TPS5124

TPS5124 双通道同步步降 PWM 控制器

The is dual independent high efficiency synchronous step-down controller. It supports a low-voltage/high-current power supply applications that use either a 5-V or 12-V bus voltage. Since both controllers of the TPS5124 operate 180 degree out-of-phase, the input current ripple is minimized resulting in a smaller input capacitance and reduced power supply cost.

The current protection circuit detects the drain-to-source voltage drop across the high-side and low-side power MOSFET while it is conducting. Also, the current protection circuit has a temperature coefficient to compensate for the RDSon variation of the MOSFET. This resistor-less current protection and built-in boost diode simplify the system design and reduces the external parts count. Other features such as undervoltage lockout, overvoltage, undervoltage, and programmable short-circuit protection promote system reliability.

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High Efficiency – No Current Sense Resistor Required, RDSon Overcurrent Detection with Temperature Compensation

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Adjustable Output Voltage Down to 0.9 V

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Voltage-Mode PWM Control: Maximum 500-kHz Operation

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180° Out-of-Phase Control

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Individual Standby and Soft-Start for Each Channel - Easy Power Sequencing

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Overvoltage and Undervoltage Protection

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Built-In Boot-Strap Diode

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Built-In 5-V Linear Regulator

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Accurate ± 1% 0.85-V Reference

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APPLICA ONS

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Consumer Game Systems

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DSP Applications

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Digital Set-Top Box

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VGA and Sound Cards