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TS29153 データシート(PDF) 5 Page - Taiwan Semiconductor Company, Ltd

部品番号 TS29153
部品情報  1.5A Ultra Low Dropout Voltage Regulator with Multi-Function
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メーカー  TSC [Taiwan Semiconductor Company, Ltd]
ホームページ  http://www.taiwansemi.com
Logo TSC - Taiwan Semiconductor Company, Ltd

TS29153 データシート(HTML) 5 Page - Taiwan Semiconductor Company, Ltd

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TS29150/1/2/3
1.5A Ultra Low Dropout Voltage Regulator
with Multi-Function
5/11
Version: A07
Typical Application Circuit
The TS29150/1/2/3 series are high performance with low dropout voltage regulator suitable for moderate to high
current and voltage regulator application. Its 350mA(typ) 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 TS29150/1/2/3 series 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.
Capacitor Requirement
The TS29150/1/2/3 series 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.
TS29150/1/2/3 series regulators are stable with the 10uF minimum capacitor value at full load. Where the regulator
is powered from a source with high AC impedance, a 0.1uF capacitor connected between input and ground is
recommended. The capacitor should have good characteristics to above 250KHz. The capacitance values will be
help to improved transient response, ripple rejection and output noise.
Minimum Load Current
The TS29150/1/2/3 series 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 swamps any expected leakage current across
the operating temperature range.
Thermal Characteristics
TS29150/1/2/3 series linear regulators are simple to use, the most complicated design parameters to consider are
thermal characteristics, thermal design requires the following application specification parameters:
* Maximum ambient temperature, Ta
* Output current, IOUT
* Output voltage, VOUT
* Input voltage, VIN
We calculate the power dissipation of the regulator from these numbers and the device parameters from this data
sheet. A heatsink may be required depending on the maximum power dissipation and maximum ambient
temperature of the application. Under all possible operating conditions, the junction temperature must be within the
range specified under absolute maximum ratings. To determine if the heatsink is required, the power dissipated by
the regulator, PD must be calculated.
The below formula shows the voltages and currents for calculating the PD in the regulator:
IIN = IL / IG
PD = (VIN - VOUT) * IL + (VIN) * IG
Ex. PD = (3.3V-2.5V) * 0.5A + 3.3V * 11mA
= 400mW + 36mW
= 436mW
Remark: IL is output load current,
IG is ground current.
VIN is input voltage
VOUT is output voltage


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