MIC4421A/22A 9A Peak Low-Side MOSFET Drivers Features General Description High Output Current: 9A Peak (Typical) The MIC4421A and MIC4422A MOSFET drivers are rugged, efficient, and easy to use. The MIC4421A is an Wide Operating Range: 4.5V to 18V (Typical) inverting driver, while the MIC4422A is a non-inverting Minimum Pulse Width: 50 ns driver. Latch-Up Proof: Fully Isolated Process is Both versions are capable of 9A (peak) output and can Inherently Immune to Any Latch-Up drive the largest MOSFETs with an improved safe Input Will Withstand Negative Swing of Up to 5V operating margin. The MIC4421A/4422A accepts any High Capacitive Load Drive: 47,000 pF logic input from 2.4V to V without external speed-up S Low Delay Time: 15 ns (Typical) capacitors or resistor networks. Proprietary circuits Logic High Input for Any Voltage from 2.4V to V allow the input to swing negative by as much as 5V S without damaging the part. Additional circuits protect Low Equivalent Input Capacitance: 7 pF (typical) against damage from electrostatic discharge. Low Supply Current: 500 A (Typical) MIC4421A/22A drivers can replace three or more Output Voltage Swing to Within 25 mV of GND or discrete components, reducing PCB area V S requirements, simplifying product design, and reducing assembly cost. Applications Modern Bipolar/CMOS/DMOS construction Switch Mode Power Supplies guarantees freedom from latch-up. The rail-to-rail Motor Controls swing capability of CMOS/DMOS ensures adequate Pulse Transformer Driver gate voltage to the MOSFET during power up/down sequencing. Because these devices are fabricated on Class-D Switching Amplifiers a self-aligned process, they have very low crossover Line Drivers current, run cool, use little power, and are easy to drive. Driving MOSFET or IGBT Parallel Chip Modules Local Power On/Off Switch Pulse Generators Package Types MIC4421A/22A MIC4421A/22A SOIC-8 (M) 5-Lead TO-220 (T) PDIP-8 (N) (Top View) (Top View) VS 1 8 VS 5 OUT 4 GND IN 2 7 OUT 3VS 2 GND NC 3 6 OUT 1IN GND 4 5 GND 2021 Microchip Technology Inc. DS20006511A-page 1 TABMIC4421A/22A Typical Application Circuit LOAD VOLTAGE MIC4422A Si9410DY* 1 7 V S N-CHANNEL OUT VS +15V 0.1F MOSFET 1F 8 6 OUT VS 0.1F 4,5 ON 2 IN GND OFF *SILICONIX 30M, 7A MAX LOAD VOLTAGE LIMITED BY MOSFET DRAIN-TO-SOURCE RATING Functional Block Diagram VS MIC4421A INVERTING 0.3mA 0.1mA Q3 Q2 OUT N IN Q1 MIC4422A Q4 NONINVERTING GND DS20006511A-page 2 2021 Microchip Technology Inc. LOAD
