MAX791 datasheet(5/20 Pages) MAXIM

Part #	MAX791

Description	Microprocessor Supervisory Circuit

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Manufacturer	MAXIM [Maxim Integrated Products]

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Microprocessor Supervisory Circuit

58

38

-60

-30

30

150

VCC SUPPLY CURRENT vs. TEMPERATURE

(NORMAL OPERATING MODE)

42

54

TEMPERATURE (°C)

0

120

90

60

46

50

VCC = +5V

VBATT = 2.8V

PFI, CE IN = 0V

4.80

4.30

4.40

4.35

-60

-30

30

150

RESET THRESHOLD

vs. TEMPERATURE

TEMPERATURE (°C)

0

120

90

60

4.45

4.50

4.55

4.60

4.65

4.70

4.75

VBATT = 0V,

POWER DOWN

600

0

100

-60

-30

30

150

RESET OUTPUT RESISTANCE

vs. TEMPERATURE

TEMPERATURE (°C)

0

120

90

60

200

300

400

500

VCC = 0V, VBATT = 2.8V

SINKING CURRENT

VCC = +5V, VBATT = 2.8V

SOURCING CURRENT

230

170

180

-60

-30

30

150

RESET DELAY

vs. TEMPERATURE

TEMPERATURE (°C)

0

120

90

60

190

200

210

220

VCC = 0V TO 5V STEP

VBATT = 2.8V

__________________________________________Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

20

5

-60

-30

30

150

VBATT-to-VOUT ON-RESISTANCE

vs. TEMPERATURE

TEMPERATURE (°C)

0

120

90

60

10

15

VBATT = 2.0V

VBATT = 2.8V

VBATT = 4.5V

VCC = 0V

2

0

-60

-30

30

150

BATTERY SUPPLY CURRENT vs. TEMPERATURE

(BATTERY-BACKUP MODE)

0.5

TEMPERATURE (°C)

0

120

90

60

1

1.5

VCC = 0V

VBATT = 2.8V

NO LOAD

120

40

-60

-30

30

150 180

CHIP-ENABLE ON-RESISTANCE

vs. TEMPERATURE

60

TEMPERATURE (°C)

0

120

90

60

80

100

VCC = +4.75V

VBATT = 2.8V

CE IN = VCC/2

1.2

0.6

0.7

-60

-30

30

150

VCC-to-VOUT ON-RESISTANCE

vs. TEMPERATURE

TEMPERATURE (°C)

0

120

90

60

0.8

0.9

1.0

1.1

VCC = +5V,

VBATT = 0V

1.50

0

0.25

-60

-30

30

150

PFI THRESHOLD

vs. TEMPERATURE

TEMPERATURE (°C)

0

120

90

60

0.50

0.75

1.00

1.25

VCC = +5V,

VBATT = 0V,

NO LOAD ON PFO

_______________________________________________________________________________________

5

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