Sample &
Buy
Reference
Design
®
RT2660
6A, 6V, Synchronous Step-Down Converter with REFIN
General Description
Features
Continuous 6A Sink or Source Output Current ability
and Droop Design for DDR Memory Termination
Applications
The RT2660 in thermally enhanced VQFN-20L 3.5x4
package is a full featured 6V, 6Asynchronous step-down
DC-DC converter designed specifically for Double Data
Rate (DDR) memory termination, which provides a
continuous 6Asink and source current and fixed 1/2DDQ
at output. The current mode COT architecture with
external compensation allows the transient response to
be optimized over a wide range of loads and achieves
nearly constant switching frequency over line, load, and
output voltage ranges. The multiple sets of over-current
limit and switching frequency offer an optimized power
chain for application design.
Low RDS(ON) Power N-MOSFET Switches 20mΩ/
10mΩ
Input Voltage Range : 1V to 6V
Output Adjustable from 0.6V to 2V
Current-Mode Constant On-Time Control Design
Enables Fast Transient Response
Supports All MLCC Output Capacitor and SP/
POSCAP with Robust Loop Stabilization
Selectable 600kHz or 1MHz Switching Frequency
Supports Pre-Biased Start-Up
Efficiency is maximized through the integrated 20mΩ/
10mΩ MOSFETs, and cycle-by-cycle current limit provides
protection against shorted outputs. Output external
tracking function, output soft discharge, power good
indicating, output droop support are all featured in the
RT2660. In addition, the device is specified from 0°C to
85°C to perform an excellent regulation with an accurate
1% reference voltage over temperature.
Selectable Over-Current Protection
Various Operation Mode Selection for Different
Application Requirements
External Tracking Start-Up Application
Enable Input Control and Power Good Indicator
Under-Voltage and Over-Voltage Protection
Applications
DDR-2/3/4 VTT Regulation (1/2VDDQ) for Enterprise
Servers, Ethernet Switches and Routers,Global Storage,
GSM Base Station, and Industrial equipments
Enterprise POL (using precision internal VREF)
Simplified Application Circuit
VIN
BOOT
RT2660
V
IN
C
C
IN
BOOT
L
SW
V
V
OUT
V5IN
Enable
Mode
EN
C
OUT
MODE
VOUT
V5IN
C
COMP
R
COMP
C
V5IN
COMP
VREF
R
PGOOD
PGOOD
PGND
PGOOD
C
REF
R1
R2
GND
REFIN
Copyright 2018 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS2660-01 March 2018
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
