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PDF LDS3985 Data sheet ( Hoja de datos )
| Número de pieza | LDS3985 | |
| Descripción | ULTRA LOW DROP-LOW NOISE BICMOS | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LDS3985 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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LDS3985
SERIES
ULTRA LOW DROP-LOW NOISE BICMOS 300mA V.REG.
FOR USE WITH VERY LOW ESR OUTPUT CAPACITOR
s INPUT VOLTAGE FROM 2.5V TO 6V
s STABLE WITH LOW ESR CERAMIC
CAPACITORS
s ULTRA LOW DROPOUT VOLTAGE (150mV
TYP. AT 300mA LOAD, 0.4mV TYP. AT 1mA
LOAD)
s VERY LOW QUIESCENT CURRENT (85µA
TYP. AT NO LOAD, 200µA TYP. AT 300mA
LOAD; MAX 1.5µA IN OFF MODE)
DFN6
SOT23-5L
s GUARANTEED OUTPUT CURRENT UP TO
300mA
s WIDE RANGE OF OUTPUT VOLTAGE:
1.25V; 1.35; 1.5V; 1.8V; 2V; 2.1V; 2.2V; 2.5V;
2.6V; 2.7V; 2.8V; 2.85V; 2.9V; 3V; 3.1V; 3.2V;
3.3V; 4.7V
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
s FAST TURN-ON TIME: TYP. 240µs
slightly in dropout, further prolonging the battery
[CO=2.2µF, CBYP= 33nF AND IO=1mA]
life. Shutdown Logic Control function is available,
s LOGIC-CONTROLLED ELECTRONIC
this means that when the device is used as local
SHUTDOWN
www.DataSheet4U.coms INTERNAL CURRENT AND THERMAL LIMIT
regulator, it is possible to put a part of the board in
standby, decreasing the total power consumption.
s OUTPUT LOW NOISE VOLTAGE 30µVRMS
OVER 10Hz to 100KHz
Typical applications are in mobile phone and
similar battery powered wireless systems,
s S.V.R. OF 55dB AT 1KHz, 50dB AT 10KHz
portable information appliances.
s TEMPERATURE RANGE: -40°C TO 125°C
DESCRIPTION
The LDS3985 provides up to 300mA, from 2.5V to
6V input voltage.
Figure 1: Schematic Diagram
December 2004
Rev. 1
1/13
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1 page  
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LDS3985 SERIES
TYPICAL PERFORMANCE CHARACTERISTICS (Tj = 25°C, VI = VO(NOM) +0.5V, CI = 1µF, CO = 2,2µF,
CBYP = 33nF, IO = 1mA, VINH = 1.4V, unless otherwise specified)
Figure 4: Output Voltage vs Temperature
Figure 7: Shutdown Voltage vs Temperature
Figure 5: Output Voltage vs Temperature
Figure 8: Shutdown Voltage vs Temperature
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Figure 6: Output Voltage vs Temperature
Figure 9: Line Regulation vs Temperature
5/13
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5 Page 
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LDS3985 SERIES
DIM.
A
C
D
N
T
Ao
Bo
Ko
Po
P
Tape & Reel QFNxx/DFNxx (3x3) MECHANICAL DATA
MIN.
12.8
20.2
60
mm.
TYP
3.3
3.3
1.1
4
8
MAX.
330
13.2
18.4
MIN.
0.504
0.795
2.362
inch
TYP.
0.130
0.130
0.043
0.157
0.315
MAX.
12.992
0.519
0.724
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11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LDS3985.PDF ] | |
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