LTC4352 datasheet(3/16 Pages) LINER

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LTC4352

4352f

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

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

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supplies

VIN

Input Operating Range

With External 2.9V to 4.7V VCC Supply

With External 4.7V to 6V VCC Supply

2.9

VCC

VCC(EXT)

VCC External Supply Range

2.9

VCC(INT)

VCC Internal Regulator Voltage

3.5

4.1

4.7

IIN

VIN Supply Current

VIN = 0V, VCC = 5V, VOUT = 18V

1.4

–10

–13

μA

ICC

External VCC Supply Current

VCC = 5V, VIN = 0V

1.25

2.5

VCC(UVLO)

VCC Undervoltage Lockout Threshold

VCC Rising

2.45

2.57

2.7

ΔVCC(HYST)

VCC Undervoltage Lockout Hysteresis

Ideal Diode Control

VFWD(REG)

Forward Regulation Voltage (VIN − VOUT)

ΔVGATE

MOSFET Gate Drive (VGATE – VSOURCE)VFWD = 0.1V, I = 0 and –1μA

56.1

7.5

tON(GATE)

GATE Turn-On Delay

CGATE = 10nF, VFWD = 0.2V

0.25

0.5

μs

tOFF(GATE)

GATE Turn-Off Delay

CGATE = 10nF, VFWD = −0.2V

0.2

0.5

μs

Input/Output Pins

VUV,OV(TH)

UV, OV Threshold Voltage

VUV Falling, VOV Rising

490

500

510

ΔVUV,OV(HYST)

UV, OV Threshold Hysteresis

2.5

8.5

VREV(TH)

REV Threshold Voltage

0.8

1.0

1.2

IUV,OV

UV, OV Current

V = 0.5V

0±1

μA

IREV

REV Current

VREV = 1V

710

μA

IOUT

OUT Current

VOUT = 0V, 12V

–13

200

μA

ISOURCE

SOURCE Current

VSOURCE = 0V

–85

–130

μA

ICPO(UP)

CPO Pull-Up Current

VCPO = VIN = 2.9V

VCPO = VIN = 18V

–60

–50

–90

–75

–115

–100

μA

IGATE

GATE Fast Pull-Up Current

GATE Fast Pull-Down Current

GATE Off Pull-Down Current

VFWD = 0.2V, ΔVGATE = 0V, VCPO = 17V

VFWD = –0.2V, ΔVGATE = 5V

VUV = 0V, ΔVGATE = 2.5V

–1.5

1.5

100

145

μA

IFLT,STAT(IN)

STATUS, FAULT Leakage Current

V = 18V

0±1

μA

IFLT,STAT(UP)

STATUS, FAULT Pull-Up Current

V = 0V

–8

–10

–12

μA

VOL

STATUS, FAULT Output Low Voltage

I = 1.25mA

0.2

0.4

VOH

STATUS, FAULT Output High Voltage

I = –1μA

VCC – 1 VCC – 0.5

ΔVGATE(ST)

MOSFET On Detect Threshold

STATUS Pulls Low, VFWD = 50mV

0.3

0.7

1.1

VFWD(FLT)

Open MOSFET Threshold (VIN – VOUT)

FAULT Pulls Low

200

250

300

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating 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 GATE and CPO pins to a minimum of 5V

above, and a diode below SOURCE. Driving these pins to voltages beyond

the clamp may damage the device.

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