LD57100J110R

Overview

The LD57100J110R is a fixed-output ultra-low-dropout linear regulator from STMicroelectronics, providing a nominal output voltage of 1.10 V with a guaranteed maximum load current of 1 A. It utilizes an NMOS pass transistor biased by a dedicated VBIAS pin to achieve an ultra-low dropout voltage of 40 mV typ at full load. The device operates with an input voltage range extending from the output voltage up to 5.5 V, while the bias supply requires between 3.0 V and 5.5 V. Output voltage tolerance is specified at ±0.5% at 25 °C and ±1% across the -40 °C to 85 °C temperature range.

Feature Summary

• Ultra-low dropout performance enabled by a dedicated bias pin for the NMOS pass transistor gate
• Logic-controlled electronic shutdown function that reduces standby current consumption below 0.1 µA
• Integrated protection mechanisms including internal current limiting, thermal shutdown, and active output discharge

Applications

• Smartphones
• Cameras
• Low voltage, low noise post regulation

Procurement Notes

Verify the specific ordering code LD57100J110R against the manufacturer's official datasheet to confirm the 1.10 V fixed output voltage and JD marking code. Ensure the design accommodates the Flip Chip6 package dimensions and required external ceramic capacitors for stability. Confirm that the application environment remains within the specified operating junction temperature range of -40 °C to 85 °C.

Selection Notes

Select this component when designing battery-operated systems requiring high accuracy and minimal voltage drop under heavy loads. The dedicated bias pin allows operation even when the main input voltage is very close to the desired output level. Consider the small Flip Chip6 footprint for space-constrained layouts and utilize the enable pin for power management strategies requiring deep sleep modes.

Part Context

This device belongs to the LD57100 family of 1 A ultra-low-dropout regulators. The family includes adjustable versions and various fixed output voltages ranging from 0.4 V to 3.6 V. All variants share the same core architecture featuring an NMOS pass element and a dedicated bias supply pin, packaged in a compact Flip Chip6 format designed for maximizing board space efficiency in portable electronics.

Replacement Considerations

LD57100J100R (1.00 V), LD57100J105R (1.05 V), LD57100J120R (1.20 V). These parts share identical electrical characteristics and packaging but differ only in their fixed output voltage settings.