High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers
●The ISL6236A dual step-down, switch-mode power-supply (SMPS) controller generates logic-supply voltages in
●battery-powered systems. The ISL6236A includes two pulse-width modulation (PWM) controllers, 5V/3.3V and
●1.5V/1.05V. The output of SMPS1 can also be adjusted from 0.7V to 5.5V. The SMPS2 output can be adjusted from 0V to 2.5V by setting REFIN2 voltage.
●Features
●• Wide Input Voltage Range 4.5V to 25V
●• Dual Fixed 1.05V/3.3V and 1.5V/5.0V Outputs or Adjustable 0.7V to 5.5V (SMPS1) and 0V to 2.5V (SMPS2), ±1.5% Accuracy
●• Secondary Feedback Input (Maintains Charge Pump Voltage)
●• 1.7ms Digital Soft-Start and Independent Shutdown
●• Fixed 3.3V/5.0V, or Adjustable Output 0.7V to 4.5V, ±1.5% (LDO): 200mA
●• 3.3V Reference Voltage ±2.0%: 5mA
●• 2.0V Reference Voltage ±1.0%: 50µA
●• Constant ON-TIME Control with 100ns Load-Step Response
●• Frequency Selectable
●•rDS(ON) Current Sensing
●• Programmable Current Limit with Foldback Capability
●• Selectable PWM, Skip or Ultrasonic Mode
●• BOOT Voltage Monitor with Automatic Refresh
●• Independent POK1 and POK2 Comparators
●• Soft-Start with Pre-Biased Output and Soft-Stop
●• Independent ENABLE
●• High Efficiency - up to 97%
●• Very High Light Load Efficiency (Skip Mode)
●• 5mW Quiescent Power Dissipation
●• Thermal Shutdown
●• Extremely Low Component Count
●• Pb-Free Plus Anneal Available (RoHS Compliant)
●Applications
●• Notebook and Sub-Notebook Computers
●• PDAs and Mobile Communication Devices
●• 3-Cell and 4-Cell Li+ Battery-Powered Devices
●• DDR1, DDR2, and DDR3 Power Supplies
●• Graphic Cards
●• Game Consoles
●• Telecommunications
