MIC94050/94051 Micrel MIC94050/94051
4-Terminal SymFETв„ў P-Channel MOSFET General Description
The MIC94050 and MIC94051 are 4-terminal silicon gate
P-channel MOSFETs that provide low on-resistance in a very
small package.
Designed for high-side switch applications where space is
critical, the MIC94050/1 exhibits an on-resistance of typically
0.125О© at 4.5V gate-to-source voltage. The MIC94050/1 also
operates with only 1.8V gate-to-source voltage.
The MIC94050 is the basic 4-lead P-channel MOSFET. The
MIC94051 is a variation that includes an internal gate pullup resistor that can reduce the system parts count in many
applications. SymFETв„ў Features 0.125О© typical on-resistance
at 4.5V gate-to-source voltage Operates with 1.8V gate-to-source voltage Separate substrate connection allows reverse-blocking Applications The 4-terminal SOT-143 package permits a substrate connection separate from the source connection. This 4-terminal
configuration improves the θJA (improved heat dissipation)
and makes reverse-blocking switch applications practical.
The small size, low threshold, and low RDS(on) make the
MIC94050/1 the ideal choice for PCMCIA, USB, back-up
battery-power, and distributed power management applications. Distributed power management
PCMCIA card power management
USB ports
Battery-powered computers, peripherals
Handheld bar-code scanners
Portable communications equipment …
