TPS77618D

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The TPS77618D is a low-dropout (LDO) linear voltage regulator designed to provide a precise output voltage with a full-load output current up to 150 mA. This device operates from an input voltage range of 2.7 to 5.5 V and is capable of delivering a fixed and adjustable output voltage of 1.8, 2.5 and 3.3 V, allowing systems to be powered using a single power source. The TPS77618D is specifically designed to provide excellent load and line transient response and requires no external compensation for stability. It features an external enable for power-up control, as well as internal short-circuit current limit and thermal shutdown protection.

The TPS77618D is available in a 1.6 x 1.6 mm SOT-23 package, making it ideal for space-constrained applications. It offers a low dropout voltage of 340 mV and a high output accuracy of ±1.5%. With its low quiescent current of 19 µA and extremely low power consumption, the TPS77618D is an ideal solution for battery-powered applications, such as smartphones and portable medical devices.

1. Application Field of TPS77618D

The TPS77618D is suitable for a wide range of applications, such as mobile phones, portable media players and digital cameras, as well as consumer and industrial systems. The device is also suitable for automotive applications, such as engine control units, monitor and control modules and electronic steering wheel controls. It is designed to provide a precise output voltage with a full-load output current up to 150 mA while maintaining excellent line and load transient response. In addition, the device features a single enable pin for power-up control, as well as internal short-circuit current limit and thermal shutdown protection.

2. Working Principle of TPS77618D

The TPS77618D is a linear voltage regulator with an enable pin for powering up and down the system. At its core, the regulator functions by controlling the output voltage through an internal error amplifier, which monitors the output voltage and adjusts the current to the pass transistor. This adjustablenegative voltage feedback allows the device to maintain a constant output voltage. The input voltage is required to be higher than the output voltage by a minimum amount, typically referred to as the dropout voltage. When the system is in the off state, the enable pin can be used to disable the regulator and shut off the output.

The TPS77618D has a power-good (PGOOD) signal that is active when the regulator is enabled and the output voltage is within specification. In cases where the regulator is disabled, the PGOOD signal will be off to indicate that the output voltage is not available. The device also offers overload protection, which will shut down the regulator if the output current exceeds the maximum limit.

In addition, the device features a thermal shutdown protection that will shut down the output automatically when the junction temperature reaches a pre-determined temperature level. This will protect the device from damage caused by extended high temperature exposure during prolonged operation.

3. Summary

The TPS77618D is a low-dropout linear voltage regulator specifically designed for space-constrained applications. It features an external enable for power-up control and internal short-circuit current limit and thermal shutdown protection. This device operates from an input voltage range of 2.7 to 5.5 V and is capable of delivering a fixed and adjustable output voltage of 1.8, 2.5 and 3.3 V, allowing systems to be powered using a single power source. The TPS77618D is suitable for a wide range of applications, such as mobile phones, portable media players and digital cameras, as well as consumer and industrial systems. It offers a low dropout voltage of 340 mV and a high output accuracy of ±1.5%. With its low quiescent current of 19 µA and extremely low power consumption, the TPS77618D is an ideal solution for battery-powered applications.

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