3

LTC1878

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The LTC1878E is guaranteed to meet performance specifications

from 0

°C to 70°C. Specifications over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Peak Inductor Current

0.8

1.0

1.25

A

SW Leakage

±0.01

±1

µA

q

0.3

1.0

1.5

V

SYNC/MODE Leakage Current

±0.01

±1

µA

RUN Threshold

q

0.3

0.7

1.5

V

RUN Input Current

±0.01

±1

µA

Note 5: Dynamic supply current is higher due to the gate charge being

delivered at the switching frequency.

ELECTRICAL CHARACTERISTICS

TYPICAL PERFOR A CE CHARACTERISTICS

Efficiency vs Input Voltage

INPUT VOLTAGE (V)

2

75

80

85

5

7

1878 G01

70

65

60

34

6

90

95

100

8

Burst Mode OPERATION

L = 10

µH

OUTPUT CURRENT (mA)

30

90

100

20

10

80

50

70

60

40

0.1

10

100

1000

1878 G02

0

1

PULSE SKIPPING MODE

Burst Mode OPERATION

L = 10

µH

OUTPUT CURRENT (mA)

60

70

75

85

95

0.1

10

100

1000

1878 G03

50

1

80

65

55

90

L = 15

µH

L = 10

µH

Burst Mode OPERATION

Efficiency vs Output Current

Efficiency vs Output Current