MAS9123 查看數據表（PDF） - Micro Analog systems
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MAS9123 Datasheet PDF : 12 Pages
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APPLICATION INFORMATION
DA9123.007
3 May 2004
CTRL 3
VOLTAGE
REFERENCE
OVER CURRENT /
OVER TEMPERATURE
PROTECTION
VIN
1
+
5 VOUT
4
BYPASS
CL
CIN
CBYPASS
2
GND
Auto-Discharge
Function
MAS9123 has a
shutdown
transistor that
turns on, when
the device is
disabled, and
discharges the
output capacitor.
Parameter
Symbol Min Typ Max Unit
Note
Output
Capacitance
CL
0.23 1.0
µF 1. Ceramic and film capacitors
can be used.
2. The value of CL should be
smaller than or equal to the
Effective Series
ESR
0.01
value of CIN.
2
Ω 1. When within this range stable
Resistance
with all IOUT = 0 mA…80 mA
values.
Bypass Capacitance
CBYPASS
3
10
nF 1. Ceramic and film capacitors
are best suited. For maximum
output voltage accuracy DC
leakage current through
capacitor should be kept as
low as possible. In any case
DC leakage current must be
below 100 nA.
Input Capacitance
CIN
0.5
µF 1. A big enough input
capacitance is needed to
prevent possible impedance
interactions between the
supply and MAS9123.
2. Ceramic, tantalum, and film
capacitors can be used. If a
tantalum capacitor is used, it
should be checked that the
surge current rating is
sufficient for the application.
3. In the case that the
inductance between a battery
and MAS9123 is very small
(< 0.1 µH), a 0.47 µF input
capacitor is sufficient.
4. The value of CIN should not
be smaller than the value of
CL.
Values given on the table are minimum requirements unless otherwise specified. When selecting capacitors,
tolerance and temperature coefficient must be considered to make sure that the requirement is met in all
potential operating conditions.
8 (12)
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