L2800

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

4 of 7

www.unisonic.com.tw

QW-R103-030.C



PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP MAX UNIT

CIRCUIT TO PREVENT MALFUNCITION AT LOW INPUT OLTAGE (U.V.L.O)

Reset Voltage

0.9

V

Threshold Voltage

1.1

1.3

1.5

V

Soft Start

Charging Current

-1.5

-1.0

-0.7

μA

Voltage at soft start completion

0.7

0.8

0.9

V

Short Circuit Detection(S.C.P.)

Charging Current

-1.5

-1.0

-0.7

μA

Threshold Voltage

0.7

0.8

0.9

V

SAWTOOTH WAVE OSCILLATOR(OSC)

Oscillation Frequency

400

500

600

kHz

Frequency Input Stability

2

10

%

Frequency Variation With Temperature

5

%

ERROR AMPLIFIER

Input Threshold Voltage

480

500

520

mV

5

20

mV

1

%

Input Bias Current

-1.0

-0.2

1.0

μA

Voltage Gain

Av

70

100

145

V/V

Frequency Bandwidth

BW

6

MHz

Maximum Output Voltage Range

+

0.78

0.87

V

-

0.05

0.2

V

Output Source Current

+

-40

-24

μA

Output Sink Current

-

24

40

μA

IDLE PERIOD ADJUSTMENT SECTION

Maximum Duty Cycle

65

75

85

%

OUTPUT SECTION

Output Voltage

1.0

1.2

V

0.8

1.0

V

0.1

0.2

V

0.1

0.2

V

Output Source Current

+

-30

-20

mA

Output Sink Current

-

30

60

mA

Pull Down Resistance

20

30

40

kΩ

OUTPUT CURRENT SETTING SECTION/CONTROL SECTION

Pin Voltage

0.2

0.3

0.4

V

Input Off Condition

-20

0

μA

Input On Condition

-45

μA

Pin Current Range

-1.8

-0.1

mA

ENTIRE DEVICE

Stand-by Current

1

μA

Average Supply Current

5.5

9.3

mA