The AMS1503 is a monolithic 3A low dropout voltage regulator with adjustable or fixed output, high current output, low dropout voltage, and fast transient response. It is designed to power the new generation of microprocessors.
The AMS1503 series of adjustable and fixed low dropout voltage regulators are designed to provide 3A output current to power the new generation of microprocessors. The dropout voltage of the device is 100mV at light loads and rising to 500mV at maximum output current. A second low current input voltage 1V or greater then the output voltage is required to achieve this dropout.
New features have been added to the AMS1503: a remote Sense pin is brought out virtually eliminating output voltage variations due to load changes. The typical load regulation, measured at the Sense pin, for a load current step of 100mA to 3A is less than 1mV. The AMS1503 series has fast transient response. The Adjust pin is brought out on fixed devices. To further improve the transient response the addition of a small capacitor on the Adjust pin is recommended.
| Output Current | 3A |
|---|---|
| Dropout Voltage | 500mV at 3A Output Current |
| Package Types | 5 lead TO-220, TO-263 (plastic DD), 7 lead TO-220 |
| Thermal Resistance (TO-220) | 50°C/W |
| Thermal Resistance (TO-263) | 30°C/W |
The available output voltages are 1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 3.5V and 5.0V.
A second low current input voltage 1V or greater than the output voltage is required to achieve the specified dropout.
The Sense pin allows for Kelvin sensing of the output voltage at the load to virtually eliminate output voltage variations due to load changes.