MIC94050 Micrel Semiconductor, MIC94050 Datasheet

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MIC94050

Manufacturer Part Number
MIC94050
Description
4-Terminal TinyFET P-Channel MOSFET
Manufacturer
Micrel Semiconductor
Datasheet

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Part Number
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Quantity
Price
Part Number:
MIC94050BM4
Manufacturer:
MICREL
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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
0.125 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 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
and makes reverse-blocking switch applications practical.
The small size, low threshold, and low R
MIC94050/1 the ideal choice for PCMCIA, USB, back-up
battery-power, and distributed power management applica-
tions.
Pin Configuration
Schematic Symbol
July 2002
Identification
TinyFET is a trademark of Micrel, Inc.
MIC94050/94051
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
Part
Drain
Gate
SOT-143 Package (M4)
P5x
Schematic Symbol
Gate
Substrate
Source
JA
Source
Drain
Substrate
(improved heat dissipation)
Part Number
MIC94050BM4
MIC94051BM4
DS(on)
Identification
make the
P50
P51
1
Features
• 0.125 typical on-resistance
• Operates with 1.8V gate-to-source voltage
• Separate substrate connection allows reverse-blocking
Applications
• Distributed power management
• PCMCIA card power management
• USB ports
• Battery-powered computers, peripherals
• Handheld bar-code scanners
• Portable communications equipment
• Reverse blocking battery management
Ordering Information
* Operating Junction Temperature
Typical PCB Layout
Functional Diagrams
Part Number
MIC94050BM4
MIC94051BM4
4-Terminal TinyFET™ P-Channel MOSFET
G
at 4.5V gate-to-source voltage
MIC94050
MIC94050/94051
S
D
Temperature Range*
–40 C to +150 C
–40 C to +150 C
D
G
PCB traces
SS
Final
~350k
Internal
gate-to-source
pull-up resistor
SS
G
S
plane improves
heat dissipation
PCB heat sink
MIC94051
MIC94050/94051
Package
SOT-143
SOT-143
S
D
SS
Micrel

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MIC94050 Summary of contents

Page 1

... MIC94050/1 exhibits an on-resistance of typically 0.125 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 pull-up resistor that can reduce the system parts count in many applications ...

Page 2

... C unless noted. Substrate connected to source for all conditions. A Note 2. ESD gate protection diode conducts during positive gate-to-source voltage excursions. IC devices are inherently ESD sensitive. Handling precautions required Note 3. MIC94050 only. Note 4. MIC94051 only. Note 5. Pulse Test: Pulse Width 80 s, Duty Cycle ...

Page 3

... GATE-TO-SOURCE VOLTAGE (V) Gate Threshold vs. Temperature 1 –250 A 0.9 D 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 TEMPERATURE ( C) 3 Micrel R DS(ON) vs. Drain Current 500 1.8V 400 GS 300 2.5V GS 200 3.3V 100 GS 4. DRAIN CURRENT (A) R DS(ON) Variance vs. Temperature 1.3 1.2 1 =3.6V 0 =0.1A 0.7 -40 - 110 135 TEMPERATURE ( C) MIC94050/94051 ...

Page 4

... MIC94051 * Substrate must be connected to source Figure 2. Load Switch Application (with internal gate-source pull-up +4V MIC94050 Off MIC94050 Off Output Off Off 0V On Off +4V Off On Li Coin Cell On On don’t! Micrel July 2002 ...

Page 5

... No license is granted by implication or otherwise under any patent or patent right of Micrel, Inc. July 2002 1.40 (0.055) 2.50 (0.098 1.20 (0.047) 2.10 (0.083 DIMENSIONS: 1.12 (0.044) 0.81 (0.032 0.10 (0.004) 0.013 (0.0005) SOT-143 (M4 (408) 944-0970 FAX WEB © 2002 Micrel, Incorporated 5 MM (INCH) 0.150 (0.0059) 0.089 (0.0035) 0.41 (0.016) 0.13 (0.005) http://www.micrel.com MIC94050/94051 Micrel ...

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