TPS77901DGKR

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TPS77901DGKR is a low-dropout linear regulator (LDO) with multiple output voltage options, programmable output current limit, and other features for improved accuracy and power efficiency. It provides a stable 1.8 V ±2% output voltage and up to 1 A output current from 1.3 to 6 V inputs. Its high power efficiency allows battery-powered applications to operate with little waste heat, which makes it a popular choice for portable consumer electronics.

TPS77901DGKR consists of an error amplifier, a PMOS pass transistor, a current sense amplifier, a low dropout whose output voltage can be adjusted by an external voltage divider, an enable pin, and several protection circuits and monitoring functions including under-voltage lockout (UVLO) and over temperature protection (OTP).

The chip operates with a DC voltage input. When power is applied, the error amplifier monitors the output voltage and the reference voltage and regulates the pass transistor\'s gate current to keep the output voltage regulated. The TPS77901DGKR has internal soft start circuit that gradually increases the output voltage when the device is turned on. The soft start circuit reduces inrush current and helps avoid current limit peaks that can occur when the device is first started.

TPS77901DGKR is a very efficient device. Due to its extremely low dropout voltage (as low as 50 mV at full load) and its wide input voltage range, it operates extremely efficiently even at light loads. This results in better battery life in applications requiring low quiescent current and minimal heat dissipation.

The TPS77901DGKR is ideal for powering small, low-power systems such as portable consumer electronics like mobile phones, digital cameras and MP3 players. Its low quiescent current, wide input voltage range and low dropout voltage make it excellent for low power industrial and automotive applications. In additon, its output current limiting and over-temperature protection make it a great choice for applications requiring fail-safe operation.

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