RT8057A データシートの表示（PDF） - Richtek Technology

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RT8057A

2.25MHz 1A Synchronous Step-Down Converter

Richtek Technology 

Typical Operating Characteristics

100

90

80

70

60

50

40

30

20

10

0

0.0

Efficiency vs. Output Current

VIN = 5V

VIN = 3.3V

VOUT = 2.3V

0.2

0.4

0.6

0.8

1.0

Output Current (A)

2.40

2.35

2.30

2.25

2.20

2.15

2.10

2.05

2.00

2.5

Frequency vs. Input Voltage

VIN = 5V, VOUT = 2.3V,

IOUT = 0.2A

3.0

3.5

4.0

4.5

5.0

5.5

Input Voltage (V)

Output Current Limit vs. Input Voltage

1.6

1.5

1.4

1.3

1.2

1.1

VOUT = 2.3V

1.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Input Voltage (V)

DS8057A-00 March 2011

RT8057A

Output Voltage vs. Input Voltage

2.38

2.36

2.34

2.32

2.30

2.28

2.26

2.24

2.22

VOUT = 2.3V, IOUT = 0A

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Input Voltage (V)

2.30

2.25

2.20

2.15

2.10

2.05

2.00

1.95

1.90

-50

Frequency vs. Temperature

VIN = 3.3V

VIN = 5V

VOUT = 2.3V, IOUT = 0.2A

-25 0

25 50 75 100 125

Temperature (°C)

Output Current Limit vs. Temperature

1.6

1.5

1.4

1.3

1.2

1.1

1.0

-50 -25

VIN = 5V, VOUT = 2.3V

0

25 50 75

Temperature (°C)

100 125

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