AGREE

This website stores cookies on your computer. These cookies are used to collect information about how you interact with our website and allow us to remember you. We use this information in order to improve and customize your browsing experience and for analytics and metrics about our visitors both on this website and other media. To find out more about the cookies we use, see our Cookie Statement.
If you decline, your information won’t be tracked when you visit this website. A single cookie will be used in your browser to remember your preference not to be tracked. Find out more here.

RT6339

11A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO

RT6339
New

The RT6339 family are high efficiency synchronous step-down DC-DC converters with pseudo constant switching frequency 500kHz and deliver up to 11A output current. The RT6339A/B/D and RT6339AH/BH/DH operate from 4.5V to 23V input voltage. The output voltage of RT6339A/AH/D/DH is programmable between 0.6V to 5.5V and RT6339B/BH is fixed to 3.3V output voltage. The input voltage of RT6339C/CH ranges from 5.2V to 23V and the output voltage of RT6339C/CH is fixed to 5.1V.

The RT6339 adopts Advanced Constant On-Time (ACOT®) control architecture that provides ultra-fast transient response and further reduces the external component count. In steady states, the ACOT® operates at nearly constant switching frequency over line, load and output voltage ranges and makes the EMI filter design easier.

By setting the voltage of the EN/MODE pin, RT6339 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, RT6339 provides the best light-load efficiency and improves the acoustic noise with spread spectrum function.

RT6339 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.

All above functions are integrated in a UQFN-23L 3x3 (FC) package.

Applications

  • Laptop Computers
  • Tablet PCs
  • Networking Systems
  • Servers
  • Personal Video Recorders
  • Flat Panel Television and Monitors
  • Distributed Power Systems

Key Spec.

RT6339A RT6339AH RT6339B RT6339BH RT6339C RT6339CH RT6339D RT6339DH
Status Active Active Active Active Active Active Active Active
Vin (min) (V) 4.5 4.5 4.5 4.5 5.2 5.2 4.5 4.5
Vin (max) (V) 23 23 23 23 23 23 23 23
Number of Outputs 1 1 1 1 1 1 1 1
Vout (min) (V) 0.6 0.6 3.267 3.267 5.049 5.049 0.6 0.6
Vout (max) (V) 5.5 5.5 3.333 3.333 5.151 5.151 5.5 5.5
Output Adj. Method Resistor Resistor Fixed Fixed Fixed Fixed Resistor Resistor
Iout (max) (A) 11 11 11 11 11 11 11 11
Current Limit (typ) (A) 13;15;17 13;15;17 16 16 16 16 16;25.8;6.5 16;25.8;6.5
Freq (typ) (kHz) 500 500 500 500 500 500 500 500
Ext Sync No No No Yes No No No No
Ron_HS (typ) (mOhm) 17 17 17 17 17 17 17 17
Ron_LS (typ) (mOhm) 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5
Iq (typ) (mA) 0.085 0.085 0.095 0.095 0.095 0.095 0.085 0.085
Features ACOT Control;Adjustable Current Limit;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP;Ultrasonic Mode Control ACOT Control;Adjustable Current Limit;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP;Ultrasonic Mode Control ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP;Ultrasonic Mode Control ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP;Ultrasonic Mode Control ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP;Ultrasonic Mode Control ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP;Ultrasonic Mode Control ACOT Control;Adjustable Current Limit;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP ACOT Control;Adjustable Current Limit;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP
Package Type UQFN3x3-23(FC) UQFN3x3-23(FC) UQFN3x3-23(FC) UQFN3x3-23(FC) UQFN3x3-23(FC) UQFN3x3-23(FC) UQFN3x3-23(FC) UQFN3x3-23(FC)

Features

  • Input Voltage Range
    ► RT6339A/B/D and RT6339AH/BH/DH: 4.5V to 23V
    ► RT6339C/CH: 5.2V to 23V

  • Output Voltage
    ► RT6339A/AH and RT6339D/DH: 0.6V to 5.5V
    ► RT6339B/BH: 3.3V
    ► RT6339C/CH: 5.1V

  • 11A Continuous Output Current

  • Stable with POSCAP and MLCC Capacitor

  • Fast Transient Response

  • Diode Emulation Mode (DEM) for Power Saving

  • Ultrasonic Mode (USM) for Avoiding Acoustic Noise

  • Pseudo Constant Switching Frequency 500kHz in CCM

  • Internal Power MOSFET Switch 17mΩ (high-side) and 7.5mΩ (low-side)

  • LDO
    ► RT6339B/BH: 3.3V/100mA
    ► RT6339C/CH: 5V/100mA

  • Overcurrent Limit
    ► RT6339A/AH: Adjustable (13A, 15A or 17A)
    ► RT6339D/DH: Adjustable (6.5A, 16A or 25.8A)
    ► RT6339B/BH/C/CH: 16A

  • Output Under-/Overvoltage Protection (UVP/OVP)
    ► RT6339A/B/C/D: Latched Mode UVP/OVP
    ► RT6339AH/BH/CH/DH: Hiccup Mode UVP and Non-Latched Mode OVP

  • Input Undervoltage-Lockout (UVLO)

  • Over-Temperature Protection (OTP)
    ► RT6339A/B/C/D: Latched Mode OTP
    ► RT6339AH/BH/CH/DH: Non-Latched Mode OTP

  • Junction Temperature Range: -40°C to 125°C

Datasheet

DS6339-00.pdf

Datasheet

DS6339-00.pdf

Contact us for more information