RT5797B
3A, 1MHz, 6V CMCOT Synchronous Step-Down Converter
General Description
Features
⚫ Efficiency Up to 95%
The RT5797B is a high efficiency synchronous step-
down DC-DC converter. Its input voltage range is from
2.7V to 6V and provides an adjustable regulated output
voltage from 0.6V to 3.4V while delivering up to 3A of
output current.
⚫ R
100m HS / 70m LS
DSON
⚫ V Range 2.7V to 6V
IN
⚫ V
0.6V with 1% Accuracy at 25C
REF
⚫ CMCOT™ Control Loop Design for Best
Transient Response, Robust Loop Stability with
The internal synchronous low on-resistance power
switches increase efficiency and eliminate the need for
an external Schottky diode. The Current Mode
Constant-On-time (CMCOT) operation with internal
compensation allows the transient response to be
optimized over a wide range of loads and output
capacitors. The RT5797B is available in the WDFN-8L
2x2 package.
Low-ESR (MLCC) C
OUT
⚫ Soft-Start 1.2ms
Applications
⚫ STB, Cable Modem, & xDSL Platforms
⚫ LCD TV Power Supply & Metering Platforms
⚫ General Purpose Point of Load (POL)
Ordering Information
RT5797B
Marking Information
Package Type
QW : WDFN-8L 2x2 (W-Type)
RT5797BLGQW
2S : Product Code
W : Date Code
Lead Plating System
2SW
G : Green (Halogen Free and Pb Free)
UVP Option
H : Hiccup
L : Latched-Off
RT5797BHGQW
2T : Product Code
W : Date Code
Note :
2TW
Richtek products are :
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Simplified Application Circuit
RT5797B
L
V
IN
LX
V
OUT
VIN
C
IN
C
R1
R2
EN
PG
OUT
FB
SGND PGND
Copyright © 2022 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS5797B-06
April 2022
www.richtek.com
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