MIC94080/1/2/3/4/5: 67m - Micrel - #1

Text version of the page

MIC94080/1/2/3/4/5 67mÙ RDSON 2A High Side Load Switch in 0.85mm x 0.85mm Thin MLF® Package MLF and MicroLeadFrame is a registered trademark 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 July 2009 M9999-071509-C General Description The MIC94080/1/2/3/4/5 is a family of high-side load switches designed to operate from 1.7V to 5.5V input voltage. The load switch pass element is an internal 67mÙ RDSON P-Channel MOSFET which enables the device to support up to 2A of continuous current. Additionally, the load switch supports 1.5V logic level control and shutdown features in a tiny 0.85mm x 0.85mm 4-pin Thin MLF® package. The MIC94080 and MIC94081 feature rapid turn on. The MIC94082 and MIC94083 provide a slew rate controlled softstart turn-on of 800ìs, while the MIC94084 and MIC94085 provide a slew rate controlled soft-start turn-on of 120ìs. The soft-start feature is provided to prevent an in-rush current event from pulling down the input supply voltage. The MIC94081, MIC94083, and MIC94085 feature an active load discharge circuit which switches in a 250Ù load when the switch is disabled to automatically discharge a capacitive load. An active pull-down on the enable input keeps the MIC94080/1/2/3/4/5 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 MIC94080/1/2/3/4/5 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 Ó 0.85mm x 0.85mm space saving 4-pin Thin MLF® package Ó 1.7V to 5.5V input voltage range Ó 2A continuous operating current Ó 67mÙ RDSON Ó Internal level shift for CMOS/TTL control logic Ó Ultra low quiescent current Ó Micro-power shutdown current Ó Soft-Start: MIC94082/3 (800ìs), MIC94084/5 (120ìs) Ó Load discharge circuit: MIC94081, MIC94083, MIC94085 Ó Ultra fast turn off time Ó Junction operating temperature from -40ºC to +125ºC Applications Ó Cellular phones Ó Portable Navigation Devices (PND) Ó Personal Media Players (PMP) Ó Ultra Mobile PCs Ó Portable instrumentation Ó Other Portable applications Ó PDAs Ó GPS Modules Ó Industrial and DataComm equipment ________________________________________________________________________________________________________ Typical Application Level Shift and Slew Rate Control Load EN VIN GND VOUT MIC94080 (ultra fast turn on) MIC94082 (800ìs soft-start) MIC94084 (120ìs soft-start) Level Shift Slew Rate Control & Load Discharge Load EN VIN GND VOUT MIC94081 (ultra fast turn on with auto-discharge) MIC94083 (800ìs soft-start with auto-discharge) MIC94085 (120ìs soft-start with auto-discharge)