LDL1117 Datasheet 1.2 A high PSRR low-dropout linear voltage regulator Features Input voltage from 2.5 V to 18 V 20 V AMR Available on fixed output voltages: 1.2 V (1.185 V), 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V, 5.0 V (other options are available on request) Guaranteed output current 1.2 A SOT223 Typical dropout 350 mV 1.2 A Internal thermal, current and power limitation High PSRR 87 dB 120 Hz Operating temperature range: -40 C to 125C Package SOT223 Applications Consumer Industrial SMPS Motherboard P.O.L. DC-DC post-regulation Description Maturity status link The LDL1117 provides 1.2 A of maximum current with an input voltage range from 2.5 V to 18 V, and a typical dropout voltage of 350 mV 1.2 A. LDL1117 The high power supply rejection ratio of 87 dB at 120 Hz, rolling down to more than 40 dB at 100 kHz, makes the LDL1117 suitable for direct regulations in SMPS and secondary linear regulations in DC-DC converters. This device includes current limit, SOA and thermal protections. DS12022 - Rev 7 - January 2021 www.st.com For further information contact your local STMicroelectronics sales office.LDL1117 Diagram 1 Diagram Figure 1. Block diagram DS12022 - Rev 7 page 2/23