RT8062GSP Ver la hoja de datos (PDF) - Richtek Technology

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componentes Descripción

Fabricante

RT8062GSP

2A, 2MHz, Synchronous Step-Down Converter

Richtek Technology 

RT8062

Typical Application Circuit

VIN

2.7V to 5.5V

CIN

10µF

4

RT8062

VIN

LX

5, 6

3 EN

FB 8

COMP 1

L

RCOMP

ROSC 7 RT

GND 2,

9 (Exposed Pad)

R1

R2

CCOMP

VOUT

COUT

Note : Using all Ceramic Capacitors

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

2.0

51

24

22

560

2.0

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.

Pin Name

Pin Function

Error Amplifier Compensation Point. The current comparator threshold increases

1

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.

DS8062-07 November 2012

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