BU19UA3WNVX-TL

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The BU19UA3WNVX-TL is a single-output fixed low-dropout (LDO) voltage regulator manufactured by ROHM Semiconductor. It provides a fixed output voltage of 1.9 V with a maximum continuous output current of 300 mA. The device operates within an input voltage range of 1.7 V to 5.5 V and features a typical ripple rejection ratio of 70 dB. Key electrical parameters include a dropout voltage of 200 mV, line regulation of 2 mV, and load regulation of 25 mV. The quiescent circuit current is 50 µA, and the power dissipation capability is rated at 560 mW. Voltage regulation accuracy is specified at 1%. The component is housed in a DFN-4 surface-mount package and supports operation from -40°C to +85°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• CMOS-based linear regulation architecture designed for low power consumption applications
• Integrated protection mechanisms including over-current protection and thermal shutdown circuits
• High ripple rejection performance suitable for noise-sensitive signal processing environments

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Power supply stages for logic integrated circuits requiring stable low-voltage rails
• Biasing sources for radio frequency modules in communication devices
• Power management for camera module components in portable electronics

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix and tape-and-reel configuration against the official datasheet before ordering. Confirm that the DFN-4 footprint matches the target PCB layout dimensions precisely. Ensure compliance with RoHS directives if required by the end product specifications. Check for any updated design guidelines regarding external capacitor selection to maintain stability under varying load conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 1.9 V rail is required with moderate current demands up to 300 mA. Consider the 200 mV dropout voltage relative to the minimum available input voltage to ensure regulation integrity. Evaluate the 50 µA quiescent current impact on overall system battery life. Verify that the thermal dissipation requirements fit within the allowable junction temperature limits for the intended operating environment.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the BUxxUA3WNVX series of ultra-low noise LDO regulators from ROHM. These devices are characterized by their small DFN-4 package and high performance in terms of noise and transient response. They are engineered for use in portable consumer electronics where space constraints and power efficiency are critical design factors.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Consult the manufacturer's obsolescence notices as this part may be designated as Not Recommended for New Designs (NRND). Identify cross-reference parts within the same series offering different fixed output voltages if the 1.9 V specification is flexible.