®
RT6258D
8A, 23V Synchronous Step-Down Converter with 5V LDO
General Description
Features
The RT6258Dis an advanced constant on-time (ACOTTM)
mode synchronous buck converter. The main control loop
of the RT6258D uses an advanced constant on-time
(ACOTTM) mode control which provides a very fast transient
response. The RT6258D operates from 5.1V to 23V input
voltage.
5.1V to 23V Input Voltage Range 8A Output Current
ACOTTM Mode Performs Fast Transient Response
ACOTTM Architecture to Enable All MLCC Output
Capacitor Usage
Fixed 750kHz Switching Frequency
High Efficient Internal Power MOSFET Switch-
20mΩ (High-Side) and 10mΩ (Low-Side)
Fixed 5V LDO Output Supply 100mA
Pre-biased Soft-Start
Applications
Industrial and Commercial Low Power Systems
Cycle-by-Cycle Over-Current Protection
Input Under-Voltage Lockout
Computer Peripherals
LCDMonitors and TVs
Thermal Shutdown Protection
Green Electronics/Appliances
Point of Load Regulation for High-Performance DSPs,
FPGAs, and ASICs
Output Over-/Under-Voltage Protection
Ultrasonic Mode (USM)
Pin Configuration
Ordering Information
RT6258D
(TOP VIEW)
Package Type
QUF : UQFN-12HL 3x3 (FC) (U-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
12 11 10
1
9
8
7
6
BOOT
LX
EN
Note :
5
VIN
2
3
Richtek products are :
4
PGND
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
LX
UQFN-12HL 3x3 (FC)
Marking Information
MQ= : Product Code
YMDNN : Date Code
MQ=YM
DNN
Copyright 2019 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS6258D-00 January 2019
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
