MAS9123(2000) Просмотр технического описания (PDF) - Micro Analog Systems Oy
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MAS9123 Datasheet PDF : 10 Pages
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DA9123.002
26 September, 2000
This is preliminary information on a new
product under development. Micro Analog
Systems Oy reserves the right to make any
changes without notice.
MAS9123
80mA LDO Voltage Regulator IC
• Very Low Noise: 9.5 µVrms
• Very Short Start-up Time: 20 µs
• Excellent Ripple Rejection: 68 dB
• Stable Even with Low-ESR Output
Capacitor: min. ESR 0.05
• Low Minimum Output Capacitance
Requirement: 0.22 µF
• Regulator Enable/Disable Control
DESCRIPTION
MAS9123 is a low dropout voltage regulator with an
enable/disable pin, which allows device to be turned
off or on by pulling control to low or high.
Due to the very low noise level of only 9.5 µVrms
MAS9123 is highly suitable for very sensitive
circuits, e.g., in portable applications. In addition to
the noise levels, MAS9123 excels in dropout
voltage (95 mV typical at 50 mA) and in start-up
time (typically 20 µs from start-up to within ±1% of
Vnom). Also its ripple rejection ability of 68 dB at 10
kHz exceed that of competition.
The very wide range of the values of Equivalent
Series Resistance (ESR) of output capacitors can
be used with MAS9123. This ESR range from a few
mΩ up to a couple of Ohms combined with no
FEATURES
minimum output current requirement makes the
usage of MAS9123 easier and low in cost. Also the
minimum output capacitance requirement is very
low. This combined with very short start-up time
makes it possible to switch the regulator off and on
even in timing critical and/or noise sensitive
applications.
An internal thermal protection circuit prevents the
device from overheating. Also the maximum output
current is internally limited. In order to save power
the device goes into sleep mode when the regulator
is disabled.
APPLICATION
• Output accuracy < ± 2%
• Very Low Noise
• Internal Thermal Shutdown
• Short Circuit Protection
• SOT23-5 Package
• Pin Compatible with LP2982
• Output Voltage Options: 2.8, 3.0 and 3.3 V
(Contact MAS Sales for other voltage options
between 2.5 and 3.3 V)
PIN CONFIGURATION
VOUT
• RF-Oscillators
• Cellular Phones
• Cordless Phones
• Pagers
• Battery Powered Systems
• Portable Systems
• Radio Control Systems
BYPASS
Top View
5
4
23AX
Top Marking Information:
23A1 = 3.3 V
23A2 = 2.8 V
23A6 = 3.0 V
12 3
VIN GND CTRL
1 (10)
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