Texas Instruments TPS562211

Description

The output voltage transient of a buck regulator during a load current step is often a key performance specification. While there are many types of control topologies addressing special design challenges for non isolated DC/DC converter, including Voltage-mode control, peak current mode control, constant on-time (COT) control, D-CAP2 control mode a variation of adaptive constant-on time control mode, advanced emulated current mode (AECM).No single control topology is a good fit for all applications. The various control modes each has unique advantages. This note, we will provide a performance comparison of DC/DC converters operating in three different modes: PCM control mode, D-CAP2™ control mode (a derivative of constant on-time), and AECM control mode. These three control modes were all used widespread, none of these control modes require loop compensation which making the design simple.

Features

• Input voltage: 4.2 V to 18 V
• Output voltage: 0.6 V to 7 V
• Up to 2-A continuous output current
• Minimum switching on time: 45 ns
• Maximum duty cycle: 98%
• High efficiency
• Integrated 66-mΩ and 33-mΩ MOSFETs
• Quiescent current 120-μA typical
• Highly flexible and easy to use
• Selectable Eco-mode or FCCM operation
• Selectable power good indicator or external soft start
• Precise enable input
• High accuracy
• Reference voltage accuracy: ±1% (25°C)
• Switching frequency tolerance: ±8.5%
• Small solution size
• Internal compensation for ease of use
• SOT583 package
• Minimum external components
• Cycle-by-cycle current limit for both high-side and low-side MOSFETs
• Non-latched OVP, UVP, UVLO, and TSD protections
• Create a custom design using TPS562211 with the WEBENCH® Power Designer

Typical applications

• Wired networking, broadband
• Set-top box (STB), digital TV, Smart speaker

More information

• Datasheet