XC6705B491GR-G

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

The XC6705B491GR-G is a high-speed low-dropout (LDO) voltage regulator manufactured by Torex Semiconductor. It provides a fixed output voltage of 4.9 V with a maximum output current of 200 mA. The device operates within an input voltage range of 3.5 V to 20.0 V and features a typical quiescent current of 1.2 µA, reducing to 0.15 µA in standby mode. It offers ±1.5% output voltage accuracy and a ripple rejection ratio of 50 dB at 1 kHz. The component utilizes a USP-4 package and includes built-in soft-start functionality.

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

• Integrates a P-channel driver FET and error amplifier for stable regulation using ceramic capacitors.
• Includes a soft-start function that suppresses inrush current and overshoot during startup.
• Features CE pin control to switch between active operation and ultra-low standby current consumption.

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

• Smart meters
• Gas detectors
• Smoke detectors
• Sensor/IoT devices

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

Verify the specific B-type designation confirms the absence of the CL discharge feature compared to A-type variants. Ensure the ordering suffix GR-G matches the required USP-4 package configuration. Confirm compliance requirements against the manufacturer's environmental declarations prior to final procurement.

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

Select this model when a fixed 4.9 V output is required from a supply ranging up to 20 V. The B-type variant is suitable for applications where automatic capacitor discharge is unnecessary. Verify that the load current does not exceed 200 mA and that the dropout voltage characteristics align with the minimum input voltage constraints.

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

This component belongs to the XC6705 series of high-speed LDO regulators designed for low power consumption. The series supports various fixed output voltages from 2.5 V to 5.5 V in 0.1 V increments. The B-type specifically lacks the internal CL discharge circuit found in the A-type, offering a simplified architecture for standard regulation tasks.

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

XC6705B481GR-G

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

Does the XC6705B491GR-G include a built-in CL discharge function?

No, the B-type designation indicates the absence of the CL discharge function, which is only present in the A-type variants of the XC6705 series.

What is the purpose of the CE pin on this regulator?

The CE pin serves as an ON/OFF control input. Applying a high voltage activates the regulator, while a low voltage switches it to standby mode, minimizing current consumption.