40V, 600mA Buck Converters with Low-

Quiescent-Current Linear Regulator Mode

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5

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

EN Low-Voltage Threshold

Regulator off

0.4

V

EN Input Pulldown

0.5

µA

RESET Voltage Threshold High

89

92

94

RESET Voltage Threshold Low

87

90

92

RESET Output-Low Voltage

0.2

V

RESET Output-High Leakage

Current

1

µA

RESET Output Minimum Timeout

Period

25

µs

6

µs

Delay Comparator Threshold

1.18

1.2374

1.29

V

Delay Comparator Threshold

Hysteresis

100

mV

CT Charge Current

0.74

1

1.20

µA

CT Discharge Current

13.8

mA

THERMAL SHUTDOWN

Thermal Shutdown Temperature

Temperature rising

+165

°C

Thermal Shutdown Hysteresis

20

°C

Note 1: Limits to -40°C are guaranteed by design.

Note 2: The continuous maximum output current from LDO is limited by package power dissipation.