MIC9409x: High Side Load Switches for Consumer Applications - Micrel - #1

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MIC94090/1/2/3/4/5 High Side Load Switches for Consumer Applications MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com March 2009 M9999-033109-A General Description The MIC94090/1/2/3/4/5 is a family of high-side load switches designed for operation from 1.7V to 5.5V input voltage. The load switch pass element is an internal 130mÙ RDS(ON) Pchannel MOSFET which enables the device to support up to 1.2A continuous current. Additionally, the load switch supports 1.5V logic level control and shutdown features. The MIC94090 and MIC94091 feature rapid turn on. The MIC94092 and MIC94093 provide a slew rate controlled softstart turn-on of 790ìs, while the MIC94094 and MIC94095 provide a slew rate controlled soft-start turn-on of 120ìs. The soft-start feature option prevents an in-rush current event from pulling down the input supply voltage. The MIC94091, MIC94093, and MIC94095 include a 250Ù auto discharge load circuit that is switched on when the load switch is disabled. An active pull-down on the enable input keeps the MIC94090/1/2/3/4/5 in a default OFF state until the enable pin is pulled above 1.25V. Internal level shift circuitry allows low voltage logic signals to switch higher supply voltages. The enable voltage can be as high as 5.5V and is not limited by the input voltage. The MIC94090/1/2/3/4/5 operating voltage range makes them ideal for Lithium ion and NiMH/NiCad/Alkaline battery powered systems, as well as non-battery powered applications. The devices provide low quiescent current and low shutdown current to maximize battery life. Datasheets and support documentation can be found on Micrel’s web site at: www.micrel.com. Features • 1.7V to 5.5V input voltage range • 1.2A continuous operating current • 130mÙ RDS(ON) • Internal level shift for CMOS/TTL control logic • Ultra low quiescent current • Micro-power shutdown current • Rapid turn-on: MIC94090/1 • Soft-Start: MIC94092/3 (790ìs), MIC94094/5 (120ìs) • Load discharge circuit: MIC94091/3/5 • Space saving and thermally capable 1.2mm x 1.2mm Thin MLF® package • Industry standard SC-70-6 package Applications • Cellular phones • Portable Navigation Devices (PND) • GPS modules • Personal Media Players (PMP) • Ultra Mobile PCs • Other Portable applications • PDAs • Portable instrumentation • Industrial and DataComm equipment _________________________________________________________________________________________________________ Typical Application MIC94090 (ultra fast turn on) MIC94092 (790ìs soft-start) MIC94094 (120ìs soft-start) MIC94091 (ultra fast turn on with auto-discharge) MIC94093 (790ìs soft-start with auto-discharge) MIC94095 (120ìs soft-start with auto-discharge)