RT5753

13

DS5753-05 November 2023

www.richtek.com

©

Copyright 2023 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Typical Application Circuit

Table 2. Suggested Component Values

VOUT (V)

RFB1 (k)

RFB2 (k)

CIN1 (F)

L (

H)

COUT (F)

CFF (pF)

3.3

100

22.1

22

1 

44 to 66 

--

1.8

100

50

22 

1 

44 to 66 

‐‐ 

1.5

100

66.6

22 

1 

44 to 66 

‐‐ 

1.2

100

100

22 

1 

44 to 66 

22 

1.05

100

133

22 

1 

44 to 66 

22 

1

100

148

22 

1 

44 to 66 

22 

 

 

Component

Description

Vendor P/N

CIN

22

F, 6.3V, X5R, 0603

GRM188R60J226MEA0D (MURATA)

COUT

22

F, 6.3V, X5R, 0603

GRM188R60J226MEA0D (MURATA)

L

1

H

DFE322512F-1R0M (MURATA)

COUT and CIN : Considering the effective capacitance de-rated with biased voltage level and size, the COUT and CIN

components need to satisfy the effective capacitance which corresponding to recommended external

components.

Table 3. Recommended External Components

FB

PGND

AGND

PG

VIN

EN

SW

VOUT

VIN

L

CIN1

RT5753

RFB1

RFB2

COUT

VPG

3

7

2

8

4, 9 (Exposed pad)

1

6

Chip Enable

CFF*: Optional for performance fine-tune

CIN2

0.1μF

CFF*

RPG

100k