LTC3624HMSE-3.3#TRPBF,LTC3624HMSE-3.3#TRPBF pdf中文资料,LTC3624HMSE-3.3#TRPBF引脚图,LTC3624HMSE-3.3#TRPBF电路-Datasheet-电子工程世界

LTC3624/LTC3624-2

17V, 2A Synchronous

Step-Down Regulator with

3.5µA Quiescent Current

FeaTures

n

DescripTion

The

LTC

®

3624/LTC3624-2

is a high efficiency 17V, 2A

synchronous monolithic step-down regulator. The switch-

ing frequency is fixed to 1MHz (LTC3624) or 2.25MHz

(LTC3624-2) with a ±40% synchronization range. The

regulator features ultralow quiescent current and high

efficiency over a wide V

OUT

range.

The step-down regulator operates from an input voltage

range of 2.7V to 17V and provides an adjustable output

range from 0.6V to V

IN

while delivering up to 2A of output

current. A user-selectable mode input is provided to allow

the user to trade off ripple noise for light load efficiency;

Burst Mode operation provides the highest efficiency at

light loads, while pulse-skipping mode provides the lowest

voltage ripple. The MODE pin can also be used to sync the

switching frequency to an external clock.

LTC3624/LTC3624-2 Options

PART NAME

LTC3624

LTC3624-3.3

LTC3624-5

LTC3624-2

LTC3624-23.3

LTC3624-25

FREQUENCY

1MHz

2.25MHz

V

OUT

Adjustable

3.3V

5V

Adjustable

3.3V

5V

n

Wide V

IN

Range: 2.7V to 17V

Wide V

OUT

Range: 0.6V to V

IN

95% Max Efficiency

Low I

Q

: 3.5µA, Zero-Current Shutdown

Constant Frequency (1MHz/2.25MHz)

Fixed V

OUT

Options Available

Low Dropout Operation (100% Duty Cycle) with

Ultralow I

Q

2A Rated Output Current

±1% Output Voltage Accuracy

Current Mode Operation for Excellent Line and Load

Transient Response

Synchronizable to External Clock

Pulse-Skipping, Forced Continuous, Burst Mode

®

Operation

Internal Compensation and Soft-Start

Overtemperature Protection

Compact 8-Lead DFN (3mm

×

3mm) Package

applicaTions

n

Battery Powered Equipment

Portable Instrumentation

Emergency Radios

General Purpose Step-Down Supplies

L,

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

and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners. Protected by U.S. Patents, including 5481178, 6580258,

6498466, 6611131, 6177787, 5705919, 5847554, 6703692.

Typical applicaTion

5V V

OUT

with 800mA Burst Clamp, f

SW

= 1MHz

EFFICIENCY (%)

Efficiency and Power Loss vs Load

100

90

V

OUT

= 5V

1.2

1.0

POWER LOSS (W)

0.8

0.6

0.4

V

IN

= 12V

V

IN

= 8V

V

IN

= 6V

FREQ = 1MHz

0

1

0.5

1.5

LOAD CURRENT (A)

2

3624 TA01b

V

IN

5.6V TO 17V

3.3µH

V

IN

10µF

RUN

SW

LTC3624-5

FB

MODE/SYNC

INTV

CC

GND

V

OUT

5V

2A

47µF

36242 TA01a

80

70 BURST MODE OPERATION

60

50

40

30

20

10

0

2.2µF

0.2

0

36242fd

For more information

www.linear.com/LTC3624

1

LTC3624/LTC3624-2

absoluTe MaxiMuM raTings

V

IN

Voltage ................................................. –0.3V to 17V

RUN Voltage............................................... –0.3V to 17V

MODE/SYNC, FB Voltages............................ –0.3V to 6V

INTV

CC

, PGOOD Voltages ............................ –0.3V to 6V

(Note 1)

Operating Junction Temperature Range

(Notes 2, 5) ............................................ –40°C to 150°C

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

pin conFiguraTion

TOP VIEW

SW

V

IN

RUN

PGOOD

1

2

3

4

9

GND

8 GND

7 MODE/SYNC

6 INTV

CC

5 FB

SW

V

IN

V

IN

RUN

PGOOD

1

2

3

4

5

6

TOP VIEW

12

11

10

9

8

7

GND

MODE/SYNC

INTV

CC

FB

NC

13

GND

DD PACKAGE

8-LEAD (3mm

×

3mm) PLASTIC DFN

T

JMAX

= 125°C,

θ

JA

= 43°C/W,

θ

JC

= 5.5°C/W

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

MSE PACKAGE

12-LEAD PLASTIC MSOP

T

JMAX

= 150°C,

θ

JA

= 40°C/W,

θ

JC

= 10°C/W

EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB FOR

OPTIMAL THERMAL PERFORMANCE

orDer inForMaTion

LEAD FREE FINISH

LTC3624EDD#PBF

LTC3624IDD#PBF

LTC3624EMSE#PBF

LTC3624IMSE#PBF

LTC3624HMSE#PBF

LTC3624EDD-3.3#PBF

LTC3624IDD-3.3#PBF

LTC3624EMSE-3.3#PBF

LTC3624IMSE-3.3#PBF

LTC3624HMSE-3.3#PBF

LTC3624EDD-5#PBF

LTC3624IDD-5#PBF

LTC3624EMSE-5#PBF

LTC3624IMSE-5#PBF

LTC3624HMSE-5#PBF

LTC3624EDD-2#PBF

LTC3624IDD-2#PBF

LTC3624EMSE-2#PBF

LTC3624IMSE-2#PBF

TAPE AND REEL

LTC3624EDD#TRPBF

LTC3624IDD#TRPBF

LTC3624EMSE#TRPBF

LTC3624IMSE#TRPBF

LTC3624HMSE#TRPBF

http://www.linear.com/product/LTC3624#orderinfo

PART MARKING*

LGJF

3624

LGRG

362433

LGRD

36245

LGMN

36242

PACKAGE DESCRIPTION

8-Lead (3mm

×

3mm) Plastic DFN

8-Lead (3mm

×

3mm) Plastic DFN

12-Lead Plastic MSOP

8-Lead (3mm

×

3mm) Plastic DFN

8-Lead (3mm

×

3mm) Plastic DFN

12-Lead Plastic MSOP

8-Lead (3mm

×

3mm) Plastic DFN

8-Lead (3mm

×

3mm) Plastic DFN

12-Lead Plastic MSOP

8-Lead (3mm

×

3mm) Plastic DFN

8-Lead (3mm

×

3mm) Plastic DFN

12-Lead Plastic MSOP

TEMPERATURE RANGE

–40°C to 125°C

–40°C to 150°C

–40°C to 125°C

–40°C to 150°C

–40°C to 125°C

–40°C to 150°C

–40°C to 125°C

36242fd

LTC3624EDD-3.3#TRPBF

LTC3624IDD-3.3#TRPBF

LTC3624EMSE-3.3#TRPBF

LTC3624IMSE-3.3#TRPBF

LTC3624HMSE-3.3#TRPBF

LTC3624EDD-5#TRPBF

LTC3624IDD-5#TRPBF

LTC3624EMSE-5#TRPBF

LTC3624IMSE-5#TRPBF

LTC3624HMSE-5#TRPBF

LTC3624EDD-2#TRPBF

LTC3624IDD-2#TRPBF

LTC3624EMSE-2#TRPBF

LTC3624IMSE-2#TRPBF

2

For more information

www.linear.com/LTC3624

LTC3624/LTC3624-2

orDer inForMaTion

LEAD FREE FINISH

LTC3624HMSE-2#PBF

LTC3624EDD-23.3#PBF

LTC3624IDD-23.3#PBF

LTC3624EMSE-23.3#PBF

LTC3624IMSE-23.3#PBF

LTC3624HMSE-23.3#PBF

LTC3624EDD-25#PBF

LTC3624IDD-25#PBF

LTC3624EMSE-25#PBF

LTC3624IMSE-25#PBF

LTC3624HMSE-25#PBF

TAPE AND REEL

LTC3624HMSE-2#TRPBF

LTC3624EDD-23.3#TRPBF

LTC3624IDD-23.3#TRPBF

LTC3624EMSE-23.3#TRPBF

LTC3624IMSE-23.3#TRPBF

LTC3624HMSE-23.3#TRPBF

LTC3624EDD-25#TRPBF

LTC3624IDD-25#TRPBF

LTC3624EMSE-25#TRPBF

LTC3624IMSE-25#TRPBF

LTC3624HMSE-25#TRPBF

http://www.linear.com/product/LTC3624#orderinfo

PART MARKING*

36242

LGRH

362423

LGRF

362425

PACKAGE DESCRIPTION

12-Lead Plastic MSOP

8-Lead (3mm

×

3mm) Plastic DFN

8-Lead (3mm

×

3mm) Plastic DFN

12-Lead Plastic MSOP

8-Lead (3mm

×

3mm) Plastic DFN

8-Lead (3mm

×

3mm) Plastic DFN

12-Lead Plastic MSOP

TEMPERATURE RANGE

–40°C to 150°C

–40°C to 125°C

–40°C to 150°C

–40°C to 125°C

–40°C to 150°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

Consult LTC Marketing for information on non-standard 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/.

Some packages are available in 500 unit reels through

designated sales channels with #TRMPBF suffix.

The

l

denotes the specifications which apply over the specified operating

junction temperature range, otherwise specifications are at T

J

= 25°C. (Note 2) V

IN

= 12V, unless otherwise noted.

SYMBOL

V

IN

V

OUT

I

VIN

V

FB

V

OUT

PARAMETER

Operating Voltage

Output Voltage Range

Input Quiescent Current

Shutdown Mode, V

RUN

= 0V

Burst Mode Operation

Forced Continuous Mode (Note 3)

(Note 4)

l

elecTrical characTerisTics

CONDITIONS

MIN

2.7

0.6

TYP

MAX

17

V

IN

UNITS

V

µA

mA

V

%/V

%

µA

mΩ

%

ns

0.1

3.5

1.8

0.594

0.591

3.267

3.250

4.950

4.925

0.6

3.3

5.0

0.01

0.1

115

1.0

7

0.606

0.609

3.333

3.350

5.050

5.075

0.015

1

Regulated Feedback Voltage

Regulated Fixed Output Voltage

LTC3624-3.3/LTC3624-23.3 (Note 4)

l

LTC3624-5/LTC3624-25 (Note 4)

l

ΔV

LINE(REG)

ΔV

LOAD(REG)

I

LSW

R

DS(ON)

D

MAX

t

ON(MIN)

V

RUN

I

RUN

Reference Voltage Line Regulation

Output Voltage Load Regulation

NMOS Switch Leakage

PMOS Switch Leakage

NMOS On-Resistance

PMOS On-Resistance

Maximum Duty Cycle

Minimum On-Time

RUN Input High

RUN Input Low

RUN Input Current

V

IN

= 2.7V to 17V (Note 4)

(Note 4)

V

IN

= 5V

V

FB

= 0.5V, V

MODE/SYNC

= 1.5V

l

200

100

60

0.35

1.0

0

100

V

nA

36242fd

V

RUN

= 12V

For more information

www.linear.com/LTC3624

3

LTC3624/LTC3624-2

The

l

denotes the specifications which apply over the specified operating

junction temperature range, otherwise specifications are at T

J

= 25°C. (Note 2) V

IN

= 12V, unless otherwise noted.

SYMBOL

V

MODE/SYNC

I

MODE/SYNC

t

SS

I

LIM

I

FB

I

FB(VOUT)

V

UVLO

V

UVLO(HYS)

V

OVLO

V

OVLO(HYS)

f

OSC

PARAMETER

Pulse-Skipping Mode

Burst Mode Operation

Forced Continuous Mode

MODE/SYNC Input Current

Internal Soft-Start Time

Peak Current Limit

FB Input Current

Feedback Input Leakage Current

V

INTVCC

Undervoltage Lockout

V

INTVCC

Undervoltage Lockout Hysteresis

V

IN

Overvoltage Lockout Rising

V

IN

Overvoltage Lockout Hysteresis

Oscillator Frequency

LTC3624/LTC3624-3.3/LTC3624-5

(E-, I-Grade)

(H-Grade)

LTC3624-2/LTC3624-23.3/LTC3624-25

(E-, I-Grade)

(H-Grade)

f

SYNC

V

INTVCC

ΔV

PGOOD

SYNC Capture Range

V

INTVCC

LDO Output Voltage

Power Good Range

LTC3624/LTC3624-3.3/LTC3624-5

LTC3624-2/LTC3624-23.3/LTC3624-25

V

IN

> 4V

LTC3624/LTC3624-2

LTC3624-3.3/LTC3624-5/LTC3624-23.3/

LTC3624-25

R

PGOOD

t

PGOOD

Power Good Resistance

PGOOD Delay

PGOOD Low to High

PGOOD High to Low

l

elecTrical characTerisTics

CONDITIONS

MIN

V

INTVCC

– 0.4

1.0

TYP

MAX

0.3

V

INTVCC

– 1.2

UNITS

V

nA

ms

A

nA

µA

V

mV

V

mV

MHz

%

V

%

Ω

Cycles

0

1

V

IN

> 5V (E-, I-Grade)

V

IN

> 5V (H-Grade)

Fixed Output Versions

V

IN

Ramping Up

2.4

18

0.92

0.82

0.78

2.05

1.8

1.7

50

3.2

3.6

±7.5

280

0

32

l

100

3.6

10

2.4

2.3

3

2

2.6

175

19

500

1.00

10

2.7

20

1.08

1.16

2.45

2.6

150

140

4.0

±11.5

±13

350

2.25

Note 1:

Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2:

The LTC3624/LTC3624-2 is tested under pulsed load conditions

such that T

J

≈ T

A

. The LTC3624E/LTC3624E-2 is guaranteed to meet

specifications from 0°C to 85°C junction temperature. Specifications over

the –40°C to 125°C operating junction temperature range are assured by

design, characterization and correlation with statistical process controls.

The LTC3624I/LTC3624I-2 is guaranteed over the –40°C to 125°C

operating junction temperature range and the LTC3624H is guaranteed

over the –40°C to 150°C operating junction temperature range. High

junction temperatures degrade operating lifetimes; operation lifetime is

decreased for junction temperatures greater than 125°C. Note that the

maximum ambient temperature consistent with these specifications is

determined by specific operating conditions in conjunction with board

layout, the rated package thermal impedance and other environmental

factors. T

J

is calculated from the ambient, T

A

, and power dissipation, P

D

,

according to the following formula:

T

J

= T

A

+ (P

D

•

θ

JA

)

Note 3:

The quiescent current in forced continuous mode does not include

switching loss of the power FETs.

Note 4:

The LTC3624 is tested in a proprietary test mode that servos FB to

the output of the error amplifier.

Note 5:

This IC includes overtemperature protection that is intended to

protect the device during momentary overload conditions. The maximum

rated junction temperature will be exceeded when overtemperature

protection is active Continuous operation above the specified maximum

operating junction temperature may impair device reliability. The

overtemperature protection level is not production tested but guaranteed

by design.

4

36242fd

For more information

www.linear.com/LTC3624

LTC3624/LTC3624-2

Typical perForMance characTerisTics

T

J

= 25°C, unless otherwise noted.

Efficiency vs Load Current at 1MHz

100

90

80

EFFICIENCY (%)

70

60

50

40

30

20

10

Burst Mode OPERATION

V

OUT

= 5V

V

OUT

= 3.3V

V

OUT

= 2.5V

1 2

36242 G01

Efficiency vs Load Current in

Burst Mode Operation at 2.25MHz

100

90

80

EFFICIENCY (%)

70

60

50

40

30

20

10

V

OUT

= 5V

V

OUT

= 3V

V

OUT

= 2.5V

1

2

Burst Mode OPERATION

100

90

80

70

60

50

40

30

20

10

Efficiency vs Load Current in

Dropout

Burst Mode

OPERATION

FORCE CONTINUOUS

MODE

V

IN

= 12V

0

0.0001

0.001

0.01

0.1

LOAD CURRENT (A)

V

IN

= 12V

0

0.001

0.01

0.1

LOAD CURRENT (A)

0

0.0001

V

IN

= 5V

100% DUTY CYCLE

FREQ = 1MHz

0.001

0.01

0.1

LOAD CURRENT (A)

1 2

36242 G03

36242 G02

10

9

8

7

I

Q

(µA)

5

4

3

2

1

0

I

Q

vs V

IN

12

10

8

I

Q

(µA)

I

Q

vs Temperature

Burst Mode Operation

SW

5V/DIV

V

OUT

AC-COUPLED

50mV/DIV

I

L

1A/DIV

4µs/DIV

36242 G06

6

SLEEP

6

SLEEP

4

2

SHUTDOWN

0

2

4

6

8

10 12 14 16 18 20

V

IN

(V)

36242 G04

SHUTDOWN

0

–50

0

100

50

TEMPERATURE (°C)

150

36242 G05

V

IN

= 12V

V

OUT

= 2.5V

Burst Mode OPERATION

I

OUT

= 30mA

L = 2.2µH

Pulse-Skipping Mode Operation

V

OUT

200mV/DIV

I

L

2A/DIV

I

LOAD

2A/DIV

4µs/DIV

V

IN

= 12V

V

OUT

= 2.5V

PULSE-SKIPPING MODE

I

OUT

= 10mA

L = 2.2µH

36242 G07

Load Transient Response

RUN

10V/DIV

Soft-Start Operation

SW

5V/DIV

V

OUT

AC-COUPLED

50mV/DIV

I

L

1A/DIV

I

L

0.5A/DIV

V

OUT

1V/DIV

PGOOD

5V/DIV

40µs/DIV

V

IN

= 12V

V

OUT

= 2.5V

I

LOAD

= 0A to 1.8A

FORCED CONTINUOUS MODE

36242 G08

1ms/DIV

V

IN

= 12V

V

OUT

= 2.5V

I

LOAD

= 1A

36242 G09

36242fd

For more information

www.linear.com/LTC3624

5

参数名称	属性值
功能	降压
输出配置	正
拓扑	降压
输出类型	固定
输出数	1
电压 - 输入（最小值）	2.7V
电压 - 输入（最大值）	17V
电压 - 输出（最小值/固定）	3.3V
电流 - 输出	2A
频率 - 开关	1MHz
同步整流器	是
工作温度	-40°C ~ 150°C（TJ）
安装类型	表面贴装
封装/外壳	12-TSSOP（0.118"，3.00mm 宽）裸露焊盘
供应商器件封装	12-MSOP-EP

LTC3624HMSE-3.3#TRPBF

LTC3624HMSE-3.3#TRPBF概述

LTC3624HMSE-3.3#TRPBF规格参数

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