LDK220 Datasheet 200 mA low quiescent current and low noise LDO Features Input voltage from 2.5 to 13.2 V Very low-dropout voltage (100 mV typ. 100 mA load) Low quiescent current (typ. 55 A, 1 A in off mode) SOT23-5L SOT89 Low noise Output voltage tolerance: 2.0% 25 C 200 mA guaranteed output current Wide range of output voltages available on request: fixed from 1.2 V to 12 V with 100 mV step and adjustable Logic-controlled electronic shutdown SOT323-5L DFN6-1.2x1.3 Output discharge function Compatible with ceramic capacitor C = 1 F OUT Internal current and thermal limit Available in SOT23-5L, SOT323-5L, SOT-89 and DFN6-1.2x1.3 packages Temperature range: -40 C to 125 C Applications Battery-powered equipment TV Set-top box Maturity status link PC and laptop LDK220 Industrial Description The LDK220 is a low drop voltage regulator, which provides a maximum output current of 200 mA from an input voltage in the range of 2.5 V to 13.2 V, with a typical dropout voltage of 100 mV. A ceramic capacitor stabilizes it on the output. The very low drop voltage, low quiescent current and low noise make it suitable for battery-powered applications. The enable logic control function puts the LDK220 in shutdown mode allowing a total current consumption lower than 1 A. The device also includes a short-circuit constant current limiting and thermal protection. DS10219 - Rev 7 - November 2021 www.st.com For further information contact your local STMicroelectronics sales office.LDK220 Diagram 1 Diagram Figure 1. Block diagram (fixed version) V IN V OUT Bias generator OPAMP EN Enable Thermal protection Bandgap reference Current limit (*) GND Figure 2. Block diagram (adjustable version) V V OUT IN Bias generator OPAMP EN ADJ Enable Thermal protection Bandgap reference Current limit (*) GND (*) The device embeds autodischarge function (active when Enable in low). To avoid damages to the discharge function, we discourage to apply any external voltage to V pin when Enable pin is low. OUT DS10219 - Rev 7 page 2/32