MIC5018 IttyBitty High-Side MOSFET Driver General Description Features The MIC5018 IttyBitty high-side MOSFET driver is +2.7V to +9V operation designed to switch an N-channel enhancement-type 150A typical supply current at 5V supply MOSFET from a TTL compatible control signal in high- or 1A typical standby (off) current low-side switch applications. This driver features the tiny Charge pump for high-side low-voltage applications 4-lead SOT-143 package. Internal zener diode gate-to-ground MOSFET protection The MIC5018 is powered from a +2.7V to +9V supply and features extremely low off-state supply current. Operates in low- and high-side configurations An internal charge pump drives the gate output higher TTL compatible input than the driver supply voltage and can sustain the gate ESD protected voltage indefinitely. An internal zener diode limits the gate-to-source voltage to a safe level for standard N-channel MOSFETs. Applications In high-side configurations, the source voltage of the Battery conservation MOSFET approaches the supply voltage when switched Power bus switching on. To keep the MOSFET turned on, the MIC5018s output Solenoid and motion control drives the MOSFET gate voltage higher than the supply voltage. In a typical high-side configuration, the driver is Lamp control powered from the load supply voltage. Under some conditions, the MIC5018 and MOSFET can switch a load voltage that is slightly higher than the driver supply voltage. In a low-side configuration, the driver can control a MOSFET that switches any voltage up to the rating of the MOSFET. The gate output voltage is higher than the typical 3.3V or 5V logic supply and can fully enhance a standard MOSFET. The MIC5018 is available in the SOT-143 package and is rated for 40C to +85C ambient temperature range. Typical Applications +5V V LOAD SUPPLY Load voltage limited only by MOSFET drain-to-source rating * Siliconix MIC5018 30m , 7A max., 30VV max. DS 4.7F IRFZ24* 8-lead SOIC package 23 N-Channel VS G MOSFET +2.7 to +9V 4 1 CTL GND On MIC5018 Off 4.7F Si9410DY* 23 VS G N-channel * International Rectifier 4 1 MOSFET 100m , 17A max. CTL GND TO-220 package On Off Low-Voltage High-Side Power Switch Low-Side Power Switch IttyBitty is a trademark of Micrel, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5018 Ordering Information Part Number Making Temp. Range Package Standard Pb-Free Standard Pb-Free MIC5018BM4 MIC5018YM4 H10 H10 40C to +85C SOT-143 Pin Configuration VS GND 2 1 Part Identification H10 H10 Early production identification: MH10 34 G CTL SOT-143 (M4) Pin Description Pin Number Pin Name Pin Function 1 GND Ground: Power return. 2 VS Supply (Input): +2.7V to +9V supply. 3 G Gate (Output): Gate connection to external MOSFET. Control (Input): TTL compatible on/off control input. Logic high drives the gate output above the supply 4 CTL voltage. Logic low forces the gate output near ground. M9999-042406 April 2006 2 (408) 955-1690