MAS9122 Datasheet, PDF (1/12 Pages) List of Unclassifed Manufacturers – 3 Outputs LDO Voltage Regulator IC

DA9122.002
7 September, 2001
MAS9122
3 Outputs LDO Voltage Regulator IC
DESCRIPTION
MAS9122 is a three output voltage regulator. It is
designed for three different output voltages, which
can be modified through a mask option. Regulators
operating mode is controlled by two enable/disable
pins. The circuit consists of a bandgap voltage
reference, an error amplifier, a current limit circuit
and a thermal protection circuit.
FEATURES
• Three Regulators at 135 mA, 70 mA and 50 mA
• Output Options 2.70, 2.85 and 3.00 V, see
Ordering Information p. 12
• Low Noise: 20 µVrms Typical and
30 µVrms Maximum for All Regulators over
Frequency Range 100 Hz…100 kHz
• Fast Dynamic Response
• Output Voltage Accuracy < ±2.0 %
• MSOP-8 Package
BLOCK DIAGRAM
VIN
• Three Low Dropout Voltage
Regulators
• Very Low Noise: 25 µVrms
• High Ripple Rejection: 63 dB
• Very Low Crosstalk
• Low Ground Pin Current
• Regulator Enable/Disable
Control
MAS9122 features very low ground pin current:
typically less than 1.5 µA sleep mode current and
typical 125 µA for one regulator in active mode.
Excellent noise and PSRR performance enables the
use of MAS9122 in high precision portable devices.
Low crosstalk between regulators provides an area
efficient solution compared to single regulators.
APPLICATION
• Systems Requiring Stabilized Power in
Separate Blocks
• Cordless Phones
• Mobile Phones
• Portable Systems
• Battery Powered Systems
ENA
ENBC
& ^LDO_A
135 mA
& ^LDO_B
70 mA
& ^LDO_C
50 mA
Temperature
Protection
OR-
gate
&
Bandgap
Reference
OUT A
OUT B
OUT C
VREF
GND
1 (12)