MIC5015YN - MICROCHIP TECHNOLOGY - Datasheet.Directory

MIC5014/5015 Micrel, Inc.

June 2005 1 MIC5014/5015

Features

•2.75V to 30V operation

•100µA maximum supply current (5V supply)

•15µA typical off-state current

•Internal charge pump

•TTL compatible input

•Withstands 60V transient (load dump)

•Reverse battery protected to –20V

•Inductive spike protected to –20V

•Overvoltage shutdown at 35V

•Internal 15V gate protection

•Minimum external parts

•Operates in high-side or low-side configurations

•1µA control input pull-off

•Inverting and noninverting versions

Applications

•Automotive electrical load control

•Battery-powered computer power management

•Lamp control

•Heater control

•Motor control

•Power bus switching

General Description

MIC5014 and MIC5015 MOSFET drivers are designed for

gate control of N-channel, enhancement-mode, power

MOSFETs used as high-side or low-side switches.

The MIC5014/5 can sustain an on-state output indefinitely.

The MIC5014/5 operates from a 2.75V to 30V supply. In high-

side configurations, the driver can control MOSFETs that

switch loads of up to 30V. In low-side configurations, with

separate supplies, the maximum switched voltage is limited

only by the MOSFET.

The MIC5014/5 has a TTL compatible control input.

The MIC5014 is noninverting while the MIC5015 is inverting.

The MIC5014/5 features an internal charge pump that can

sustain a gate voltage greater than the available supply

voltage. The driver is capable of turning on a logic-level

MOSFET from a 2.75V supply or a standard MOSFET from a

5V supply. The gate-to-source output voltage is internally

limited to approximately 15V.

The MIC5014/5 is protected against automotive load dump,

reversed battery, and inductive load spikes of –20V.

The driver’s overvoltage shutdown feature turns off the exter-

nal MOSFET at approximately 35V to protect the load against

power supply excursions.

The MIC5014 is an improved pin-for-pin compatible replace-

ment in many MIC5011 applications.

The MIC5014/5 is available in plastic 8-pin DIP and 8-pin

SOIC pacakges.

MIC5014/5015

Low-Cost High- or Low-Side MOSFET Driver

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

Load

MIC5014

Control Input

OFF

5IRLZ24

+3V to +4V

GateGnd

Source

Input

V+

10µF

Figure 1. 3V “Sleep-Mode” Switch

with a Logic-Level MOSFET

Typical Application

MIC5014/5015 Micrel, Inc.

MIC5014/5015 2June 2005

Block Diagram

Charge Pump

V+ (1)

*Input (2)

Ground (4)

Source (3)

Gate (5)

15V

* Only on the inverting version

Pin Description

Pin Number Pin Name Pin Function

1V+Supply. Must be decoupled to isolate from large transients caused by the

power MOSFET drain. 10µF is recommended close to pins 1 and 4.

2Input Turns on power MOSFET when taken above (or below) threshold (1.0V

typical). Pin 2 requires ~ 1µA to switch.

3Source Connects to source lead of power MOSFET and is the return for the gate

clamp zener. Pin 3 can safely swing to –20V when turning off inductive

loads.

4Ground

5Gate Drives and clamps the gate of the power MOSFET.

6, 7, 8 NC Not internally connected.

Ordering Information

Part Number Temperature

Standard Pb-Free Range Configuration Package

MIC5014BM MIC5014YM –40ºC to +85ºC Non-Inverting 8-Pin SOIC

MIC5014BN MIC5014YN –40ºC to +85ºC Non-Inverting 8-Pin PDIP

MIC5015BM MIC5015YM –40ºC to +85ºC Inverting 8-Pin SOIC

MIC5015BN MIC5015YN –40ºC to +85ºC Inverting 8-Pin PDIP

MIC5014/5015 Micrel, Inc.

June 2005 3 MIC5014/5015

Absolute Maximum Ratings (Notes 1,2) Operating Ratings (Notes 1,2)

Electrical Characteristics (Note 3) TA = –40°C to +85°C unless otherwise specified

Supply Voltage ............................................... –20V to 60V

Input Voltage .....................................................–20V to V+

Source Voltage..................................................–20V to V+

Source Current .......................................................... 50mA

Gate Voltage .................................................. –20V to 50V

Junction Temperature .............................................. 150°C

θJA (Plastic DIP) ..................................................... 160°C/W

θJA (SOIC) ............................................................. 170°C/W

Ambient Temperature: ................................ –40°C to +85°C

Storage Temperature ................................ –65°C to +150°C

Lead Temperature...................................................... 260°C

(max soldering time: 10 seconds)

Supply Voltage (V+)......................................... 2.75V to 30V

Parameter Conditions Min Typ Max Units

Supply Current V+ = 30V VIN De-Asserted (Note 5) 10 25 µA

VIN Asserted (Note 5) 5.0 10 mA

V+ = 5V VIN De-Asserted 10 25 µA

VIN Asserted 60 100

V+ = 3V VIN De-Asserted 10 25 µA

VIN Asserted 25 35

Logic Input Voltage Threshold 3.0V ≤ V+ ≤ 30V Digital Low Level 0.8

VIN TA = 25°CDigital High Level 2.0 V

Logic Input Current 3.0V ≤ V+ ≤ 30V VIN Low –2.0 0 µA

MIC5014 (non-inverting) VIN High 1.0 2.0

Logic Input Current 3.0V ≤ V+ ≤ 30V VIN Low –2.0 –1.0 µA

MIC5015 (inverting) VIN High –1.0 2.0

Input Capacitance 5.0 pF

Gate Enhancement 3.0V ≤ V+ ≤ 30V VIN Asserted 4.0 17 V

VGATE – VSUPPLY

Zener Clamp 8.0V ≤ V+ ≤ 30V VIN Asserted 13 15 17 V

VGATE – VSOURCE

Gate Turn-on Time, tON V+ = 4.5V VIN switched on, measure 2.5 8.0 ms

(Note 4) CL = 1000pF time for VGATE to reach V+ + 4V

V+ = 12V As above, measure time for 90 140 µs

CL = 1000pF VGATE to reach V+ + 4V

Gate Turn-off Time, tOFF V+ = 4.5V VIN switched off, measure 6.0 30 µs

(Note 4) CL = 1000pF time for VGATE to reach 1V

V+ = 12V As above, measure time for 6.0 30 µs

CL = 1000pF VGATE to reach 1V

Overvoltage Shutdown 35 37 41 V

Threshold

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply

when operating the device beyond its specified Operating Ratings.

Note 2: The MIC5014/5015 is ESD sensitive.

Note 3: Minimum and maximum Electrical Characteristics are 100% tested at TA = 25°C and TA = 85°C, and 100% guaranteed over the

entire operating temperature range. Typicals are characterized at 25°C and represent the most likely parametric norm.

Note 4: Test conditions reflect worst case high-side driver performance. Low-side and bootstrapped topologies are significantly faster—see

Applications Information.

Note 5: “Asserted” refers to a logic high on the MIC5014 and a logic low on the MIC5015.

MIC5014/5015 Micrel, Inc.

MIC5014/5015 4June 2005

Typical Characteristics All data measured using FET probe to minimize resistive loading

051015 20 25 30

SUPPLY CURRENT (mA)

SUPPLY VOLTAGE (V)

Supply Current

(Output Asserted)

051015 20 25 30

GATE ENHANCEMENT (V)

SUPPLY VOLTAGE (V)

Gate Enhancement

vs. Supply Voltage

Gate Enhancement =

VGATE – VSUPPLY

100

150

200

250

300

0246810

TURN-ON TIME (µs)

GATE CAPACITANCE (nF)

High-Side Turn-On Time

vs. Gate Capacitance

Supply = 12V

0.01

0.1

100

0481216 20 24 28

TURN-ON TIME (ms)

SUPPLY VOLTAGE (V)

High-Side Turn-On Time

Until Gate = Supply + 4V

CGATE = 1300pF

0.01

0.1

100

0481216202428

TURN-ON TIME (ms)

SUPPLY VOLTAGE (V)

High-Side Turn-On Time

Until Gate = Supply + 4V

GATE

= 3000pF

100

120

140

160

180

-60 -30 0 30 60 90 120 150

HIGH-SIDE TURN-ON TIME (µs)

AMBIENT TEMPERATURE (°C)

High-Side Turn-On Time

vs. Temperature

Supply = 12V

GATE

= 1000pF

0.01

0.1

100

051015 20 25 30

TURN-ON TIME (ms)

SUPPLY VOLTAGE (V)

High-Side Turn-On Time

Until Gate = Supply + 10V

GATE

= 1300pF

0.01

0.1

100

051015 20 25 30

TURN-ON TIME (ms)

SUPPLY VOLTAGE (V)

High-Side Turn-On Time

Until Gate = Supply + 10V

CGATE = 3000pF

051015 20 25 30

TURN-OFF TIME (µs)

SUPPLY VOLTAGE (V)

High-Side Turn-Off Time

Until Gate = 1V

CGATE = 3000pF

CGATE =

1300pF

100

1000

051015

OUTPUT CURRENT (µA)

GATE-TO-SOURCE VOLTAGE (V)

Charge-Pump

Output Current

Source connected

to supply: supply

voltage as noted

12V

28V

100

1000

10000

051015

OUTPUT CURRENT (µA)

GATE-TO-SOURCE VOLTAGE (V)

Charge-Pump

Output Current

Source connected

to ground: supply

voltage as noted

12V

28V

100

1000

10000

051015 20 25 30

TURN-ON TIME (µs)

SUPPLY VOLTAGE (V)

Low-Side Turn-On Time

Until Gate = 4V

CGATE = 3000pF

CGATE = 1300pF

MIC5014/5015 Micrel, Inc.

June 2005 5 MIC5014/5015

Load

MIC5014

Control Input

OFF

+3V to +30V

GateGnd

Source

Input

V+

10µF

Figure 2. Low Side Driver

not use a socket for the MOSFET. If the MOSFET is a TO-220

type package, make high current connections to the drain tab.

Wiring losses have a profound effect on high-current circuits.

A floating milliohmeter can identify connections that are con-

tributing excess drop under load.

Low Voltage Testing

As the MIC5014/MIC5015 have relatively high output imped-

ances, a normal oscilloscope probe will load the device. This

is especially pronounced at low voltage operation. It is recom-

mended that a FET probe or unity gain buffer be used for all

testing.

Circuit Topologies

The MIC5014 and MIC5015 are well suited for use with

standard power MOSFETs in both low and high side driver

configurations. In addition, the lowered supply voltage re-

quirements of these devices make them ideal for use with logic

level FETs in high side applications with a supply voltage of 3

to 4V. (If higher supply voltages [>4V] are used with logic level

FETs, an external zener clamp must be supplied to ensure

that the maximum VGS rating of the logic FET [10V] is not

exceeded.) In addition, a standard IGBT can be driven using

these devices.

Choice of one topology over another is usually based on

speed vs. safety. The fastest topology is the low side driver,

however, it is not usually considered as safe as high side

driving as it is easier to accidentally short a load to ground than

to VCC. The slowest, but safest topology is the high side

driver; with speed being inversely proportional to supply

voltage. It is the preferred topology for most military and

automotive applications. Speed can be improved consider-

ably by bootstrapping from the supply.

All topologies implemented using these devices are well

suited to driving inductive loads, as either the gate or the

source pin can be pulled 20V below ground with no effect.

External clamp diodes are unnecessary, except for the case

in which a transient may exceed the overvoltage trip point.

High Side Driver (Figure 1) The high side topology shown

here is an implementation of a “sleep-mode” switch for a

laptop or notebook computer which uses a logic level FET. A

standard power FET can easily be substituted when supply

voltages above 4V are required.

Applications Information

Functional Description

The MIC5014 is functionally and pin for pin compatible with

the MIC5011, except for the omission of the optional speed-

up capacitor pins, which are available on the MIC5011. The

MIC5015 is an inverting configuration of the MIC5014.

The internal functions of these devices are controlled via a

logic block (refer to block diagram) connected to the control

input (pin 2). When the input is off (low for the MIC5014, and

high for the MIC5015), all functions are turned off, and the

gate of the external power MOSFET is held low via two N-

channel switches. This results in a very low standby current;

15µA typical, which is necessary to power an internal bandgap.

When the input is driven to the “ON” state, the N-channel

switches are turned off, the charge pump is turned on, and the

P-channel switch between the charge pump and the gate

turns on, allowing the gate of the power FET to be charged.

The op amp and internal zener form an active regulator which

shuts off the charge pump when the gate voltage is high

enough. This is a feature not found on the MIC5011.

The charge pump incorporates a 100kHz oscillator and on-

chip pump capacitors capable of charging a 1,000pF load in

90µs typical. In addition to providing active regulation, the

internal 15V zener is included to prevent exceeding the VGS

rating of the power MOSFET at high supply voltages.

The MIC5014/15 devices have been improved for greater

ruggedness and durability. All pins can withstand being

pulled 20V below ground without sustaining damage, and the

supply pin can withstand an overvoltage transient of 60V for

1s. An overvoltage shutdown has also been included, which

turns off the device when the supply exceeds 35V.

Construction Hints

High current pulse circuits demand equipment and assembly

techniques that are more stringent than normal, low current

lab practices. The following are the sources of pitfalls most

often encountered during prototyping: Supplies : Many bench

power supplies have poor transient response. Circuits that

are being pulse tested, or those that operate by pulse-width

modulation will produce strange results when used with a

supply that has poor ripple rejection, or a peaked transient

response. Always monitor the power supply voltage that

appears at the drain of a high side driver (or the supply side

of the load for a low side driver) with an oscilloscope. It is not

uncommon to find bench power supplies in the 1kW class that

overshoot or undershoot by as much as 50% when pulse

loaded. Not only will the load current and voltage measure-

ments be affected, but it is possible to overstress various

components, especially electrolytic capacitors, with possibly

catastrophic results. A 10µF supply bypass capacitor at the

chip is recommended. Residual resistances: Resistances

in circuit connections may also cause confusing results. For

example, a circuit may employ a 50mΩ power MOSFET for

low voltage drop, but unless careful construction techniques

are used, one could easily add 50 to 100mΩ resistance. Do

MIC5014/5015 Micrel, Inc.

MIC5014/5015 6June 2005

the short is removed, feedback to the input pin insures that the

MIC5014 will turn back on. This output can also be level

shifted and sent to an I/O port of a microcontroller for intelli-

gent control.

Current Shunts (RS). Low valued resistors are necessary for

use at RS. Resistors are available with values ranging from 1

to 50mΩ, at 2 to 10W. If a precise overcurrent trip point is

not necessary, then a nonprecision resistor or even a mea-

sured PCB trace can serve as RS. The major cause of drift in

resistor values with such resistors is temperature coefficient;

the designer should be aware that a linear, 500 ppm/°C

change will contribute as much as 10% shift in the overcurrent

trip point. If this is not acceptable, a power resistor designed

for current shunt service (drifts less than 100 ppm/°C), or a

Kelvin-sensed resistor may be used.†

† Suppliers of Precision Power Resistors:

Dale Electronics, Inc., 2064 12th Ave., Columbus, NE 68601. (402) 565-

3131

International Resistive Co., P.O. Box 1860, Boone,NC 28607-1860.

(704) 264-8861

Isotek Corp., 566 Wilbur Ave. Swansea, MA 02777. (508) 673-2900

Kelvin, 14724 Ventura Blvd., Ste. 1003, Sherman Oaks, CA 91403-3501.

(818) 990-1192

RCD Components, Inc., 520 E. Industrial Pk. Dr., Manchester, NH 03103.

(603) 669-0054

Ultronix, Inc., P.O. Box 1090, Grand Junction, CO 81502 (303) 242-0810

High Side Driver With Delayed Current Sense (Figure 5)

Delay of the overcurrent detection to accomodate high inrush

loads such as incandescent or halogen lamps can be accom-

plished by adding an LM3905 timer as a one shot to provide

an open collector pulldown for the comparator output such

that the control input of the MIC5015 stays low for a preset

amount of time without interference from the current sense

circuitry. Note that an MIC5015 must be used in this applica-

tion (figure 5), as an inverting control input is necessary. The

delay time is set by the RC time constant of the external

components on pins 3 and 4 of the timer; in this case, 6ms was

chosen.

An LM3905 timer was used instead of a 555 as it provides a

clean transition, and is almost impossible to make oscillate.

Good bypassing and noise immunity is essential in this circuit

to prevent spurious op amp oscillations.

Low Side Driver (Figure 2) A key advantage of this topology,

as previously mentioned, is speed. The MOSFET gate is

driven to near supply immediately when the MIC5014/15 is

turned on. Typical circuits reach full enhancement in 50µs or

less with a 15V supply.

Bootstrapped High Side Driver (Figure 3) The turn-on time of

a high side driver can be improved to faster than 40µs by

bootstrapping the supply with the MOSFET source. The

Schottky barrier diode prevents the supply pin from dropping

more than 200mV below the drain supply and improves turn-

on time. Since the supply current in the “off” state is only a

small leakage, the 100nF bypass capacitor tends to remain

charged for several seconds after the MIC5014/15 is turned

off. Faster speeds can be obtained at the expense of supply

voltage (the overvoltage shutdown will turn the part off when

the bootstrapping action pulls the supply pin above 35V) by

using a larger capacitor at the junction of the two 1N4001

diodes. In a PWM application (this circuit can be used for either

PWM’ed or continuously energized loads), the chip supply is

sustained at a higher potential than the system supply, which

improves switching time.

Figure 3. Bootstrapped Hgh-Side Driver

High Side Driver With Current Sense (Figure 4) Although no

current sense function is included on the MIC5014/15 devices,

a simple current sense function can be realized via the addition

of one more active component; an LM301A op amp used as

a comparator. The positive rail of the op amp is tied to V+, and

the negative rail is tied to ground. This op amp was chosen as

it can withstand having input transients that swing below the

negative rail, and has common mode range almost to the

positive rail.

The inverting side of this comparator is tied to a voltage divider

which sets the voltage to V+ – VTRIP . The non inverting side

is tied to the node between the drain of the FET and the sense

resistor. If the overcurrent trip point is not exceeded , this node

will always be pulled above V+ – VTRIP, and the output of the

comparator will be high which feeds the control input of the

MIC5014 (polarities should be reversed if the MIC5015 is

used). One the overcurrent trip point has been reached, the

comparator will go low, which shuts off the MIC5014. When the

Load

MIC5014

GateGnd

Source

Input

V+

10µF

1kΩ

0.06Ω

12V

1kΩ

120kΩ

LM301A

2.2kΩ

ITRIP = VTRIP/RS

= 1.7A

VTRIP = R1/(R1+R2)

Load

MIC5015

Control Input

OFF

+2.75V to +30V

GateGnd

Source

Input

V+

1µF

100nF

1N4001 (2)

1N5817

1RF540

Figure 4. High Side Driver with Overcurrent Shutdown

MIC5014/5015 Micrel, Inc.

June 2005 7 MIC5014/5015

Typical Applications

Variable Supply Low Side Driver for Motor Speed Control

(Figure 6) The internal regulation in the MIC5014/15 allows

a steady gate enhancement to be supplied while the

MIC5014/15 supply varies from 5V to 30V, without damaging

the internal gate to source zener clamp. This allows the speed

of the DC motor shown to be varied by varying the supply

voltage.

Figure 6: DC Motor Speed Control/Driver

Solenoid Valve Driver (Figure 7) High power solenoid valves

are used in many industrial applications requiring the timed

dispensing of chemicals or gases. When the solenoid is

activated, the valve opens (or closes), releasing (or stopping)

fluid flow. A solenoid valve, like all inductive loads, has a

considerable “kickback” voltage when turned off, as current

cannot change instantaneously through an inductor. In most

applications, it is acceptable to allow this voltage to momen-

tarily turn the MOSFET back on as a way of dissipating the

inductor’s current. However, if this occurs when driving a

solenoid valve with a fast switching speed, chemicals or

gases may be inadvertantly be dispensed at the wrong time

with possibly disasterous consequences. Also, too large of

a kickback voltage (as is found in larger solenoids) can

damage the MIC5014 or the power FET by forcing the Source

node below ground (the MIC5014 can be driven up to 20V

below ground before this happens). A catch diode has been

included in this design to provide an alternate route for the

inductive kickback current to flow. The 5kΩ resistor in series

with this diode has been included to set the recovery time of

the solenoid valve.

Figure 7: Solenoid Valve Driver

MIC5014

OFF

5IRF540

= +5V to +30V

GateGnd

Source

Input

V+

MIC5015

OFF

5IRFZ40

24V

GateGnd

Source

Input

V+

5kΩ

1N4005

ASCO

8320A

Solenoid

Figure 5. High Side Driver with Delayed Overcurrent Shutdown

Load

MIC5014

GateGnd

Source

Input

V+

10µF

1kΩ

0.06Ω

12V

1kΩ

120kΩLM301A

2.2kΩ

0.01µF

LM3905N

Logic

V+Gnd

R/C

REF

Trigger

Emit

Coll

12V

1000pF

1kΩ

MIC5014/5015 Micrel, Inc.

MIC5014/5015 8June 2005

Motor Driver With Stall Shutdown (Figure 10) Tachometer

feedback can be used to shut down a motor driver circuit when

a stall condition occurs. The control switch is a 3-way type; the

“START” position is momentary and forces the driver ON.

When released, the switch returns to the “RUN” position, and

the tachometer’s output is used to hold the MIC5014 input ON.

If the motor slows down, the tach output is reduced, and the

MIC5014 switches OFF. Resistor “R” sets the shutdown

threshold.

Figure 10. Motor Stall Shutdowm

Simple DC-DC Converter (Figure 11) The simplest applica-

tion for the MIC5014 is as a basic one-chip DC-DC converter.

As the output (Gate) pin has a relatively high impedance, the

output voltage shown will vary significantly with applied load.

Incandescent/Halogen Lamp Driver (Figure 8) The combi-

nation of an MIC5014/5015 and a power FET makes an

effective driver for a standard incandescent or halogen lamp

load. Such loads often have high inrush currents, as the

resistance of a cold filament is less than one-tenth as much as

when it is hot. Power MOSFETs are well suited to this

application as they have wider safe operating areas than do

power bipolar transistors. It is important to check the SOA

curve on the data sheet of the power FET to be used against

the estimated or measured inrush current of the lamp in

question prior to prototyping to prevent “explosive” results.

If overcurrent sense is to be used, first measure the duration

of the inrush, then use the topology of Figure 5 with the RC of

the timer chosen to accomodate the duration with suitable

guardbanding.

Figure 8. Halogen Lamp Driver

Relay Driver (Figure 9) Some power relay applications re-

quire the use of a separate switch or drive control, such as in

the case of microprocessor control of banks of relays where

a logic level control signal is used, or for drive of relays with

high power requirements. The combination of an MIC5014/

5015 and a power FET also provides an elegant solution to

power relay drive.

Figure 9: Relay Driver

MIC5014

Control Input

OFF

5IRF540

12V

GateGnd

Source

Input

V+

10µF

OSRAM

HLX64623

MIC5014

Control Input

OFF

5IRF540

12V

GateGnd

Source

Input

V+

10µF

Guardian Electric

1725-1C-12D

MIC5014

5IRFZ44

12V

GateGnd

Source

Input

V+

10µF

330kΩ

1N4148

Figure 11. DC - DC Converter

MIC5014

GateGnd

Source

Input

V+

10µF

OUT

= 12V

MIC5014/5015 Micrel, Inc.

June 2005 9 MIC5014/5015

High Side Driver With Load Protection (Figure 12) Al-

though the MIC5014/15 devices are reverse battery pro-

tected, the load and power FET are not, in a typical high side

configuration. In the event of a reverse battery condition, the

internal body diode of the power FET will be forward biased.

This allows the reversed supply access to the load.

Push-Pull Driver With No Cross-Conduction (Figure 13)

As the turn-off time of the MIC5014/15 devices is much faster

than the turn-on time, a simple push-pull driver with no cross

conduction can be made using one MIC5014 and one

MIC5015. The same control signal is applied to both inputs;

the MIC5014 turns on with the positive signal, and the

MIC5015 turns on when it swings low.

This scheme works with no additional components as the

relative time difference between the rise and fall times of the

MIC5014 is large. However, this does mean that there is

Figure 13: Push-Pull Driver

The addition of a Schottky diode between the supply and the

FET eliminates this problem. The MBR2035CT was chosen

as it can withstand 20A continuous and 150A peak,

and should survive the rigors of an automotive environment.

The two diodes are paralleled to reduce switch loss (forward

voltage drop).

Figure 12: High Side Driver WIth Load Protection

considerable deadtime (time when neither driver is turned on).

If this circuit is used to drive an inductive load, catch diodes

must be used on each half to provide an alternate path for the

kickback current that will flow during this deadtime.

This circuit is also a simple half H-bridge which can be driven

with a PWM signal on the input for SMPS or motor drive

applications in which high switching frequencies are not

desired.

Load

MIC5014

Control Input

OFF

5IRF540

12V

GateGnd

Source

Input

V+

10µF MBR2035CT

MIC5014

Control Input

5IRFZ40

12V

GateGnd

Source

Input

V+

10µF

MIC5015

GateGnd

Source

Input

V+

12V

IRFZ40

OUT

MIC5014/5015 Micrel, Inc.

MIC5014/5015 10 June 2005

Package Information

0.380 (9.65)

0.370 (9.40)

0.135 (3.43)

0.125 (3.18)

PIN 1

DIMENSIONS:

INCH (MM)

0.018 (0.57)

0.100 (2.54)

0.013 (0.330)



0.010 (0.254)

0.300 (7.62)

0.255 (6.48)

0.245 (6.22)

0.380 (9.65)

0.320 (8.13)



0.0375 (0.952)

0.130 (3.30)

8-Pin Plastic DIP (N)

45°

0°–8°

0.244 (6.20)

0.228 (5.79)

0.197 (5.0)

0.189 (4.8) SEATING

PLANE

0.026 (0.65)

MAX)

0.010 (0.25)



0.007 (0.18)

0.064 (1.63)

0.045 (1.14)

0.0098 (0.249)

0.0040 (0.102)

0.020 (0.51)

0.013 (0.33)

0.157 (3.99)

0.150 (3.81)

0.050 (1.27)

TYP

PIN 1

DIMENSIONS:

INCHES (MM)

0.050 (1.27)

0.016 (0.40)

8-Pin SOP (M)

MIC5014/5015 Micrel, Inc.

June 2005 11 MIC5014/5015

MIC5014/5015 Micrel, Inc.

MIC5014/5015 12 June 2005

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

This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use.

Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.

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.