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MC33680FTB 数据表(PDF) 1 Page - ON Semiconductor |
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MC33680FTB 数据表(HTML) 1 Page - ON Semiconductor |
1 / 14 page © Semiconductor Components Industries, LLC, 2006 July, 2006 − Rev. 4 1 Publication Order Number: MC33680/D MC33680 Dual DC−DC Regulator for Electronic Organizer The MC33680 is a dual DC−DC regulator designed for electronic organizer applications. Both regulators apply Pulse−Frequency−Modulation (PFM). The main step−up regulator output can be externally adjusted from 2.7V to 5V. An internal synchronous rectifier is used to ensure high efficiency (achieve 87%). The auxiliary regulator with a built−in power transistor can be configured to produce a wide range of positive voltage (can be used for LCD contrast voltage). This voltage can be adjusted from +5V to +25V by an external potentiometer. The MC33680 has been designed for battery powered hand−held products. With the low start−up voltage from 1V and the low quiescent current (typical 35 μA); the MC33680 is best suited to operate from 1 to 2 AA/ AAA cell. Moreover, supervisory functions such as low battery detection, CPU Power−Good signal, and back−up battery control, for lithium battery or supercap are also included in the chip. FEATURES: • Low Input Voltage, 1V up • Low Quiescent Current in Standby Mode: 35μA typical • PFM and Synchronous Rectification to ensure high efficiency (87% @60mA Load) • Adjustable Main Output: +2.7V to +5V nominal 3.3V @ 100mA max, with 1.8V input • Auxiliary Output Voltage: +5V to +25V +5V @ 25mA max, with 1.8V input +25V @ 15mA max, with 1.8V input • Current Limit Protection • Power−Good Signal with Programmable Delay • Battery Low Detection • Lithium Battery or Supercap Back−up • 32−Pin LQFP Package APPLICATIONS: • Digital Organizer and Dictionary • Dual Output Power Supply (For MPU, Logic, Memory, LCD) • Handheld Battery Powered Device (1−2 AA/AAA cell) 32−LEAD LQFP FTB SUFFIX CASE 873A PIN CONNECTIONS & DEVICE MARKING (Top View) Device Package Shipping ORDERING INFORMATION MC33680FTB LQFP 1250 Tray / Drypack 1 32 LOWBATSEN NC DGND LIBATCL LOWBATB PORB DGND FTB LIBATON VAUXSW VAUXEMR LIBATIN LIBATOUT NC VMAINGND VMAINSW VMAIN MC33680 AWLYYWW MC33680FTBR2 LQFP 1800 / Tape & Reel http://onsemi.com |
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类似说明 - MC33680FTB |
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