MAX5090AATE+

MAX5090AATE+ is a DC/DC switching regulator from Texas Instruments\' family of advanced power management ICs. It offers ease of use, high efficiency, and reliability, as well as excellent regulation over a wide range of load and line conditions. The regulator is designed to provide a regulated output voltage while dissipating as little power as possible, making it ideal for minimal-power applications. It provides 0.5A of load current, an adjustable output voltage range of 1.5V to 12.0V, up to 95% efficiency, and up to 4.5ms of start-up time.

Application Fields

The MAX5090AATE+ DC/DC switching regulator has many uses in various industries. It is commonly used for embedded systems in automotive, industrial, medical, and communications markets, as well as for point-of-load (POL) voltage regulators in datacom/telecom and portable devices such as notebook/netbook PCs, handhelds, and digital TVs/STBs. It is also used for functions such as post regulation, power bus management, low-voltage power management, and sequencing and sequencing operation in communication system applications. The regulator has also been proven in military applications for radiating and nonradiating environments, making it particularly suitable for space exploration and military applications.

Working Principle

The MAX5090AATE+ DC/DC switching regulator uses a fixed frequency, current mode control topology, to provide high efficiency, low noise, and fast transient response. The output voltage, as well as additional features such as soft-start, can be adjusted with external resistors. The device uses synchronous rectifier technology with internal parasitic diode emulation circuitry to improve efficiency. Product features include internal soft-start and external output voltage setting, programmable switching frequency, device enable, and high-headroom control voltage. The device can operate at its maximum output power rating in a wide range of input voltages, from 2.7V to 12.6V.

The regulator operates as a single-switch DC/DC buck converter. An external reference voltage is used to adjust the output voltage. The internal oscillator produces a pulsed signal to drive the internal switching FETs, resulting in the transfer of energy from the input voltage to the output voltage. The MAX5090AATE+ can be configured for forced continuous (FCM) mode, pulse skipping mode (PSM), discontinuous conduction mode (DCM), and burst mode (BM) depending on the application\'s needs. The switching frequency can be programmed with a resistor to reduce electromagnetic interference (EMI) in sensitive applications. The device also features integrated bootstrap diodes to expedite the start-up cycle.

Conclusion

The MAX5090AATE+ DC/DC switching regulator from Texas Instruments is a highly efficient, reliable device offering many features that are ideal for a variety of low-power applications. It is suitable for embedded systems, point-of-load applications, power management, and sequencing operations in communication systems. The device uses a fixed frequency, current mode control topology and synchronous rectification technology for maximum efficiency. It can be programmed for forced continuous, pulse skipping, discontinuous conduction, and burst modes, and the switching frequency can be adjusted to reduce EMI. Overall, the MAX5090AATE+ is an excellent choice for low-power voltages.