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LDS3985M18R| Datasheet

By datasheet - April 3rd, 2008

LDS3985M18R, LDS3985M25R, LDS3985M30R, LDS3985M33R, LDS3985PM15R, LDS3985PM28R, LDS3985PM33R, LDS3985PU15R, LDS3985PU28R, LDS3985PU33R, LDS3985XX15, LDS3985XX18, LDS3985XX25, LDS3985XX28, LDS3985XX30, LDS3985XX32, LDS3985XX33

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LDS3985xx
Ultra low drop-low noise BiCMOS 300 mA volt. reg. for use with very low ESR output capacitor
Features

Input voltage from 2.5 V to 6 V Stable with low ESR ceramic capacitors Ultra low dropout voltage (150 mV typ. at 300 mA load, 0.4 mV typ. at 1 mA load) Very low quiescent current (85uA typ. at no load, 200 uA typ. at 300 mA load; max 1.5 uA in OFF mode) Guaranteed output current up to 300 mA Wide range of output voltage: from 1.25 V to 5.0 V Fast turn-on time: typ. 240 us [CO = 2.2 uF, CBYP = 33 nF and IO = 1 mA] Logic-controlled electronic shutdown Internal current and thermal limit Output low noise voltage 30 uVRMS over 10 Hz to 100 kHz S.V.R. of 55 dB at 1 kHz, 50 dB at 10 kHz Temperature range: -40 C to 125 C It is stable with ceramic and high quality tantalum capacitor. The ultra low drop-voltage, low quiescent current and low noise makes it suitable for low power applications and in battery powered systems. Regulator ground current increases only slightly in dropout, further prolonging the battery life. Shutdown Logic Control function is available, this means that when the device is used as local regul
ator, it is possible to put a part of the board in standby, decreasing the total power consumption. Typical applications are in mobile phone and similar battery powered wireless systems, portable information appliances.
DFN6 SOT23-5L TSOT23-5L

Description
The LDS3985 provides up to 300 mA, from 2.5 V to 6 V input voltage.

Table 1.

Device summary
Part number LDS3985xx15 LDS3985xx18 LDS3985xx25 LDS3985xx28 LDS3985xx30 LDS3985xx33 Output voltage 1.5 V 1.8 V 2.5 V 2.8 V 3.0 V 3.3 V

September 2007

Rev. 4

1/21
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