LTC3728 is a high-efficiency dual 5V/3.3V step-down converter with ±1% output voltage accuracy.
The LTC3728 is a dual high‑performance step‑down switching regulator controller that drives N‑channel synchronous MOSFETs. It offers dual, 180° phased controllers, +1% output voltage accuracy, power‑good indicator, and a wide input range of 3.5 V to 36 V. The device supports three operating modes – constant‑frequency, burst‑mode, and PWM – with a phase‑lockable frequency up to 550 kHz.
Typical applications include battery‑operated digital devices, portable instruments, and telecom systems. The datasheet provides electrical characteristics, absolute maximum ratings, package options, and performance graphs to aid designers in implementing the regulator in multi‑output and poly‑phase configurations.
| Input Supply Voltage Range | 3.5 V to 36 V |
|---|---|
| Output Voltage Accuracy | ±1 % |
| Shutdown Current (Ig) | 20 µA |
| Package Options | 32‑lead QFN (5 mm × 5 mm) and 28‑lead SSOP |
The LTC3728 operates from 3.5 V up to 36 V.
Yes, it includes a power‑good output voltage indicator.
It is offered in a 32‑lead QFN (5 mm × 5 mm) and a 28‑lead SSOP package.