Part # MAX8855 datasheet

Part Manufacturer: Maxim

Maxim

Part Description: MAX8855 DS


Part Details:

19-0726; Rev 1; 6/08 EVALUATION KIT AVAILABLE Dual, 5A, 2MHz Step-Down Regulator MAX8855 General Description Features The MAX8855 high-efficiency, dual step-down regulator 27m On-Resistance Internal MOSFETs is capable of delivering up to 5A at each output. The Dual, 5A, PWM Step-Down Regulators device operates from a 2.35V to 3.6V supply, and pro- Fully Protected Against Overcurrent, vides output voltages from 0.6V to 0.9 x VIN, making it Short Circuit, and Overtemperature ideal for on-board point-of-load applications. Total output ±1% Output Accuracy over Load, Line, error is less than ±1% over load, line, and temperature. and Temperature The MAX8855 operates in PWM mode with a switching Operates from 2.35V to 3.6V Supply frequency ranging from 0.5MHz to 2MHz, set by an REFIN on One Channel for Tracking or external resistor. It can also be synchronized to an External Reference external clock in the same frequency range. Two inter- Integrated Boost Diodes nal switching regulators operate 180° out-of-phase to Adjustable Output from 0.6V to 0.9 x VIN reduce the input ripple current, and consequently Soft-Start Reduces Inrush Supply Current reduce the required input capacitance. The high operating frequency minimizes the size of external 0.5MHz to 2MHz Adjustable Switching, or FSYNC Input components. High efficiency, internal dual-nMOSdesign keeps the board cool under heavy loads. The All-Ceramic-Capacitor Design voltage-mode control architecture and the high-band- 180° Out-of-Phase Operation Reduces Input width (> 15MHz typ) voltage-error amplifier allow a type Ripple Current III compensation scheme to be utilized to achieve fast Individual Enable Inputs and PWRGD Outputs response under both line and load transients, and also Available in 5mm x 5mm Thin QFN Package allow for ceramic output capacitors. Sink/Source Current in DDR Applications Programmable soft-start reduces input inrush current.Two enable inputs allow the turning on/off of each out- Ordering Information put individually, resulting in great flexibility for system-level designs. A reference input is provided to facilitate PART TEMP RANGE PIN-PACKAGE output-voltage tracking applications. The MAX8855 is 32 Thin QFN MAX8855ETJ+


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MAX8855.pdf Datasheet