDF NCP4561 Data sheet ( Hoja de datos )
| Número de pieza | NCP4561 | |
| Descripción | ULTRA LOW-NOISE LOW DROPOUT VOLTAGE REGULATOR | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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NCP4561
Ultra Low-Noise Low
Dropout Voltage Regulator
with 1.0 V ON/OFF Control
The NCP4561 is a Low DropOut (LDO) regulator featuring
excellent noise performances. Thanks to its innovative concept, the
circuit reaches an incredible 40 mVRMS noise level without an
external bypass capacitor. Housed in a small SOT–23 5 leads–like
package, it represents the ideal designer’s choice when space and
noise are at premium.
The absence of external bandgap capacitor unleashes the response
time to a wake–up signal and makes it stay within 40 ms (in repetitive
mode), pushing the NCP4561 as a natural candidate in portable
applications.
The NCP4561 also hosts a novel architecture which prevents
excessive undershoots when the regulator is the seat of fast transient
bursts, as in any bursting systems.
Finally, with a static line regulation better than –75 dB, it naturally
shields the downstream electronics against choppy lines.
Features
• Ultra Low–Noise: 150 nV/√Hz @ 100 Hz, 40 mVRMS 100 Hz –
100 kHz Typical, Iout = 60 mA, Co = 1.0 mF
• Fast Response Time from OFF to ON: 40 ms Typical at a 200 Hz
Repetition Rate
• Ready for 1.0 V Platforms: ON with a 900 mV High Level
• Nominal Output Current of 80 mA with a 100 mA Peak Capability
• Typical Dropout of 90 mV @ 30 mA, 160 mV @ 80 mA
• Ripple Rejection: 70 dB @ 1.0 kHz
• 1.5% Output Precision @ 25°C
• Thermal Shutdown
Applications
• Noise Sensitive Circuits: VCOs RF Stages, etc.
• Bursting Systems (TDMA Phones)
• All Battery Operated Devices
ON/
OFF 1
On/Off
NC
3
Band Gap
Reference
Thermal
Shutdown
GND
*Current Limit
*Antisaturation Protection
*Load Transient Improvement
2
Figure 1. Simplified Block Diagram
5 Vin
4 Vout
http://onsemi.com
5
1
TSOP–5
SN SUFFIX
CASE 483
PIN CONNECTIONS AND
MARKING DIAGRAM
ON/OFF 1
GND 2
5 Vin
NC 3
4 Vout
(Top View)
P28 = Device Code
Y = Year
W = Work Week
ORDERING INFORMATION
Device
Voltage
Output*
Shipping
NCP4561SN28T1 2.8 V 3000/Tape & Reel
* Contact your ON Semiconductor sales
representative for other output voltage values.
© Semiconductor Components Industries, LLC, 2002
May, 2002 – Rev. 2
1
Publication Order Number:
NCP4561/D
Free Datasheet http://www.datasheet4u.com/
1 page  
NCP4561
TYPICAL CHARACTERISTICS
6.000
5.500
5.000
4.500
4.000
3.500
3.000
2.500
2.000
1.500
1.000
0.500
0.000
0
–40°C
25°C
85°C
20 40
60 80
OUTPUT CURRENT (mA)
100
Figure 2. Ground Current vs. Output Current
210
205
200
195
190
185
–60
–40 –20 0 20 40 60
AMBIENT TEMPERATURE (°C)
80 100
Figure 3. Quiescent Current vs. Temperature
200
150
100
50
00
85°C
25°C
–40°C
–20 40 60 80
OUTPUT CURRENT (mA)
100
2.810
2.805
2.800
85°C
2.795
2.790 25°C
2.785
2.780
2.775 –40°C
2.770
2.765
2.760
2.755
0 20 40
60
OUTPUT CURRENT (mA)
80
100
Figure 4. Dropout vs. Output Current
Figure 5. Output Voltage vs. Output Current
180
160 80 mA
140
120
100 60 mA
80
60 30 mA
40
20
0
–60 –40 –20
0
20 40 60 80
TEMPERATURE (°C)
Figure 6. Dropout Voltage vs. Temperature
100
1000
100
OUTPUT NOISE SPECTRAL DENSITY
Vin = Vout + 1
Cout = 1 mF
IO = 10 & 50 mA
10
RMS Noise
10 Hz to 100 kHz: 36 mV
10 Hz to 1 MHz: 47 mV
1
0.01 0.1
1
10
FREQUENCY (kHz)
100
1000
Figure 7. Typical Noise Density Performance
http://onsemi.com
5
Free Datasheet http://www.datasheet4u.com/
5 Page 
NCP4561
TYPICAL TRANSIENT RESPONSES
Tek Run: 1.00 MS/s
Sample
Vout
200 mV/div
Iload
20 mA/div
C4 Max
2.824 V
C4 Mean
2.7848 V
C4 Mean
2.776 V
Ch2 20.0 mVW M 50.0 ms Ch2 38.4 mV
Ch4 200 mV
(Conditions: Vin = 3.8 V, Cout = 1 mF)
Figure 15. Load Current is Switched from 40 to 0 mA
Tek Stop: 1.00 MS/s
1930 Acgs
Vout 200 mV/div
Iload
20 mA/div
C4 Max
2.844 V
C4 Mean
2.7848 V
C4 Min
2.708 V
Ch1 20.0 mVW M 50.0 ms Ch1
Ch4 200 mV
0V
(Conditions: Vin = 3.8 V, Cout = 1 mF)
Figure 16. Load Current is Switched from 80 to 0 mA
http://onsemi.com
11
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet NCP4561.PDF ] | |
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