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LD3986 Scheda tecnica(PDF) 1 Page - STMicroelectronics

Il numero della parte LD3986
Spiegazioni elettronici  DUAL ULTRA LOW DROP-LOW NOISE BICMOS VOLTAGE REG. FOR USE WITH VERY LOW ESR OUT. CAPACITORS
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LD3986 Scheda tecnica(HTML) 1 Page - STMicroelectronics

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September 2005
s
INPUT VOLTAGE FROM 2.5V TO 6V
s
STABLE WITH LOW ESR CERAMIC
CAPACITORS
s
ULTRA LOW DROPOUT VOLTAGE (60mV
TYP. AT 150mA LOAD, 0.4mV TYP. AT 1mA
LOAD)
s
VERY LOW QUIESCENT CURRENT (155µA
TYP. AT NO LOAD, 290µA TYP. AT 150mA
LOAD; MAX 2µA IN OFF MODE)
s
GUARANTEED OUTPUT CURRENT UP TO
150mA FOR BOTH OUTPUTS
s
DUAL OUTPUT VOLTAGES
s
FAST TURN-ON TIME: TYP. 120µs (CO=1µF,
CBYP=10nF AND IO=1mA)
s
LOGIC-CONTROLLED ELECTRONIC
SHUTDOWN
s
INTERNAL CURRENT AND THERMAL LIMIT
s
OUTPUT LOW NOISE VOLTAGE 30µVRMS
OVER 10Hz to 100KHz
s
S.V.R. OF 50dB AT 1KHz, 40dB AT 10KHz
s
TEMPERATURE RANGE: -40°C TO 125°C
DESCRIPTION
The LD3986 provides up to 150mA at each output,
from 2.5V to 6V 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 50 dB at 1KHz and 40 dB at 10KHz. High power
supply rejection is maintained down to low input
voltage levels
common
to battery operated
circuits. Shutdown Logic Control function is
available for each output, this means that when
the device is used as local regulator, it is possible
to put a part of the board in standby, decreasing
the total power consumption. The LD3986 is
designed
to
work
with
low
ESR
ceramic
capacitors. Typical applications are in mobile
phone and similar battery powered wireless
systems.
LD3986
SERIES
DUAL ULTRA LOW DROP-LOW NOISE BICMOS VOLTAGE
REG. FOR USE WITH VERY LOW ESR OUT. CAPACITORS
Figure 1: Schematic Diagram
Flip-Chip
Rev. 3


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