BU19TD3WG-TR

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

The BU19TD3WG-TR is a standard CMOS low-dropout (LDO) voltage regulator manufactured by ROHM Semiconductor. It provides a fixed positive output voltage of 1.9 V with a maximum output current capability of 200 mA. The device operates within an input voltage range of 1.7 V to 6 V and features a typical power supply rejection ratio (PSRR) of 70 dB. Key electrical specifications include a maximum dropout voltage of 500 mV, line regulation of 2 mV, and load regulation of 10 mV. The quiescent operating supply current is 35 µA, and the maximum power dissipation is rated at 540 mW. It supports surface-mount installation in a 5-pin SSOP package and functions reliably across a temperature range of -40 °C to +85 °C.

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

• Standard CMOS architecture designed for efficient linear voltage regulation
• Fixed positive output configuration ensuring stable voltage delivery
• Low quiescent current operation suitable for power-sensitive applications

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

• Battery-powered portable electronic devices requiring stable 1.9 V rails
• Embedded systems utilizing standard CMOS logic families
• General-purpose linear voltage regulation in compact surface-mount designs

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

Verify the specific ordering suffix and package variant when sourcing, as manufacturers may offer different reel quantities or tape-and-reel configurations. Confirm that the received component matches the BU19TD3WG-TR designation exactly, including the manufacturer logo and date code markings. Ensure compatibility with your assembly process regarding the SSOP-5 footprint dimensions and soldering thermal profiles specified in the official datasheet.

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

Select this component when a fixed 1.9 V output is required with moderate current demands up to 200 mA. It is appropriate for designs prioritizing low static current consumption alongside standard noise rejection capabilities. Consider the 500 mV dropout voltage constraint to ensure sufficient headroom between input and output voltages under all load conditions. This regulator suits space-constrained applications due to its small SSOP-5 form factor.

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

This part belongs to ROHM's standard CMOS LDO voltage regulator series, which focuses on providing reliable linear regulation in compact packages. The BU19TD3WG-TR variant specifically targets the 1.9 V output niche within this family, offering a balance of performance and size for consumer electronics and industrial control modules where precise voltage levels are critical for downstream circuitry stability.

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

Direct substitutes within the same series include BU1CTD3WG-TR (1.25 V), BU26TD3WG-TR (2.6 V), and BU2JTD3WG-TR (2.85 V). These parts share identical pinouts and packaging but differ in fixed output voltage. Verify that the system design can accommodate the alternative voltage level before substitution.