EEWORLDEEWORLDEEWORLD

Part Number

Search

RT6278A

Description
23V, 8A, 500kHz ACOT® Synchronous Step-Down Converter, Active, 4.5V, 23V, 1, 0.6V, 6V, Resistor
CategoryPower/power management    BuckConv   
File Size322KB,19 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
Download Datasheet Parametric Compare View All

RT6278A Overview

23V, 8A, 500kHz ACOT® Synchronous Step-Down Converter, Active, 4.5V, 23V, 1, 0.6V, 6V, Resistor

RT6278A Parametric

Parameter NameAttribute value
StatusActive
Vin (min)(V)4.5
Vin (max)(V)23
Number of Outputs1
Vout (min)(V)0.6
Vout (max)(V)6
Preset Vout(V)
Output Adj. MethodResis
Iout (max)(A)8
Current Limit (typ)(A)10;12;8
Freq (typ)(kHz)500
Freq (min)(kHz)
Freq (max)(kHz)
Ext SyncN
Ron_HS (typ)(mOhm)24
Ron_LS (typ)(mOhm)12
Iq (typ)(mA)0.13
FeaturesACOT Control;Adjustable Current Limit;Fast Transient Response;OCP;OVP;PSM;Power Good;UVP;Ultrasonic Mode Control
Package TypeUQFN3x3-12H(FC)
®
RT6278A/B
23V, 8A, 500kHz ACOT
TM
Synchronous Step-Down Converter
General Description
The RT6278A/B is a simple, easy-to-use, 8A synchronous
step-down DC-DC converter with an input supply voltage
range of 4.5V to 23V. The device build-in an accurate 0.6V
reference voltage and integrates low R
DS(ON)
power
MOSFETs to achieve high efficiency in a UQFN-12HL 3x3
package. The RT6278A/B adopts Advanced Constant On-
Time (ACOT
TM
) control architecture to provide an ultrafast
transient response with few external components and to
operate in nearly constant switching frequency over the
line, load, and output voltage range. The RT6278A operates
in automatic PSM that maintains high efficiency during
light load operation. The RT6278B operates in Forced
PWM that helps meet tight voltage regulation accuracy
requirements. The RT6278A/B senses both FETs current
for a robust over-current protection. It features cycle-by-
cycle current limit protection and prevent the device from
the catastrophic damage in output short circuit, over current
or inductor saturation. A built-in soft-start function prevents
inrush current during start-up. The device also includes
input under-voltage lockout, output under-voltage
protection, over-voltage protection, and over-temperature
protection (thermal shutdown) to provide safe and smooth
operation in all operating conditions. The RT6278A/B is
offered in a UQFN-12HL 3x3(FC) package.
Features
Ω
Ω
8A Converter With Built-In 24mΩ/12mΩ Low R
DS(ON)
Power FETs
Input Supply Voltage Range : 4.5V to 23V
Output Voltage Range : 0.6V to 6V
Advanced Constant On-Time (ACOT
TM
) Control
½
Ultrafast Transient Response
No Needs For External Compensations
½
Optimized for Low-ESR Ceramic Output Capacitors
0.6V
±
1% High-Accuracy Feedback Reference
½
Voltage
Optional for Operation Modes :
½
Power Saving Mode (PSM) (RT6278A)
½
Forced PWM Mode (RT6278B)
Fixed Switching Frequency : 500kHz
Built-In Internally Fixed Soft-Start (Typ. 0.4ms)
Input Under-Voltage Lockout (UVLO)
Output Under-Voltage Protection (UVP) with Hiccup
Mode
Output Over-Voltage Protection (OVP) with Auto-
Recovery Mode
Ultrasonic Mode (USM) for RT6278A
Available In UQFN-12HL 3x3 (FC) (U-Type) Package
Ordering Information
RT6278A/B
Package Type
QUF : UQFN-12HL 3x3 (FC) (U-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
UVP Option
H : Hiccup
PWM Operation Mode
A : Automatic PSM
B: Forced PWM
Note :
Richtek products are :
½
Applications
Industrial and Commercial Low Power Systems
Computer Peripherals
LCD Monitors and TVs
Green Electronics/Appliances
Point of Load Regulation for High-Performance DSPs,
FPGAs, and ASICs
Networking Communication
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.
½
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6278A/B-01 May 2018
www.richtek.com
1

RT6278A Related Products

RT6278A RT6278B
Description 23V, 8A, 500kHz ACOT® Synchronous Step-Down Converter, Active, 4.5V, 23V, 1, 0.6V, 6V, Resistor 23V, 8A, 500kHz ACOT® Synchronous Step-Down Converter, Active, 4.5V, 23V, 1, 0.6V, 6V, Resistor
Status Active Active
Vin (min)(V) 4.5 4.5
Vin (max)(V) 23 23
Number of Outputs 1 1
Vout (min)(V) 0.6 0.6
Vout (max)(V) 6 6
Output Adj. Method Resis Resis
Iout (max)(A) 8 8
Current Limit (typ)(A) 10;12;8 10;12;8
Freq (typ)(kHz) 500 500
Ext Sync N N
Ron_HS (typ)(mOhm) 24 24
Ron_LS (typ)(mOhm) 12 12
Iq (typ)(mA) 0.13 0.13
Features ACOT Control;Adjustable Current Limit;Fast Transient Response;OCP;OVP;PSM;Power Good;UVP;Ultrasonic Mode Control ACOT Control;Adjustable Current Limit;Fast Transient Response;Force PWM;OCP;OVP;Power Good;UVP
Package Type UQFN3x3-12H(FC) UQFN3x3-12H(FC)
What do you hope to learn in the analog circuit section?
Welcome everyone to discuss and put forward your own views. The forum will provide some relevant information and explanations based on everyone's opinions....
lixiaohai8211 Analog electronics
Research on battery charging method
Abstract: According to the characteristics of batteries, the polarization phenomenon during the charging and discharging process of batteries is studied, several charging methods are proposed and anal...
zbz0529 Embedded System
What does the statement move=(move<<1)|0x01 mean?
I am new to C language, and I am asking a question on behalf of my classmates. Haha, the question is as the title says.I would like to ask forum friends to explain it! ! Thank you...
lalaone MCU
Can anyone tell me about the research on FPGA chip EPCS4?
[i=s] This post was last edited by paulhyde on 2014-9-15 04:22 [/i] How does his active configuration method work?...
sonic1007 Electronics Design Contest
Controllable Paper Plane--PowerUp
Earlier this year, a very cool toy "accessory" called PowerUp was exhibited at the American International Toy Fair. You can control the paper airplane to fly freely in the sky directly using your smar...
qinkaiabc Creative Market

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 164  1338  2877  2798  2182  4  27  58  57  44 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号