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TS39100CP25ROG Arkusz danych(PDF) 3 Page - Taiwan Semiconductor Company, Ltd

Numer części TS39100CP25ROG
Szczegółowy opis  1A Ultra Low Dropout Voltage Regulator
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Producent  TSC [Taiwan Semiconductor Company, Ltd]
Strona internetowa  http://www.taiwansemi.com
Logo TSC - Taiwan Semiconductor Company, Ltd

TS39100CP25ROG Arkusz danych(HTML) 3 Page - Taiwan Semiconductor Company, Ltd

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TS39100
1A Ultra Low Dropout Voltage Regulator
3/7
Version: C11
Functional Diagram
Application Information
The TS39100 are high performance with low dropout voltage regulator suitable for moderate to high current and
voltage regulator application. Its 630mV dropout voltage at full load and over temperature makes it especially
valuable in battery power systems and as high efficiency noise filters in post regulator applications. Unlike normal
NPN transistor design, where the base to emitter voltage drop and collector to emitter saturation voltage limit the
minimum dropout voltage, dropout performance of the PNP output of these devices is limited only by low VCE
saturation voltage.
The TS39100 is fully protected from damage due to fault conditions. Linear current limiting is provided. Output
current during overload conditions is constant. Thermal shutdown the device when the die temperature exceeds
the maximum safe operating temperature. Transient protection allows device survival even when the input voltage
spikes above and below nominal. The output structure of these regulators allows voltages in excess of the desired
output voltage to be applied without reverse current flow.
Output Capacitor Requirement
The TS39100 requires an output capacitor to maintain stability and improve transient response is necessary. The
value of this capacitor is dependent upon the output current, lower currents allow smaller capacitors. TS39100
output capacitor selection is dependent upon the ESR of the output capacitor to maintain stability. When the output
capacitor is 10uF or greater, the output capacitor should have an ESR less than 2Ω. This will improve transient
response as well as promote stability. Ultra low ESR capacitors (<100mΩ), such as ceramic chip capacitors, may
promote instability. These very low ESR levels may cause an oscillation and/or under damped transient response.
A low ESR solid tantalum capacitor works extremely well and provides good transient response and stability over
temperature aluminum electrolytes can also be used, as long as the ESR of the capacitor is <2Ω. The value of the
output capacitor can be increased without limit. Higher capacitance values help to improve transient response and
ripple rejection and reduce output noise.
Input Capacitor Requirement
An input capacitor of 1uF or greater is recommended when the device is more than 4” away from the bulk AC
supply capacitance or when the supply is a battery. Small, surface mount, ceramic chip capacitors can be used for
bypassing. Larger values will help to improve ripple rejection by bypassing the input to the regulator, further
improving the integrity of the output voltage.
Minimum Load Current
The TS39100 is specified between finite loads. If the output current is too small leakage currents dominate and the
output voltage rises. A 10mA minimum load current is necessary for proper regulation.


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