The ADM6819/ADM6820 is a power supply sequencer chip from Analog Devices. It can realize the serial power supply of two supplies and has adjustable primary power supply monitoring function and programmable delay function. ADM6819/ADM6820 has a working temperature range of -40°C to +85°C, a package form of 6-lead SOT-23, and is pin-to-pin compatible with MAX6819/MAX6820.
The ADM6819 and ADM6820 are simple power‑supply sequencers with FET‑drive capability that monitor a primary voltage and enable or disable an external N‑channel MOSFET for a secondary supply. They support sequencing of two supplies (ADM6819) or a single‑supply version with adjustable delay (ADM6820) and can be cascaded for multi‑voltage systems.
Key features include an on‑board charge pump, adjustable primary‑supply monitor, fixed 300 ms delay for the ADM6819, capacitor‑adjustable delay for the ADM6820, and operation over a 2.95 V to 5.5 V supply range. The devices are supplied in a 6‑lead SOT‑23 package.
| Operating Voltage Range | 2.95 V to 5.5 V |
|---|---|
| Operating Temperature Range | -40 °C to +85 °C |
| Supply Current (typical) | 350 µA |
| Fixed Delay (ADM6819) | 300 ms |
| Package | 6‑lead SOT‑23 |
The ADM6819 uses a fixed 300 ms delay before the GATE output is driven high.
The device operates from –40 °C to +85 °C.
Both devices are supplied in a 6‑lead SOT‑23 surface‑mount package.