8681l Ic Datasheet _best_ <RECENT | EDITION>

Quick summary

The part number string "8681L" is ambiguous. Two main families appear in datasheet searches:

• OZ8681 / OZ8681L (also listed as 8681L / 8681LN) — battery/SMBus charge-controller ICs used on laptop/mainboard power subsystems (commonly found in repair parts catalogs; QFN packages).
• Z8681 / Z86C81 / Z8681 — Zilog/SGS microcontroller variants from the Z8/Z86 family (older microcontrollers, multiple derivatives and application notes).

Below is a structured guide to help you identify which device you mean, find datasheets, and use the IC correctly.

Electrical Characteristics

• Input range: 2.6V to 5.5V (battery powered).
• Output voltage up to 24V (depending on LED string).
• Switching frequency (often ~1MHz) – affects external inductor/capacitor size.
• LED current accuracy and matching if multiple channels (some variants have 2-3 channels; check if 8681L is single or multi-channel).
• Efficiency curves (80–85% typical at moderate load).

6.1 Ignoring the "Minimum Load Current"

Some older regulator designs require a minimum load (e.g., 1 mA) to maintain regulation. If your load is intermittent, add a dummy resistor. Check the datasheet's "Minimum Load Current" spec. 8681l ic datasheet

4.1 Basic Fixed Voltage Regulator

This is the simplest use case—converting a higher voltage (e.g., 5V USB) to a lower, cleaner 3.3V.

Components needed:

• 8681L IC
• C1: 1 µF ceramic input capacitor
• C2: 1 µF ceramic output capacitor (low ESR)

Schematic notes:

• Tie EN to VIN if always enabled.
• Place C1 close to VIN and GND.
• Place C2 close to VOUT and GND.

Part 7: Comparing 8681L With Alternative ICs

When you review the 8681L datasheet, compare it with these common alternatives to see if it is the right fit. Quick summary The part number string "8681L" is ambiguous

| IC Part | Output Voltage | Max Current | Dropout | Quiescent Current | Package | Best For | |---------|----------------|-------------|---------|-------------------|---------|----------| | 8681L | 3.3V | 300 mA | 120 mV | 25 µA | SOT-23-5 | Battery, low noise | | LM1117-3.3 | 3.3V | 800 mA | 1.1V | 5 mA | SOT-223 | High current, legacy | | MCP1703-3.3 | 3.3V | 250 mA | 625 mV | 2 µA | SOT-23 | Ultra-low IQ | | XC6206P332 | 3.3V | 200 mA | 250 mV | 1 µA | SOT-23 | Cost-sensitive, low power | | RT9013-33 | 3.3V | 500 mA | 250 mV | 25 µA | SC-70 | Fast transient response |

Takeaway: The 8681L occupies a middle ground – better dropout than XC6206, lower IQ than LM1117, but not the absolute best in any single category. OZ8681 / OZ8681L (also listed as 8681L /

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