LTC3315A Datasheet

• Dual Outputs Each with 2A Output Current
• High Efficiency: 19mΩ NMOS and 75mΩ PMOS
• Wide Bandwidth, Fast Transient Response
• Switching Frequency Synchronizable Up to 3MHz
• V_IN Range: 2.25V to 5.5V
• V_OUT Range: 0.5V to V_IN
• V_OUT Accuracy: ±1%
• Low Ripple Burst Mode^® Operation
• Peak Current Mode Control
• Minimum On-Time: 25ns
• Safely Tolerates Inductor Saturation in Overload
• Shutdown Current: 1.2µA
• Precision 400mV Enable Thresholds
• Internal Soft-Start and Compensation
• Power Good Output
• Low Profile, Thermally Enhanced 12-Lead 2mm × 2mm × 0.74mm LQFN and 16-Ball 1.64mm × 1.64mm × 0.5mm WLCSP Packages
• AEC-Q100 Qualified for Automotive Applications

• Servers, Telecom Supplies, Optical Networking
• Distributed DC Power Systems (POL)
• FPGA, ASIC, µP Core Supplies
• Industrial/Automotive/Communications

The LTC3315A features dual 2A monolithic synchronous step-down converters operating from a 2.25V to 5.5V input supply in one package for space-constrained applications with demanding performance requirements. Using constant frequency, peak current mode control at switching frequencies up to 3MHz with a minimum on-time as low as 25ns, both bucks achieve high efficiency and fast transient response in a very small application footprint.

The LTC3315A operates in forced continuous or pulse skip mode for low noise or in Burst Mode^® operation for high efficiency at light loads. The common buck switching frequency is 2MHz and can be synchronized to an external oscillator via the MODE/SYNC pin.

The LTC3315A can regulate outputs as low as 500mV. Other features include precision enable thresholds, a PGOOD signal, output overvoltage protection, thermal shutdown, output short-circuit protection, and up to 100% duty cycle operation for low dropout. The LTC3315A is available in a compact 2mm × 2mm LQFN package and a 1.64mm × 1.64mm WLCSP package.