LM3424 datasheet(7/69 Pages) TI1

7 / 69 page

LM3424, LM3424-Q1

www.ti.com

SNVS603C – AUGUST 2009 – REVISED AUGUST 2015

Electrical Characteristics (continued)

MIN and MAX limits apply over the full Operating Temperature Range (TA = TJ = −40°C to 125°C) unless otherwise specified.

Minimum and Maximum limits are ensured through test, design, or statistical correlation. Unless otherwise stated the following

condition applies: TJ = 25°C, VIN = 14 V.

PARAMETER

TEST CONDITIONS

MIN(1)

TYP(2)

MAX(1)

UNIT

Transconductance Bandwidth

ICSH = 100 µA

(3)

500

kHz

GATE DRIVER (GATE)

RSRC-GATE

GATE Sourcing Resistance

GATE = High

Ω

RSNK-GATE

GATE Sinking Resistance

GATE = Low

1.3

4.5

Ω

UNDERVOLTAGE LOCKOUT and DIM INPUT (nDIM)

VTH-nDIM

nDIM / UVLO Threshold

1.185

1.240

1.285

IHYS-nDIM

nDIM Hysteresis Current

µA

DIM DRIVER (DDRV)

RSRC-DDRV

DDRV Sourcing Resistance

DDRV = High

13.5

Ω

RSNK-DDRV

DDRV Sinking Resistance

DDRV = Low

3.5

Ω

nDIM rising to DDRV rising

700

nDIM falling to DDRV falling

360

SOFT-START (SS)

ISS

Soft-start current

µA

THERMAL CONTROL

VS Voltage

IVS = 0A

2.4

2.45

2.5

IVS = 1 mA

TREF input bias current

VTREF = 1.5 V

0.1

µA

VTSENSE = 1.5 V

TSENSE Input Bias Current

VTREF = 1.5 V

0.1

µA

VTSENSE = 1.5 V

ITGAIN-MAX

TGAIN Maximum Sourcing Current VTGAIN = 2 V

200

600

µA

ITF

CSH Current with High-side

RTGAIN = 10

VTREF = 1.5 V

100

µA

Amplifier Disabled

Ω

VTSENSE = 0.5 V

VTREF = 1.5 V

µA

VTSENSE = 1.4 V

VTREF = 1.5 V

µA

VTSENSE = 1.5 V

THERMAL SHUTDOWN

TSD

Thermal Shutdown Threshold

See(3)

165

°C

THYS

Thermal Shutdown Hysteresis

See(3)

°C

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