This datasheet provides detailed information on the MIC5219 500mA-Peak Output LDO Regulator, including its high peak output current capability, very low dropout voltage, better than 1% output voltage accuracy, 10mV typical dropout at light loads, less than 500mV maximum dropout at full load, 500mA peak output rating, continuous output current limited only by package and layout, CMOS or TTL compatible signal to enable or shut down the MIC5219, power consumption drops to nearly zero when disabled, minimized dropout ground current to help prolong battery life, reverse battery protection, current limiting, overtemperature shutdown, and low noise performance with an ultra-low-noise option.
The MIC5219 is an efficient LDO voltage regulator offering a 500 mA peak output current, ultra‑low dropout (as low as 10 mV at light load, ≤500 mV at full load), and better than ±1 % output voltage accuracy. It includes CMOS/TTL‑compatible enable‑shutdown control, reversed‑battery protection, current limiting, over‑temperature shutdown, and an optional ultra‑low‑noise mode.
Typical applications include notebook and handheld computers, cellular phones, battery‑powered equipment, and other compact electronic systems where a high‑current start‑up pulse is required. The device is available in fixed‑voltage and adjustable versions in SOT‑23‑5, MLF, and MSOP‑8 packages, with operating temperature ranges from –40 °C to +125 °C.
| Peak Output Current | 500 mA |
|---|---|
| Maximum Dropout Voltage (full load) | 500 mV |
| Output Voltage Accuracy | ±1 % (typical) |
| Enable/Shutdown Control | CMOS/TTL compatible EN pin |
| Operating Temperature Range | –40 °C to +125 °C |
The regulator’s dropout voltage is up to 500 mV at full load.
It is enabled by applying a high logic level to the EN pin and disabled by a low level or leaving the pin open.
The output voltage typically stays within ±1 % of the nominal value.
It operates from –40 °C up to +125 °C.