The AMS3102 series consists of positive fixed and adjustable voltage regulators ideally suited for use in battery-powered systems. These devices feature very low quiescent current of 0.3mA or less when supplying 10mA loads. This unique characteristic and the extremely low input-output differential required for proper regulation (0.25V for output currents of 100mA) make the AMS3102 ideal to use for standby power systems. Internal circuitry of AMS3102 is protected from input fault conditions caused by reverse battery installation or input voltages that exceed maximum rated input voltage. During line transients, such as load dump (40V) when the input voltage to the regulator can momentarily exceed the specified
The AMS3102 series provides positive fixed and adjustable low‑dropout voltage regulators designed for battery‑powered systems such as cellular phones, portable computers, and radio‑control devices. It delivers output currents over 300 mA, features a quiescent current as low as 0.3 mA, and includes reverse battery, overload, and over‑voltage protections. The device operates with an input‑output differential of less than 0.6 V and a dropout voltage as low as 0.25 V at 100 mA.
The regulator is available in several TO‑92, SOT‑89, SOT‑23 and SOIC packages, with ordering codes indicating fixed or adjustable output versions. Detailed electrical characteristics, pin‑out diagrams, and typical performance curves are provided, along with application notes on required output capacitors (minimum 2.2 µF, ESR ≤5 Ω) and design equations for adjustable versions.
| Maximum Output Current | 300 mA |
|---|---|
| Quiescent Current (10 mA load) | 0.3 mA |
| Dropout Voltage (100 mA) | 0.25 V |
| Input‑Output Differential | < 0.6 V |
| Reverse Battery Protection | Enabled |
| Overvoltage Protection | Enabled (24 V‑40 V) |
| Package Options | TO‑92, SOT‑89, 3‑lead SOT‑23, 5‑lead SOT‑23, 8‑lead SOIC |
An output capacitor of at least 2.2 µF with ESR ≤5 Ω and a resonant frequency above 500 kHz is required.
The quiescent current is about 0.3 mA when the load is 10 mA.
Yes, it has reverse battery protection.