The LTC3720 is a synchronous step-down switching regulator controller for CPU power. It supports programmable output voltage between 1.05V and 1.825V, does not require a sense resistor, and has features such as wide input voltage range, adjustable current limit, and switching frequency.
The LTC3720 is a synchronous step‑down switching regulator controller designed for CPU power supplies. It offers a programmable 5‑bit output voltage from 1.05 V to 1.825 V, a wide input range of 4 V to 36 V, and duty cycles from 2 % to 87 % at 200 kHz. Features include true current‑mode control, dual N‑channel MOSFET drive, and various protection functions such as over‑voltage and short‑circuit shutdown.
The document includes absolute maximum ratings, detailed electrical characteristics, typical performance graphs, pin descriptions, functional diagrams, package dimensions for the 28‑lead narrow SSOP, and a list of related Linear Technology parts.
| Output Voltage Range | 1.05 V to 1.825 V |
|---|---|
| Input Voltage Range | 4 V to 36 V |
| Duty Cycle | 2 % to 87 % at 200 kHz |
| Package Type | 28‑Lead Narrow Plastic SSOP |
| Maximum Current Sense Threshold | Vang = 1 V, Vg = 0.76 V |
The LTC3720 can be programmed to output voltages from 1.05 V to 1.825 V.
The device operates with an input supply voltage between 4 V and 36 V.
It provides a duty cycle from 2 % up to 87 % at a switching frequency of 200 kHz.
The LTC3720 is available in a 28‑lead narrow plastic SSOP package.