The document introduces the LTC3713 low input voltage, high power, No RSENSE synchronous buck DC/DC controller. The controller adopts true current mode control, the input voltage can be as low as 1.5V, without 5V auxiliary power supply, using standard 5V logic level N-channel MOSFETs, adjustable current limit, frequency, switch time, duty cycle, reference voltage, output overvoltage protection, etc., suitable for telecom card 3.3V, 2.5V, 1.8V step-down, bus termination (DDR memory, SSTL), synchronous buck with general purpose boost, low VIN synchronous boost and other applications.
The LTC3713 is a low‑input‑voltage, high‑power synchronous buck DC/DC controller designed for operation with input voltages as low as 0.9 V. It features true current‑mode control, no external sense resistor, and an adjustable frequency set by an external resistor. The device supports a wide duty‑cycle range and includes built‑in protection features such as short‑circuit shutdown and over‑voltage monitoring.
The datasheet details absolute maximum ratings, electrical characteristics, pin functions, typical performance curves, and package information. It also includes a typical application circuit for a 3.3 V to 5 V synchronous boost converter and a list of recommended external components.
| Shutdown Supply Current | 15 – 30 pA |
|---|---|
| BOOST Switch Current Limit | 500 – 800 mA |
| Package | 24‑Lead Plastic SSOP |
The shutdown supply current is specified as 15 pA to 30 pA.
Pin 1 (RUN/SS) is the Run Control and Soft‑Start Input.