Richtek RTQ2826T

Description

The RTQ2826T 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 RTQ2826T 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 RTQ2826T 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.

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

Typical applications

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

More information

• Datasheet
• IC product information