ASP1211-A80DT

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Part Status:	Last Time Buy

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Introduction

ASP1211-A80DT is a special purpose, low dropout (LDO) voltage regulator designed for high speed digital applications. It is built with a low on-resistance MOSFET and has an adjustable voltage output range between 1.3 V and 3.3 V. It also features a wide input range up to 18 V and an output capability of up to 2 A. This device is ideal for a variety of scenarios in which high current and low noise are needed.

Application field

The main application fields for the ASP1211-A80DT are in high speed digital power supply designs, such as VDSL2 transceivers and server applications. Additionally, it is suitable for direct step down or flyback power supplies with low dropout regulators (LDO), PC/server VRM, and USB OTG/battery charging applications. Furthermore, it is also applicable to embedded control applications, as it provides precise control over output voltage and current.

Working Principle

The ASP1211-A80DT operates by using a principle called burst mode control, which allows it to switch at high frequency and with minimal on-resistance. The ASI1211 features two integrated comparators: one is connected to a DC voltage source, while the other receives the output signal. When the input signal is higher than the reference voltage, the comparator inputs switch states and the device is enabled (the enable pin can also be used to enable or disable the LDO manually). The internally maintained low-noise PWM signal then drives the on-resistance MOSFET, and the voltage drop across the resistor divider network sets the output voltage. This voltage is compared to the reference voltage and adjusted with the internal error amplifier. The ASP1211-A80DT is equipped with several other features, such as overcurrent protection and adjustable soft start/stop. Additionally, the LDO has a low ground current, making it ideal for battery-powered applications.

Conclusion

The ASP1211-A80DT is a high-speed, low-dropout voltage regulator designed for digital power supply designs and other high-current applications. With its robust design, wide input range and adjustable output voltage, the ASP1211-A80DT can provide precise control over output voltage and current. Additionally, it is equipped with several other features that make it ideal for both high-speed digital and low-power embedded control applications.

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