cs5201-1gstr3g ON Semiconductor, cs5201-1gstr3g Datasheet - Page 4

• Manufacturer Part Number: cs5201-1gstr3g
• Description: 1.0 A Adjustable Linear Regulator
• Manufacturer: ON Semiconductor

at currents up to 1.0 A. The regulator is protected against
overcurrent conditions and includes thermal shutdown.
transistor and requires an output capacitor for stability. A
detailed procedure for selecting this capacitor is included in
the Stability Considerations section.
Adjustable Operation
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.
The CS5201−1 linear regulator provides adjustable voltages
The CS5201−1 has a composite PNP−NPN output
The CS5201−1 has an output voltage range of 1.25 V to
−100
−200
1000
70
65
60
55
50
45
40
300
200
100
500
0
0
0
0
I
10
O
= 10 mA
1
20 30 40 50 60 70 80 90 100 110 120 130
Figure 7. Adjust Pin Current vs.
Figure 9. Transient Response
2
3
Temperature (°C)
Temperature
V
C
C
OUT
OUT
Adj
4
Time (mS)
= 0.1 mF
= 3.3 V
= C
5
IN
= 22 mF Tantalum
6
7
APPLICATIONS INFORMATION
8
http://onsemi.com
9
10
4
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 V
pin current.
A resistor divider network R1 and R2 causes a fixed current
The output voltage is set according to the formula:
The term I
3.5
3.3
3.1
2.9
2.7
2.5
2.3
2.1
1.9
1.7
1.5
85
75
65
55
45
35
25
15
10
1.0
V OUT + V REF
1
Figure 8. Ripple Rejection vs. Frequency
Adj
T
I
(V
V
C
OUT
CASE
Figure 10. Short Circuit Current vs.
RIPPLE
Adj
IN
1.5
× R2 represents the error added by the adjust
− V
10
= 0.1 mF
= 1.0 A
= 25°C
2
OUT
= 1.0 V
) = 3.0 V
2.0
Frequency (Hz)
V
10
PP
V
IN
R1 ) R2
IN
3
− V
− V
R1
2.5
OUT
OUT
OUT
10
(V)
) I Adj
4
is necessary.
3.0
10
3.5
5
R2
10
4.0
6