ABLS-14.31818MHZ-20-B-T - MICROCHIP TECHNOLOGY

MIC94080/1/2/3/4/5

67mΩ RDSON 2A High Side Load Switch

in 0.85mm x 0.85mm Thin MLF® Package

MLF and MicroLeadFrame is a registered trademark of Amkor Technology, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

January 2011

M9999-013111-D

General Description

The MIC94080/1/2/3/4/5 is a family of high-side load switches

designed to operate from 1.7V to 5.5V input voltage. The load

switch pass element is an internal 67mΩ R

DSON P-Channel

MOSFET which enables the device to support up to 2A of

continuous current. Additionally, the load switch supports 1.5V

logic level control and shutdown features in a tiny 0.85mm x

0.85mm 4-pin Thin MLF® package.

The MIC94080 and MIC94081 feature rapid turn on. The

MIC94082 and MIC94083 provide a slew rate controlled soft-

start turn-on of 800µs, while the MIC94084 and MIC94085

provide a slew rate controlled soft-start turn-on of 120µs. The

soft-start feature is provided to prevent an in-rush current

event from pulling down the input supply voltage.

The MIC94081, MIC94083, and MIC94085 feature an active

load discharge circuit which switches in a 250Ω load when the

switch is disabled to automatically discharge a capacitive load.

An active pull-down on the enable input keeps the

MIC94080/1/2/3/4/5 in a default OFF state until the enable pin

is pulled above 1.25V. Internal level shift circuitry allows low

voltage logic signals to switch higher supply voltages. The

enable voltage can be as high as 5.5V and is not limited by

the input voltage.

The MIC94080/1/2/3/4/5 operating voltage range makes them

ideal for Lithium ion and NiMH/NiCad/Alkaline battery

powered systems, as well as non-battery powered

applications. The devices provide low quiescent current and

low shutdown current to maximize battery life.

Datasheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• 0.85mm x 0.85mm space saving 4-pin Thin MLF®

package

• 1.7V to 5.5V input voltage range

• 2A continuous operating current

• 67mΩ RDSON

• Internal level shift for CMOS/TTL control logic

• Ultra low quiescent current

• Micro-power shutdown current

• Soft-Start: MIC94082/3 (800µs), MIC94084/5 (120µs)

• Load discharge circuit: MIC94081, MIC94083,

MIC94085

• Ultra fast turn off time

• Junction operating temperature from -40ºC to +125ºC

Applications

• Cellular phones

• Portable Navigation Devices (PND)

• Personal Media Players (PMP)

• Ultra Mobile PCs

• Portable instrumentation

• Other Portable applications

• PDAs

• GPS Modules

• Industrial and DataComm equipment

____________________________________________________________________________________________________________________

Typical Application

Level Shift

and Slew

Rate

Control

Load

VIN

GND

VOUT

MIC94080 (ultra fast turn on)

MIC94082 (800µs soft-start)

MIC94084 (120µs soft-start)

Level Shift

Slew Rate

Control

Load

Discharge

Load

VIN

GND

VOUT

MIC94081 (ultra fast turn on with auto-discharge)

MIC94083 (800µs soft-start with auto-discharge)

MIC94085 (120µs soft-start with auto-discharge)

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 2 M9999-013111-D

Ordering Information

Part Number Part Marking Fast

Turn On Soft-Start Load

Discharge Package(1)

MIC94080YFT C1 • 4-Pin 0.85mm x 0.85mm Thin MLF®

MIC94081YFT C2 • • 4-Pin 0.85mm x 0.85mm Thin MLF®

MIC94082YFT C5 800µs 4-Pin 0.85mm x 0.85mm Thin MLF®

MIC94083YFT C7 800µs • 4-Pin 0.85mm x 0.85mm Thin MLF®

MIC94084YFT C0 120µs 4-Pin 0.85mm x 0.85mm Thin MLF®

MIC94085YFT 1C 120µs • 4-Pin 0.85mm x 0.85mm Thin MLF®

Notes:

1. Thin MLF® is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.

Pin Configuration

4-Pin (0.85mm x 0.85mm) Thin MLF®

(Top View)

Example Showing Orientation of Part Marking

(Bottom View)

Pin Description

Pin Number Pin Name Pin Function

1 VOUT Drain of P-Channel MOSFET.

2 GND Ground should be connected to electrical ground.

3 VIN Source of P-Channel MOSFET.

4 EN

Enable (Input): Active-high CMOS/TTL control input for switch. Internal ~2MΩ Pull down resistor.

Output will be off if this pin is left floating.

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 3 M9999-013111-D

Absolute Maximum Ratings(1)

Input Voltage (VIN)........................................................ +6V

Enable Voltage (VEN) ...................................................+6V

Continuous Drain Current (ID) (3)

A = 25°C .............................................................. ±2A

A = 85°C ........................................................... ±1.5A

Pulsed Drain Current (IDP)(4) ...................................... ±6.0A

Continuous Diode Current (IS)(5).............................. –50mA

Storage Temperature (Ts) ....................... –55°C to +150°C

ESD Rating – HBM(6).................................................... 3kV

Operating Ratings(2)

Input Voltage (VIN)....................................... +1.7 to +5.5V

Junction Temperature (TJ) .....................–40°C to +125°C

Package Thermal Resistance

0.85mm x 0.85mm Thin MLF®

(θJA) .......................................................140°C/W

(θJC) .........................................................85°C/W

Electrical Characteristics

TA = 25°C, bold values indicate –40°C< TA < +85°C, unless noted.

Symbol Parameter Condition Min Typ Max Units

VEN_TH Enable Threshold Voltage VIN = 1.7V to 4.5V, ID = –250µA 0.4 1.25 V

VIN = VEN = 5.5V, ID = OPEN

Measured on VIN MIC94080/1

0.1

IQ Quiescent Current

VIN = VEN = 5.5V, ID = OPEN

Measured on VIN MIC94082/3/4/5

µA

IEN Enable Input Current VIN = VEN = 5.5V, ID = OPEN 2.8 4 µA

ISHUT-Q Quiescent Current (shutdown) VIN = +5.5V, VEN = 0V, ID = OPEN

Measured on VIN(7)

0.02

1 µA

ISHUT-SWITCH OFF State Leakage Current VIN = +5.5V, VEN = 0V, ID = SHORT

Measured on VOUT, (7)

0.02

1 µA

VIN = +5.0V, ID = –100mA, VEN = 1.5V 67 115 mΩ

VIN = +4.5V, ID = –100mA, VEN = 1.5V 70 130 mΩ

VIN = +3.6V, ID = –100mA, VEN = 1.5V 80 165 mΩ

VIN = +2.5V, ID = –100mA, VEN = 1.5V 110 225 mΩ

VIN = +1.8V, ID = –100mA, VEN = 1.5V 175 350 mΩ

RDS(ON) P-Channel Drain to Source ON

Resistance

VIN = +1.7V, ID = –100mA, VEN = 1.5V 200 375 mΩ

RSHUTDOWN Turn-Off Resistance VIN = +3.6V, ITEST = 1mA, VEN = 0V

MIC94081/3/5

250

400 Ω

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating.

3. With thermal contact to PCB. See thermal considerations section.

4. Pulse width <300µs with < 2% duty cycle.

5. Continuous body diode current conduction (reverse conduction, i.e. VOUT to VIN) is not recommended.

6. Devices are ESD sensitive. Handling precautions recommended. HBM (Human body model), 1.5kΩ in series with 100pF.

7. Measured on the MIC94080YFT.

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 4 M9999-013111-D

Electrical Characteristics (Dynamic)

TA = 25°C, bold values indicate –40°C< TA < +85°C, unless noted.

Symbol Parameter Condition Min Typ Max Units

VIN = +3.6V, ID = –100mA, VEN = 1.5V

MIC94080, MIC94081

0.40 1.5 µs

VIN = +3.6V, ID = –100mA, VEN = 1.5V

MIC94082, MIC94083

200 600 1500 µs

tON_DLY Turn-On Delay Time

VIN = +3.6V, ID = –100mA, VEN = 1.5V

MIC94084, MIC94085

65 110 165 µs

VIN = +3.6V, ID = –100mA, VEN = 1.5V

MIC94080, MIC94081

0.4 1.5 µs

VIN = +3.6V, ID = –100mA, VEN = 1.5V

MIC94082, MIC94083

400 800 1500 µs

tON_RISE Turn-On Rise Time

VIN = +3.6V, ID = –100mA, VEN = 1.5V

MIC94084, MIC94085

65 120 175 µs

tOFF_DLY Turn-Off Delay Time VIN = +3.6V, ID = –100mA, VEN = 0V 60 200 ns

tOFF_FALL Turn-Off Fall Time VIN = +3.6V, ID = –100mA, VEN = 0V 20 100 ns

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 5 M9999-013111-D

Typical Characteristics

MIC94080/1/2/3/4/5

MIC94080/1

MIC94082/83/84/85

MIC94080/81

MIC94082/3/4/5

MIC94081/2/3/4/5

MIC94080/1

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 6 M9999-013111-D

Typical Characteristics

MIC94082/3

MIC94080/1

MIC94082/3

MIC94084/5

MIC94080/1/2/3/4/5

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 7 M9999-013111-D

Functional Characteristics

MIC94080

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 8 M9999-013111-D

MIC94081

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 9 M9999-013111-D

MIC94082

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 10 M9999-013111-D

MIC94083

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 11 M9999-013111-D

MIC94084

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 12 M9999-013111-D

MIC94085

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 13 M9999-013111-D

Application Information

Power Switch SOA

The safe operating area (SOA) curve represents the

boundary of maximum safe operating current and

maximum safe operating junction temperature.

Figure 1. SOA Graph

The curves above show the SOA for various VIN’s

mounted on a typical 1 layer, 1 square inch copper

board.

Power Dissipation Considerations

As with all power switches, the current rating of the

switch is limited mostly by the thermal properties of the

package and the PCB it is mounted on. There is a

simple ohms law type relationship between thermal

resistance, power dissipation and temperature, which

are analogous to an electrical circuit:

Figure 2. Simple Electrical Circuit

From this simple circuit we can calculate Vx if we know

Isource, Vz and the resistor values, Rxy and Ryz using

the equation:

()

VzRyzRxyIsourceVx ++⋅=

Thermal circuits can be considered using these same

rules and can be drawn similarly by replacing current

sources with power dissipation (in Watts), resistance

with thermal resistance (in ºC/W) and voltage sources

with temperature (in ºC).

Figure 3. Simple Thermal Circuit

Now replacing the variables in the equation for Vx, we

can find the junction temperature (TJ) from power

dissipation, ambient temperature and the known thermal

resistance of the PCB (RθCA) and the package (RθJC).

J = PDISS x (RθJC + RθCA) + TA

PDISS is calculated as ISWITCH

2 x RSWmax. RθJC is found in

the operating ratings section of the datasheet and RθCA

(the PCB thermal resistance) values for various PCB

copper areas is discussed in the document “Designing

with Low Dropout Voltage Regulators” available from the

Micrel website (LDO Application Hints).

Example:

A switch is intended to drive a 1A load and is placed on

a printed circuit board which has a ground plane area of

at least 25mm by 25mm (625mm2). The Voltage source

is a Li-ion battery with a lower operating threshold of 3V

and the ambient temperature of the assembly can be up

to 50ºC.

Summary of variables:

ISW = 1A

VIN = 3V to 4.2V

TA = 50oC

RθJC = 85ºC/W

RθCA = 53ºC/W Read from Graph in Figure 4

Figure 4. Excerpt from the LDO Book

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 14 M9999-013111-D

PDISS = ISW

2 x RSWmax

The worst case switch resistance (RSWmax) at the lowest

VIN of 3V is not available in the datasheet, so the next

lower value of VIN is used.

RSWmax @ 2.5v = 200mΩ

If this were a figure for worst case RSWmax for 25ºC, an

additional consideration is to allow for the maximum

junction temperature of 125ºC, the actual worst case

resistance in this case can be 30% higher (See RDSON

variance vs. temperature graph). However, 200mΩ is the

maximum over temperature.

Therefore:

TJ = 12 x 0.2 x (85+53) + 50

TJ = 78ºC

This is below the maximum 125ºC.

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 15 M9999-013111-D

Package Information

4-Pin (0.85mm x 0.85mm) Thin MLF® (FT)

Micrel, Inc. MIC94080/1/2/3/4/5

January 2011 16 M9999-013111-D

Recommended Land Pattern

4-Pin (0.85mm x 0.85mm) Thin MLF® (FT)

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

Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This

information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,

specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual

property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability

whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties

relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.

Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product

can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant

into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A

Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully

indemnify Micrel for any damages resulting from such use or sale.