Dual, 3A, 2MHz Step-Down Regulator

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3

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

REFIN, SS2

90

500

REFIN Input Bias Current

65

nA

0

1.65

REFIN Common-Mode Range

0

1.70

V

LX1, LX2 (All Pins Combined)

40

55

LX_ On-Resistance, High

42

m

Ω

35

54

LX_ On-Resistance, Low

37

m

Ω

LX_ Current-Limit Threshold

High-side sourcing and freewheeling

4.6

5.5

6.4

A

10

-0.1

-10

LX_ Leakage Current

-0.1

µA

Ω

0.9

1.0

1.1

LX_ Switching Frequency

Ω

1.80

2.0

2.2

MHz

LX_ Minimum Off-Time

50

ns

LX_ Minimum On-Time

95

ns

LX_ Maximum Duty Cycle

Ω

90

95

%

Maximum LX_ Output Current

3

EN1, EN2

EN_ Logic-Low

0.7

V

EN_ Logic-High

1.7

V

-1

+1

EN_ Input Current

0.01

µA

SS1, SS2

SS_ Charging Current

5

8

11

µA

REFIN, SS2

Discharge Resistance

In shutdown or a fault condition

335

Ω

THERMAL SHUTDOWN

Thermal-Shutdown Threshold

(Independent Channels)

+165

°C

Thermal-Shutdown Hysteresis

20

°C

ELECTRICAL CHARACTERISTICS (continued)