NCP4671DMX09TCG

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

The NCP4671DMX09TCG is a dual-rail ultra-low dropout linear regulator with a fixed 0.9 V output and 400 mA maximum current capability. It utilizes a separate bias supply (VBIAS) to achieve an input voltage range of 0.9 V to VBIAS, enabling operation from very low voltages. The device features ±15 mV accuracy at 25°C, 80 dB PSRR at 1 kHz, and a typical dropout voltage of 180 mV at full load. It is housed in a compact XDFN6 package.

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

• Dual rail architecture separates control circuitry power from the main power path for ultra-low dropout performance
• Integrated auto-discharge transistor enables rapid output capacitor discharge when disabled
• High power supply rejection ratio ensures stable regulation against input ripple
• Fixed high-accuracy output voltage minimizes external component requirements

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

• Battery powered equipment
• Portable communication equipments
• Cameras, VCRs and camcorders

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

Verify that the ordering suffix 'TCG' corresponds to the XDFN6 package and tape-and-reel shipping format as specified in the manufacturer's documentation. Confirm the 'D' variant designation indicates the inclusion of the internal output discharger feature. Ensure the specific 0.9 V output version matches the required system voltage rails before procurement.

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

Select this component when a fixed 0.9 V rail is required with minimal voltage drop from a slightly higher source. The dual-rail design necessitates a secondary bias voltage source, typically derived from a preceding DC/DC converter stage. Verify that the available bias voltage meets the minimum requirement relative to the 0.9 V output for optimal transient response and stability.

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

This part belongs to the NCP4671 family of dual-supply linear regulators designed for low-voltage applications. The series offers various fixed output voltages ranging from 0.6 V to 1.5 V in 0.1 V steps. The DMX09TCG specifically denotes the 0.9 V output variant packaged in the small XDFN6 form factor, suitable for space-constrained portable designs.

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

NCP4671DMX06TCG

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

How does the dual-rail architecture affect input voltage requirements?

The device requires two inputs: VIN for the power path and VBIAS for the control circuitry. VBIAS must be higher than VIN to enable ultra-low dropout operation, allowing the regulator to function even when VIN is close to the output voltage.

What is the function of the internal transistor in the D version?

The D version includes an internal transistor between VOUT and GND that activates during disable mode to rapidly discharge the output capacitor, ensuring faster system shutdown or state transition.