MIC94030/94031

TinyFET

TinyFET is a registered trademark of Micrel, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

July 2006

M9999-071106

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 0.75Ω at 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

connection separate from the source connection. This 4-

dissipation) and makes analog switch applications

practical.

MIC94030/1 the ideal choice for PCMCIA card sleep mode

or distributed power management applications.

Features

• 13.5V minimum drain-to-source breakdown

• 0.75Ω typical on-resistance

– at 4.5V gate-to-source voltage

• 0.45Ω typical 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

Standard

Marking

Pb-Free

Marking

Junction Temp. Range

Package

MIC94030BM4

P30

MIC94030YM4

P30

–55° to +150°C

SOT-143

MIC94031BM4

P31

MIC94031YM4

P31

–55° to +150°C

SOT-143

Pin Configuration

Substrate

Source

Gate

Drain

P3x

Part

Identification

P3x

SOT-143 (M4)

Typical PCB Layout

S

D

G

SS

PCB heat sink

plane improves

heat dissipation

PCB traces