LT3573(RevB) 查看數據表（PDF） - Linear Technology

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LT3573
(Rev.:RevB)

Isolated Flyback Converter without an Opto-Coupler

Linear Technology 

LT3573

Absolute Maximum Ratings

SW.............................................................................60V

VIN, SHDN/UVLO, RFB, BIAS......................................40V

SS, VC, TC, RREF, RILIM................................................5V

Maximum Junction Temperature........................... 125°C

Operating Junction Temperature Range (Note 2)

LT3573E............................................. –40°C to 125°C

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

Pin Configuration

TOP VIEW

GND 1

16 GND

TEST 2

15 TC

GND 3

14 RREF

SW 4

VIN 5

17

13 RFB

12 VC

BIAS 6

11 RILIM

SHDN/UVLO 7

10 SS

GND 8

9 GND

MSE PACKAGE

16-LEAD PLASTIC MSOP

TJMAX = 125°C, θJA = 50°C/W, θJC = 10°C/W

EXPOSED PAD (PIN 17) IS GND, MUST BE CONNECTED TO GND

Order Information

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3573EMSE#PBF

LT3573EMSE#TRPBF

3573

16-Lead Plastic MSOP

–40°C to 125°C

LT3573IMSE#PBF

LT3573IMSE#TRPBF

3573

16-Lead Plastic MSOP

–40°C to 125°C

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

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/

Electrical Characteristics The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, unless otherwise noted.

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Input Voltage Range

l

3

40

V

Quiescent Current

Soft-Start Current

SS = 0V

VSHDN/UVLO = 0V

SS = 0.4V

3.5

mA

0

1

µA

7

µA

SHDN/UVLO Pin Threshold

UVLO Pin Voltage Rising

l 1.15 1.22 1.29

V

SHDN/UVLO Pin Hysteresis Current

Soft-Start Threshold

VUVLO = 1V

2

2.5

3

µA

0.7

V

Maximum Switching Frequency

1000

kHz

Switch Current Limit

Minimum Current Limit

Switch VCESAT

RREF Voltage

RILIM = 10k

VC = 0V

ISW = 0.5A

VIN = 3V

1.25 1.55 1.85

A

200

mA

150

250

mV

1.21 1.23 1.25

V

l 1.20

1.25

RREF Voltage Line Regulation

RREF Pin Bias Current

IREF Reference Current

3V < VIN < 40V

(Note 3)

Measured at RFB Pin with RREF = 6.49k

0.01 0.03

%/V

l

100

600

nA

190

µA

3573fb



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