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PDF MC33761 Data sheet ( Hoja de datos )
| Número de pieza | MC33761 | |
| Descripción | Ultra Low-Noise Low Dropout Voltage Regulator with 1V ON/OFF Control | |
| Fabricantes | ON Semiconductor | |
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MC33761
Product Preview
Ultra Low-Noise Low
Dropout Voltage Regulator
with 1V ON/OFF Control
The MC33761 is an Low DropOut (LDO) regulator featuring
excellent noise performances. Thanks to its innovative concept, the
circuit reaches an incredible 40µVRMS 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 40µs (in repetitive
mode), pushing the MC33761 as a natural candidate in portable
applications.
The MC33761 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 –75dB, it naturally
shields the downstream electronics against choppy lines.
Features
• Ultra low–noise: 150nV/√Hz @ 100Hz, 40µVRMS 100Hz – 100kHz
typical, Iout = 60mA, Co=1µF
• Fast response time from OFF to ON: 40µs typical at a 200Hz
repetition rate
• Ready for 1V platforms: ON with a 900mVhigh level
• Nominal output current of 80mA with a 100mA peak capability
• Typical dropout of 90mV @ 30mA, 160mV @ 80mA
• Ripple rejection: 70dB @ 1kHz
• 1.5% output precision @ 25°C
• Thermal shutdown
• Vout available from 2.5V to 5.0V
Applications
• Noise sensitive circuits: VCOs RF stages etc.
• Bursting systems (TDMA phones)
• All battery operated devices
ON/
OFF 3
On/Off
NC
4
Band Gap
Reference
Thermal
Shutdown
1 Vin
http://onsemi.com
5
1
TSOP–5
SN SUFFIX
CASE 483
PIN CONNECTIONS AND
MARKING DIAGRAM
Vin 1
GND 2
ON/OFF 3
5 Vout
4 NC
xx = Version
YW = Date Code
(Top View)
*Current Limit
*Antisaturation Protection
*Load Transient Improvement
2
GND
5 Vout
Simplified Block Diagram
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
© Semiconductor Components Industries, LLC, 1999
November, 1999 – Rev. 0
1
Publication Order Number:
MC33761/D
1 page  
MC33761
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
Characterization Curves
All curves taken with Vin = Vout + 1 V, Vout = 2.8 V, Cout = 1 mF
–40°C
25°C
85°C
185
180
175
170
20 40 60 80
OUTPUT CURRENT (mA)
Figure 1. Ground Current versus
Output Current
165
100 –60 –40 –20 0
20 40 60 80 100
AMBIENT TEMPERATURE (°C)
Figure 2. Quiescent Current versus
Temperature
200 2.805
150
100
50
0
0
85°C
25°C
–40°C
2.800 85°C
2.795
2.790
2.785
40°C
25°C
0°C
20 40 60 80
OUTPUT CURRENT (mA)
2.780
2.775
100 0
–20°C
–40°C
20 40 60 80
OUTPUT CURRENT (mA)
100
Figure 3. Dropout versus Output Current
Figure 4. Output Voltage versus
Output Current
180
80 mA
160
140 60 mA
120
100 30 mA
80
60
40
20
0
–60 –40
1 mA
–20 0 20 40 60
TEMPERATURE (°C)
80
Figure 5. Dropout versus Temperature
100
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5
5 Page 
MC33761
TYPICAL TRANSIENT RESPONSES
250
Vin = Vout + 1 V
TA = 25°C
200 Cout = 1 mF
RMS Noise, IO = 50 mA:
20 Hz – 100 kHz: 27 mV
20 Hz – 1 MHz: 30 mV
150 IO = 50 mA
10 mA
100
50
RMS Noise, IO = 10 mA:
20 Hz – 100 kHz: 29 mV
20 Hz – 1 MHz: 31 mV
0
100
1,000
10,000
100,000
f, FREQUENCY (Hz)
1,000,000
Figure 17. MC33761 Typical Noise Density Performance
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
100
IO = 50 mA
10 mA
Vin = VO + 1 V
TA = 25°C
Cout = 1 mF
1,000
10,000
100,000
f, FREQUENCY (Hz)
1,000,000
Figure 18. MC33761 Typical Ripple Rejection
Performance
3.5
3.0 IO = 1 mA
2.5
2.0 10 mA
1.5
1.0 80 mA
0.5
0
100
20 mA
1,000
10,000
100,000 1,000,000
f, FREQUENCY (Hz)
Figure 19. Typical Output Impedance plot
Cout = 1µF, Vin = Vout + 1
Device
MC33761SNT1–25
MC33761SNT1–28
MC33761SNT1–30
ORDERING INFORMATION
Voltage Output
Package
2.5V
TSOP–5
2.8V
TSOP–5
3.0V
TSOP–5
Shipping
3000 Units / Tape & Reel
3000 Units / Tape & Reel
3000 Units / Tape & Reel
http://onsemi.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MC33761.PDF ] | |
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