RT5760A Datasheet | Richtek

RT5760A/B/C/D 6V 1A, ACOT® Buck Converter in Thin SOT-563 Package General Description The RT5760A/B/C/D is a simple, easy-to-use, 1A synchronous step-down DC-DC converter with an input supply voltage range from 2.5V to 6V. The device build-in an accurate 0.6V reference voltage and integrates low RDS(ON) power MOSFETs to achieve high efficiency in a SOT-563 (FC) package. The RT5760A/B/C/D adopts Advanced Constant On-Time (ACOT® ) control architecture to provide an ultrafast transient response with few external ponents and to operate in nearly constant switching frequency over the line, load, and output voltage range. The RT5760A/C operate in automatic PSM that maintain high efficiency during light load operation. The RT5760B/D operate in Forced PWM that help to meet tight voltage regulation accuracy requirements. The RT5760A/B/C/D senses both FETs current for a robust over-current protection. The device 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, and over-temperature protection to provide safe and smooth operation in all operating conditions. Features - Input Voltage Range from 2.5V to 6V - Integrated 120m and 80m FETs - 1A Output Current, up to 95% Efficiency - 100% Duty Cycle for Lowest Dropout - 1% Internal Reference Voltage - 2.2MHz Typical Switching Frequency - Power Saving Mode for Light Loads (RT5760A/C) - Low Quiescent Current: 25A (Typ.) - Fast Advanced Constant On-Time (ACOT® ) Control - Internal Soft Startup (0.6ms) - Enable Control Input - Power Good Indicator (RT5760A/B) - Both FETs Over-Current Protection - Negative Over-Current Protection (RT5760B/D) - Input Under-Voltage Lockout Protection - Hiccup-Mode Output Under-Voltage Protection - Over-Temperature Protection - Ro...