LTC4211 datasheet(4/22 Pages) LINER

4 / 22 page

LTC4235

4235f

For more information www.linear.com/LTC4235

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Inputs

VD2OFF(H,TH)

D2OFF Pin High Threshold

D2OFF Rising

1.21

1.235

1.26

VD2OFF(L,TH)

D2OFF Pin Low Threshold

D2OFF Falling

1.19

1.215

1.24

∆VD2OFF(HYST) D2OFF Pin Hysteresis

VON(TH)

ON Pin Threshold Voltage

ON Rising

1.21

1.235

1.26

VON(RESET)

ON Pin Fault Reset Threshold Voltage

ON Falling

0.57

0.6

0.63

∆VON(HYST)

ON Pin Hysteresis

120

IIN(LEAK)

Input Leakage Current (ON, D2OFF)

V = 5V

±1

µA

VEN(TH)

EN Pin Threshold Voltage

EN Rising

1.185

1.235

1.284

∆VEN(HYST)

EN Pin Hysteresis

110

200

IEN(UP)

EN Pull-Up Current

EN = 1V

–7

–10

–13

µA

VFTMR(H)

FTMR Pin High Threshold

1.198

1.235

1.272

VFTMR(L)

FTMR Pin Low Threshold

0.15

0.2

0.25

IFTMR(UP)

FTMR Pull-Up Current

FTMR = 1V, In Fault Mode

–80

–100

–120

µA

IFTMR(DN)

FTMR Pull-Down Current

FTMR = 2V, No Faults

1.3

2.7

µA

DRETRY

Auto-Retry Duty Cycle

0.07

0.15

0.23

tRST(ON)

ON Low to FAULT High

µs

Outputs

IOUT

OUT Pin Current

OUT = 11V, IN = 12V, ON = 2V

OUT = 13V, IN = 12V, ON = 2V

100

2.5

170

µA

VOL

Output Low Voltage (FAULT, PWRGD)

I = 1mA

I = 3mA

0.15

0.4

1.2

VOH

Output High Voltage (FAULT, PWRGD)

I = –1µA

INTVCC

– 1

INTVCC

– 0.5

IOH

Input Leakage Current (FAULT, PWRGD) V = 18V

±1

µA

IPU

Output Pull-Up Current (FAULT, PWRGD) V = 1.5V

–7

–10

–13

µA

Current Monitor

∆VREG

Floating Regulator Voltage

(VSENSE+ – VREG)

IREG = ±1µA

3.6

4.1

4.6

∆VSENSE(FS)

Input Sense Voltage Full Scale

(VSENSE+ – VSENSE–)

SENSE+ = 12V

VIMON(OS)

IMON Input Offset Voltage

∆VSENSE = 0V

±150

µV

GIMON

IMON Voltage Gain

∆VSENSE = 20mV and 5mV

100

101

V/V

VIMON(MAX)

IMON Maximum Output Voltage

∆VSENSE = 70mV

3.5

5.5

VIMON(MIN)

IMON Minimum Output Voltage

∆VSENSE = 200µV

RIMON(OUT)

IMON Output Resistance

∆VSENSE = 200µV

kΩ

elecTrical characTerisTics The

denotes the specifications which apply over the full operating

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

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

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

otherwise specified.

Note 3: An internal clamp limits the DGATE and CPO pins to a minimum of

10V above and a diode below IN. Driving these pins to voltages beyond the

clamp may damage the device.

Note 4: An internal clamp limits the HGATE pin to a minimum of 10V

above and a diode below OUT. Driving this pin to voltages beyond the

clamp may damage the device.

Note 5: Thermal resistance is specified when the exposed pad is soldered

to a 3" x 5", four layer, FR4 board.

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