LTC2926 is a MOSFET-controlled power supply tracker that allows tracking and sequencing of up to three power supply rails. It features adjustable ramp rates, offsets, and time delays, and automatic remote sense switching to compensate for voltage drops across the MOSFETs. The product is suitable for VCORE and VI/O supply tracking, microprocessor, DSP and FPGA supplies, servers, communication systems, etc.
The LTC2926 provides a simple solution for tracking and sequencing up to three power‑supply rails. It uses N‑channel MOSFETs and optional external switches to ramp voltages together, with adjustable offsets, delays, and ramp rates. Integrated remote‑sense switching compensates for voltage drops across the MOSFETs, and the device includes status and fault pins for monitoring.
The datasheet details absolute‑maximum ratings, electrical characteristics, pin functions, package dimensions, and typical application circuits. Pin descriptions cover the FAULT, ON, MGATE, SGATE, RSGATE, STATUS/PGI, TRACK, and other pins, explaining their behavior during normal operation and fault conditions.
| Supply Voltage Range | 2.9 V – 5.5 V |
|---|---|
| ON Pin Threshold Voltage (Rising) | 1.20 V – 1.26 V |
The FAULT pin is a negative‑logic fault input/output that latches a fault when its voltage falls below 0.5 V and resets when the ON pin voltage is low.
Remote sense switches are provided on pins D1/D2 (or S1/S2) and are controlled by the RSGATE pin, allowing compensation for voltage drops across external MOSFETs.
STATUS/PGI is a status output/power‑good input that goes high when all supplies are fully enhanced and low when a fault or power‑good timeout occurs.