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MAS9251 Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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MAS9251 Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
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1 / 11 page  1 (11) DA9251.001 25 October, 2001 0$6 5HJXODWHG&KDUJH3XPS '&'&&RQYHUWHU • 6ROXWLRQ ZLWKRXW ,QGXFWRUV • P$ 2XWSXW &XUUHQW • )L[HG 9 RU $GMXVWDEOH2XWSXW 9ROWDJH • /RZ1RLVH • 0+] 6ZLWFKLQJ )UHTXHQF\ • ,&& µ$ LQ 6KXW 'RZQ • 0623DQG &633DFNDJHV '(6&5,37,21 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. )($785(6 $33/,&$7,216 • 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 • Short Circuit Protection • MSOP-8 and CSP Packages • LED Backlighting • White LED Driver • LED Brightness Control • Li-Ion Battery Backup Supplies • Local 3 V to 5 V Conversion • Smart Card Readers • PCMCIA Local 5 V Supplies 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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