LM5019_15 datasheet(5/30 Pages) TI

5 / 30 page

LM5019

www.ti.com

SNVS788F – JANUARY 2012 – REVISED DECEMBER 2014

6.5 Electrical Characteristics

Typical values correspond to TJ = 25°C. Minimum and maximum limits apply over –40°C to 125°C junction temperature range

unless otherwise stated. VIN = 48 V unless stated otherwise. See

(1).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VCC SUPPLY

VCC Reg

VCC Regulator Output

VIN = 48 V, ICC = 20 mA

6.25

7.6

8.55

VCC Current Limit

VIN = 48 V

(2)

VCC Undervoltage Lockout Voltage

4.15

4.5

4.9

(VCC Increasing)

VCC Undervoltage Hysteresis

300

VCC Drop Out Voltage

VIN = 9 V, ICC = 20 mA

2.3

IIN Operating Current

Non-Switching, FB = 3 V

1.75

IIN Shutdown Current

UVLO = 0 V

225

µA

SWITCH CHARACTERISTICS

Buck Switch RDS(ON)

ITEST = 200 mA, BST-SW = 7 V

0.8

1.8

Ω

Synchronous RDS(ON)

ITEST = 200 mA

0.45

Ω

Gate Drive UVLO

VBST − VSW Rising

2.4

3.6

Gate Drive UVLO Hysteresis

260

CURRENT LIMIT

Current Limit Threshold

–40°C

≤ TJ ≤ 125°C

150

240

300

Current Limit Response Time

Time to Switch Off

150

Off-Time Generator (Test 1)

FB = 0.1 V, VIN = 48 V

µs

Off-Time Generator (Test 2)

FB = 1 V, VIN = 48 V

2.5

µs

REGULATION AND OVERVOLTAGE COMPARATORS

Internal Reference Trip Point for

FB Regulation Level

1.2

1.225

1.25

Switch ON

FB Overvoltage Threshold

Trip Point for Switch OFF

1.62

FB Bias Current

UNDERVOLTAGE SENSING FUNCTION

UV Threshold

UV Rising

1.19

1.225

1.26

UV Hysteresis Input Current

UV = 2.5 V

–10

–20

–29

µA

Remote Shutdown Threshold

Voltage at UVLO Falling

0.32

0.66

Remote Shutdown Hysteresis

110

THERMAL SHUTDOWN

Tsd

Thermal Shutdown Temperature

165

°C

Thermal Shutdown Hysteresis

°C

(1)

All hot and cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying

statistical process control.

(2)

VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading.

Submit Documentation Feedback

Product Folder Links: LM5019

LM5019 Datasheet(PDF) 5 Page - Texas Instruments

LM5019 Datasheet(HTML) 5 Page - Texas Instruments

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

Datasheet Download

Link URL