General Description

The MIC4416 and MIC4417 IttyBitty™ low-side MOSFET drivers are designed to switch an N-channel enhancement type MOSFET from a TTL-compatible control signal in low side switch applications. The MIC4416 is noninverting and the MIC4417 is inverting. These drivers feature short delays and high peak current to produce precise edges and rapid rise and fall times. Their tiny 4-lead SOT-143 package uses minimum space.

The MIC4416/7 is powered from a +4.5V to +18V supply voltage. The on-state gate drive output voltage is approxi mately equal to the supply voltage (no internal regulators or clamps). High supply voltages, such as 10V, are appropriate for use with standard N-channel MOSFETs. Low supply voltages, such as 5V, are appropriate for use with logic-level N-channel MOSFETs.

In a low-side configuration, the driver can control a MOSFET that switches any voltage up to the rating of the MOSFET. The MIC4416 is available in the SOT-143 package and is rated for –40°C to +85°C ambient temperature range.

Features

• +4.5V to +18V operation

• Low steady-state supply current

50µA typical, control input low

370µA typical, control input high

• 1.2A nominal peak output

3.5Ω typical output resistance at 18V supply

7.8Ω typical output resistance at 5V supply

• 25mV maximum output offset from supply or ground

• Operates in low-side switch circuits

• TTL-compatible input withstands –20V

• ESD protection

• Inverting and noninverting versions

Applications

• Battery conservation

• Solenoid and motion control

• Lamp control

• Switch-mode power supplies