DA9161.010
28 January 2004
MAS9161
80 mA LDO Voltage Regulator IC
• Only 10.5 µA Ground Pin Current
at 1 mA Load Current
• Good Transient Performance
• Low Dropout Voltage: 200 mV
• Low Noise
• Enable/Disable Control
• Stable with Low-ESR Output
Capacitors
DESCRIPTION
MAS9161 LDO voltage regulator is optimized for
operation at low ground pin current of just 10.5 µA.
This combined with the good overall performance
makes MAS9161 very suitable for providing
continuous supply in low power circuits. The
performance of MAS9161 benefits applications
where standby periods are long and where long
battery life is essential.
In addition to the low ground pin current, MAS9161
excels in dropout voltage (200 mV typical at
80 mA). Even though MAS9161 does not use an
external bypass capacitor, the noise level
(100 Hz… 100 kHz) is only 70 µVrms with 1 µF
output capacitor.
is very wide. This ESR range from zero up to a
couple of Ohms combined with no minimum output
current requirement makes the usage of MAS9161
easier and low in cost.
Enable/disable pin allows MAS9161 to be turned off
and on. In order to save power the device enters
the sleep mode when the regulator is disabled.
MAS9161A also includes an auto-discharge
function, wherein a shutdown transistor turns on
and discharges the output capacitor. MAS9161B
does not feature an auto-discharge function.
An internal thermal protection circuit prevents the
device from overheating. Also the maximum output
current is internally limited.
The Equivalent Series Resistance (ESR) range of
output capacitors that can be used with MAS9161
FEATURES
APPLICATIONS
• Extremely Low Current Consumption
• Good Transient Performance
• Output Accuracy < ± 3.3%
• Internal Thermal Shutdown
• Short Circuit Protection
• Thin SOT (TSOT-5) or WL-CSP Package
• Several Output Voltage Options Available,
see Ordering Information p. 15
• Continuously Working Low Power Circuits
• Bluetooth Modules
• Digital Circuits
• Real-Time Clocks (RTC)
• SRAMs
• CMOS Backup Power
• Cellular Phones
• Portable Systems
• Smoke Detectors
1 (17)
