AIC1899 데이터 시트보기 (PDF) - Analog Intergrations

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AIC1899

1.0MHz Current-Mode Step-Up DC/DC Converter

Analog Intergrations 

AIC1899

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

1.10

TA=25oC

1.05

1.00

0.95

0.90

2.5

3.0

3.5

4.0

4.5

5.0

5.5

SUPPLY VOLTAGE(V)

Fig. 8 Frequency vs. Supply Voltage

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

1.1

1.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

SUPPLY VOLTAGE (V)

Fig. 9 RDS-ON vs. Supply Voltage

1.4

85

FB=1.0V

1.2

SHDN=1.0V

80

1.0

0.8

0.6

2.5

3.0

3.5

4.0

4.5

5.0

5.5

SUPPLY VOLTAGE (V)

Fig. 10 Switching Current

FB=1.3V

75

SHDN=1.0V

70

65

2.5

3.0

3.5

4.0

4.5

5.0

5.5

SUPPLY VOLTAGE (V)

Fig. 11 Non-Switching Current

VOUT

VLX

IL

Fig. 12 Operation Waveform

(VIN=3V; VOUT=15V, IOUT=15mA, Test circuit as Fig.1)

VSHDN

VOUT

VLX

Fig. 13 Start-up Waveform

(VIN=3V; VOUT=15V, IOUT=15mA, Test circuit as Fig.1)

5

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