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L6726ATR Datasheet(PDF) 9 Page - STMicroelectronics |
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L6726ATR Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 24 page L6726A Device description 9/24 4 Device description L6726A is a single-phase PWM controller with embedded high-current drivers that provides complete control logic and protections to realize in an easy and simple way a general DC- DC step-down converter. Designed to drive N-channel MOSFETs in a synchronous buck topology, with its high level of integration this 8-pin device allows reducing cost and size of the power supply solution. L6726A is designed to operate from a 5V or 12V supply bus. Thanks to the high precision 0.8V internal reference, the output voltage can be precisely regulated to as low as 0.8V with ±1% accuracy over line and temperature variations (between 0°C and +70°C). The switching frequency is internally set to 270kHz. This device provides a simple control loop with externally compensated transconductance error-amplifier and programmable soft start. Low-Side-Less feature allows the device to perform soft-start over pre-charged output avoiding negative spikes at the load side. In order to avoid load damages, L6726A provides programmable threshold over current protection. Output current is monitored across Low-Side MOSFET RdsON, saving the use of expensive and space-consuming sense resistor. L6726A also features FB disconnection protection, preventing dangerous uncontrolled output voltages in case of floating FB pin. |
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