MAX1540A
Overview
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.
- 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 S
