RT6310
10A, 23V Synchronous Step-Down Converter with 3.3V/5V
LDO
General Description
⚫ 10A Continuous Output Current
⚫ Stable with POSCAP and MLCC Capacitor
⚫ Fast Transient Response
The RT6310 family are high efficiency synchronous
step-down DC-DC converters with pseudo constant
switching frequency 500kHz and deliver up to 10A
⚫ Diode Emulation Mode (DEM) for Power Saving
⚫ Ultrasonic Mode (USM) for Avoiding Acoustic
Noise
output
current.
The
RT6310A/B/D
and
RT6310AH/BH/DH operate from 4.5V to 23V input
voltage. The output voltage of RT6310A/AH/D/DH is
programmable between 0.6V to 5.5V and RT6310B/BH
is fixed to 3.3V output voltage. The input voltage of
RT6310C/CH ranges from 5.2V to 23V and the output
voltage of RT6310C/CH is fixed to 5.1V.
⚫ Pseudo Constant Switching Frequency 500kHz in
CCM
⚫ Internal Power MOSFET Switch 17m (high-side)
and 7.5m (low-side)
⚫ LDO
The RT6310 adopts Advanced Constant On-Time
RT6310B/BH : 3.3V/100mA
®
(ACOT ) control architecture that provides ultra-fast
RT6310C/CH : 5V/100mA
transient response and further reduces the external
⚫ Over-Current Limit
®
component count. In steady states, the ACOT
RT6310A/AH : Adjustable (13A, 15A or 17A)
RT6310D/DH : Adjustable (6.5A, 16A or 25.8A)
RT6310B/BH/C/CH : 15A
operates at nearly constant switching frequency over
line, load and output voltage ranges and makes the EMI
filter design easier.
⚫ Output Under-/Over-Voltage Protection (UVP/OVP)
RT6310A/B/C/D : Latched Mode UVP/OVP
RT6310AH/BH/CH/DH : Hiccup Mode UVP and
Non-Latched Mode OVP
By setting the voltage of the EN/MODE pin, RT6310
operates either in diode emulation mode (DEM) or
ultrasonic mode (USM) at light load. The USM
maintains operation frequency above 25kHz, which
eliminates the acoustic noise. In the DEM, RT6310
provides the best light-load efficiency and improves the
acoustic noise with spread spectrum function.
⚫ Input Under-Voltage-Lockout (UVLO)
⚫ Over-Temperature Protection (OTP)
RT6310A/B/C/D : Latched Mode OTP
RT6310AH/BH/CH/DH : Non-Latched Mode OTP
RT6310 provides PGOOD indicator for easy system
sequence control. Full protection features are also
integrated in the device, including the cycle-by-cycle
current limit, OVP, UVP, input UVLO and OTP.
Applications
⚫ Laptop Computers
⚫ Tablet PCs
⚫ Networking Systems
⚫ Servers
All above functions are integrated in a UQFN-23L 3x3
(FC) package.
⚫ Personal Video Recorders
⚫ Flat Panel Television and Monitors
⚫ Distributed Power Systems
Features
⚫ Input Voltage Range
RT6310A/B/D and RT6310AH/BH/DH : 4.5V to
23V
RT6310C/CH : 5.2V to 23V
⚫ Output Voltage
RT6310A/AH and RT6310D/DH : 0.6V to 5.5V
RT6310B/BH : 3.3V
RT6310C/CH : 5.1V
Copyright © 2023 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6310-04
August 2023
www.richtek.com
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