LD2982BXX18 Datasheet, PDF (1/17 Pages) STMicroelectronics – Very low drop and low noise voltage regulator with inhibit function, low ESR capacitors compatible

LD2982BXX18
Very low drop and low noise voltage regulator with
inhibit function, low ESR capacitors compatible
Features
■ Very low dropout voltage (120 mV at 50 mA
and 7 mV at 1 mA load)
■ Very low quiescent current (375 mA typ. at
50 mA load and 75 mA at 1 mA)
■ Output current up to 50 mA
■ Logic controlled electronic shutdown
SOT23-5L
■ Output voltage of 1.8 V
) _{■ Internal current and thermal limit}
t(s ■ Available in ± 1 % tolerance
c _{(at 25 °C, A version)}
du _{■ Supply voltage rejection: 45 dB (typ)}
ro _{■ Only 1 µF for stability}
P _{■ Low output noise voltage 30 µVrms}
te _{■ Smallest package SOT23-5L}
ole ■ Temperature range: -40 °C to 125 °C
Obs ^Description
) ^{- The LD2982 is a 50 mA fixed output voltage}
t(s ^{regulator. The ultra low drop voltage and the low}
quiescent current make them particularly suitable
uc ^{for low noise, low power applications, and in}
d _{battery powered systems. In sleep mode}
ro ^{quiescent current is less than 1 µA when INHIBIT}
P pin is pulled low. Shutdown logic control function
te ^{is available on pin 3 (TTL compatible). This}
means that when the device is used as local
le _{regulator, it is possible to put a part of the board in}
so standby, decreasing the total power consumption.
Ob^{An external capacitor CBYP = 10 nF connected}
Typical application are in cellular phone,
palmtop/laptop computer, personal digital
assistant (PDA), personal stereo, camcorder and
camera.
between bypass pin and GND reduce the noise to
30 µVrms.
Table 1.
Device summary
Order code
LD2982BM18R
Output voltage
1.8 V
July 2009
Doc ID 8188 Rev 7
1/17
www.st.com
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