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CS5201-1GDPR3 Folha de dados(PDF) 4 Page - ON Semiconductor

Nome de Peças CS5201-1GDPR3
Descrição Electrónicos  1.0 A Adjustable Linear Regulator
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Fabricante Electrônico  ONSEMI [ON Semiconductor]
Página de início  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS5201-1GDPR3 Folha de dados(HTML) 4 Page - ON Semiconductor

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CS5201−1
http://onsemi.com
4
10
Temperature (°C)
Frequency (Hz)
Figure 7. Adjust Pin Current vs.
Temperature
Figure 8. Ripple Rejection vs. Frequency
Time (mS)
VIN − VOUT (V)
Figure 9. Transient Response
Figure 10. Short Circuit Current vs.
VIN − VOUT
85
101
3.5
300
0
70
65
60
55
50
45
40
0
20 30 40 50 60 70 80 90 100 110 120 130
75
65
55
45
35
25
15
102
103
104
105
106
3.3
3.1
2.9
2.7
2.5
2.3
2.1
1.9
1.7
1.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
200
100
0
−100
−200
1000
500
0
12
345
67
89
10
IO = 10 mA
TCASE = 25°C
IOUT = 1.0 A
(VIN − VOUT) = 3.0 V
VRIPPLE = 1.0 VPP
CAdj = 0.1 mF
VOUT = 3.3 V
COUT = CIN = 22 mF Tantalum
CAdj = 0.1 mF
APPLICATIONS INFORMATION
The CS5201−1 linear regulator provides adjustable voltages
at currents up to 1.0 A. The regulator is protected against
overcurrent conditions and includes thermal shutdown.
The CS5201−1 has a composite PNP−NPN output
transistor and requires an output capacitor for stability. A
detailed procedure for selecting this capacitor is included in
the Stability Considerations section.
Adjustable Operation
The CS5201−1 has an output voltage range of 1.25 V to
5.5 V. An external resistor divider sets the output voltage as
shown in Figure 11. The regulator maintains a fixed 1.25 V
(typical) reference between the output pin and the adjust pin.
A resistor divider network R1 and R2 causes a fixed current
to flow to ground. This current creates a voltage across R2
that adds to the 1.25 V across R1 and sets the overall output
voltage. The adjust pin current (typically 50
mA) also flows
through R2 and adds a small error that should be taken into
account if precise adjustment of VOUT is necessary.
The output voltage is set according to the formula:
VOUT + VREF
R1 ) R2
R1
) IAdj
R2
The term IAdj × R2 represents the error added by the adjust
pin current.


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