ASP1251-I12T

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ASP1251-I12T is a special purpose voltage regulator integrated circuit (IC) designed and manufactured by Lattice Semiconductor. The device is part of the Voltage Regulator family of products from the Advanced System Power (ASP) family of products from the company. This device is designed for demanding current and voltage regulation in applications specified for industrial or automotive electronic systems. ASP1251-I12T offers a wide input voltage range of 4.5V to 18V for use in both AC and DC power applications. The device also offers two independently adjustable output rail voltages with a maximum output current up to 12A. The circuit also supports a power-good indicator pin to provide an indication of the regulator’s system power status.

The circuit consists of an high-speed operational amplifier, coupled with an MOSFET power switch and an on-board controller. The device can switch up to 12A at 30mΩ with high efficiency. The device integrated controller generates the driver signals for the internal MOSFET power switch, as well as for the power good indicator pin. The internal logic also ensures proper sequencing of the two output rails during startup and shutdown. The device\'s under-voltage lockout and over temperature protection features on both outputs make it suitable for applications where high system reliability is required.

The output voltage levels of ASP1251-I12T can be set through external resistor dividers connected to the ADJ1 and ADJ2 pins. An external open-drain PGOOD pin monitors the output voltage drop to ensure the system meets the required specifications. It informs the system of the load current requirements and reports errors if the load is not within tolerance. The device is packaged in an 8-pin thermally enhanced DFN package. The operating temperature range of the circuit is −40°C to +125°C, making it suitable for a variety of applications. It is also compliant with RoHS directives and is AEC-Q100 qualified.

For a system to function at its best, the ASP1251-I12T is designed for high accuracy, low noise operation and wide set up capability. The circuit provides up to two fast-response and stable, adjustable output voltages with a selectable 2A current limit. The rugged 8-pin thermally enhanced DFN package provides thermal management with superior thermal performance for an improved power supply system and reliable operation. The high precision and robust design of the ASP1251-I12T makes it ideal for various applications such as load leveling, voltage scaling, and general power supply.

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