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The RT6250A/B is a simple, easy-to-use, 10A synchronous step-down DC-DC converter with an input supply voltage range of 4.5V to 18V. The device build-in an accurate 0.6V reference voltage and integrates low R<sub>DS(ON)</sub> power MOSFETs to achieve high efficiency in a UQFN-12HL 3x3 package. The RT6250A/B adopts Advanced Constant On-Time (ACOT<sup>®</sup>) control architecture to provide an ultrafast transient response with few external components and to operate in nearly constant switching frequency over the line, load, and output voltage range. The RT6250A/B operates in automatic PSM that maintains high efficiency during light load operation. The RT6250A/B operates in Forced PWM that helps meet tight voltage regulation accuracy requirements. The RT6250A/B senses both FETs current for a robust over-current protection. It features cycle-by-cycle current limit protection and prevent the device from the catastrophic damage in output short circuit, over current or inductor saturation. A built-in soft-start function prevents inrush current during start-up. The device also includes input under-voltage lockout, output under-voltage protection, over-voltage protection, and over-temperature protection (thermal shutdown) to provide safe and smooth operation in all operating conditions. The RT6250A/B is offered in a UQFN-12HL 3x3 (FC) package.
RT6250A/RT6250B Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>10A Converter With Built-in 20mΩ/10mΩ Low R<sub>DS(ON)</sub> Power FETs </li><li>Input Supply Voltage Range : 4.5V to 18V </li><li>Output Voltage Range : 0.6V to 6V </li><li>Advanced Constant On-Time (ACOT<sup>®</sup>) Control <ul class="lv2"> <li></li><li>Ultrafast Transient Response </li><li>No Needs for External Compensations </li><li>Optimized for Low-ESR Ceramic Output Capacitors </li></ul> </li><li>0.6V ±1% High-Accuracy Feedback Reference Voltage </li><li>Optional for Operation Modes : <ul class="lv2"> <li></li><li>Power Saving Mode (PSM) (RT6250A) </li><li>Forced PWM Mode (RT6250B) </li></ul> </li><li>Fixed Switching Frequency : 500kHz </li><li>Built-in Internally Fixed Soft-Start (Typ. 0.4ms) </li><li>Input Under-Voltage Lockout (UVLO) </li><li>Output Under-Voltage Protection (UVP) with Hiccup Mode </li><li>Output Over-Voltage Protection (OVP) with Auto-Recovery Mode </li><li>Ultrasonic Mode (USM) for RT6250A </li><li>Available in UQFN-12HL 3x3 (FC) Package </li></ul></div>
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RT6250A/RT6250B Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Industrial and Commercial Low Power Systems </li><li>Computer Peripherals </li><li>LCD Monitors and TVs </li><li>Green Electronics/Appliances </li><li>Point of Load Regulation for High-Performance DSPs, FPGAs, and ASICs </li><li>Networking Communication </li></ul></div>
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