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RTQ2822T

Peak 15A, 17V, High Efficiency Synchronous Step-Down Converter

RTQ2822T
New

The RTQ2822T is a high-performance, synchronous step-down converter that can deliver up to 15A output current with an input supply voltage range of 4.5V to 17V. The device integrates low RDS(ON) power MOSFETs, accurate 0.6V reference and an integrated diode for bootstrap circuit to offer a very compact solution. The RTQ2822T adopts Advanced Constant On-Time (ACOT®) control architecture that provides ultrafast transient response and further reduces the external-component count. In steady state, the ACOT® operates in nearly constant switching frequency over line, load and output voltage ranges and makes the EMI filter design easier.

The device offers a variety of functions for more design flexibility. The selectable switching frequency, current limit level and PWM operation modes makes the RTQ2822T easy-to-use over wide application range. Independent enable control input pin and power good indicator are also provided for easy sequence control. To control the inrush current during the startup, the device provides a programmable soft start-up by an external capacitor connected to the SS pin. Fully protection features are also integrated in the device including the cycle-by-cycle current limit, UVP, input UVLO and OTP.

The RTQ2822T is available in a thermally enhanced VQFN-18L 3.5x3.5 (FC) package.

Applications

  • Server, Storage and Network Equipment
  • Telecom Infrastructure
  • Point of Load (POL) Power Modules
  • High Density DC-DC Converters
  • High End Digital TV

Key Spec.

RTQ2822T
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 17
Number of Outputs 1
Vout (min) (V) 0.6
Vout (max) (V) 5.5
Output Adj. Method Resistor
Iout (max) (A) 15
Current Limit (typ) (A) 14;17
Freq (min) (kHz) 320;640;960
Freq (max) (kHz) 1440;480;960
Ext Sync No
Ron_HS (typ) (mOhm) 9.8
Ron_LS (typ) (mOhm) 4.5
Iq (typ) (mA) 0.6
Features ACOT Control;Adjustable Current Limit;Adjustable Frequency;Adjustable Soft-Start;Built-in Bootstrap Switch;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;Power Good;Selectable (PSM or PWM);Stable with Ceramic Capacitor;UVP
Package Type VQFN3.5x3.5-18(FC)

Features

  • 4.5V to 17V Input Voltage Range

  • Integrated 9.8mΩ/4.5mΩ MOSFETs

  • 0.6V ±1% Voltage Reference

  • Adjustable Output Voltage from 0.6V to 5.5V

  • Supports Ceramic Output Capacitor

  • ACOT® Control for Fast Transient Response

  • Selectable Switching Frequency (400kHz/800kHz/1200kHz)

  • Selectable Current Limit Level

  • Power Good Indicator

  • Programmable Soft-Start Time with a Default 1.2ms

  • Monotonic Start-Up into Pre-Biased Outputs

  • 18-Lead VQFN (FC) Package

Application Notes

Datasheet

DSQ2822T-02.pdf

Datasheet

DSQ2822T-02.pdf

Contact us for more information