Compact, High-Efficiency, Dual-Output

Step-Up DC-DC Converter

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3

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

LX Leakage Current

0.1

1

µA

ON Input Low Voltage

400

mV

ON Input High Voltage

1.6

V

ON Input Bias Current

1µA

LCD OUTPUT

LXLCD Voltage

28

V

LXLCD On-Resistance

1.1

2.0

Ω

LXLCD Current Limit

0.28

0.5

0.7

A

LXLCD Leakage Current

0.1

1

µA

FBLCD Regulation Voltage

1.20

1.25

1.30

V

FBLCD Input Bias Current

50

nA

LCD Line Regulation

0.1

%

LCD Load Regulation

0.5

%

Maximum LXLCD On-Time

4

9

14

µs

≥ 1.2V

0.5

1

1.5

Minimum LXLCD Off-Time

≤ 0.7V

2.4

5

7.5

µs

ONLCD Input Low Voltage

400

mV

ONLCD Input High Voltage

1.6

V

ONLCD Input Bias Current

1µA

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

MAX

UNITS

GENERAL

Input Voltage Range

1.5

5.5

V

Startup Voltage

1.7

V

Quiescent Current from OUT

(Main Only)

10

µA

Quiescent Current from OUT

30

µA

Shutdown Quiescent Current

1

µA

MAIN OUTPUT

2.4

OUT Undervoltage Lockout

1.95

V

Fixed-Mode Output Voltage

≤ 45mV

3.14

3.47

V

Adjustable-Mode FB Regulation

Voltage

1.20

1.30

V

FB Input Bias Current

50

nA