LTC4367 datasheet(3/32 Pages) AD

3 / 32 page

LTC7862

Rev 0

For more information www.analog.com

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input Supply Operating Voltage Range

(Note 9) DRVUV = 0V

140

VOUT

Regulated Output Clamp Voltage Set Point

VFB

Regulated Feedback Voltage

(Note 4); ITH Voltage = 1.2V

0°C to 85°C

0.792

0.788

0.800

0.808

0.812

IFB

Feedback Current

(Note 4)

–0.006

±0.050

µA

Feedback Voltage Line Regulation

(Note 4) VIN = 4.5V to 150V

0.002

0.02

%/V

Feedback Voltage Load Regulation

(Note 4) Measured in Servo Loop,

∆ITH Voltage = 1.2V to 0.7V

0.01

0.1

(Note 4) Measured in Servo Loop,

∆ITH Voltage = 1.2V to 1.6V

–0.01

–0.1

Transconductance Amplifier gm

(Note 4) ITH = 1.2V, Sink/Source 5µA

mmho

Input DC Supply Current

(Note 5) VFB = 0.77V

1.2

Shutdown

RUN = 0V

µA

UVLO

Undervoltage Lockout

DRVCC Ramping Up

DRVUV = 0V

DRVUV = INTVCC

4.0

7.5

4.2

7.8

DRVCC Ramping Down

DRVUV = 0V

DRVUV = INTVCC

3.6

6.4

3.8

6.7

4.0

7.0

VRUN ON

RUN Pin ON Threshold

VRUN Rising

1.1

1.2

1.3

VRUN Hyst

RUN Pin Hysteresis

OVLO

Overvoltage Lockout Threshold

VOVLO Rising

1.1

1.2

1.3

OVLO Hyst

OVLO Hysteresis

100

OVLO Delay

µs

Feedback Overvoltage Protection

Measured at VFB, Relative to Regulated VFB

ISENSE+

SENSE+ Pin Current

±1

µA

ISENSE–

SENSE– Pin Current

SENSE+ = SENSE– = 28V

900

µA

Maximum TG Duty Factor

In Dropout

100

ISS

Soft-Start Charge Current

VSS = 0V

µA

VSENSE(MAX) Maximum Current Sense Threshold

VFB = 0.7V, VSENSE– = 28V

The l denotes the specifications which apply over the specified operating

junction temperature range, otherwise specifications are at TA = 25°C (Note 2), VIN = 12V, VRUN = 5V, VEXTVCC = 0V, VDRVUV = 0V

unless otherwise noted.

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