5V, Dual 4A/Dual-Phase 8A Step-Down DC/DC Regulator in 2.2mm × 2.7mm WLCSP

The LTC3314A features dual monolithic synchronous 4A step-down converters in a 2.2mm × 2.7mm package for space saving applications with demanding performance requirements. Using a constant frequency, peak current mode architecture at switching frequencies up to 3MHz, both bucks achieve high efficiency and fast transient response with small external components. The LTC3314A can also be configured as a single output, 2-phase 8A step-down converter.

The LTC3314A operates in forced continuous or pulse-skipping mode for low noise, or in Burst Mode operation for high efficiency at light loads. The common switching frequency is set to a default 2MHz, programmed with an external resistor, or synchronized to an external oscillator via the MODE/SYNC pin. To reduce input ripple current, the dual converters switch 180 degrees out of phase.

With an input range of 2.25V to 5.5V the LTC3314A regulates to outputs as low as 500mV. Other features include precision enable thresholds, PGOOD signals, output overvoltage protection, thermal shutdown, and output short-circuit protection. The device is available in a 30-lead, 2.2mm × 2.7mm WLCSP package.

APPLICATIONS

* Servers, Telecom Power Supplies, Optical Networking

* Distributed DC Power Systems (POL)

* FPGA, ASIC, μP Core Supplies

* Industrial/Automotive/Communications

* Dual 4A Outputs

* Configurable as Single Output, 2-Phase 8A Buck

* High Efficiency: 12mΩ High-Side and 8mΩ Low-Side

* ±1% Maximum Total DC Output Error

* Wide Bandwidth, Fast Transient Response

* VIN Range: 2.25V to 5.5V

* VOUT Range: 0.5V to VIN