MIC94066/MIC94067/MIC94068/MIC94069 Dual High Side Power Switches - Micrel - #1

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MIC94066-69 Dual High Side Power Switches MLF and MicroLead Frame is a registered trademark of Amkor Technologies Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com General Description The MIC94066-69 are dual high-side load switches designed for operation between 1.7V to 5.5V. The devices contain a pair of low on-resistance, 115mÙ(max) P-channel MOSFETs that support over 2A of continuous current. The MIC94067 and MIC94069 feature an active load discharge circuit which insures capacitive loads retain no charge when the main switch is in an OFF state. An active pull-down on the enable input keeps MIC94066-69 in a default OFF state until the EN pin is pulled to a high level. The built-in level shift circuitry allows for a logic signal that may be different from the supply voltage to switch the high-side P-channel MOSFET on or off. MIC94066-67 feature rapid turn on while MIC94068-69 provide a slew rate controlled Soft-Start turn-on of 800ìs (typical) to prevent in-rush current from glitching supply rails. MIC94066-69’s voltage range makes them suitable for 1-cell Lithium ion and 2- to 3-cell NiMH/NiCad/Alkaline powered systems, as well as all 5V applications. Their low operating current of 2ìA and low shutdown current of <1ìA maximize battery life. Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com. Features • 1.7V to 5.5V input voltage range • 2A continuous operating current • 85mÙ (typ) RON • Built-in level shift for control logic; can be operated by 1.5V logic. • Low 2ìA quiescent current • Soft-Start: MIC94068-69 • Micro-power shutdown <1ìA • Load discharge circuit: MIC94067, MIC94069 • Space saving 2mm x 2mm MLF™ Applications • Load switch in portable applications: - Cellular phones - PDAs - MP3 players - Digital Cameras - Portable instrumentation • Battery switch-over circuits • Level translators ____________________________________________________________________________________________________ Typical Application ½ MIC94066, 68 Load Switch Application ½ MIC94067, 69 Load Switch with Capacitive Load Discharge August 2006 M9999-082406