RT8253BLGSP Ver la hoja de datos (PDF) - Richtek Technology

Número de pieza

componentes Descripción

Fabricante

RT8253BLGSP

3A, 23V, 1.2MHz Synchronous Step-Down Converter

Richtek Technology 

RT8253B

8.0

7.5

7.0

6.5

6.0

5.5

5.0

4.5

4.0

0

Current Limit vs. Duty Cycle

10 20 30 40 50 60 70 80

Duty Cycle (%)

8.0

7.5

7.0

6.5

6.0

5.5

5.0

4.5

4.0

-50

Current Limit vs. Temperature

VIN = 12V, VOUT = 3.3V

-25

0

25 50 75 100 125

Temperature (°C)

Output Current Limit vs. Input Voltage

6

5

VOUT

(50mV/Div)

VOUT = 1.2V

4

VOUT = 3.3V (Add Bootstrap Diode)

VOUT = 3.3V

3

2

IOUT

(2A/Div)

1

0

4 6 8 10 12 14 16 18 20 22 24

Input Voltage (V)

Load Transient Response

Load Transient Response

VIN = 12V, VOUT = 3.3V, IOUT = 0.3A to 3A

Time (100μs/Div)

Switching

VOUT

(50mV/Div)

IOUT

(2A/Div)

VOUT

(5mV/Div)

VSW

(10V/Div)

VIN = 12V, VOUT = 3.3V, IOUT = 1.5A to 3A

Time (100μs/Div)

IL

(2A/Div)

VIN = 12V, VOUT = 3.3V, IOUT = 3A

Time (500ns/Div)

DS8253B-02 March 2011

www.richtek.com

7

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