LTC4440EMS8E-5#TR_技术文档

LTC4440

High Speed, High Voltage

High Side Gate Driver

FeaTures

DescripTion

The LTC^®4440 is a high frequency high side N-channel

MOSFET gate driver that is designed to operate in ap-

n

Wide Operating V Range: Up to 80V

IN

n

Rugged Architecture Tolerant of 100V V

IN

Transients

Powerful 1.5Ω Driver Pull-Down

plications with V voltages up to 80V. The LTC4440 can

IN

n

also withstand and continue to function during 100V V

IN

n

Powerful 2.4A Peak Current Driver Pull-Up

7ns Fall Time Driving 1000pF Load

10ns Rise Time Driving 1000pF Load

Drives Standard Threshold MOSFETs

TTL/CMOS Compatible Inputs with Hysteresis

Input Thresholds are Independent of Supply

Undervoltage Lockout

transients. The powerful driver capability reduces switch-

ing losses in MOSFETs with high gate capacitances. The

LTC4440’s pull-up has a peak output current of 2.4A and

its pull-down has an output impedance of 1.5Ω.

n

The LTC4440 features supply independent TTL/CMOS

compatible input thresholds with 350mV of hysteresis.

The input logic signal is internally level-shifted to the

bootstrapped supply, which may function at up to 115V

above ground.

Low Profile (1mm) SOT-23 (ThinSOT)™ and

Thermally Enhanced 8-Pin MSOP Packages

applicaTions

The LTC4440 contains both high side and low side under-

voltage lockout circuits that disable the external MOSFET

when activated.

n

Telecommunications Power Systems

n

Distributed Power Architectures

n

Server Power Supplies

The LTC4440 is available in the low profile (1mm) SOT-23

and thermally enhanced 8-lead MSOP packages.

n

High Density Power Modules

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property

of their respective owners. Protected by U.S. Patents, including 6677210.

PARAMETER

LTC4440

80V

LTC4440-5

60V

LTC4440A-5

80V

Max Operating TS

Absolute Max TS

100V

80V

100V

MOSFET Gate Drive

8V to 15V

6.3V

4V to 15V

3.2V

4V to 15V

3.2V

+

V

UV

CC

–

6.0V

3.04V

Typical applicaTion

Synchronous Phase-Modulated Full-Bridge Converter

V

IN

36V TO 72V

100V PEAK TRANSIENT

(ABS MAX)

LTC4440 Driving a 1000pF

Capacitive Load

V

CC

8V TO 15V

LTC4440

BOOST

V

CC

INPUT

(INP)

2V/DIV

INP

TG

TS

GND

OUTPUT

(TG – TS)

5V/DIV

LTC4440

V

BOOST

TG

V

CC

•

LTC3722-1

INP

GND

TS

4440 TA01

4440 F02

10ns/DIV

4440fa

1

For more information www.linear.com//LTC4440

LTC4440

absoluTe MaxiMuM raTings ^{(Note 1)}

Supply Voltage

Peak Output Current < 1µs (TG)................................. 4A

Driver Output TG (with Respect to TS)....... –0.3V to 15V

Operating Ambient Temperature Range

(Note 2) ..............................................–40°C to 85°C

Junction Temperature (Note 3) ............................ 125°C

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

Lead Temperature (Soldering, 10 sec)...................300°C

V

........................................................ –0.3V to 15V

CC

BOOST – TS........................................... –0.3V to 15V

INP Voltage ................................................ –0.3V to 15V

BOOST Voltage (Continuous)..................... –0.3V to 95V

BOOST Voltage (100ms) ...........................–0.3V to 115V

TS Voltage (Continuous) ............................... –5V to 80V

TS Voltage (100ms) .................................... –5V to 100V

pin conFiguraTion

TOP VIEW

INP

GND

1

2

3

4

8 TS

7 TG

6 BOOST

5 NC

V

1

6 BOOST

5 TG

CC

9

GND 2

INP 3

V

CC

GND

4 TS

MS8E PACKAGE

S6 PACKAGE

8-LEAD PLASTIC MSOP

6-LEAD PLASTIC SOT-23

T

= 125°C, θ = 40°C/W (NOTE 4)

JA

EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB

JMAX

T

= 125°C, θ = 230°C/W

JMAX

JA

orDer inForMaTion

LEAD FREE FINISH

LTC4440EMS8E#PBF

LTC4440ES6#PBF

TAPE AND REEL

PART MARKING

LTF9

PACKAGE DESCRIPTION

8-Lead Plastic MSOP

6-Lead Plastic SOT-23

TEMPERATURE RANGE

–40°C to 85°C

LTC4440EMS8E#TRPBF

LTC4440ES6#TRPBF

LTZY

–40°C to 85°C

Consult LTC Marketing for parts specified with wider operating temperature ranges.

Consult LTC Marketing for information on nonstandard lead based finish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/

The l denotes the specifications which apply over the full operating

elecTrical characTerisTics

temperature range, otherwise specifications are at T_A= 25°C. V_CC= V_BOOST= 12V, V_TS= GND = 0V, unless otherwise noted.

SYMBOL PARAMETER

Main Supply (V

CONDITIONS

MIN

TYP

MAX

UNITS

)

CC

I

DC Supply Current

Normal Operation

UVLO

VCC

INP = 0V

CC

250

25

400

80

µA

V

< UVLO Threshold (Falling) – 0.1V

l

UVLO

Undervoltage Lockout Threshold

V

Rising

Falling

5.7

5.4

6.5

6.2

300

7.3

7.0

V

mV

CC

Hysteresis

Bootstrapped Supply (BOOST – TS)

I

DC Supply Current

Normal Operation

UVLO

BOOST

INP = 0V

BOOST

110

86

180

170

µA

V

– V < UVLO

– 0.1V, V = INP = 5V

HS(FALLING) CC

TS

4440fa

2

For more information www.linear.com/LTC4440

LTC4440

elecTrical characTerisTics ^Thel denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T_A= 25°C. V_CC= V_BOOST= 12V, V_TS= GND = 0V, unless otherwise noted.

SYMBOL PARAMETER

UVLO Undervoltage Lockout Threshold

CONDITIONS

MIN

TYP

MAX

UNITS

l

V

– V Rising

6.75

6.25

7.4

6.9

500

7.95

7.60

V

mV

HS

BOOST

TS

– V Falling

TS

Hysteresis

Input Signal (INP)

l

V

High Input Threshold

Low Input Threshold

Input Voltage Hysteresis

Input Pin Bias Current

INP Ramping High

INP Ramping Low

1.3

1.6

1.25

0.350

0.01

2

V

IH

IL

0.85

1.6

– V

V

IH

IL

I

2

µA

INP

Output Gate Driver (TG)

V

High Output Voltage

I

= –10mA, V = V

– V

TG

0.7

150

2.4

1.5

V

mV

A

OH

OL

TG

OH

BOOST

l

Low Output Voltage

= 100mA

220

2.2

TG

I

Peak Pull-Up Current

Output Pull-Down Resistance

1.7

PU

R

Ω

DS

Switching Timing

t

Output Rise Time

10% – 90%, C = 1nF

10

100

ns

r

L

10% – 90%, C = 10nF

L

t

Output Fall Time

10% – 90%, C = 1nF

7

70

ns

f

L

10% – 90%, C = 10nF

L

l

t

Output Low-High Propagation Delay

Output High-Low Propagation Delay

30

28

65

ns

PLH

PHL

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 3: T is calculated from the ambient temperature T and power

dissipation PD according to the following formula:

J

A

Note 2: The LTC4440 is guaranteed to meet performance specifications

from 0°C to 70°C. Specifications over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

T = T + (PD • θ °C/W)

J A JA

Note 4: Failure to solder the exposed back side of the MS8E package to the

PC board will result in a thermal resistance much higher than 40°C/W.

Typical perForMance characTerisTics

V_CCSupply Quiescent Current

vs Voltage

BOOST – TS Supply Quiescent

Current vs Voltage

Output Low Voltage (V_OL

)

vs Supply Voltage

300

250

200

150

100

50

170

165

160

155

150

145

140

500

450

T

= 25°C

I

T

= 100mA

= 25°C

T

= 25°C

A

TG

A

INP = 0V

400

350

300

INP = V

CC

INP = V

CC

250

200

150

100

50

INP = 0V

0

11

12

13

14

15

8

9

10

0

5

10

15

0

10

BOOST – TS SUPPLY VOLTAGE (V)

15

5

V

SUPPLY VOLTAGE (V)

BOOST – TS SUPPLY VOLTAGE (V)

CC

4440 G01

4440 G03

4440 G02

4440fa

3

For more information www.linear.com//LTC4440

LTC4440

Typical perForMance characTerisTics

Output High Voltage (V_OH

)

Input Thresholds (INP)

vs Supply Voltage

V_CCSupply Current

at TTL Input Levels

vs Supply Voltage

15

2.0

1.8

380

360

340

320

300

280

260

240

220

200

T

= 25°C

T

= 25°C

T

= 25°C

A

14

13

V

IH

INP = 2V

(INPUT HIGH THRESHOLD)

I

= –1mA

TG

1.6

1.4

12

11

10

9

I

= –10mA

TG

V

IL

(INPUT LOW THRESHOLD)

I

= –100mA

TG

INP = 0.8V

1.2

1.0

0.8

8

7

9

10

12

13

14

15

8

11

7

9

11

13

15

12

SUPPLY VOLTAGE (V)

8

10

14

V

SUPPLY VOLTAGE (V)

BOOST – TS SUPPLY VOLTAGE (V)

V

CC

4440 G06

4440 G04

4440 G05

V_CCSupply Current (V_CC= 12V)

vs Temperature

V_CCUndervoltage Lockout

Thresholds vs Temperature

2MHz Operation

6.55

6.50

300

250

INPUT

(INP)

INP = 0V

5V/DIV

RISING THRESHOLD

6.45

6.40

6.35

6.30

6.25

6.20

6.15

INP = 12V

200

150

100

50

OUTPUT

(TG)

5V/DIV

FALLING THRESHOLD

4440 G07

V

CC

= 12V

250ns/DIV

0

30

60

90

120

–60 –30

0

30

60

90

120

–60 –30

TEMPERATURE (°C)

4440 G09

4440 G08

Boost Supply (BOOST – TS)

Undervoltage Lockout Thresholds

vs Temperature

Boost Supply Current

vs Temperature

Input Threshold vs Temperature

7.6

7.5

7.4

7.3

7.2

7.1

7.0

6.9

6.8

6.7

2.0

1.8

500

450

400

350

300

250

200

150

100

50

INP = 12V

RISING THRESHOLD

V

(V = 12V)

IH CC

V

(V = 15V)

IH CC

1.6

1.4

1.2

1.0

0.8

V

(V = 8V)

IH CC

V

(V = 12V)

IL CC

V

(V = 15V)

IL CC

(V = 8V)

IL CC

FALLING THRESHOLD

INP = 0V

0

30

60

90

120

–60 –30

0

30

60

90

120

–60 –30

0

30

60

90

120

–60 –30

TEMPERATURE (°C)

4440 G11

4440 G12

4440 G10

4440fa

4

For more information www.linear.com/LTC4440

LTC4440

Typical perForMance characTerisTics

Input Threshold Hysteresis

vs Temperature

Peak Driver (TG) Pull-Up Current

vs Temperature

500

480

460

440

420

400

380

360

340

320

300

3.0

2.9

2.8

2.7

2.6

2.5

2.4

2.3

2.2

2.1

2.0

BOOST – TS = 15V

V

-V (V = 12V)

IH IL CC

V

-V (V = 15V)

IH IL CC

BOOST – TS = 12V

V

-V (V = 8V)

IH IL CC

0

30

60

90

120

–60 –30

0

30

60

90

120

–60 –30

TEMPERATURE (°C)

4440 G14

4440 G13

Output Driver Pull-Down

Resistance vs Temperature

Propagation Delay vs Temperature

(V_CC= BOOST = 12V)

45

40

35

30

25

20

15

10

5

3.0

2.5

t

BOOST – TS = 12V

BOOST – TS = 8V

PLH

2.0

1.5

1.0

0.5

0

t

PHL

BOOST – TS = 15V

0

30

60

90

120

–60 –30

0

30

60

90

120

–60 –30

TEMPERATURE (°C)

4440 G16

4440 G15

pin FuncTions

SOT-23 Package

V

(Pin 1): Chip Supply. This pin powers the internal low

TG (Pin 5): High Current Gate Driver Output (Top Gate).

CC

side circuitry. A low ESR ceramic bypass capacitor should

This pin swings between TS and BOOST.

be tied between this pin and the GND pin (Pin 2).

BOOST (Pin 6): High Side Bootstrapped Supply. An

external capacitor should be tied between this pin and

TS (Pin 4). Normally, a bootstrap diode is connected

GND (Pin 2): Chip Ground.

INP (Pin 3): Input Signal. TTL/CMOS compatible input

referenced to GND (Pin 2).

between V (Pin 1) and this pin. Voltage swing at this

CC

pin is from V – V to V + V – V , where V is the

CC

D

IN

CC

D

TS (Pin 4): Top (High Side) Source Connection.

forward voltage drop of the bootstrap diode.

4440fa

5

For more information www.linear.com//LTC4440

LTC4440

pin FuncTions

Exposed Pad MS8E Package

INP (Pin 1): Input Signal. TTL/CMOS compatible input

referenced to GND (Pin 2).

BOOST(Pin6):HighSideBootstrappedSupply.Anexternal

capacitor should be tied between this pin and TS (Pin 8).

Normally, a bootstrap diode is connected between V

(Pin 3) and this pin. Voltage swing at this pin is from V

CC

GND (Pins 2, 4): Chip Ground.

V

(Pin 3): Chip Supply. This pin powers the internal low

– V to V + V – V , where V is the forward voltage

CC

D

IN

CC

D

side circuitry. A low ESR ceramic bypass capacitor should

drop of the bootstrap diode.

be tied between this pin and the GND pin (Pin 2).

TG (Pin 7): High Current Gate Driver Output (Top Gate).

This pin swings between TS and BOOST.

NC (Pin 5): No Connect. No connection required. For

convenience, this pin may be tied to Pin 6 (BOOST) on

the application board.

TS (Pin 8): Top (High Side) Source Connection.

Exposed Pad (Pin 9): Ground. Must be electrically con-

nected to Pins 2 and 4 and soldered to PCB ground for

optimum thermal performance.

block DiagraM

V

IN

UP TO 80V,

TRANSIENT

UP TO 100V

BOOST

HIGH SIDE

UNDERVOLTAGE

LOCKOUT

V

CC

UNDERVOLTAGE

LOCKOUT

TG

TS

8V TO 15V

GND

INP

BOOST

LEVEL SHIFTER

4440 BD

GND

TS

TiMing DiagraM

INPUT RISE/FALL TIME <10ns

V

IH

INPUT (INP)

V

IL

90%

10%

OUTPUT (TG)

t

r

t

f

t

PHL

PLH

4440 TD

4440fa

6

For more information www.linear.com/LTC4440

LTC4440

applicaTions inForMaTion

Overview

V

BOOST

IN

UP TO 100V

The LTC4440 receives a ground-referenced, low voltage

digital input signal to drive a high side N-channel power

MOSFET whose drain can float up to 100V above ground,

eliminating the need for a transformer between the low

voltage control signal and the high side gate driver. The

LTC4440 normally operates in applications with input

LTC4440

C

Q1

N1

GD

TG

POWER

MOSFET

C

GS

LOAD

INDUCTOR

4440 F03

supply voltages (V ) up to 80V, but is able to withstand

IN

–

V

TS

and continue to function during 100V, 100ms transients

on the input supply.

Figure 3. Capacitance Seen by TG During Switching

The powerful output driver of the LTC4440 reduces the

switching losses of the power MOSFET, which increase

with transition time. The LTC4440 is capable of driving a

1nF load with 10ns rise and 7ns fall times using a boot-

powerMOSFET’sgateispulledlow(gateshortedtosource

through N1) by the LTC4440, its source (TS) is pulled low

by its load (e.g., an inductor or resistor). The slew rate

of the source/gate voltage causes current to flow back to

the MOSFET’s gate through the gate-to-drain capacitance

strapped supply voltage V

of 12V.

BOOST–TS

(C ). If the MOSFET driver does not have sufficient sink

Input Stage

GD

current capability (low output impedance), the current

TheLTC4440employsTTL/CMOScompatibleinputthresh-

oldsthatallowalowvoltagedigitalsignaltodrivestandard

powerMOSFETs.TheLTC4440containsaninternalvoltage

regulator that biases the input buffer, allowing the input

through the power MOSFET’s C can momentarily pull

GD

the gate high, turning the MOSFET back on.

AsimilarscenarioexistswhentheLTC4440isusedtodrive

a low side MOSFET. When the low side power MOSFET’s

gateispulledlowbytheLTC4440,itsdrainvoltageispulled

high by its load (e.g., inductor or resistor). The slew rate

of the drain voltage causes current to flow back to the

MOSFET’s gate through its gate-to-drain capacitance. If

the MOSFET driver does not have sufficient sink current

capability (low output impedance), the current through

thresholds (V = 1.6V, V = 1.25V) to be independent of

IH

IL

variations in V . The 350mV hysteresis between V and

CC

IH

V eliminates false triggering due to noise during switch-

IL

ing transitions. However, care should be taken to keep this

pin from any noise pickup, especially in high frequency,

high voltage applications. The LTC4440 input buffer has a

high input impedance and draws negligible input current,

simplifying the drive circuitry required for the input.

the power MOSFET’s C can momentarily pull the gate

GD

high, turning the MOSFET back on.

Output Stage

Rise/Fall Time

AsimplifiedversionoftheLTC4440’soutputstageisshown

inFigure3.Thepull-downdeviceisanN-channelMOSFET

(N1) and the pull-up device is an NPN bipolar junction

transistor(Q1). Theoutputswingsfromthelowerrail(TS)

Since the power MOSFET generally accounts for the ma-

jority of the power loss in a converter, it is important to

quickly turn it on or off, thereby minimizing the transition

time in its linear region. The LTC4440 can drive a 1nF load

with a 10ns rise time and 7ns fall time.

to within an NPN V (~0.7V) of the positive rail (BOOST).

BE

This large voltage swing is important in driving external

power MOSFETs, whose R

is inversely proportional

DS(ON)

The LTC4440’s rise and fall times are determined by the

peak current capabilities of Q1 and N1. The predriver that

drivesQ1andN1usesanonoverlappingtransitionscheme

to minimize cross-conduction currents. N1 is fully turned

off before Q1 is turned on and vice versa.

to its gate overdrive voltage (V – V ).

GS

TH

The LTC4440’s peak pull-up (Q1) current is 2.4A while the

pull-down (N1) resistance is 1.5Ω. The low impedance

of N1 is required to discharge the power MOSFET’s gate

capacitanceduringhigh-to-lowsignaltransitions.Whenthe

4440fa

7

For more information www.linear.com//LTC4440

LTC4440

applicaTions inForMaTion

Power Dissipation

Undervoltage Lockout (UVLO)

To ensure proper operation and long-term reliability, the

LTC4440 must not operate beyond its maximum tem-

perature rating. Package junction temperature can be

calculated by:

The LTC4440 contains both low side and high side un-

dervoltage lockout detectors that monitor V and the

CC

bootstrapped supply V

. When V falls below

BOOST–TS

CC

6.2V, the internal buffer is disabled and the output pin

OUT is pulled down to TS. When V falls below

BOOST – TS

T = T + PD (θ )

J

A

JA

6.9V, OUT is pulled down to TS. When both supplies are

undervoltage, OUT is pulled low to TS and the chip enters

a low current mode, drawing approximately 25µA from

where:

T = Junction Temperature

J

V

CC

and 86µA from BOOST.

T = Ambient Temperature

A

PD = Power Dissipation

Bypassing and Grounding

θ

JA

= Junction-to-Ambient Thermal Resistance

The LTC4440 requires proper bypassing on the V

CC

Power dissipation consists of standby and switching

power losses:

and V

supplies due to its high speed switching

BOOST–TS

(nanoseconds)andlargeACcurrents(Amperes).Careless

component placement and PCB trace routing may cause

excessive ringing and under/overshoot.

PD = P

+ P

AC

STDBY

where:

To obtain the optimum performance from the LTC4440:

P

= Standby Power Losses

= AC Switching Losses

STDBY

A. Mount the bypass capacitors as close as possible

AC

between the V and GND pins and the BOOST and

CC

The LTC4440 consumes very little current during standby.

The DC power loss at V = 12V and V = 12V is

only (250µA + 110µA)(12V) = 4.32mW.

TS pins. The leads should be shortened as much as

CC

BOOST–TS

possible to reduce lead inductance.

B. Use a low inductance, low impedance ground plane to

reduceanygrounddropandstraycapacitance.Remem-

ber that the LTC4440 switches >2A peak currents and

anysignificantgrounddropwilldegradesignalintegrity.

AC switching losses are made up of the output capacitive

load losses and the transition state losses. The capacitive

load losses are primarily due to the large AC currents

needed to charge and discharge the load capacitance dur-

ing switching. Load losses for the output driver driving a

C. Plan the power/ground routing carefully. Know where

the large load switching current is coming from and

going to. Maintain separate ground return paths for

the input pin and the output power stage.

pure capacitive load C

would be:

OUT

2

Load Capacitive Power = (C )(f)(V

)

OUT

BOOST–TS

The power MOSFET’s gate capacitance seen by the driver

D. Keep the copper trace between the driver output pin

and the load short and wide.

output varies with its V voltage level during switching.

GS

A power MOSFET’s capacitive load power dissipation can

be calculated using its gate charge, Q . The Q value

E. When using the MS8E package, be sure to solder the

exposed pad on the back side of the LTC4440 package

G

corresponding to the MOSFET’s V value (V in this

GS

CC

2

case) can be readily obtained from the manufacturer’s

Q vs V curves:

to the board. Correctly soldered to a 2500mm double-

sided 1oz copper board, the LTC4440 has a thermal

resistance of approximately 40°C/W. Failure to make

good thermal contact between the exposed back side

and the copper board will result in thermal resistances

far greater than 40°C/W.

G

GS

Load Capacitive Power (MOS) = (V )(Q )(f)

BOOST–TS G

Transition state power losses are due to both AC currents

required to charge and discharge the driver’s internal

nodal capacitances and cross-conduction currents in the

internal gates.

4440fa

8

For more information www.linear.com/LTC4440

LTC4440

Typical applicaTions

•

4440fa

9

For more information www.linear.com//LTC4440

LTC4440

Typical applicaTions

•

E F F I C I E N C Y ( % )

4440fa

10

For more information www.linear.com/LTC4440

LTC4440

package DescripTion

MS8E Package

8-Lead Plastic MSOP, Exposed Die Pad

(Reference LTC DWG # 05-08-1662 Rev K)

BOTTOM VIEW OF

EXPOSED PAD OPTION

1.88

(.074)

1.68

1

0.29

REF

1.88 ±0.102

(.074 ±.004)

0.889 ±0.127

(.035 ±.005)

(.066)

0.05 REF

DETAIL “B”

5.10

(.201)

MIN

3.20 – 3.45

(.126 – .136)

1.68 ±0.102

CORNER TAIL IS PART OF

THE LEADFRAME FEATURE.

FOR REFERENCE ONLY

(.066 ±.004)

DETAIL “B”

8

NO MEASUREMENT PURPOSE

3.00 ±0.102

(.118 ±.004)

(NOTE 3)

0.65

(.0256)

BSC

0.52

(.0205)

REF

0.42 ±0.038

(.0165 ±.0015)

8

7 6 5

TYP

RECOMMENDED SOLDER PAD LAYOUT

3.00 ±0.102

(.118 ±.004)

(NOTE 4)

4.90 ±0.152

(.193 ±.006)

DETAIL “A”

0.254

(.010)

0° – 6° TYP

GAUGE PLANE

1

2

3

4

0.53 ±0.152

(.021 ±.006)

1.10

(.043)

MAX

0.86

(.034)

REF

DETAIL “A”

0.18

(.007)

SEATING

PLANE

0.22 – 0.38

(.009 – .015)

TYP

0.1016 ±0.0508

(.004 ±.002)

0.65

(.0256)

BSC

MSOP (MS8E) 0213 REV K

NOTE:

1. DIMENSIONS IN MILLIMETER/(INCH)

2. DRAWING NOT TO SCALE

3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.

MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.

INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX

6. EXPOSED PAD DIMENSION DOES INCLUDE MOLD FLASH. MOLD FLASH ON E-PAD

SHALL NOT EXCEED 0.254mm (.010") PER SIDE.

4440fa

11

For more information www.linear.com//LTC4440

LTC4440

package DescripTion

S6 Package

6-Lead Plastic TSOT-23

(Reference LTC DWG # 05-08-1636)

2.90 BSC

(NOTE 4)

0.62

MAX

0.95

REF

1.22 REF

1.4 MIN

1.50 – 1.75

2.80 BSC

3.85 MAX 2.62 REF

(NOTE 4)

PIN ONE ID

RECOMMENDED SOLDER PAD LAYOUT

PER IPC CALCULATOR

0.30 – 0.45

6 PLCS (NOTE 3)

0.95 BSC

0.80 – 0.90

0.20 BSC

DATUM ‘A’

0.01 – 0.10

1.00 MAX

0.30 – 0.50 REF

1.90 BSC

0.09 – 0.20

(NOTE 3)

S6 TSOT-23 0302

NOTE:

1. DIMENSIONS ARE IN MILLIMETERS

2. DRAWING NOT TO SCALE

3. DIMENSIONS ARE INCLUSIVE OF PLATING

4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR

5. MOLD FLASH SHALL NOT EXCEED 0.254mm

6. JEDEC PACKAGE REFERENCE IS MO-193

4440fa

12

For more information www.linear.com/LTC4440

LTC4440

revision hisTory

REV

DATE

DESCRIPTION

PAGE NUMBER

B

1013

Added comparison table

1

4440fa

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

13

For more information www.linear.com//LTC4440

LTC4440

Typical applicaTion

LTC3723-2/LTC4440/LTC3901 240W 42V-56V_INto Unregulated 12V Half-Bridge Converter

L1

0.56µH

V

IN

V

E

V

IN

48V

IN

–V

IN

2

7

9

V

1µF

100V

1µF

OUT

L2 0.22µH

1µF

100V

11V

1

V

100V

D1

OUT

T2

1500pF

100V

V

F

20Ω 1W

70(980H):1

+

C2

180µF

16V

4

3

11

+

CS

V

CC

3

6

5

1

8

7

A

INP BOOST

LTC4440ES6

TG

1µF

100V

1µF

100V

1µF

–V

Si7370DP

×2

Si7852DP

3

5

×2

GND TS

OUT

2

4

0.22µF

C1

2.2nF

250V

V

E

F

–V

OUT

D2

D3

12V

4.7k

1/4W

4.7k

1/4W

1

6

B

L3

1mH

+

C3

68µF

T1

5:4:4:2:2

Si7852DP

×2

10k 3k

V

12V

MMBT3904

11V

IN

11

+

12 14 15

–

6

5

–

2

3

16

A

6

T3

+

33.2k

100Ω

MMBT3904

V

OUT

CSF

CSF MF MF2 CSE

CSE ME ME2 V

CC

4

1(1.5mH):0.5

1

15k

1/4W

2

1

4

9

120Ω

LTC3901EGN

DRVA DRVB

SYNC

PV

CC

SDRB

5

1k

0.1µF

100Ω

5

V

CC

GND PGND GND2 PGND2

10 13

TIMER

7

22Ω

3

8

1µF

LTC3723EGN-2

215k

SDRA

8

4

10V

MMBZ5240B

15

11

220pF

UVLO

DPRG

12

COMP

330pF

+

B

CS

0.22µF

V

RAMP

9

C

T

SPRG GND CS SS FB

4440 TA04

REF

1

1µF, 100V TDK C4532X7R2A105M

C1: MURATA DE2E3KH222MB3B

C2: SANYO 16SP180M

C3: AVX TPSE686M020R0150

D1-D3: BAS21

D4, D5: MMBD914

8

16

7

10 14 13

–V

OUT

1µF

100pF

D4

D5

1k

62k

1µF

150pF

10k

2N7002

4.7k

30.1k

0.47µF

330pF

0.47µF

470pF

7.5Ω 7.5Ω

L1: COILCRAFT DO1813P-561HC

L2: SUMIDA CDEP105-0R2NC-50

L3: COILCRAFT DO1608C-105

T1: PULSE PA0801.005

12V

MMBZ5242B

T2: PULSE P8207

T3: PULSE PA0785

relaTeD parTs

PART NUMBER

DESCRIPTION

COMMENTS

4.5V to 18V Supply Range

LTC1155

Dual Micropower High/Low Side Drivers with

Internal Charge Pump

LT^®1161

LTC1163

LT1339

Quad Protected High Side MOSFET Driver

Triple 1.8V to 6V High Side MOSFET Driver

High Power Synchronous DC/DC Controller

Isolated RS485 Transceiver

8V to 48V Supply Range, t = 200µs, t = 28µs

ON OFF

1.8V to 6V Supply Range, t = 95µs, t = 45µs

ON

OFF

Current Mode Operation Up to 60V, Dual N-Channel Synchronous Drive

2500V of Isolation Between Line Transceiver and Logic Level Interface

LTC1535

RMS

LTC1693 Family High Speed Dual MOSFET Drivers

LT3010/LT3010-5 50mA, 3V to 80V Low Dropout Micropower Regulators

1.5A Peak Output Current, 4.5V ≤ V ≤ 13.2V

IN

Low Quiescent Current (30µA), Stable with Small (1µF) Ceramic Capacitor

LT3430

High Voltage, 3A, 200kHz Step-Down Switching Regulator Input Voltages Up to 60V, Internal 0.1Ω Power Switch, Current Mode

Architecture, 16-Pin Exposed Pad TSSOP Package

LTC3722-1/

LTC3722-2

Synchronous Dual Mode Phase Modulated Full-Bridge

Controllers

Adaptive Zero Voltage Switching, High Output Power Levels

(Up to Kilowatts)

LTC3723-1/

LTC3723-2

Synchronous Push-Pull PWM Controllers

Current Mode or Voltage Mode Push-Pull Controllers

LTC3900

LTC3901

Synchronous Rectifier Driver for Forward Converters

Programmable Time Out, Reverse Inductor Current Sense

Secondary Side Synchronous Driver for Push-Pull and

Full-Bridge Converters

LTC4441

6A MOSFET Driver

Adjustable Gate Drive from 5V to 8V, 5V ≤ V ≤ 28V

IN

4440fa

LT 1013 REV A • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

14

For more information www.linear.com/LTC4440

●

(408)432-1900 FAX: (408) 434-0507 www.linear.com/LTC4440

 LINEAR TECHNOLOGY CORPORATION 2003


型号：	LTC4440EMS8E-5#TR
厂家：	Linear
描述：	LTC4440-5 - High Speed, High Voltage, High Side Gate Driver; Package: MSOP; Pins: 8; Temperature Range: -40°C to 85°C 栅驱动光电二极管接口集成电路驱动器
文件：	总14页 (文件大小：226K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LTC4440EMS8E-5#TR [Linear]

相关型号：

LTC4440EMS8E-5#TRPBF

LTC4440ES6

LTC4440ES6#PBF

LTC4440ES6#TRM

LTC4440ES6#TRMPBF

LTC4440ES6#TRPBF

LTC4440ES6-5

LTC4440ES6-5#PBF

LTC4440ES6-5#TR

LTC4440ES6-5#TRM

LTC4440ES6-5#TRPBF

LTC4440IS6#TRPBF