MAX15112 – Current-Mode Synchronous Step-Down Regulator

Part Number: MAX15112

Function: Current-Mode Synchronous Step-Down Regulator

Manufacturer: Maxim Integrated Products


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MAX15112 image

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19-5966; Rev 1; 9/11 EVALUATION KIT AVAILABLE MAX15112 High-Efficiency, 12A, Current-Mode Synchronous Step-Down Regulator with Integrated Switches General Description The MAX15112 high-efficiency, current-mode step-down regulator with integrated power switches operates from 2.7V to 5.5V and delivers up to 12A of output current in a small 2mm x 3mm package. The MAX15112 offers excellent efficiency with skip mode capability at light-load conditions, yet provides unmatched efficiency under heavy load conditions. The combination of small size and high efficiency makes this device suitable for both portable and nonportable applications. The MAX15112 utilizes a current-mode control archi­ tecture with a high-gain transconductance error ampli­ fier, which allows a simple compensation scheme and enables a cycle-by-cycle current limit with fast response to line and load transients. A factory-trimmed switching frequency of 1MHz (PWM operation) allows for a compact, all-ceramic capacitor design. Integrated switches with low on-resistance ensure high efficiency at heavy loads while min­ imizing critical inductances. The MAX15112’s simple layout and footprint assure first-pass success in new designs. Other features of the MAX15112 include a capacitorprogrammable soft-start to reduce inrush current, safe startup into a prebiased output, an enable input, and a power-good output for power sequencing. The regulator is available in a 24-bump (4 x 6), 2.10mm x 3.05mm WLP package, and is fully specified over the -40NC to +85NC extended temperature range. S Continuous 12A Output Current S ±1% Feedback Accuracy Over Load, Line, and Temperature S Operates from 2.7V to 5.5V Supply S Input Undervoltage Lockout S Adjustable Output Range from 0.6V Up to 0.94 x VIN S Programmable Soft-Start S Factory-Trimmed 1MHz Switching Frequency S Stable with Low-ESR Ceramic Output Capacitors S Safe-Startup into a Prebiased Output S External Reference Input S Selectable Skip Mode Option for Improved Efficiency at Light Loads S Enable Input/PGOOD Output Allows Sequencing S Remote Ground Sense for Improved Accuracy S Thermal and Overcurrent Protection S Tiny 2.10mm x 3.05mm, 24-Bump WLP Package Features Applications Notebooks Servers Distributed Power Systems DDR Memory Base Stations Ordering Information appears at end of data sheet. Typical Operating Circuits ON OFF EN SKIP AIN VIN = 2.7V TO 5.5V IN CIN PGOOD PGOOD SS/REFIN CSS PWM MODE OPERATION GND COMP CCC RC CC R2 RPULL FB LX BST CBST LOUT COUT GSNS R1 VOUT MAX15112 Typical Operating Circuits continued at end of data sheet. For related parts and recommended products to use with this part, refer to: Maxim Integrated Products   1 For pricing, delivery, and ordering informati […]

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MAX15112 Datasheet

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