LTC7825

4

Rev. A

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SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IHYS_PRGM

HYS_PRGM Setting Current

9

10

11

µA

VVLOW_FAULT

(LTC7825)

VLOW Voltage Fault Level

VVHIGH = 12V, VHYS_PRGM = 1V

VVLOW Ramping Up

VVLOW Ramping Down

6.2

5.8

V

V

VVHIGH = 16V, VHYS_PRGM = INTVCC

VVLOW Ramping Up

VLOW Ramping Down

8.4

7.6

V

V

VVHIGH = 8V, VHYS_PRGM = 0V

VVLOW Ramping Up

VVLOW Ramping Down

4.24

3.76

V

V

OVG

VOVG_VHIGH

OVG to VHIGH

OVG On

4

V

VOV

VHIGH Overvoltage Threshold

VHIGH Rising

26

V

VOV_HYS

VHIGH Overvoltage Hysteresis

Hysteresis

3.2

V

TIMER Current

ITIMER

VTIMER < 0.5V or VTIMER > 1V

4

µA

0.5V < VTIMER < 1V

8

µA

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: The LTC7825A is specified over the –40C to 125C operating

junction temperature range. High junction temperatures degrade operating

lifetimes. Note the maximum ambient temperature consistent with

these specifications is determined by specific operating conditions in

conjunction with board layout, the rated package thermal impedance and

other environmental factors.

Note 3: TJ is calculated from the ambient temperature TA and power

dissipation PD according to the following formula: TJ = TA + (PD • JA).

Note 4: All currents into device pins are positive; all currents out of

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

otherwise specified.

Note 5: When VCC > 6V, EXTVCC is recommended to reduce

IC Temperature.

Note 6: EXTVCC is enabled only if VCC is higher than 6V.

ELECTRICAL CHARACTERISTICS The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 12V, VRUN = 5V, unless otherwise specified. (Note 2)