4030B Datasheet PDF - Micrel Semiconductor

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4030B
Micrel Semiconductor

Part Number 4030B
Description TinyFET P-Channel MOSFET Preliminary Information
Page 4 Pages


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MIC94030/94031
MIC94030/94031
TinyFET™ P-Channel MOSFET
Preliminary Information
Micrel
General Description
The MIC94030 and MIC94031 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 MIC94030/1 exhibits an on-resistance of typically
0.75at 4.5V gate-to-source voltage. The MIC94030/1 also
operates with only 2.7V gate-to-source voltage.
The MIC94030 is the basic 4-lead P-channel MOSFET. The
MIC94031 is a variation that includes an internal gate pull-up
resistor that can reduce the system parts count in many
applications.
The 4-terminal SOT-143 package permits a substrate con-
nection separate from the source connection. This 4-terminal
configuration improves the θJA (improved heat dissipation)
and makes analog switch applications practical.
The small size, low threshold, and low RDS(on) make the
MIC94030/1 the ideal choice for PCMCIA card sleep mode or
distributed power management applications.
Features
• 13.5V minimum drain-to-source breakdown
• 0.75typical on-resistance
at 4.5V gate-to-source voltage
• 0.45typical on-resistance
at 10V gate-to-source voltage
• Operates with 2.7V gate-to-source voltage
• Separate substrate connection for added control
• Industry’s smallest surface mount package
Applications
• Distributed power management
• PCMCIA card power management
• Battery-powered computers, peripherals
• Hand-held bar-code scanners
• Portable communications equipment
Ordering Information
Part Number
Temperature Range*
MIC94030BM4
–55°C to +150°C
MIC94031BM4
–55°C to +150°C
* Operating Junction Temperature
Package
SOT-143
SOT-143
Pin Configuration
Typical PCB Layout
Drain Substrate
Part
Identification
P3x
Part Number
MIC94030BM4
MIC94031BM4
Identification
P30
P31
D
PCB heat sink
plane improves
heat dissipation
SS
Gate Source
SOT-143 Package (M4)
GS
PCB traces
6
Schematic Symbol
Gate
Source
Substrate
Drain
Schematic Symbol
Patents 5,355,008; 5,589,702
1997
Functional Diagrams
S
S
~500k
G SS G
SS
Internal
gate-to-source
D
pull-up resistor
D
MIC94030
MIC94031
6-41

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