LTC4232 datasheet(3/18 Pages) AD

3 / 18 page

LT4200

Rev. 0

For more information www.analog.com

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

DC Characteristics

VDD

Input Supply Range

2.9

IDD

Input Supply Current

MOSFET On, No Load

1.6

VDD(UVL)

Input Supply Undervoltage Lockout

VDD Rising

2.63

2.73

2.85

IOUT

OUT Leakage Current

VOUT = VGATE = 0V, VDD = 15V,

–700

700

µA

OUT Operating Current

VOUT = VGATE = 12V, VDD = 12V

µA

dVGATE/dt

OUT Turn-On Ramp Rate

GATE Open

0.15

0.35

0.6

V/ms

RON

MOSFET On-Resistance

Including Current Sense Resistor

0.6

1.2

2.2

mΩ

ILIM(TH)

Current Limit Threshold

VFB = 1.35V, ISET Open

VFB = 0V, ISET Open

VFB = 1.35V, RSET = 20k

50.2

4.6

6.8

63.8

SOA

MOSFET Safe Operating Area

12.6V, 6.8A Folded Back, 7.5W√s (Note 5)

7.7

Inputs

IIN

OV, UV, FB Input Current

V = 1.2V

±1

µA

ISENSE+(IN)

SENSE+ Input Current

VSENSE+ = 12V

±10

µA

VTH

OV, UV, FB Threshold Voltage

VPIN Rising

1.205

1.235

1.265

∆VOV(HYST)

OV Hysteresis

∆VUV(HYST)

UV Hysteresis

110

VUV(RTH)

UV Reset Threshold Voltage

VUV Falling

0.55

0.62

0.7

∆VFB(HYST)

FB Power Good Hysteresis

RISET

ISET Internal Resistor

kΩ

Outputs

VINTVCC

INTVCC Output Voltage

VDD = 5V,15V, ILOAD = 0mA, –10mA

2.7

3.1

3.4

VOL

PG, FLT# Output Low Voltage

I = 2mA

0.4

0.8

IOH

PG, FLT# Input Leakage Current

V = 30V

±10

µA

VTIMER(H)

TIMER High Threshold

VTIMER Rising

1.2

1.235

1.28

VTIMER(L)

TIMER Low Threshold

VTIMER Falling

0.1

0.21

0.3

ITIMER(UP)

TIMER Pull-Up Current

VTIMER = 0V

–80

–100

–120

µA

ITIMER(DN)

TIMER Pull-Down Current

VTIMER = 1.2V

1.4

2.6

µA

ITIMER(RATIO)

TIMER Current Ratio ITIMER(DN)/ITIMER(UP)

1.6

2.7

AIMON

IMON Current Gain

20A to 50A, TJ = 0°C to 125°C

1.92

2.08

µA/A

BWIMON

IMON Bandwidth

250

kHz

IOFF(IMON)

IMON Offset Current

IOUT = 1.5A, TJ = 0°C to 125°C

±3

µA

IGATE(UP)

Gate Pull-Up Current

Gate Drive On, VGATE = VOUT = 12V

–18

–24

–29

µA

IGATE(DN)

Gate Pull-Down Current

Gate Drive Off, VGATE = 22V, VOUT = 12V

165

500

µA

IGATE(FST)

Gate Fast Pull-Down Current

Fast Turn Off, VGATE = 22V, VOUT = 12V

140

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VDD = 12V unless otherwise noted.

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