EVALUATION KIT AVAILABLE MAX18066/MAX18166 High-Efficiency, 4A, Step-Down DC-DC Regulators with Internal Power Switches General Description Benefits and Features The MAX18066/MAX18166 current-mode, synchronous, Feature Integration Shrinks Solution Size Integrated 40m (High-Side) and 18.5m DC-DC buck converters deliver an output current up (Low-Side) R Power MOSFETs DS-ON to 4A with high efficiency. The devices operate from Stable with Low-ESR Ceramic Output Capacitors an input voltage of 4.5V to 16V and provides an Enable Input and Power-Good Output adjustable output voltage from 0.606V to 90% of the Cycle-by-Cycle Overcurrent Protection input voltage. The devices are ideal for distributed power Fully Protected Against Overcurrent systems, notebook computers, nonportable consumer (Hiccup Protection) and Overtemperature applications, and preregulation applications. High Efficiency Conserves Power The devices feature a PWM mode operation with Up to 96% Efficiency (5V Input and 3.3V Output) an internally fixed switching frequency of 500kHz Up to 93% Efficiency (12V Input and 3.3V Output) (MAX18066) and 350kHz (MAX18166) capable of 90% Automatic Skip Mode During Light Loads maximum duty cycle. The devices automatically enter Safe, Reliable, Accurate Operation skip mode at light loads. The current-mode control Continuous 4A Output Current architecture simplifies compensation design and ensures 1% Output Accuracy over Load, Line, and a cycle-by-cycle current limit and fast response to line Temperature and load transients. A high-gain transconductance error Safe Startup Into Prebiased Output amplifier allows flexibility in setting the external com- Programmable Soft-Start pensation, simplifying the design and allowing for an all- V LDO Undervoltage Lockout DD ceramic design. Well Suited to Distributed Power, Networking, and The synchronous buck regulators feature inter- Computing Applications nal MOSFETs that provide better efficiency than 4.5V to 16V Input Voltage Range asynchronous solutions, while simplifying the design Adjustable Output Voltage Range from 0.606V relative to discrete controller solutions. In addition to to (0.9 x V ) IN simplifying the design, the integrated MOSFETs minimize Available in EE-Sim Design and Simulation Tool to EMI, reduce board space, and provide higher reliability by Slash Design Time minimizing the number of external components. Additional features include an externally adjustable Ordering Information appears at end of data sheet. soft-start, independent enable input and power-good output for power sequencing, and thermal shutdown Typical Application Circuit protection. The devices offer overcurrent protection (high- side sourcing) with hiccup mode during an output short- circuit condition. The devices ensure safe startup when INPUT 4.5V TO 16V powering into a prebiased output. IN BST The MAX18066/MAX18166 are available in a 2mm x 1.8V/4A OUTPUT 2mm, 16-bump (4 x 4 array), 0.5mm pitch wafer-level EN LX package (WLP) and are fully specified from -40C to MAX18066 V DD +85C. MAX18166 FB Applications COMP PGOOD Distributed Power Systems SS Preregulators for Linear Regulators GND Home Entertainment (TV and Set-Top Boxes) Network and Datacom Servers, Workstations, and Storage EE-Sim is a registered trademark of Maxim Integrated Products, Inc. 19-100202 Rev 0 11/17MAX18066/MAX18166 High-Efficiency, 4A, Step-Down DC-DC Regulators with Internal Power Switches Absolute Maximum Ratings IN to GND ..............................................................-0.3V to +18V Converter Output and V DD EN to GND .................................................-0.3V to (V + 0.3V) Short-Circuit Duration .......................................... Continuous IN LX to GND .............-0.3V to the lower of +18V and (V + 0.3V) Continuous Power Dissipation (T = +70C) IN A LX to GND (for 50ns) ....-1V to the lower of +18V and (V + 0.3V) 16-Bump WLP (derate 20.4mW/C above +70C) IN PGOOD to GND ......................................................-0.3V to +6V Multilayer Board ........................................................1500mW V to GND ............-0.3V to the lower of +6V and (V + 0.3V) Thermal Resistance ( ) (Note 2) ..............................23.6C/W DD IN JA COMP, FB, SS to Operating Temperature Range .......................... -40C to +85C GND ........................ -0.3V to the lower of +6V and (V + 0.3V) Junction Temperature (Note 3) .......................................+150C DD BST to LX ...............................................................-0.3V to +6V Continuous Operating Temperature BST to GND .........................................................-0.3V to +24V at Full Current (Note 3)................................................+105C BST to V ..........................................................-0.3V to +18V Storage Temperature Range ........................... -65C to +150C DD LX RMS Current (Note 1) ................................................0 to 9A Soldering Temperature (reflow) ...................................... +260C Note 1: LX has internal clamp diodes to GND and IN. Applications that forward bias these diodes should take care not to exceed the devices package power dissipation. Note 2: Package thermal resistances were obtained based on the MAX18066/MAX18166 evaluation kit. Note 3: Continuous operation at full current beyond +105C can degrade product life. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Information PACKAGE TYPE: 16 WLP Package Code W162B2+1 Outline Number 21-0200 Land Pattern Number Refer to Application Note 1891 For the latest package outline information and land patterns, go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Maxim Integrated 2 www.maximintegrated.com