XC6501B121NR-G

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

The XC6501B121NR-G is a high-speed, low-noise CMOS LDO regulator manufactured by Torex Semiconductor. It provides a fixed output voltage of 1.2V with a maximum output current of 200mA. The device operates within an input voltage range of 1.4V to 6.0V and features internal phase compensation, allowing for stable operation without an external load capacitor (CL). Key electrical parameters include a typical dropout voltage of 440mV at 100mA, a supply current of 13μA, and a ripple rejection ratio of 50dB at 1kHz. The part is housed in an SSOT-24 package and supports an operating ambient temperature range from -40°C to +85°C.

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

• Capacitor-less stability achieved through internal phase compensation circuitry.
• Integrated CL auto-discharge function via N-channel transistor for rapid output voltage reduction during shutdown.
• Fold-back current limit circuit providing short-circuit protection and output current limiting.

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

• Smart phones
• Portable games
• Wireless modules
• Bluetooth devices
• Digital-TV tuners

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

Verify the specific ordering suffix NR-G corresponds to the SSOT-24 package configuration. Confirm that the B-series designation aligns with requirements for CE High Active logic and the inclusion of the CL discharge feature. Ensure the 1.2V output tolerance meets system specifications before finalizing procurement orders.

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

Select this component when a fixed 1.2V rail is required with minimal external component count. The B-type series is suitable for designs needing active discharge of output capacitance upon shutdown. Verify that the input voltage remains above the minimum operating threshold of 1.4V under all load conditions.

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

This regulator belongs to the XC6501 series, which encompasses various output voltages and package options including SOT-25, USP-4, and WLP-4-01. The series is characterized by low power consumption and high-speed response. The XC6501B variant specifically distinguishes itself by incorporating the auto-discharge mechanism not present in the A-series counterparts.

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

XC6501A121NR-G: Identical electrical performance but lacks the CL auto-discharge function.

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

How does the XC6501B121NR-G achieve stability without an output capacitor?

Stability is maintained through internal phase compensation circuitry, eliminating the need for an external load capacitor (CL) typically required by other LDO regulators.

What is the function of the CL auto-discharge feature in the B-series?

When the CE pin is driven low, an internal N-channel transistor discharges the electric charge stored on any connected output capacitor, rapidly pulling the VOUT pin to the VSS level.