LTC1626CS

The LTC1626CS is a low voltage, high efficiency step-down DC/DC converter from Linear Technology (LT). It is designed for applications requiring efficient power conversion from sources like single-cell Li-Ion or 3- to 4-cell NiCd/NiMH batteries, with an input supply voltage range of 2.5V to 6V.

This converter utilizes current mode operation for excellent line and load transient response. It features automatic power saving Burst Mode operation, which reduces gate charge losses at low output currents. The device includes a built-in 0.32 W switch (at VIN = 4.5V) capable of delivering up to 0.6A of output current. At no load, the converter draws only 165mA, and in shutdown mode, it consumes a mere 0.5mA, making it suitable for power-sensitive applications.

The LTC1626CS operates with high efficiency, up to 95%. It supports low dropout operation with a 100% duty cycle, maximizing battery life. The inductor current is programmable via an external current sense resistor. The device is available in a 14-pin SO package, suitable for surface mounting.

Key features include a wide input supply voltage range, high efficiency, low RDS(ON) internal switch, current mode operation, short-circuit protection, low dropout operation, and a built-in low-battery detector.