RT8010 datasheet(2/15 Pages) RICHTEK

2 / 15 page

RT8010/A

DS8010/A-02 March 2007

www.richtek.com

Typical Application Circuit

Figure 1. Fixed Voltage Regulator

Figure 2. Adjustable Voltage Regulator

⎟

⎠

⎞

⎜

⎝

⎛ +

REF

OUT

with R2 = 300k

Ω to 60kΩ so the IR2 = 2μA to 10μA,

and (R1 x C1) should be in the range between 3x10-6 and 6x10-6 for component selection.

Figure 3

Layout note:

1. The distance that CIN connects to VIN is as close as possible (Under 2mm).

2. COUT should be placed near RT8010/A.

Layout Guide

4.7uF

10uF

VIN

RT8010/A

VOUT

2.2uH

2.5V to 5.5V

VIN

VOUT

CIN

COUT

GND

4.7uF

10uF

VIN

RT8010/A

2.2uH

2.5V to 5.5V

VIN

VOUT

CIN

COUT

IR2

GND

VIN

GND

RT8010/A_ADJ

CIN must be placed

between VDD and

GND as closer as

possible

LX should be

connected to

Inductor by wide

and short trace,

keep sensitive

compontents away

from this trace

Output

capacitor

must be near

RT8010/A

COUT

CIN

VIN

GND

COUT

CIN

RT8010/A_FIX

CIN must be placed

between VDD and

GND as closer as

possible

LX should be connected

to Inductor by wide and

short trace, keep

sensitive compontents

away from this trace

Output capacitor

must be near

RT8010

6 VOUT

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