LM5145 datasheet(9/69 Pages) TI

9 / 69 page

8.5 Electrical Characteristics

Over the recommended operating junction temperature range of –40°C to 150°C (unless otherwise noted), typical values

correspond to TJ = 25℃, VVIN = 12 V, VVCCX = 5 V, VVOUT1 = 3.3 V, VVOUT2 = 5 V, VEN1 = VEN2 = 5 V, RRT = 10 kΩ, FSW = 2.2

MHz, no load on the drive outputs (HO1, HOL1, LO1, LOL1, HO2, HOL2, LO2, and LOL2).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INPUT VOLTAGE (VIN)

ISHUTDOWN

Shutdown mode current

VEN1 = VEN2 = 0 V

3.5

µA

ISTANDBY1

Standby current, channel 1

VEN1 = 5 V, VEN2 = 0 V, VVOUT1 = 3.3 V, in

regulation, no load, not switching, DEMB =

MODE = GND

µA

ISTANDBY2

Standby current, channel 2

VEN1 = 0 V, VEN2 = 5 V, VVOUT2 = 5 V, in

regulation, no load, not switching, DEMB =

MODE = GND

µA

ISTANDBY3

Standby current, channel 1, ultra-low

IQ mode

VEN1 = 5 V, VEN2 = 0 V, VVOUT1 = 3.3 V, in

regulation, no load, not switching, DEMB =

GND, RMODE = 10 kΩ to GND

16.5

µA

ISTANDBY4

Standby current, channel 2, ultra-low

IQ mode

VEN1 = 0 V, VEN2 = 5 V, VVOUT2 = 5 V, in

regulation, no load, not switching, DEMB =

GND, RMODE = 10 kΩ to GND

µA

BIAS REGULATOR (VCC)

VVCC-REG

VCC regulation voltage

IVCC = 100 mA, VVCCX = 0 V

4.7

5.3

VCC-UVLO

VCC UVLO rising threshold

VVCC rising

3.2

3.3

3.4

VVCC-HYST

VCC UVLO hysteresis

182

IVCC-LIM

VCC sourcing current limit

235

ANALOG BIAS (VDDA)

VVDDA-REG

VDDA regulation voltage

4.75

5.25

VVDDA-UVLO

VDDA UVLO rising threshold

VVCC rising, VVCCX = 0 V

3.1

3.2

3.3

VVDDA-HYST

VDDA UVLO hysteresis

VVCCX = 0 V

RVDDA

VDDA resistance

VVCCX = 0 V

EXTERNAL BIAS (VCCX)

VVCCX-ON

VCCX(ON) rising threshold

4.1

4.3

4.4

RVCCX

VCCX resistance

VVCCX = 5 V

1.2

VVCCX-HYST

VCCX hysteresis voltage

130

CURRENT LIMIT (CS1, CS2)

VCS1

Current limit threshold 1

Measured from CS1 to VOUT1

VCS2

Current limit threshold 2

Measured from CS2 to VOUT2

tCS-DELAY

CS delay to output

GCS

CS amplifier gain

11.25

12.6

V/V

ICS-BIAS

CS amplifier input bias current

POWER GOOD (PG1, PG2)

PG1UV

PG1 UV trip level

Falling with respect to the regulation voltage

89.5%

92%

94%

PG2UV

PG2 UV trip level

Falling with respect to the regulation voltage

89.5%

92%

94%

PG2OV

PG2 OV trip level