MIC94070/71/72/73
High Side Power Switches
General Description
The MIC94070-73 are high-side load switches designed for...
MIC94070/71/72/73
High Side Power Switches
General Description
The MIC94070-73 are high-side load switches designed for operation between 1.7V to 5.5V. The devices contain a low on-resistance P-channel
MOSFET that supports 1.2A of continuous current. The MIC94071 and MIC94073 feature an active load discharge circuit which insures capacitive loads retain no charge when the main switch is in an OFF state. MIC94070-71 feature rapid turn on while MIC94072-73 provide a slew rate controlled Soft-Start turn-on of 800µs (typical) to prevent in-rush current from glitching supply rails. An active pull-down on the enable input keeps MIC94070-73 in a default OFF state until the EN pin is pulled to a high level. Built-in level shift circuitry allows low
voltage logic signals to switch higher supply
voltages, or vice versa; high level logic signals can control low level
voltages. MIC94070-73’s operating
voltage range makes them suitable for 1-cell Lithium ion and 2- to 3-cell NiMH/NiCad/Alkaline powered systems, as well as all 5V applications. Their low operating current of 2µA and low shutdown current of <1µA maximize battery life. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com.
Features
1.7V to 5.5V input
voltage range 1.2A continuous operating current 3A pulse current 120mΩ RDSON (typical) Built-in level shift for control logic; can be operated by 1.5V logic. Low 2µA quiescent current Soft-Start: MIC94072/73 Micro-power s...