MAX6771 datasheet(4/22 Pages) MAXIM

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Automotive Micropower Linear Regulators

with Supervisor

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ELECTRICAL CHARACTERISTICS (continued)

(VIN = 14V, CIN = 0.1µF, COUT = 10µF, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = TJ = +25°C.)

(Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

L/T/Z/W, SET = resistive divider, RESET

falling

VOUT x

0.9

VOUT x

0.925

VOUT x

0.950

RESET Threshold (Adjustable

Output Voltage)

M/S/Y/V, SET = resistive divider, RESET

falling

VOUT x

0.85

VOUT x

0.875

VOUT x

0.900

RESETIN Input Current

RESETIN = GND or 12V

-100

+100

VTH = 87.5% of VSET (M/S/Y/V),

RESET falling

1.057

1.085

1.112

RESETIN Threshold

VTH = 92.5% of VSET (L/T/Z/W),

RESET falling

1.118

1.147

1.176

OUT to RESET Delay

VOUT falling

0.3

µs

RESETIN To RESET Delay

RESETIN falling

µs

2.187

3.125

4.063

8.75

12.5

16.25

RESET Timeout Period (TIMEOUT

Connected to OUT)

VOUT rising

140

200

260

TIMEOUT Ramp Current

800

1000

1200

TIMEOUT Ramp Threshold

1.160

1.22

1.259

VOUT

≥ 1.8V, ISINK = 50µA,

RESET asserted

0.3

RESET Output-Voltage Low

(Open Drain or Push-Pull)

VOL

VOUT

≥ 1.8V, ISINK = 3.2mA,

RESET asserted

0.4

RESET Output-Voltage High

(Push-Pull)

VOH

VOUT

≥ 1.8V, ISOURCE = 250µA,

RESET not asserted

0.8 x

VOUT

RESET Open-Drain Leakage

Current

RESET not asserted, RESET = 12V

100

Watchdog Minimum Input Pulse

tWDI

1.8V

≤ VOUT ≤ 11V

µs

Watchdog Input Low Voltage

VIL

1.8V

≤ VOUT ≤ 11V

0.4

Watchdog Input High Voltage

VIH

1.8V

≤ VOUT ≤ 11V

VOUT

- 0.4V

Watchdog Input Low Voltage

VIL

1.8V

≤ VOUT ≤ 11V

0.4

Watchdog Input Current

IWDI

WDI = 0V or WDI = 12V

-1

µA

MAX6773/MAX6774

1.12

1.6

2.08

Watchdog Timeout Period

tWD

MAX6773B/MAX6774B

Note 1: Production tested at TA = +25°C. Overtemperature limits are guaranteed by design.

Note 2: Device tested at internally set voltage.

Note 3: Dropout voltage for L/M versions is defined as (VIN - VOUT) when VOUT equals 98% of the nominal value of VOUT when

VIN = 11V. For T/S versions, dropout voltage is defined as (VIN - VOUT) when VOUT equals 98% of the nominal value of VOUT

when VIN = 9.3V.

Note 4: Observe the absolute maximum power dissipation limits.

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