The MAX1762/MAX1791 PWM step-down controllers provide high efficiency, excellent transient response, and high DC output accuracy needed for stepping down, high-voltage batteries to generate low-voltage CPU core, I/O, and chipset RAM supplies in notebook computers and PDAs. Maxim's proprietary Quick-PWM™ pulse-width modulator is a free-running constant on-time type with input feed-forward. Its high operating frequency (300kHz) allows small external components to be utilized in PC board area-critical applications such as subnotebook computers and smart phones. PWM operation occurs at heavy loads, and automatic switchover to pulse-skipping operation occurs at lighter loads. The external high-side p-channel and low-side n-channel MOSFETs require no bootstrap components. The MAX1762/MAX1791 are simple, easy to compensate, and do not have the noise sensitivity of conventional fixed-frequency current-mode PWMs. These devices achieve high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by their ability to drive synchronous-rectifier MOSFETs. The MAX1762/MAX1791 come in a 10-pin µMAX® package and offer two fixed voltages (Dual Mode™) for each device, 1.8V/2.5V/adj (MAX1762) and 3.3V/5.0V/adj (MAX1791). Applications * 2-Way Pagers * Analog Cellular Phones * Digital Cellular Phones * Digital Still Cameras * Notebook Computers * High Operating Frequency (300kHz) * No Current-Sense Resistor * Accurate Current Limit * ±1% Total DC Error over Line and During Continuous Conduction * Dual Mode Fixed Output * 1.8V/2.5V/adj (MAX1762) * 3.3V/5.0V/adj (MAX1791) * 0.5V to 5.5V Output Adjust Range * 5V to 20V Input Range * Automatic Light-Load Pulse Skipping Operation * Free-Running On-Demand PWM * Foldback Mode™ UVLO * PFET/NFET Synchronous Buck * 4.65V at 25mA Linear Regulator Output * 5µA Shutdown Supply Current * 230µA Quiescent Supply Current * 10-Pin µMAX Package https://elecena.pl/product/22319443/high-efficiency-10-pin-max-step-down-controllers-for-notebooks 2022-12-27 https://elecena.pl/product/22319443/high-efficiency-10-pin-max-step-down-controllers-for-notebooks 2025-01-21