The RT9187A-27PB is a high-performance, low-dropout (LDO) voltage regulator manufactured by Richtek USA Inc. It is designed to provide a stable and accurate output voltage even with variations in input voltage and load current. This regulator is particularly suitable for applications requiring efficient power management and a compact footprint.

Applications

• Portable electronics: Smartphones, tablets, and other mobile devices where efficient power management is crucial for battery life.
• Wireless communication devices: Bluetooth modules, Wi-Fi transceivers, and other RF components requiring a stable voltage supply.
• Microcontroller-based systems: Providing a regulated voltage for microcontrollers and other digital logic circuits.
• Battery-powered equipment: Ensuring a stable voltage supply for sensors, actuators, and other components in battery-powered applications.
• Consumer electronics: MP3 players, digital cameras, and other devices requiring a regulated power supply.

Features

• Low dropout voltage: Ensures stable output voltage even with a small difference between input and output voltage.
• High output accuracy: Provides a precise and stable output voltage, typically within a few percent of the nominal value.
• Low quiescent current: Minimizes power consumption when the regulator is in standby mode, extending battery life.
• Over-current protection: Protects the regulator and the connected load from damage due to excessive current draw.
• Short-circuit protection: Prevents damage to the regulator in the event of a short circuit at the output.
• Thermal shutdown protection: Protects the regulator from overheating by automatically shutting down the output when the junction temperature exceeds a safe limit.
• Enable/disable control: Allows the regulator to be turned on and off via an external signal, further reducing power consumption.
• Compact package: Typically available in small surface-mount packages, suitable for space-constrained applications.

Benefits

• Extended battery life: The low quiescent current and high efficiency of the RT9187A-27PB help to extend battery life in portable applications.
• Stable and accurate voltage supply: Ensures reliable operation of connected components by providing a stable and accurate output voltage.
• Protection against damage: Over-current, short-circuit, and thermal shutdown protection features protect the regulator and the connected load from damage.
• Reduced power consumption: The enable/disable control feature allows the regulator to be turned off when not needed, further reducing power consumption.
• Simplified design: The integrated protection features and compact package simplify the design and layout of power supply circuits.

Additional Details

The RT9187A-27PB typically operates with an input voltage range of 2.5V to 5.5V and provides a fixed output voltage of 2.7V. The output current capability is typically in the range of 300mA to 500mA, depending on the specific model. The regulator is available in a small surface-mount package such as SOT-23 or DFN, making it suitable for high-density circuit board layouts. Refer to the specific datasheet for detailed electrical characteristics and application information.