Texas Instruments TPS566247 | Demoboard TPS566247EVM

Description

In light-load conditions, the TPS566242 operates in Eco mode to enable higher efficiency by varying its switching frequency. The TPS566247 operates in FCCM to maintain constant switching frequency. The main difference is at light loading, but the other behaviors are similar. This user's guide mainly introduces the TPS566242 and includes some features about the TPS566247 that are different from the TPS566242.The TPS56624x is a single, adaptive on-time, D-CAP3™ control mode, synchronous buck converter that requires a very low external component count. The D-CAP3 control circuit is optimized for low-ESR output capacitors such as POSCAP, SP-CAP, or ceramic types, and features fast transient response with no external compensation. The switching frequency is internally set at a nominal 600 kHz. The high-side and low-side switching MOSFETs are incorporated inside the TPS56624x package along with the gate-drive circuitry. The low drain-to-source on resistance of the MOSFETs and fast switching slew rate allow the TPS56624x to achieve high efficiencies and help keep the junction temperature low at high output currents. The TPS56624x DC/DC synchronous converter is designed to provide up to a 6-A output from an input voltage source of 3 V to 16 V. The output voltage range is from 0.6 V to 7 V.

Features

• Configured for a wide range of applications
• 3-V to 16-V input voltage range
• 0.6-V to 7-V output voltage range
• 0.6-V reference voltage
• ±1% reference accuracy at 25°C
• ±1.5% reference accuracy at –40°C to 125°C
• Integrated 27.7-mΩ and 14.8-mΩ RDSON FET
• 120-μA low quiescent current
• 600-kHz switching frequency
• Supports maximum 98% duty cycle operation
• Precision EN threshold voltage
• 1.39-ms fixed typical soft-start time
• Ease of use and small solution size
• Eco-mode (TPS566242) and FCCM mode at light loading (TPS566247)
• Part of a full P2P family including solutions for 4 A, 5 A, and 6 A and FCCM/ECO operation
• D-CAP3™ control topology
• Support start-up with prebiased output
• Non-latch for OV/OT/UVLO protection
• Hiccup mode for UV protection
• Cycle-by-cycle OC and NOC limit
• 6-pin SOT-563 package
• Create a custom design using the TPS566242 with the WEBENCH® Power Designer
• Create a custom design using the TPS566247 with the WEBENCH® Power Designer

Typical applications

• IP network camera, video doorbell, building security gateway, WLAN/Wi-Fi access point, modem (cable/DSL/ GFAST)
• LCD TV
• DVR, streaming media player

More information

• Datasheet
• IC product information