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TS2508CSRL Fiches technique(PDF) 3 Page - Taiwan Semiconductor Company, Ltd

No de pièce TS2508CSRL
Description  2A / 330KHz PWM Buck Converter
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Fabricant  TSC [Taiwan Semiconductor Company, Ltd]
Site Internet  http://www.taiwansemi.com
Logo TSC - Taiwan Semiconductor Company, Ltd

TS2508CSRL Fiches technique(HTML) 3 Page - Taiwan Semiconductor Company, Ltd

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TS2508
2A / 330KHz PWM Buck Converter
3/8
Version: B07
Application Circuit
Typical Circuit
L1 recommend value (VIN=12V, IOUT=2A )
VOUT
1.8V
2.5V
3.3V
5V
L1 Value
18uH
22uH
27uH
33uH
Function Descriptions
PWM Control
The TS2508 consists of DC/DC converters that employ a pulse-width modulation (PWM) system. In converters of the
TS2508, the pulse width varies in a range from 0 to 100%, according to the load current. The ripple voltage produced
by the switching can easily be removed through a filter because the switching frequency remains constant. Therefore,
these converters provide a low-ripple power over broad ranges of input voltage and load current.
RDS(ON) Current Limiting
The current limit threshold is setting by the external resistor (R3) connecting from VCC supply to OCSET pin. The
internal 110uA sink current crossing the resistor sets the voltage at pin of OCSET. When the PWM voltage is less than
the voltage at OCSET, an over-current condition is triggered. Please refer to the formula for setting the minimum
current limit value:
(Normally, The ISW(MAX) setting more than IOUT 1.2A)
Example: ISW=(0.11mA * 2k + 0.08) / 70mΩ = 3.2A – (VIN=12V)
ISW=(0.11mA * 3.3k + 0.08) / 1000mΩ = 3.5A – (VIN=5V)


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