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The RT2660 in thermally enhanced VQFN-20L 3.5x4 package is a full featured 6V, 6A synchronous step-down DC/DC converter designed specifically for Double Data Rate (DDR) memory termination, which provides a continuous 6A sink and source current and fixed 1/2 DDQ 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.

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.

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)
Key Spec.
RT2660H RT2660L
Status Active Active
Vin (min) (V) 1 1
Vin (max) (V) 6 6
Number of Outputs 1 1
Vout (min) (V) 0.6 0.6
Vout (max) (V) 2 2
Output Adj. Method Ext Vref;Resistor Ext Vref;Resistor
Iout (max) (A) 6 6
Current Limit (typ) (A) 5.4;7.6 5.4;7.6
Freq (typ) (kHz) 1000;600 1000;600
Ext Sync No No
Ron_HS (typ) (mOhm) 20 20
Ron_LS (typ) (mOhm) 10 10
Iq (typ) (mA) 1.1 1.1
Features Adjustable Current Limit;Adjustable Frequency;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;PSM;Power Good;Selectable (PSM or PWM);Stable with Ceramic Capacitor;UVP Adjustable Current Limit;Adjustable Frequency;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;PSM;Power Good;Selectable (PSM or PWM);Stable with Ceramic Capacitor;UVP
Package Type VQFN3.5x4-20 VQFN3.5x4-20
Features
  • Continuous 6A Sink or Source Output Current ability and Droop Design for DDR Memory Termination Applications
  • 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
  • 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
Reference Design
TitleLast UpdateDownload
Richtek Load Transient Tool2022/07/25
Part NumberPackage TypePackage Qty.Free SampleDistributorStockBuy From Authorized Distributor
RT2660LGQVVQFN3.5x4-201,500 Request Digikey 1,169 Buy
Mouser 0 Lead-Time: 14 weeks
Please confirm with our distributor or sales representative for actual stock status.
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