ADP1864AUJZ-R7

ADP1864 is a constant frequency current-mode step-down DC-to-DC controller. It provides system flexibility by allowing accurate setting of the current limit with an external resistor, and the output voltage is easily adjustable using two external resistors. It includes an internal soft start to allow quick power-up while preventing input inrush current. Additional safety features include short-circuit protection, output overvoltage protection, and input undervoltage protection. Current-mode control provides fast and stable load transient performance, while the 580KHz operating frequency allows a small inductor to be used in the system. To further the life of a battery source, the controller turns on the external P-channel MOSFET 100% of the duty cycle during dropout. Application includes wireless devices, 1- to 3-cell Li-Ion battery-powered applications, set-top boxes, processor core power supplies, hard disk drives.

• Input voltage range from 3.15 to 14V (VIN = 5V, TJ = 25°C)
• Wide output voltage range 0.8V to input voltage
• Up to 94% efficiency, 0.8V ± 1.25% reference accuracy over temperature
• Internal soft start, 100% duty cycle for low dropout voltage
• Current-mode operation for good line and load transient response
• 7μA shutdown supply current, 235μA quiescent supply current
• Short-circuit and overvoltage protection
• Supported by ADIsimPower™ design tool
• Peak current sense voltage is 125mV (typ, TJ = -40°C to +125°C)
• 6 lead TSOT package, temperature range from -40°C to +125°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party