onsemi MC34280
The MC34280 is a power supply integrated circuit which provides two boost regulated outputs and some power management supervisory functions. Both regulators apply Pulse–Frequency–Modulation (PFM). The main step–up regulator output can be externally adjusted from 2.7V to 5V.| Part No. | MC34280 |
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| Datasheet | MC34280 Download |
| Manufacturer |  onsemi |
| Description | Power Supply & Management IC for Handheld Electronic Products |
| Buy | Stock & Price |
FEATURES
: VMAIN VMAINSW VMAINGND NC LIBAOUT LIBATIN VAUXEMR VAUXSW 32 1 VMAINFB VBAT ENABLE VDD PDELAY VREF AGND IREF LOWBATSEN NC VAUXBASE VAUXCHG VAUXBDV VAUXFBN VAUXREF VAUXFBP VAUXEN MC34280● Low Input Voltage, 1V up
● Low Quiescent Current in Standby Mode: 35µA typical
● PFM and Synchronous Rectification to ensure high efficiency
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● (87% @200mA Load) Adjustable Main Output: nominal 3.3V @ 200mA max, with 1.8V input Auxiliary Output Voltage can be digitally controlled by microprocessor Auxiliary Output Voltage: +5V @ 25mA max, with 1.8V input +25V @ 15mA max, with 1.8V input Current Limit Protection Power–ON Reset Signal with Programmable Delay Battery Low Detection Lithium Battery Back–up 32–Pin LQFP Package PIN CONNECTIONS
APPLICATIONS
: Digital Organizer and Dictionary Personal Digital Assistance (PDA) Dual Output Power Supply (For MPU, Logic, Memory, LCD) Handheld Battery Powered Device (1–2 AA/AAA cell) ORDERING INFORMATION Device MC34280FTB MC34280FTBR2 Package LQFP LQFP Shipping 250 Units/Tray 1800 Tape & Reel © Semiconductor Components Industries, LLC, 1999 1 February, 2000 – Rev.
