LD3985M28R STMicroelectronics

LD3985 Ultra low drop and low noise BiCMOS voltage regulators Datasheet - production data Description The LD3985 provides up to 150 mA, from 2.5 V to 6 V input voltage. The ultra low drop voltage, low quiescent current and low noise make it suitable for low power applications and in battery-powered systems. Regulator ground current increases slightly in dropout only, prolonging the battery life. Power supply rejection is better than 60 dB at low frequencies and rolls off at 10 kHz. High power 627 / supply rejection is maintained down to low input voltage levels common to battery operated Features circuits. Shutdown logic control function is available, this means that when the device is Input voltage from 2.5 V to 6 V used as local regulator, it is possible to put a part Stable with low ESR ceramic capacitors of the board in standby, decreasing the total power consumption. The LD3985 is designed to Ultra low-dropout voltage (60 mV typ. at 150 work with low ESR ceramic capacitors. Typical mA load, 0.4 mV typ. at 1 mA load) applications are in mobile phones and similar Very low quiescent current (85 A typ. at no battery-powered wireless systems. load, 170 A typ. at 150 mA load max.1.5 A in OFF mode) Guaranteed output current up to 150 mA Wide range of output voltages: 1.22 V 1.8 V 2.5 V 2.7 V 2.8 V 2.9 V 3 V 3.3 V 4.7 V Fast turn-on time: typ. 200 s C = 1 F, O C = 10 nF and I = 1 mA BYP O Logic-controlled electronic shutdown Internal current and thermal limit Output low noise voltage 30 V over 10 Hz RMS to 100 kHz SVR of 60 dB at 1 kHz, 50 dB at 10 kHz Temperature range: - 40 C to 125 C November 2019 DocID9587 Rev 17 1/19 This is information on a product in full production. www.st.comContents LD3985 Contents 1 Diagram . 3 2 Pin configuration 4 3 Typical application 5 4 Maximum ratings 6 5 Electrical characteristics . 7 6 Typical performance characteristics 9 7 Package information 13 7.1 SOT23-5L package information 13 7.2 SOT23-5L packing information . 15 8 Ordering information . 17 9 Revision history . 18 2/19 DocID9587 Rev 17