RT8063GSP Ver la hoja de datos (PDF) - Richtek Technology

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componentes Descripción

Fabricante

RT8063GSP

3A, 2MHz, Synchronous Step-Down Converter

Richtek Technology 

RT8063

Typical Application Circuit

VIN

2.7V to 5.5V

CIN

10µF

4

RT8063

VIN

LX

5, 6

3 EN

FB 8

COMP 1

L

RCOMP

ROSC 7 RT

GND 2,

9 (Exposed Pad)

R1

R2

CCOMP

Note : Using all Ceramic Capacitors

VOUT

COUT

VOUT (V)

3.3

2.5

1.8

1.5

1.2

1.0

Table 1. Recommended Components Selection for fSW = 1MHz

R1 (kΩ)

R2 (kΩ)

RCOMP (kΩ) CCOMP (pF)

L (μH)

75

24

33

560

2

51

24

22

560

2

30

24

15

560

1.5

21

24

13

560

1.5

12

24

11

560

1.5

6

24

8.2

560

1.5

COUT (μF)

22

22

22

22

22

22

Functional Pin Description

Pin No.

1

Pin Name

Pin Function

Error Amplifier Compensation Point. The current comparator threshold increases

COMP with this control voltage. Connect external compensation elements to this pin to

stabilize the control loop.

2,

GND

9 (Exposed Pad)

Ground. The exposed pad must be soldered to a large PCB and connected to GND

for maximum power dissipation.

Enable Control Input. Float or connect this pin to logic high for enable. Connect to

3

EN

GND for disable.

4

VIN

Power Input Supply. Decouple this pin to GND with a capacitor.

5, 6

LX

7

RT

8

FB

Internal Power MOSFET Switches Output. Connect these pins to the inductor

together.

Oscillator Resistor Input. Connecting a resistor from this pin to GND sets the

switching frequency. If this pin is floating, the frequency will be set at 2MHz

internally.

Feedback. Receives the feedback voltage from a resistive divider connected across

the output.

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

www.richtek.com

2

is a registered trademark of Richtek Technology Corporation.

DS8063-07 November 2012

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