The MAX1540A/MAX1541 dual pulse-width modulation (PWM) controllers provide the high efficiency, excellent transient response, and high DC-output accuracy necessary for stepping down high-voltage batteries to generate low-voltage chipset and RAM power supplies in notebook computers. The Maxim proprietary Quick-PWM™ controllers are free running, constant on-time with input feed forward. This configuration provides ultra-fast transient response, wide input-output (I/O) differential range, low supply current, and tight load-regulation characteristics. The controllers can accurately sense the inductor current across an external current-sense resistor in series with the output to ensure reliable overload and inductor saturation protection. Alternatively, the controllers can use the synchronous rectifier itself or lossless inductor current-sensing methods to provide overload protection with lower power dissipation. For a single step-down PWM controller with inductor-saturation protection, external-reference input voltage, and dynamically selectable output voltages, refer to the MAX1992/MAX1993 data sheet. Applications * 0.7V to 5.5V Supply Rails * Active Termination Buses (MAX1541) * Core/IO Supplies as Low as 0.7V * CPU/Chipset/GPU with Dynamic Voltage Cores * DDR Memory Termination (MAX1541) * Notebook Computers * Supplies (MAX1541) * Inductor-Saturation Protection * Accurate Differential Current-Sense Inputs * Dual Ultra-High-Efficiency Quick-PWMs with 100ns Load-Step Response * MAX1540A * 1.8V/1.2V Fixed or 0.7V to 5.5V Adjustable Output (OUT1) * 2.5V/1.5V Fixed or 0.7V to 5.5V Adjustable Output (OUT2) * Fixed 5V, 100mA Linear Regulator * MAX1541 * External Reference Input (REFIN1) * Dynamically Selectable Output Voltage—0.7V to 5.5V (OUT1) * 2.5V/1.8V Fixed or 0.7V to 5.5V Adjustable Output (OUT2) * Optional Power-Good and Fault Blanking During Transitions * Fixed 5V or Adjustable 100mA Linear Regulator * 1% VOUT Accuracy over Line and Load * 2V to 28V Battery Input Range * 170kHz to 620kHz Selectable Switching Frequency * Overvoltage/Undervoltage-Protection Option * 1.7ms Digital Soft-Start * Drives Large Synchronous-Rectifier FETs * 2V ±0.7% Reference Output * Separate Power-Good Window Comparators https://elecena.pl/product/22316362/dual-step-down-controllers-with-saturation-protection-dynamic-output-and-linear-regulator 2022-12-27 https://elecena.pl/product/22316362/dual-step-down-controllers-with-saturation-protection-dynamic-output-and-linear-regulator 2025-01-21