The TCR5SB19U is a low-dropout (LDO) regulator from Toshiba Semiconductor and Storage. It's designed to provide a stable output voltage even when the input voltage is close to the output voltage. This particular model is configured to output a fixed 1.9V. The TCR5SB series is known for its small size and low quiescent current, making it suitable for battery-powered and other portable applications.

Applications

• Smartphones and mobile devices: Powering core logic, memory, and other low-voltage components.
• Wearable devices: Providing regulated power to microcontrollers, sensors, and display drivers.
• IoT (Internet of Things) devices: Supplying power to low-power microcontrollers and communication modules.
• Battery-powered equipment: Maintaining a stable voltage supply for sensitive circuits as the battery discharges.
• Wireless communication modules: Regulating the voltage for transceivers and baseband processors.

Features

• Low Dropout Voltage: Operates with a minimal difference between input and output voltage for extended battery life.
• Fixed Output Voltage: Provides a stable 1.9V output without external resistors.
• Low Quiescent Current: Minimizes power consumption when the load is light or absent.
• Overcurrent Protection: Protects the regulator and downstream components from damage due to excessive current draw.
• Overheat Protection: Prevents the regulator from overheating and failing due to excessive power dissipation.
• Small Package: Available in a compact package for space-constrained applications.

Benefits

• Extended Battery Life: The low dropout voltage and low quiescent current contribute to maximizing battery runtime in portable devices.
• Stable Output Voltage: Provides a consistent supply voltage, ensuring reliable operation of connected components.
• Simplified Design: The fixed output voltage eliminates the need for external resistors, reducing board space and component count.
• Enhanced System Reliability: Overcurrent and overheat protection mechanisms prevent damage to the regulator and the overall system.
• Compact Footprint: The small package allows for integration into densely populated circuit boards.

Additional Details

The TCR5SB19U typically comes in a small surface-mount package, such as a DFN or SOT package. Input voltage range is usually between 2.0V and 5.5V. The output current capability is generally in the range of 100mA to 300mA. Refer to the Toshiba datasheet for complete specifications, including operating temperature range, thermal resistance, and detailed electrical characteristics.