LT3573E 查看數據表（PDF） - Linear Technology

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LT3573E

Isolated Flyback Converter without an Opto-Coupler

Linear Technology 

LT3573

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

Error Amplifier Voltage Gain

VIN = 3V

150

V/V

Error Amplifier Transconductance

Minimum Switching Frequency

TC Current into RREF

BIAS Pin Voltage

DI = 10µA, VIN = 3V

VC = 0.35V

RTC = 20.1k

IBIAS = 30mA

150

µmhos

40

kHz

27.5

µA

2.9

3

3.1

V

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 LT3573E is guaranteed to meet performance specifications

from 0°C to 125°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

LT3573I is guaranteed over the full –40°C to 125°C operating junction

temperature range.

Note 3: Current flows out of the RREF pin.

TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.

Output Voltage

5.20

5.15

5.10

5.05

5.00

4.95

4.90

4.85

4.80

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

3573 G01

Quiescent Current

7

6

VIN = 40V

5

4

VIN = 5V

3

2

1

0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

3573 G02

Bias Pin Voltage

3.2

VIN = 40V

3.0

VIN = 12V

2.8

2.6

2.4

2.2

2.0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

3573 G03

For more information www.linear.com/LT3573

3573fd

3

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