Low-Power Battery Backup

Circuits in Small µDFN Packages

6

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Typical Operating Characteristics (continued)

BATTERY SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

4.5

4.0

3.0 3.5

1.0 1.5 2.0 2.5

0.5

0

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

-0.25

0

5.0

RESETIN THRESHOLD

vs. TEMPERATURE

TEMPERATURE (°C)

60

35

-15

10

1.215

1.220

1.225

1.230

1.235

1.240

1.245

1.250

1.210

-40

85

MAX16036/

MAX16040

RESETIN-TO-RESET PROPAGATION

DELAY vs. TEMPERATURE

TEMPERATURE (°C)

60

35

-15

10

1.3

1.5

1.8

2.0

2.3

2.5

2.8

3.0

1.0

-40

85

MAX16036/

MAX16040

CEIN PROPAGATION DELAY

vs. CEOUT LOAD CAPACITANCE

CEOUT LOAD CAPACITANCE (pF)

150

125

100

75

50

25

0.5

1.0

1.5

2.0

2.5

3.0

0

0175

CEIN TO CEOUT ON-RESISTANCE

vs. TEMPERATURE

TEMPERATURE (°C)

60

35

10

-15

5

10

15

20

25

30

35

0

-40

85

PFI-TO-PFO DELAY

vs. TEMPERATURE

TEMPERATURE (°C)

60

35

10

-15

3.25

3.50

4.00

3.75

4.25

4.50

2.25

2.75

2.50

3.00

4.75

5.00

2.00

-40

85

FALLING EDGE

PFI THRESHOLD

vs. TEMPERATURE

TEMPERATURE (°C)

60

35

-15

10

1.215

1.220

1.225

1.230

1.235

1.240

1.245

1.250

1.210

-40

85

WATCHDOG TIMEOUT PERIOD

vs. TEMPERATURE

TEMPERATURE (°C)

60

35

10

-15

1.4

1.5

1.6

1.7

1.8

1.1

1.2

1.3

1.9

2.0

1.0

-40

85