Linear Technology's LTC3548EDD#TRPBF Dual Synchronous Step-Down DC/DC Converter

The LTC3548EDD#TRPBF is a high-performance, dual synchronous step-down DC/DC converter designed by Linear Technology (now part of Analog Devices), tailored for portable and compact electronics requiring efficient power management. This advanced power solution is housed in a small 10-lead DFN package with a 3mm x 3mm footprint, making it an ideal choice for space-constrained applications.

Each channel of the LTC3548EDD#TRPBF is capable of delivering up to 800mA of continuous output current with a wide input voltage range from 2.25V to 5.5V. This makes it suitable for single-cell Li-Ion, multi-cell alkaline, or NiMH applications, as well as for power supplies derived from a 5V bus. The device features a high switching frequency of up to 2.25MHz, which allows the use of tiny, low-cost capacitors and inductors, further reducing the overall solution size and cost.

The LTC3548EDD#TRPBF is designed with internal switches that boast a low RDS(ON) to enhance efficiency, which is crucial for maximizing battery life in portable devices. It also incorporates Burst Mode® operation, which reduces quiescent current to only 25µA per channel during light loads, thus preserving battery power. In addition, for noise-sensitive applications, the converter can be synchronized to an external clock or set to operate in constant-frequency PWM mode regardless of the load.

Additional features include independent shutdown and soft-start functions for each channel, over-temperature protection, and current-mode operation for excellent line and load transient response. The LTC3548EDD#TRPBF also provides independent power good outputs for each channel, enabling easy power sequencing and system monitoring.

With its robust feature set and compact size, the LTC3548EDD#TRPBF is an excellent choice for designers looking to implement a highly efficient power management system in portable devices such as handheld instruments, medical devices, and GPS units, as well as other battery-operated consumer electronics.

Linear Technology's commitment to high-quality and performance is evident in the LTC3548EDD#TRPBF, making it a reliable and efficient solution for today's demanding power supply requirements.