RT9921PQV Просмотр технического описания (PDF) - Richtek Technology

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RT9921PQV

Integrated Multi-Channel DC-DC Converter for TFT LCD Panels

Richtek Technology 

RT9921

Preliminary

Typical Operating Characteristics

Boost Efficiency vs. Output Current

100

90

80

VIN = 5V

70

VIN = 4V

VIN = 3V

60

50

40

30

20

10

0

0

VOUT = 8.5V, FSW = 1.2MHz

50

100 150 200 250 300

Output Current (mA)

Boost Output Voltage vs. Output Current

8.6

8.59

8.58

8.57

8.56

8.55

8.54

VIN = 3V

VIN = 4V

VIN = 5V

8.53

8.52

8.51

8.5

0

FSW = 1.2MHz

50

100 150 200 250 300

Output Current (mA)

Boost Output Voltage vs. Input Voltage

8.6

8.59

8.58

8.57

8.56

8.55

8.54

IOUT = 100mA

IOUT = 200mA

IOUT = 300mA

8.53

8.52

8.51

FSW = 1.2MHz

8.5

2.5

3

3.5

4

4.5

5

5.5

Input Voltage (V)

1.247

VFB vs. Temperature

1.2451

1.2432

1.2413

1.2394

http://www.DataSheet4U.net/

1.2375

1.2356

1.2337

1.2318

No Load

1.2299

-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 85

Temperature (°C)

LDO Dropout Voltage vs. Output Current

700

600

85°C

500

25°C

400

-40°C

300

200

100

0

0

VOUT = 2.5V

50 100 150 200 250 300 350

Output Current (mA)

LDO Output Voltage vs. Output Current

2.5

2.48

2.46

2.44

2.42

VIN = 3V

VIN = 4V

VIN = 5V

2.4

0

50

100 150 200 250 300

Output Current (mA)

www.richtek.com

8

DS9921-00 November 2007

datasheet pdf - http://www.DataSheet4U.net/

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