Datasheet > 3570

3570

更新时间： 2022-12-26 14:43:06

品牌	Logo	应用领域
凌特 - Linear		转换器控制器
页数	文件大小	规格书
20页	283K
描述
1.5A Buck Converter, 1.5A Boost Converter and LDO Controller

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3570 数据手册

LT3570

ELECTRICAL CHARACTERISTICS ^Thel denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at T_A= 25°C. V_IN1,2,3= 12V, V_SHDN1,2,3= 12V unless otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SW2

Error Ampliﬁer 2 Transconductance

Error Ampliﬁer 2 Voltage Gain

195

100

700

5.4

μMho

V/V

A/V

Pin Switching Threshold

to SW2 Current Gain

SW2 Current Limit

SW2 V

(Note 7)

1.5

2.4

3.1

= 1A (Note 7)

SW2

240

0.2

μA

CESAT

SW2 Leakage Current

BOOST Pin Current

SW2 = 0V, V = 40V, V

= 0V

IN2

SHDN2

= 0.5A

= 1.5A

SW2

LDO

LDO Maximum Output Current

FB3

= 600mV

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 LT3570E 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

LT3570I is guaranteed over the full –40°C to 125°C operating junction

temperature range.

Note 4: Shutdown current is for each individual input current.

Note 5: Current ﬂows into the pin.

Note 6: Current ﬂows out of the pin.

Note 7: Switch current limit and switch V

guaranteed by design

CESAT

and/or correlation to static test.

Note 8: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed the maximum operating junction temperature

range when overtemperature protection is active. Continuous operation

above the speciﬁed maximum operating junction temperature may impair

device reliability.

Note 3: V supplies power for the part. V supplies power only to the

IN2

IN1

boost converter. V supplies power only to the LDO Controller.

IN3

TYPICAL PERFORMANCE CHARACTERISTICS

Feedback Voltage vs Temperature

Frequency vs Temperature

Soft-Start Current vs Temperature

5.0

4.8

4.6

4.4

4.2

4.0

3.8

3.6

2500

0.800

0.795

0.790

0.785

0.780

0.775

0.770

= 7.87k

2000

1500

= 20k

1000

500

= 44.2k

75 100

TEMPERATURE (°C)

–50 –25

25 50 75 100 125 150

TEMPERATURE (°C)

3570 G03

–50 –25

25 50

125 150

TEMPERATURE (°C)

–50 –25

75 100 125 150

3570 G01

3570 G02

3570fa

1 2 345 6 7...20

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