Texas Instruments TPS568231

Description

The TPS568231 is a single, D-CAP3™ control mode, synchronous buck converter requiring a very low external component count. The TPS568231 is a high efficiency, cost effective, low quiescent current synchronous buck converter with integrated FETs. A mode pin is used to select output current limit, switching frequency, and forced continuous conduction mode (FCCM) and discontinuous conduction mode (DCM) operation. The device uses DCAP3 control mode to provide a fast transient response, good line, load regulation, no requirement for external compensation, and supports low ESR output capacitors. Additionally, the TPS568231 provides adjustable soft start, undervoltage lockout inputs and a power-good output. Rated input voltage and output current ranges for the evaluation module are given in Table 1-1.The TPS568231EVM evaluation module (EVM) is a single, synchronous buck converter providing 1.2 V at 8 A from 4.5-V to 17-V input. This user’s guide describes the TPS568231EVM performance.

Features

• 4.5-V to 17-V input range without external bias
• 3.8-V to 17-V input range with external bias
• Supports 8-A continuous output current
• Integrated 7.8-mΩ and 3.2-mΩ MOSFETs
• 0.6-V ±1% reference voltage across a –40°C to 125°C junction range
• 0.6-V to 5.5-V output voltage range
• 146-μA low quiescent current
• D-CAP3™ control mode for fast transient response
• Supports ceramic output capacitors
• Selectable fSW of 400 kHz, 800 kHz, and 1200 kHz
• Selectable FCCM (forced continuous conduction mode) for tight output voltage ripple
• Selectable Eco-mode™ (auto skip mode) for high light-load efficiency
• Optional external 5-V bias for enhanced efficiency
• Prebiased start-up capability
• Adjustable soft start with a default 1.2-ms soft-start time
• Power-good indicator to monitor output voltage
• Two adjustable current limit settings with hiccup restart
• Non-latched protections for UV, OV, OT, and UVLO
• Pin-to-pin compatible with 8-A TPS568215, and 12-A TPS56C231 and TPS56C215
• –40°C to 125°C operating junction temperature
• 3.5-mm × 3.5-mm, 18-pin HotRod™ QFN package

Typical applications

• IPCs, factory automation, PLC, test measurement
• Wireless infrastructure

More information

• Datasheet
• IC product information