Richtek RTQ2158B-QA

Description

The RTQ2158B is a high-performance, Advanced Constant On-Time (ACOT®) monolithic synchronous step-down DC-DC converter that can deliver up to 8A output current from a 2.85V to 6.5V input supply. The device integrates low RDS(ON) power MOSFETs, accurate 0.6V reference and an integrated diode of bootstrap circuit to offer a very compact solution.The RTQ2158B adopts Advanced Constant On-Time (ACOT®) control architecture that provides ultrafast transient response and further reduces the external-component count. In steady states, 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 independent enable control input pin and power good indicator for easily 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 control, UVP, input UVLO and OTP. The RTQ2158B-QA is available in a thermally enhanced WET-WQFN-21L 4x4 (FC) package.

Features

• AEC-Q100 Grade 1 Qualified
• Dramatically Fast Transient Response
• Steady 460kHz Switching Frequency
• Extremely High Efficiency 15m/10m MOSFETs
• Advanced COT Control Loop
• Wide Input Voltage Range from 2.85V to 6.5V
• Optimized for Ceramic Output Capacitors
• Internal Start-Up into Pre-biased Outputs
• Power Good Indicator
• Enable Control
• Over-Current and Over-Temperature Protections
• Under-Voltage Protection with Hiccup Mode

Typical applications

• Automotive Systems, Infotainment and Cockpit Systems, Vehicle ADAS ECU, Connected Car Systems
• Broadband Communications and Industrial Systems

More information

• Datasheet
• IC product information