MAX748AEPA+

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The MAX748AEPA+ is a voltage regulator from Texas Instruments that is part of the PMIC – Voltage Regulators – DC DC Switching Regulators family. The regulator offers high efficiency and low quiescent current ideal for low power and low standby power applications. It is an ideal choice for powering MCUs and other low-power digital logic that runs on lower main supplies. The MAX748AEPA+ can be used in a wide range of applications, including battery powered systems, LCD panels and low output voltage power management circuits.

The MAX748AEPA+ has two main operations modes: PFM and PWM. The PFM (pulse frequency modulation) mode is used for low power applications to minimize quiescent current, while the PWM (pulse width modulation) mode is used for higher power applications for higher efficiency. The PWM mode offers up to 100% duty cycle and constant switching current up to 500mA with a switching frequency ranging from 200kHz to 1MHz. The MAX748AEPA+ also features an input current limit function which prevents the part from being over stressed or damaged by large inrush currents. This feature is very important in applications where the input voltage is transient and could easily overload the device.

The MAX748AEPA+ utilizes an on-board voltage reference and comparator to control the output voltage. The voltage reference is adjustable through a single external resistor and also provides a standard positive feedback loop to ensure accurate regulation of the output voltage. The magnitude of the voltage reference can be adjusted from 0.2V up to 1.6V for a wide range of output voltages. The adjustable threshold on the comparator is used to set the minimum PWM duty cycle, allowing precise control of the output voltage. The device also features an internal oscillator, which allows for precision frequency control over the PWM and PFM modes.

The MAX748AEPA+ provides a low-cost, simple to use solution for voltage regulation in a wide range of applications. It is an ideal choice for designs that require a low quiescent current and low standby power, while still offering higher power outputs. Its small size and ease of use make it a great fit for battery-powered systems, LCD panels and low output voltage power management circuits.

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