The MAX8516/MAX8517/MAX8518 is a low-dropout linear regulator that operates from input voltages as low as 1.425V and is able to deliver up to 1A of continuous output current with a maximum dropout voltage of only 200mV. The output voltage can be set from 0.5V to (VIN - 0.2V) and is 1.4% accurate over load and line variations, from 0°C to +85°C. These regulators use small, 1µF ceramic input capacitors and 4.7µF ceramic output capacitors to deliver 1A output current. High bandwidth provides excellent transient response and limits the output voltage deviation to 45mV for a 20mA to 1A load step, with only a 4.7µF ceramic output capacitor, and the voltage deviations can be reduced further by increasing the output capacitor. Designed with an internal p-channel MOSFET pass transistor, the MAX8516/MAX8517/MAX8518 feature low 340µA (typ) supply current during dropout conditions. Soft-start reduces inrush current. Other features include a logic-controlled shutdown mode, short-circuit protection, and thermal-overload protection. The MAX8517 features a power-OK (POK) output that transitions high when the regulator output is within ±10% of its nominal output voltage. The MAX8518 features a 150ms power-on reset output. The parts are packaged in a 10-pin µMAX® package that includes an exposed pad for optimal power dissipation.
The MAX8516, MAX8517, and MAX8518 are low‑dropout linear regulators that operate from 1.425 V to 3.6 V input and can deliver up to 1 A continuous output current. They feature a typical dropout of 200 mV, adjustable output from 0.5 V to (VIN‑0.2 V), and low quiescent current (340 µA typ). Additional functions include soft‑start, logic‑controlled shutdown, short‑circuit and thermal‑overload protection, and optional Power‑OK (MAX8517) or Power‑On‑Reset (MAX8518) outputs.
The devices are packaged in a 10‑pin uMAX package with an exposed thermal pad for efficient heat removal. Pin descriptions, absolute maximum ratings, and detailed electrical characteristics are provided, along with guidelines for capacitor selection, transient response, and layout to ensure stable operation across the –40 °C to +85 °C temperature range.
| Input Voltage Range | 1.425 V to 3.6 V |
|---|---|
| Output Voltage Range | 0.5 V to 3.4 V |
| Maximum Output Current | 1 A continuous |
| Typical Dropout Voltage | 200 mV |
| Quiescent Current (typical) | 340 µA |
| Shutdown Supply Current (typical) | <25 µA |
| Package | 10‑pin uMAX |
| Power‑OK (POK) Output | Available on MAX8517 |
| Power‑On‑Reset (POR) Output | Available on MAX8518 |
The regulators accept an input voltage from 1.425 V to 3.6 V.
They can provide up to 1 A of continuous output current.
Typical dropout voltage is 200 mV at full load.
Yes, the MAX8517 includes a Power‑OK (POK) output that goes high when the output is within ±10 % of its nominal voltage.