TPS51123ARGER

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The TPS51123A is a small, versatile synchronous boost voltage regulator with an adjustable output voltage. It provides an integrated MOSFET with high output current capability, making it ideal for buck-boost and boost applications. The TPS51123A can provide an output voltage ranging from 0.575V to 5.25V with a step size of 25mV from 0.6V to 5.25V. The internal synchronization circuit allows the switch frequency to be synchronized to another clock signal. When the Load Feed Forward (LFF) feature is enabled, the efficiency can increase significantly in light-load conditions.

The TPS51123A is deployed in a variety of electronics applications including smartphone and tablet chargers, laptops, and consumer electronics. It is capable of delivering up to 3A with a single Li-Ion cell, and up to 5A with two Li-Ion cells. The maximum output voltage can be adjusted using a resistor divider. The device also features overload protection, undervoltage protection, overvoltage protection, and short-circuit protection.

The TPS51123A works on the principle of Pulse Width Modulation (PWM). It is an integrated synchronous buck-boost or boost voltage regulator that operates in two modes: PWM or PFM. In PWM mode, the voltage regulator switches rapidly between on and off states according to an internally generated clock signal, while in PFM mode, the device enters a sleep state until it detects an input voltage or current transient. The device enters PWM mode to regulate the output voltage once a transient is detected.

The TPS51123A also features a Power Good (PG) output, which indicates whether the output voltage is within regulation limits. The enable pin allows the device to be disabled or enabled without affecting the output voltage. It also features soft-start and a low-ripple Burst Mode operation for low current consumption. The low quiescent current, combined with the low output ripple, makes the TPS51123A the ideal choice for mobile device power management.

In summary, the TPS51123A is a small, versatile synchronous boost voltage regulator that offers a wide input and output voltage range. It is ideal for portable and low-power applications due to its low quiescent current and high output current capability. The device offers a variety of protection features, including short-circuit and overload protection. The device is suitable for a variety of electronic devices, including smartphones and tablets, laptops, and consumer electronics.

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