100

0

1

10

100

1000

10,000

MAIN OUTPUT EFFICIENCY vs. LOAD

20

LOAD (mA)

40

60

80

70

50

30

10

90

90

0

1

1000

100

10

CORE OUTPUT EFFICIENCY vs. LOAD

30

10

70

50

100

40

20

80

60

LOAD (mA)

-2.0

-1.5

-1.0

-0.5

0

0.5

1.0

1.5

2.0

-40

-15

10

35

60

85

TEMPERATURE (°C)

Typical Operating Characteristics

Dual-Output Step-Down

DC-DC Converter for PDA/Palmtop Computers

6

_______________________________________________________________________________________

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX

UNITS

LOGIC INPUTS

SHDNM, SHDNC Input Low

Voltage

0.4

V

SHDNM, SHDNC Input High

Voltage

2.0

V

SHDNM, SHDNC Input Low

Current

SHDNM = SHDNC = GND

-1

1

µA

SHDNC Input High Current

5

µA

SHDNM Input High Current

30

µA

ELECTRICAL CHARACTERISTICS (continued)

(Note 2)

Note 1: This parameter is guaranteed based on the LXC P-channel current limit and the LXC N-channel valley current.

Note 2: Specifications to -40°C are guaranteed by design and not production tested.