MIC4421/4422 Micrel, Inc. MIC4421/4422 9A-Peak Low-Side MOSFET Driver Bipolar/CMOS/DMOS Process General Description Features BiCMOS/DMOS Construction MIC4421 and MIC4422 MOSFET drivers are rugged, ef- Latch-Up Proof: Fully Isolated Process is Inherently cient, and easy to use. The MIC4421 is an inverting driver, Immune to Any Latch-up. while the MIC4422 is a non-inverting driver. Input Will Withstand Negative Swing of Up to 5V Both versions are capable of 9A (peak) output and can drive Matched Rise and Fall Times ............................... 25ns the largest MOSFETs with an improved safe operating mar- High Peak Output Current ...............................9A Peak gin. The MIC4421/4422 accepts any logic input from 2.4V to Wide Operating Range .............................. 4.5V to 18V V without external speed-up capacitors or resistor networks. High Capacitive Load Drive ...........................47,000pF S Proprietary circuits allow the input to swing negative by as Low Delay Time .............................................30ns Typ. much as 5V without damaging the part. Additional circuits Logic High Input for Any Voltage from 2.4V to V S protect against damage from electrostatic discharge. Low Equivalent Input Capacitance (typ) .................7pF Low Supply Current .............. 450A With Logic 1 Input MIC4421/4422 drivers can replace three or more discrete Low Output Impedance .........................................1.5 components, reducing PCB area requirements, simplifying Output Voltage Swing to Within 25mV of GND or V S product design, and reducing assembly cost. Modern Bipolar/CMOS/DMOS construction guarantees Applications freedom from latch-up. The rail-to-rail swing capability of Switch Mode Power Supplies CMOS/DMOS insures adequate gate voltage to the MOS- Motor Controls FET during power up/down sequencing. Since these devices Pulse Transformer Driver are fabricated on a self-aligned process, they have very low Class-D Switching Ampliers crossover current, run cool, use little power, and are easy Line Drivers to drive. Driving MOSFET or IGBT Parallel Chip Modules Local Power ON/OFF Switch Pulse Generators Functional Diagram V S MIC4421 INVERTING 0.3mA 0.1mA OUT IN 2k MIC4422 NONINVERTING GND Micrel, Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 MIC4421/4422 Micrel, Inc. Ordering Information Part Number Standard PbFree Conguration Temp. Range Package MIC4421BM MIC4421YM Inverting 40C to +85C 8-pin SOIC MIC4421BN MIC4421YN Inverting 40C to +85C 8-pin DIP MIC4421CM MIC4421ZM Inverting 0C to +70C 8-pin SOIC MIC4421CN MIC4421ZN Inverting 0C to +70C 8-pin DIP MIC4421CT MIC4421ZT Inverting 0C to +70C 5-pin TO-220 MIC4422BM MIC4422YM Non-inverting 40C to +85C 8-pin SOIC MIC4422BN MIC4422YN Non-inverting 40C to +85C 8-pin DIP MIC4422CM MIC4422ZM Non-inverting 0C to +70C 8-pin SOIC MIC4422CN MIC4422ZN Non-inverting 0C to +70C 8-pin DIP MIC4422CT MIC4422ZT Non-inverting 0C to +70C 5-pin TO-220 Pin Congurations VS 1 8 V S IN 2 7 OUT NC 3 6 OUT GND 4 5 GND Plastic DIP (N) SOIC (M) 5 OUT 4 GND 3 VS 2 GND 1 IN TO-220-5 (T) Pin Description Pin Number Pin Number Pin Name Pin Function TO-220-5 DIP, SOIC 1 2 IN Control Input 2, 4 4, 5 GND Ground: Duplicate pins must be externally connected together. 3, TAB 1, 8 V Supply Input: Duplicate pins must be externally connected together. S 5 6, 7 OUT Output: Duplicate pins must be externally connected together. 3 NC Not connected. M9999-081005 2 August 2005