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TPS54318RTET Datasheet(PDF) 10 Page - Texas Instruments

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No. de pieza TPS54318RTET
Descripción Electrónicos  2.95V To 6V Input, 3A Output, 2MHz, Synchronous Step Down Switcher With Integrated FETs ( SWIFT??
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

TPS54318RTET Datasheet(HTML) 10 Page - Texas Instruments

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-InputVoltage-V
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T =25°C
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TPS54318
SLVS975 – SEPTEMBER 2009 ......................................................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS CURVES (continued)
SUPPLY CURRENT vs INPUT VOLTAGE
PWRGD THRESHOLD vs TEMPERATURE
Figure 19.
Figure 20.
PWRGD ON RESISTANCE vs TEMPERATURE
Figure 21.
OVERVIEW
The TPS54318 is a 6-V, 3-A, synchronous step-down (buck) converter with two integrated n-channel MOSFETs.
To improve performance during line and load transients the device implements a constant frequency, peak
current mode control which reduces output capacitance and simplifies external frequency compensation design.
The wide switching frequency of 200 kHz to 2000 kHz allows for efficiency and size optimization when selecting
the output filter components. The switching frequency is adjusted using a resistor to ground on the RT/CLK pin.
The device has an internal phase lock loop (PLL) on the RT/CLK pin that is used to synchronize the power
switch turn on to a falling edge of an external system clock.
The TPS54318 has a typical default start up voltage of 2.6 V. The EN pin has an internal pull-up current source
that can be used to adjust the input voltage under voltage lockout (UVLO) with two external resistors. In addition,
the pull up current provides a default condition when the EN pin is floating for the device to operate. The total
operating current for the TPS54318 is 350
μA when not switching and under no load. When the device is
disabled, the supply current is less than 5
μA.
The integrated 30 m
Ω MOSFETs allow for high efficiency power supply designs with continuous output currents
up to 3 amperes.
10
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Product Folder Link(s) :TPS54318


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