RT8009 Ver la hoja de datos (PDF) - Richtek Technology

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RT8009

1.25MHz, 600mA, High Efficiency PWM Step-Down DC/DC Converter

Richtek Technology 

RT8009

Typical Operating Characteristics

Efficiency vs. Load Current

100

VIN = 3.3V

90

80

70 VIN = 5V

60

50

40

30

20

10

VOUT = 1.8V

0

0.01 0.11 0.21 0.31 0.41 0.51 0.61

Load Current (A)

1.810

Load Regulation

1.805

1.800

1.795

VIN = 5.5V

VIN = 3.3V

1.790

1.785

VIN = 2.5V

1.780

1.775

VOUT = 1.8V

1.770

0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6

Load Current (A)

Frequency vs. Input Voltage

1.26

1.24

1.22

1.20

1.18

1.16

VOUT = 1.8V

1.14

2.5 2.8 3.1 3.4 3.7 4 4.3 4.6 4.9 5.2 5.5

Input Voltage (V)

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6

Efficiency vs. Input Voltage

100

90

80

70

IOUT = 300mA IOUT = 600mA

60

50

40

30

20

10

VOUT = 1.8V

0

2.5 2.8 3.1 3.4 3.7 4 4.3 4.6 4.9 5.2 5.5

Input Voltage (V)

Current Limit vs. Input Voltage

2.50

2.25

2.00

1.75

1.50

1.25

1.00

0.75

0.50

0.25

VOUT = 1.8V

0.00

2.5 2.8 3.1 3.4 3.7 4 4.3 4.6 4.9 5.2 5.5

Input Voltage (V)

Frequency vs. Temperature

1.26

1.24

1.22

1.20

1.18

1.16

1.14

1.12

1.10

VIN = 3.3V, VOUT = 1.8V

-50 -25 0

25 50 75

Temperature (°C)

100 125

DS8009-03 March 2007

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