LT3684EDD Просмотр технического описания (PDF) - Linear Technology

Номер в каталоге

Компоненты Описание

Список матч

LT3684EDD

36V, 2A, 2.8MHz Step-Down Switching Regulator

Linear Technology 

LT3684

ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VRUNS/SS = 10V VBOOST = 15V, VBIAS = 3.3V unless otherwise

noted. (Note 2)

PARAMETER

Minimum Bias Voltage

CONDITIONS

MIN TYP MAX UNITS

2.7

3

V

Feedback Voltage

FB Pin Bias Current (Note 3)

FB Voltage Line Regulation

Error Amp gm

Error Amp Gain

4V < VIN < 34V

1.25 1.265 1.28

● 1.24 1.265 1.29

●

30

100

0.002 0.02

330

1000

V

V

nA

%/V

µMho

VC Source Current

75

µA

VC Sink Current

100

µA

VC Pin to Switch Current Gain

3.5

A/V

VC Clamp Voltage

Switching Frequency

Minimum Switch Off-Time

RT = 8.66k

RT = 29.4k

RT = 187k

2

V

2.7

3.0

3.3

MHz

1.25

1.4

1.55

MHz

250

300

350

kHz

●

100 150

nS

Switch Current Limit

Duty Cycle = 5%

3.1

3.6

4.0

A

Switch VCESAT

Boost Schottky Reverse Leakage

Minimum Boost Voltage (Note 4)

ISW = 2A

VSW = 10V, VBIAS = 0V

360

mV

0.02

2

µA

●

1.6

2.1

V

BOOST Pin Current

RUN/SS Pin Current

RUN/SS Input Voltage High

ISW = 1A

VRUN/SS = 2.5V

18

30

mA

5

10

µA

2.5

V

RUN/SS Input Voltage Low

0.2

V

PG Threshold Offset from Feedback Voltage

PG Hysteresis

VFB Rising

100

mV

10

mV

PG Leakage

PG Sink Current

VPG = 5V

VPG = 0.4V

0.1

1

µA

● 100

300

µA

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 LT3684E is guaranteed to meet performance specifications

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

temperature range are assured by design, characterization and correlation

with statistical process controls. The LT3684I specifications are

guaranteed over the –40°C to 125°C temperature range.

Note 3: Bias current measured in regulation. Bias current flows into the FB

pin.

Note 4: This is the minimum voltage across the boost capacitor needed to

guarantee full saturation of the switch.

3684f

3

Share Link: