The SH3100 is a power management IC produced by semtech company. It can provide support functions for microprocessors, including clock source, pulse, reset, etc. It is suitable for low power applications.
The SH3100 supervisory IC provides a fast‑startup clock source and a range of programmable functions such as a master HFDCO oscillator (8 MHz‑33.5 MHz), a 32.768 kHz crystal oscillator, watchdog timer, real‑time clock and general‑purpose DAC/Comparator. It is designed for low‑power applications, consuming only a few microamps in standby and supporting battery backup operation.
The device is supplied in a 3 mm × 3 mm 16‑lead MLP package and operates from 1.7 V to 5.5 V on VDD, with a backup supply (VBAK) from 0.9 V to 5.5 V. It features two independent clock outputs, I²C communication, programmable reset thresholds, and a range of power‑management options including LDO and switching regulator control.
| Operating voltage (VDD) | 1.7 V to 5.5 V |
|---|---|
| Backup voltage (VBAK) | 0.9 V to 5.5 V |
| Maximum operating current | < 12 mA |
| Package | 3 mm × 3 mm 16‑lead MLP |
| Crystal oscillator frequency | 32.768 kHz |
| Watchdog timer resolution | 7.8 ms to 8 s |
| Real‑time clock resolution | 1/256 s up to year 2099 |
The main VDD supply works from 1.7 V to 5.5 V, while the backup VBAK supply operates from 0.9 V to 5.5 V.
Yes, it features a programmable watchdog counter with a 7.8 ms resolution up to an 8‑second delay.