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PDF ZLDO285 Data sheet ( Hoja de datos )

Número de pieza ZLDO285
Descripción ULTRA LOW DROPOUT REGULATOR
Fabricantes Zetex Semiconductors 
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No Preview Available ! ZLDO285 Hoja de datos, Descripción, Manual

2.85 VOLT ULTRA LOW DROPOUT
REGULATOR
ZLDO285
ISSUE 2 - JUNE 1997
DEVICE DESCRIPTION
The ZLDO Series low dropout linear regulators
operate with an exceptionally low dropout
voltage, typically only 30mV with a load
current of 100mA. The regulator series features
output voltages in the range 2.85 to 12 volts, this
device provides an output voltage of 2.85 volts.
The ZLDO285 consumes a typical quiescent
current of only 1mA at its maximum rated
output current of 300mA. A battery low flag is
available to indicate potential power fail
situations. If the input voltage falls to within
200mV of the regulated output voltage then the
error output pulls low. The device also features
an active high disable control. Once disabled
the ZLDO quiescent current falls to typically
11µA.
The ZLDO devices are packaged in Zetex SM8
8 pin small outline surface mount package,
ideal for applications where space saving is
important. The device low dropout voltage,
low quiescent current and small size make it
www.DataSheeit4dUe.caoml for low power and battery powered
applications. Battery powered circuits can
make particular use of the low battery flag and
shutdown features.
FEATURES
Very low dropout voltage
6mV dropout at 10mA output
30mV dropout at 100mA output
100mV dropout at 300mA output
2.85 volt fixed output
Other voltages available
Low quiescent current
1mA quiescent (typ) at 300mA output
Low battery flag
Shutdown control
Surface mount package
APPLICATIONS
Battery powered devices
Portable instruments
Portable communications
Laptop/Palmtop computers
Electronic organisers
Low Battery Flag
THERMAL
SHUTDOWN
LOW BATTERY
COMPARATOR
Vin
Vo
Shutdown
Control
SHUTDOWN
BIAS
CIRCUIT
OUTPUT
DRIVE
BANDGAP
REFERENCE
Cs
Shaping
Gnd

1 page




ZLDO285 pdf
ZLDO285
TYPICAL CHARACTERISTICS
220
200
180
160
140
120
100
80
60
85°C
25°C
-40°C
40
20
0
0.1 1 10 100 1000
Load Current (mA)
Dropout Voltage v Load Current
Vin=10v
Vin=5v
0.8
0.4
0
Io=100mA
Output Voltage Deviation
-0.4
0
200 400 600 800
Time (µs)
Line Transient Response
1000
Vin=5v
Io=100mA
Io=0mA
0.4
0
-0.2
Output Voltage Deviation
-0.4
0
40 80 120 160
Time (µs)
Load Transient Response
200
1.0
10ms
DC 1s 0.1s
0.1
0.01
1
2
5 10 20
Input-Output Differential Voltage (V)
Safe Operating Area
Operation in shaded area is not guaranteed

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