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LT3840

3840fa

For more information www.linear.com/LT3840

elecTrical characTerisTics The

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Power Good

PG Threshold as a Percentage of VFB

VFB Rising

PG Hysteresis as a Percentage of VFB

2.5

PG Leakage

VPG = 5V

0.1

µA

PG Sink Current

VPG = 0.3V

µA

MOSFET Gate Drivers

Non-Overlap Time TG to BG

Non-Overlap Time BG to TG

TG Minimum On Time

150

TG Minimum Off Time

240

TG Maximum Duty Cycle

RT = 49.9k

TG, BG Drive On Voltage

7.5

TG, BG Drive Off Voltage

TG, BG Drive Rise Time

CTG = CBG = 3300pF

TG, BG Drive Fall Time

CTG = CBG = 3300pF

BOOST UVLO (Rising)

VBOOST - VSW

4.5

5.3

BOOST UVLO Hysteresis

350

Internal Auxiliary Supply

INTVCC Regulation Voltage

7.25

7.5

7.75

INTVCC UVLO Threshold (Rising)

6.25

6.5

6.75

INTVCC UVLO Hysteresis

300

INTVCC Current in Shutdown

VEN = 0.3V

µA

INTVCC Output Current

2.5V ≤ VIN ≤ 60V (Note 4)

100

INTVCC Burst Mode Current

VMODE = 0V

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 LT3840E 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

LT3840I is guaranteed over the –40°C to 125°C operating junction

temperature range. The LT3840H is guaranteed over the full –40°C to

150°C operating junction temperature range. The LT3840MP is 100%

tested and guaranteed over the –55°C to 150°C temperature range. High

junction temperatures degrade operating lifetimes; Operating lifetime is

derated for junction temperatures greater than 125°C.

Note 3: Supply current specification does not include switch drive

currents. Actual supply currents will be higher.

Note 4: Specification is not tested but is guaranteed by design,

characterization and correlation with statistical process controls.

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