LT3741 datasheet(5/32 Pages) LINER

5 / 32 page

LT8390

8390fa

For more information www.linear.com/LT8390

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V, VEN/UVLO = 1.5V unless otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SS Fault Latch-Off Threshold

1.7

SS Fault Reset Threshold

0.2

Oscillator

RT Pin Voltage

RT = 100kΩ

1.00

Switching Frequency

VSYNC/SPRD = 0V, RT = 226kΩ

VSYNC/SPRD = 0V, RT = 100kΩ

VSYNC/SPRD = 0V, RT = 59.0kΩ

190

380

570

200

400

600

210

420

630

kHz

SYNC Frequency

150

650

kHz

SYNC/SPRD Input Bias Current

VSYNC/SPRD = 5V

–0.1

0.1

µA

SYNC/SPRD Threshold Voltage

0.4

1.5

Highest Spread Spectrum Above Oscillator Frequency

VSYNC/SPRD = 5V

12.5

14.5

16.5

Lowest Spread Spectrum Below Oscillator Frequency

VSYNC/SPRD = 5V

–17.7

–15.7

–13.7

Region Transition

Buck-Boost to Boost (VIN/VOUT)

0.73

0.75

0.77

Boost to Buck-Boost (VIN/VOUT)

0.83

0.85

0.87

Buck to Buck-Boost (VIN/VOUT)

1.16

1.18

1.20

Buck-Boost to Buck (VIN/VOUT)

1.31

1.33

1.35

Peak-Buck to Peak-Boost (VIN/VOUT)

0.96

0.98

1.00

Peak-Boost to Peak-Buck (VIN/VOUT)

1.00

1.02

1.04

NMOS Drivers

TG1, TG2 Gate Driver On-Resistance

Gate Pull-Up

Gate Pull-Down

V(BST-SW) = 5V

2.6

1.4

BG1, BG2 Gate Driver On-Resistance

Gate Pull-Up

Gate Pull-Down

VINTVCC = 5V

3.2

1.2

TG1, TG2 Rise Time

TG1, TG2 Fall Time

CL = 3.3nF, 10% to 90%

CL = 3.3nF, 90% to 10%

BG1, BG2 Rise Time

BG1, BG2 Fall Time

CL = 3.3nF, 10% to 90%

CL = 3.3nF, 90% to 10%

TG Off to BG On Delay

CL = 3.3nF

BG Off to TG On Delay

CL = 3.3nF

TG1 Minimum Duty Cycle in Buck Region

Peak-Buck Current Mode

TG1 Maximum Duty Cycle in Buck Region

Peak-Buck Current Mode

TG1 Fixed Duty Cycle in Buck-Boost Region

Peak-Boost Current Mode

BG2 Fixed Duty Cycle in Buck-Boost Region

Peak-Buck Current Mode

BG2 Minimum Duty Cycle in Boost Region

Peak-Boost Current Mode

BG2 Maximum Duty Cycle in Boost Region

Peak-Boost Current Mode

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 LT8390E is guaranteed to meet performance specifications

from 0°C to 125°C operating 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 LT8390I is guaranteed over the –40°C to 125°C operating junction

temperature range. The LT8390H is guaranteed over the –40°C to 150°C

operating junction temperature range. High junction temperatures degrade

operating lifetimes. Operating lifetime is derated at junction temperatures

greater than 125°C.

Note 3: The LT8390 includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 150°C when overtemperature protection is active.

Continuous operation above the specified absolute maximum operating

junction temperature may impair device reliability.

LT3741 データシート(PDF) 5 Page - Linear Technology

LT3741 データシート(HTML) 5 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

データシートダウンロード

リンク URL

LT3741 データシート(PDF) 5 Page - Linear Technology

LT3741 データシート(HTML) 5 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

データシート ダウンロード

リンク URL

データシートダウンロード