LDLN050 Datasheet 500 mA, high performance low dropout linear regulator Features Input voltage range: 2.7 V to 6.5 V Very low output voltage noise: 13 V /V RMS OUT Low quiescent current: 48 A typical DFN8 (3 x 3 mm) 500 mA guaranteed output current Fast start-up time: 50 s High PSRR: 65 dB at 100 Hz -40 C to 125 C ambient operative temperature range Very low dropout: 190 mV at max. I OUT Adjustable (from 1.25 V to 6 V) or fixed output voltage on request (from 1.0 V to 4.3 V) Stable with low ESR capacitor: min. 2 F Current limit and thermal protections DFN8 (3 x 3 mm) standard for industrial Application Low noise POL Wireless communication Industrial applications Maturity status link Description LDLN050 The LDLN050 is a 500 mA LDO regulator, designed to be used in several environments. The LDLN050 has a very low-resistance pass element (PMOS) that is even very fast during the turn-on. Thanks to its low-noise design, the LDLN050 can be used to supply noise sensitive circuits such as sensors, MCUs and wireless ICs in industrial applications. The LDO low current consumption (typically 48 A) is also used on battery-supplied applications. On the adjustable version, the output voltage can be set to any desired value between 1.25 V and 6 V. Fixed voltage versions, between 1.0 V and 4.3 V (with 0.1 V step) can be provided upon request. On the fixed voltage versions only, an external capacitor can be connected to C NR pin to further reduce the noise on the regulated output voltage. The LDLN050 is available in DFN8 (3 x 3 mm) package. DS12809 - Rev 4 - September 2021 www.st.com For further information contact your local STMicroelectronics sales office.LDLN050 Diagram 1 Diagram Figure 1. Block diagram, adjustable version V V IN OUT UVLO Current limit EN Thermal OPAMP Enable protection FB Bandgap reference GND Figure 2. Block diagram, fixed version V IN V OUT UVLO Current limit EN Thermal Enable OPAMP protection Bandgap Quick-start reference circuit GND NR DS12809 - Rev 4 page 2/22