LTC4380 datasheet(4/24 Pages) AD

4 / 24 page

LTC4381

Rev. 0

For more information www.analog.com

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: All currents into device pins are positive; all currents out of

device pins are negative. All voltages are referenced to GND unless

otherwise specified.

Note 3: Internal clamps limit the DRN pin to a minimum of 10V above the

OUT and SNS pins.

Note 4: Internal clamps limit the GATE pin to a minimum of 10V above the

OUT pin or VCC pin, or 50V (SEL = VCC) or 31.5V (SEL = GND) above the

GND pin (LTC4381-1/LTC4381-2). Driving this pin to voltages beyond the

clamp may damage the device.

Note 5: IN ABS MAX is rated at 25°C to 125°C only.

Note 6: Total supply current is the sum of the current into the VCC, OUT,

SNS and DRN pins.

Note 7: The LTC4381 can operate through the cold crank down to 4V in

automotive applications, wheres VCC is powered with a 12V supply initially

and stays above 8V during the cold crank period.

Note 8: Operating voltage is limited by the maximum GATE voltage of 86V.

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX UNITS

VGATE

GATE Clamp to GND

VCC = 30V, SEL = 0V, LTC4381-1/LTC4381-2

VCC = 60V, SEL = VCC, LTC4381-1/LTC4381-2

47.5

31.5

52.5

IGATE(UP)

GATE Pull-Up Current

VCC = GATE = OUT = 12V, 24V

–8.5

–20

–35

µA

IGATE(DN)

GATE Pull-Down Current

Overcurrent

Shutdown

Input UV

Fault Time Out

∆VSNS = 200mV, GATE = 12V, OUT = 0V

ON = 0V, GATE = 20V

VCC = 1.5V, GATE = 10V

TMR = 2V, GATE = 10V

0.3

1.5

100

3.5

IFLT

FLT Leakage Current

FLT = 80V

µA

VFLT(LOW)

FLT Output Low

ISINK = 0.1mA

ISINK = 3mA

0.1

0.5

ITMR(DN)

TMR Pull-Down Current

TMR = 0.8V

1.2

1.6

2.75

µA

ITMR(UP, COOL) TMR Pull-Up Current, Cool Down TMR = 2V

–1

–2

–3

µA

ITMR(UP)

TMR Pull-Up Current, Overvoltage

Small OV, Light Load

High OV, Light Load

Small OV, Heavy Load

High OV, Heavy Load

TMR = 0.8V, OUT = 11V, VDS = 1.1V, ∆VSNS = 0mV

OUT = 28V, TMR = 0.8V

IDRN = 0.1mA, ∆VSNS = 10mV

IDRN = 1mA, ∆VSNS = 10mV

IDRN = 0.1mA, ∆VSNS = 40mV

IDRN = 1mA, ∆VSNS = 40mV

–0.7

–3.5

–13

–10

–60

–1.6

–6.7

–30

–20

–120

–2.4

–12

–61

–30

–180

µA

TMR Pull-Up Current, Overcurrent

Small OV, Light Load

High OV, Light Load

Small OV, Heavy Load

High OV, Heavy Load

TMR = 0.8V

IDRN = 0mA, OUT = 11V

IDRN = 0mA, OUT = 0V

IDRN = 0.1mA, OUT = 11V

IDRN = 1mA, OUT = 11V

IDRN = 0.1mA, OUT = 0V

IDRN = 1mA, OUT = 0V

–3

–16

–80

–35

–130

–6

–24

–27

–142

–50

–170

–9

–36

–38

–206

–60

–220

µA

VTMR(F)

TMR Gate Off Threshold

TMR Rising

1.178 1.215 1.251

AC Characteristics

Retry Duty Cycle; Overvoltage,

LTC4381-2/LTC4381-4

∆VSNS = 40mV, IDRN = 5µA, OUT = 28V, VCC = 29V

2.8

4.2

∆VSNS = 40mV, IDRN = 500µA, OUT = 28V, VCC = 80V

0.1

0.2

Retry Duty-Cycle; Overcurrent,

LTC4381-2/LTC4381-4

IDRN = 500µA

OUT = 0V

OUT = 6V

0.1

0.35

0.2

0.7

tON(ON)

Turn-On Propagation Delay

ON Steps from 0V to 1.5V, OUT = SNS = 0V

7.5

tOFF(ON)

Turn-Off Propagation Delay

ON Steps from 1.5V to 0V, OUT = SNS = VCC

µs

tOFF(OC)

Overcurrent Turn-Off

Propagation Delay

∆VSNS Steps from 0V to 250mV, OUT = 6V

µs

∆VSNS Steps from 0V to 250mV, OUT = 0V

µs

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = OUT = SNS = DRN = 12V, unless otherwise noted.

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