TC4404/TC4405 1.5A Dual Open-Drain MOSFET Drivers Features General Description Independently Programmable Rise and Fall Times The TC4404/TC4405 are CMOS buffer-drivers constructed with complementary MOS outputs, where Low Output Impedance: 7 Typical the drains of the totem-pole output have been left , t : <30 ns with 1000 pF Load High Speed t R F separated so that individual connections can be made Short Delay Times: <30 ns to the pull-up and pull-down sections of the output. This Wide Operating Range: 4.5V to 18V allows the insertion of drain-current-limiting resistors in Latch-Up Protected: withstands > 500 mA the pull-up and/or pull-down sections, allowing the user Reverse Current (Either Polarity) to define the rates of rise and fall for a capacitive load. It also enables a reduced output swing, if driving a Input Withstands Negative Swings up to -5V resistive load, or limiting base current when driving a Applications bipolar transistor. Minimum rise and fall times, with no resistors, will be less than 30 ns for a 1000 pF load. Motor Controls Driving Bipolar Transistors For driving MOSFETs in motor-control applications, Driver for Non-Overlapping Totem Poles where slow-ON/fast-OFF operation is desired, these devices are superior to the previously used technique Reach-Up/Reach-Down Driver of adding a diode-resistor combination between the TABLE 1: DEVICE SELECTION TABLE driver output and the MOSFET, because they allow accurate control of turn-on, while maintaining fast Part Number Package Temp. Range turn-off and maximum noise immunity for an OFF TC4404COA 8-Lead SOIC 0C to +70C device. TC4404CPA 8-Lead PDIP 0C to +70C When used to drive bipolar transistors, these drivers TC4404EOA 8-Lead SOIC -40C to +85C maintain the high speeds common to other Microchip drivers. They allow insertion of a base current-limiting TC4404EPA 8-Lead PDIP -40C to +85C resistor, while providing a separate half-output for fast TC4405COA 8-Lead SOIC 0C to +70C turn-off. By proper positioning of the resistor, either TC4405CPA 8-Lead PDIP 0C to +70C NPN or PNP transistors can be driven. TC4405EOA 8-Lead SOIC -40C to +85C For driving many loads in low-power regimes, these TC4405EPA 8-Lead PDIP -40C to +85C drivers require significantly less power at higher frequencies and can be helpful in meeting low-power budgets as they eliminate shoot-through currents in the output stage. Package Type 8-Lead PDIP/SOIC V18 A TOP DD V18 A TOP DD 2 7 A BOTTOM IN A 2 7 A BOTTOM IN A TC4404 TC4405 36 B TOP IN B 36 B TOP IN B GND45 B BOTTOM GND45 B BOTTOM 2002-2016 Microchip Technology Inc. DS20001418E-page 1TC4404/TC4405 Because neither drain in an output is dependent on the These devices are built to operate in the most other, these devices can also be used as open-drain demanding electrical environments. They will not buffer/drivers where both drains are available in one latch-up under any conditions within their power and device, thus minimizing chip count. Unused open voltage ratings they are not subject to damage when drains should be returned to the supply rail so that their up to 5V of noise spiking of either polarity occurs on device sources are connected (pull-downs to ground, their ground pin and they can accept, without damage ), to prevent static damage. In addition, pull-ups to V or logic upset, up to 0.5A of reverse current (of either DD in situations where timing resistors or other means of polarity) being forced back into their outputs. All limiting crossover currents are used, like drains from terminals are fully protected against up to 2 kV (HBM) drivers A and B, they may be paralleled for greater of electrostatic discharge. current carrying capacity. Functional Block Diagram 1 V DD TC4404 Inverting 8 (6) 300 mV Pull-Up 7 (5) Pull-Down 2 (3) Input TC4405 Noninverting 4.7V 4 GND Effective A (B) Input C 12 pF DS20001418E-page 2 2002-2016 Microchip Technology Inc.