Product Summary

The LD3985M28R is an ultra low drop-low noise voltage regulator. It 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 only slightly in dropout, further prolonging the battery life. Power supply rejection is better than 60 dB at low frequencies and starts to roll off at 10 kHz. High power supply rejection is maintained down to low input voltage levels common to battery operated circuits. Shutdown logic control function is available, this means that when the device is used as local regulator, it is po ssible to put a part of the board in standby, decreasing the total power consumption. The LD3985xx is designed to work with low ESR ceramic capacitors. Typical applications are in mobile phone and similar battery powered wireless systems.

Parametrics

LD3985M28R absolute maximum ratings: (1)DC input voltage: -0.3 to 6V; (2)DC output voltage: -0.3 to VI+0.3V; (3)output current: internally limited; (4)storage temperature range: -65 to 150℃; (5)operating junction temperature range: -40 to 125℃.

Features

LD3985M28R features: (1)Input voltage from 2.5 V to 6 V; (2)Stable with low ESR ceramic capacitors; (3)Ultra low dropout voltage (100 mV typ. at 150mA load, 0.4 mV typ. at 1 mA load); (4)Very low quiescent current (85 μA typ. at no load, 170 μA typ. at 150 mA load; max 1.5 μA in OFF mode); (5)Guaranteed output current up to 150 mA; (6)Wide range of output voltage: 1.22 V; 1.8 V;2.5 V; 2.6 V; 2.7 V; 2.8 V; 2.9 V; 3 V; 3.3 V; 4.7 V; (7)Fast turn-on time: typ. 200 μs[CO =1μF, CBYP=10nF and IO=1mA]; (8)Logic-controlled electronic shutdown; (9)Internal current and thermal limit; (10)Output low noise voltage 30 μVRMS over 10 Hz to 100 kHz; (11)S.V.R. of 60 dB at 1 kHz, 50 dB at 10 kHz; (12)Temperature range: -40 °C to 125 °C.

Diagrams

LD3985M28R block diagram

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Negotiable