CS9201 ON Semiconductor, CS9201 Datasheet - Page 4

• Manufacturer Part Number: CS9201
• Description: Micropower 5v, 100ma Low Dropout Linear Regulator With Nocap(tm)
• Manufacturer: ON Semiconductor

Output Stage Protection
circuit and thermal runaway conditions (Figure 8).
down. This response protects the internal circuitry and
enables the IC to survive unexpected voltage transients.
exceed 180 C (typ) the power transistor is turned off.
Thermal shutdown is an effective means to prevent die
overheating since the power transistor is the principle heat
source in the IC.
(or any type requiring a slow lateral PNP in the control loop)
necessitates a large external compensation capacitor at the
output of the IC. The external capacitor is also used to curtail
overshoot, determine startup delay time and load transient
response.
bandwidth, display overshoot and poor ripple rejection.
Compensation is also an issue and depends on the external
capacitor value, ESR (Equivalent Series Resistance) and
board layout parasitics that all can create oscillations if not
properly accounted for.
The output stage is protected against overvoltage, short
If the input voltage rises above 32 V (typ), the output shuts
Should the junction temperature of the power device
Normally a low dropout or quasi–low dropout regulator
Traditional LDO regulators typically have low unity gain
STABILITY CONSIDERATIONS / NOCAP
VOLTAGE REFERENCE AND OUTPUT
* C1 is required if regulator is distant from power source filter.
CIRCUITRY
C
0.1 F
1
*
Figure 9. Application and Test Diagram
CIRCUIT DESCRIPTION
APPLICATION NOTES
V
http://onsemi.com
IN
CS9201
CS9201
GND
4
which internally compensates the LDO regulator over
temperature, load and line variations without the need for an
expensive external capacitor
loads. If the load is characterized by transient current events,
an output storage capacitor may be needed. If this is the case,
the capacitor should be no larger than 100 nF. With loads
that require greater transient suppression, a regulator with a
traditional output stage (such as the CS8221) may be better
suited for proper operation.
V
I
OUT
OUT
NOCAP is an ON Semiconductor exclusive output stage
NOCAP is ideally suited for slow switching or steady
V
V
IN
OUT
Figure 8. Typical Circuit Waveforms for Output
> 32 V
Dump
Load
Stage Protection
Circuit
Short
Shutdown
Thermal