The document mainly introduces the LTC3832/LTC3832-1 series products. The series products are high power and high efficiency switching regulator controllers, which can be used for 3.3V-5V to 0.6V-3.xV step-down applications. The series products have ±1% output voltage regulation accuracy and can maintain stability under temperature, load current and input voltage changes. The efficiency is up to 95%. It can provide adjustable or fixed 2.5V output.
The LTC3832 and LTC3832-1 are high‑power synchronous step‑down (buck) controller ICs optimized for low‑voltage operation (3 V‑8 V input) and capable of delivering up to 10 A. They feature an internal PWM generator, precision reference, and a current‑limit sensing circuit that uses the top MOSFET, eliminating the need for an external sense resistor.
The document provides absolute maximum ratings, detailed electrical characteristics, typical performance graphs, pin‑by‑pin descriptions, package dimensions, and example circuits. It also lists related parts and recommended layout guidelines for optimal performance.
| Input Supply Voltage Range | 3 V to 8 V |
|---|---|
| Maximum Duty Cycle | >91 % (over temperature) |
| Shutdown Current | <10 µA |
| Output Voltage Regulation | +1 % over line, load and temperature |
| Efficiency | Over 95 % |
The controller operates with an input supply voltage from 3 V up to 8 V.
It senses output current through the drain‑source resistance of the upper N‑channel MOSFET, so no external current‑sense resistor is required.
In shutdown mode the supply current drops to less than 10 µA.
The device can achieve efficiency greater than 95 % in typical operation.