# Power-good indication

Canonical URL: https://eloragrid.ai/symbols/power-good-indication
Publisher: Elora Grid
Updated: 2026-10-27
Lookup label: PG
Drawing use: Schematic
Reference families: Manufacturer

A power-good signal reports whether the source's specified acceptable-supply conditions are satisfied.

## In plain English

### What does Power-good indication mean?

A power-good signal reports whether the source's specified acceptable-supply conditions are satisfied.

### A simple example

A downstream circuit can use this status when deciding whether to enable its operation.

### What the drawings help you do

Draw power-good as a status signal from its source or supervisor to the receiving controller. It is information about specified acceptable conditions, not the supply conductor itself. State the active level and timing requirements from the selected source so the receiving circuit interprets it correctly.

### Before using this reference

- Identify the device generating the indication.
- Show the active level and receiving input.
- Reference acceptable conditions and assertion/release timing.

### Does power-good measure how much power is available?

Not generally. It reports whether the generating device’s defined conditions are satisfied. It does not automatically report spare capacity, complete system readiness or a continuously measured power value.

### Terms

- Active level: The signal level representing the stated condition.
- Status signal: Information describing a condition rather than carrying the load’s operating power.

Concept diagram: Defined supply conditions → Power-good status function → Receiving control input
Original functional explanation. Arrows show information or energy roles; two-headed arrows identify two-way interfaces. This is not a pinout, certified standards graphic or complete circuit.

- [Supply supervision and reset](https://www.ti.com/product-category/power-management/supervisor-reset-ics/overview.html)


## What it represents

A power-good signal reports whether the source's specified acceptable-supply conditions are satisfied.
A downstream circuit can use this status when deciding whether to enable its operation.
Draw power-good as a status signal from its source or supervisor to the receiving controller. It is information about specified acceptable conditions, not the supply conductor itself. State the active level and timing requirements from the selected source so the receiving circuit interprets it correctly. This is original functional artwork, not a certified standard graphic or device pinout.

## How to read it

- Identify the device generating the indication.
- Show the active level and receiving input.
- Reference acceptable conditions and assertion/release timing.
- Power-good timing and thresholds come from the selected source or supervisor.

## Information to show or reference

- Identify the device generating the indication.
- Show the active level and receiving input.
- Reference acceptable conditions and assertion/release timing.

## Important distinction

Power-good timing and thresholds come from the selected source or supervisor.

## Facts

- Representation type: Original functional block; not a certified IEC or IEEE graphic
- Concept input: Defined supply conditions
- Concept output: Receiving control input

## Public references

- [Supply supervision and reset](https://www.ti.com/product-category/power-management/supervisor-reset-ics/overview.html) — Texas Instruments. Supply supervision and reset: public technical context for the named function. Product and compliance details remain with the publisher.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.