Dual-Output 6A, 3Mhz, 2.7V to 16V, Step-Down Switching Regulator

The MAX20812 is a dual-output, fully integrated, highly efficient, step-down DC-DC switching regulator. This device operates from 2.7V to 16V input supplies, and each output can be regulated from 0.5V to 5.8V. The IC delivers up to 6A of load current per output. The two outputs can be connected in parallel as a single-output, dual-phase regulator that supports up to 12A load current.

The switching frequency of this device can be configured from 500kHz to 3.0MHz and provides the capability of optimizing the design in terms of solution size and performance.

The MAX20812 utilizes fixed-frequency, current-mode control with internal compensation. The dual-switching regulators operate 180° out-of-phase. The MAX20812 features a selectable advanced modulation scheme (AMS) to provide improved dynamic load transient performance. The device also features selectable discontinuous current mode (DCM) operation to improve light load efficiency. Operation settings and configurable features can be selected by connecting pin-strap resistors from the PGM pins to ground.

The MAX20812 has an internal 1.8V LDO output to power the gate drives (VCC) and internal circuitry (AVDD). The device also has an optional LDO input pin (LDOIN), allowing connection from a 2.5V to 5.5V bias input supply for optimized efficiency.

The MAX20812 integrates multiple protections including positive and negative overcurrent protection, output overvoltage protection, and overtemperature protection to ensure a robust design.

The MAX20812 is available in a compact 3.5mm x 4.6mm FC2QFN package that supports -40°C to +125°C junction temperature operation.

Applications

* Communications Equipment * I/O Pins of an FPGA/DSP/MCU * Memory VDDQ * Networking Equipment * Point-of-Load Voltage Regulators * Servers and Storage Equipment * μP Chipsets

* High Power Density with Low Component Count

* Dual-Output or Dual-Phase Operation* Single-Supply Operation with Integrated LDO for Bias Generation* Optional 2.5V to 5.5V External Bias for Higher Efficiency* Compact 3.5mm x 4.6mm, 21-Pin, FC2QFN Package* Internal Compensation

* Wide Operating Range

* 2.7V to 16V Input Voltage Range* 0.5V to 5.8V Output Voltage Range* 500kHz to 3MHz Configurable Switching Frequency* -40°C to +125°C Junction Temperature Range* Three Pin-Strap Programming Pins to Select Different Configurations* Independent Enable and Power Good for Each Output

* Optimized Performance and Efficiency

* 92.5% Peak Efficiency with VDDH = 12V, VOUT = 1.8V, and fSW = 1MHz* Interleaved 180° Out-of-Phase Operation* Selectable AMS to Improve Load Transient* Selectable DCM to Improve Light Load Efficiency* Active Current Balancing for Dual-Phase Operation