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CS8101 Datasheet(PDF) 5 Page - ON Semiconductor

Part No. CS8101
Description  Micropower 5.0 V, 100 mA Low Dropout Linear Regulator with RESET and ENABLE
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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CS8101 Datasheet(HTML) 5 Page - ON Semiconductor

 
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CS8101
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5
TYPICAL PERFORMANCE CHARACTERISTICS
Load (mA)
0
10
20
3040
5060
7080
Figure 2. CS8101 Dropout Voltage vs. Load Over Temperature
0.6
0.5
0.4
0.3
0.2
0.1
0
25
°C
90
100
125 C
−40
°C
°
CIRCUIT DESCRIPTION
VOLTAGE REFERENCE AND OUTPUT CIRCUITRY
Output Stage Protection
The output stage is protected against overvoltage, short
circuit and thermal runaway conditions (Figure 3).
Figure 3. Typical Circuit Waveforms for Output
Stage Protection
IOUT
Load
Dump
VIN
VOUT
Current
Limit
Short
Circuit
> 30 V
If the input voltage rises above 30 V (e.g. load dump), the
output shuts down. This response protects the internal
circuitry and enables the IC to survive unexpected voltage
transients.
Should the junction temperature of the power device
exceed 180
°C (typ) the load current capability is reduced
thereby
preventing thermal overload. This thermal
management function is an effective means to prevent die
overheating since the load current is the principle heat
source in the IC.
REGULATOR CONTROL FUNCTIONS
The CS8101 contains two microprocessor compatible
control functions: ENABLE and RESET (Figure 4).
Figure 4. Circuit Waveform
(1) = No Reset Delay Capacitor
VIN
VOUT
ENABLE
RESET
(2) = With Reset Delay Capacitor
VRLO
VRPEAK
VRPEAK
For 7.0 V < VIN < 26 V
VIN(H)
VRH
VRL
(1)
(2)
ENABLE Function
The ENABLE function switches the output transistor ON
and OFF. When the voltage on the ENABLE lead exceeds
1.4 V typ, the output pass transistor turns off, leaving a high
impedance facing the load. The IC will remain in Sleep
mode, drawing only 50
mA, until the voltage on this input
drops below the ENABLE threshold.
RESET Function
A RESET signal (low voltage) is generated as the IC
powers up until VOUT is within 250 mV of the regulated
output voltage, or when VOUT drops out of regulation, and
is lower than 300 mV below the regulated output voltage. A
hysteresis of 50 mV is included in the function to minimize
oscillations.


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