DA9251.001 25 October, 2001
This is preliminary information on a new product under development. Micro Analog Systems Oy...
DA9251.001 25 October, 2001
This is preliminary information on a new product under development. Micro Analog Systems Oy reserves the right to make any changes without notice.
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MAS9251 is a low noise, constant frequency switched capacitor
voltage doubler with regulated output. In the adjustable output version an external feedback pin allows the output
voltage to be adjusted. The high switching frequency of MAS9251 guarantees low output ripple even with small ceramic
capacitors. The shutdown control pin can be used to turn off the device for power saving. MAS9251 is equipped with soft-start feature, which reduces the circuit’s disturbance to power supply lines during start-up by limiting the maximum input current. Low operating input
voltage and low external part count make MAS9251 ideal for small battery powered portable systems. An internal thermal protection circuit prevents the device from overheating. Also the maximum output current is internally limited.
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Two versions: Adjustable Output Fixed 5 V Output Solution without Inductors Soft-Start Output Accuracy < ± 4% Low External Part Count Low Noise Input
Voltage Range: 2.7 V… 4.5 V Shutdown Control 1 MHz Switching Frequency Internal Thermal Shutdown ...
