MIC5018YM4 Micrel Semiconductor, MIC5018YM4 Datasheet

MIC5018YM4

Manufacturer Part Number

MIC5018YM4

Description

Manufacturer

Micrel Semiconductor

Datasheet

1.MIC5018YM4.pdf (8 pages)

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General Description

The MIC5018 IttyBitty™ high-side MOSFET driver is

designed to switch an N-channel enhancement-type

MOSFET from a TTL compatible control signal in high- or

low-side switch applications. This driver features the tiny

4-lead SOT-143 package.

The MIC5018 is powered from a +2.7V to +9V supply

and features extremely low off-state supply current.

An internal charge pump drives the gate output higher

than the driver supply voltage and can sustain the gate

voltage indefinitely. An internal zener diode limits the

gate-to-source voltage to a safe level for standard

N-channel MOSFETs.

In high-side configurations, the source voltage of the

MOSFET approaches the supply voltage when switched

on. To keep the MOSFET turned on, the MIC5018’s output

drives the MOSFET gate voltage higher than the supply

voltage. In a typical high-side configuration, the driver is

powered from the load supply voltage. Under some

conditions, the MIC5018 and MOSFET can switch a load

voltage that is slightly higher than the driver supply

voltage.

In a low-side configuration, the driver can control a

MOSFET that switches any voltage up to the rating of the

MOSFET. The gate output voltage is higher than the

typical 3.3V or 5V logic supply and can fully enhance a

standard MOSFET.

The MIC5018 is available in the SOT-143 package and is

rated for –40°C to +85°C ambient temperature range.

Typical Applications

IttyBitty is a trademark of Micrel, Inc.

April 2006

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

Low-Voltage High-Side Power Switch

4.7µF

Off

* International Rectifier

100m , 17A max.

TO-220 package

V S

C T L

MIC5018

GND

+5V

IRFZ24*

N-Channel

MO S F E T

Features

• +2.7V to +9V operation

• 150µA typical supply current at 5V supply

• ≤1µA typical standby (off) current

• Charge pump for high-side low-voltage applications

• Internal zener diode gate-to-ground MOSFET protection

• Operates in low- and high-side configurations

• TTL compatible input

• ESD protected

Applications

• Battery conservation

• Power bus switching

• Solenoid and motion control

• Lamp control

408

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

IttyBitty

4.7µF

Off

‡

* Siliconix

+2.7 to +9V

Load voltage limited only by

MOSFET drain-to-source rating

30m , 7A max., 30V V

8-lead SOIC package

™

Low-Side Power Switch

High-Side MOSFET Driver

V S

C T L

MIC5018

GND

max.

L O AD SU PPL Y

Si9410DY*

N-channel

MO S F E T

‡

(408) 955-1690

M9999-042406

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MIC5018YM4 Summary of contents

Page 1

General Description The MIC5018 IttyBitty™ high-side MOSFET driver is designed to switch an N-channel enhancement-type MOSFET from a TTL compatible control signal in high- or low-side switch applications. This driver features the tiny 4-lead SOT-143 package. The MIC5018 is powered ...

Page 2

... Micrel, Inc. Ordering Information Part Number Standard Pb-Free MIC5018BM4 MIC5018YM4 Pin Configuration Early production identification: MH10 Pin Description Pin Number Pin Name Pin Function 1 GND Ground: Power return Supply (Input): +2.7V to +9V supply Gate (Output): Gate connection to external MOSFET. Control (Input): TTL compatible on/off control input. Logic high drives the gate output above the supply ...

Page 3

Micrel, Inc. Absolute Maximum Ratings Supply Input Voltage (V ) .....................................+10V SUPPLY Control Voltage (V ) ................................... –0.6V to +16V CTL Gate Voltage (V ).........................................................+16V G Ambient Temperature Range (T )...............–40°C to +85°C A Electrical Characteristics Parameter Supply Current Control ...

Page 4

Micrel, Inc. (4) Typical Characteristics Supply Current vs. Supply Voltage 1.0 0.8 -40°C 0.6 25°C 0.4 0.2 125° SUPPLY VOLTAGE (V) Gate Output Voltage vs. Supply Voltage 20 125°C 15 25°C -40° ...

Page 5

Micrel, Inc. Functional Diagram Off D1 16V Functional Description Refer to the functional diagram. The MIC5018 is a noninverting device. Applying a logic high signal to CTL (control input) produces gate drive ...

Page 6

Micrel, Inc. Application Information Supply Bypass A capacitor from VS to GND is recommended to control switching and supply transients. Load current and supply lead length are some of the factors that affect capacitor size requirements. A 4.7µF or 10µF ...

Page 7

Micrel, Inc. supply voltage is used. An external zener diode can clamp the gate-to-source voltage as shown in Figure 4. The zener voltage, plus its tolerance, must not exceed the absolute maximum gate voltage of the MOSFET. MIC5018 2 3 ...

Page 8

Micrel, Inc. Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. ...

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