CS8161YT5 데이터 시트보기 (PDF) - ON Semiconductor
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CS8161YT5 Datasheet PDF : 11 Pages
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CS8161
60 V
34 V
26 V
14V
VIN 14 V
3.0 V
ENABLE 2.0 V
0.8 V
VOUT1 0 V
VOUT2
0V
12 V
12 V
2.4 V
5.0 V
2.4 V
12 V
5.0 V
12 V
12 V
0V
0V
0V
5.0 V
0V
0V
Turn
On
Load
Dump
Low VIN
Line
VOUT1
Noise, Etc. Short
Circuit
Figure 17. Typical Circuit Waveform
VOUT2
Short
Circuit
VOUT1
Thermal
Shutdown
Turn
Off
APPLICATION DIAGRAM
C1*
0.1 mF
VIN
CS8161
ENABLE
VOUT1
GND
VOUT2
+ C2*
22 mF
+ C3*
22 mF
Display
Tuner
* C1 required if regulator is located far from power supply filter.
** C2, C3 required for stability, value may be increased. Capacitor must operate at minimum temperature expected.
Figure 18. Application Diagram
APPLICATION NOTES
Since both outputs are controlled by the same ENABLE,
the CS8161 is ideal for applications where a sleep mode is
required. Using the CS8161, a section of circuitry such as a
display and nonessential 5.0 V circuits can be shut down
under microprocessor control to conserve energy.
The example in the Applications Diagram (Figure 18)
shows an automotive radio application where the display is
powered by the 12 V on VOUT1 and the Tuner IC is powered
by the 5.0 V on VOUT2. Neither output is required unless both
the ignition and the Radio On/Off switch are on.
Stability Considerations
The output or compensation capacitor (Application
diagram C2 and C3) helps determine three main
characteristics of a linear regulator: startup delay, load
transient response and loop stability.
The capacitor value and type should be based on cost,
availability, size and temperature constraints. A tantalum or
aluminum electrolytic capacitor is best, since a film or
ceramic capacitor with almost zero ESR can cause
instability. The aluminum electrolytic capacitor is the
cheapest solution, but, if the circuit operates at low
temperatures (−25°C to −40°C), both the value and ESR of
the capacitor will vary considerably. The capacitor
manufacturers data sheet usually provides this information.
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