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Texas Instruments TPS56425x Synchronous Buck Converters

Texas Instruments TPS56425x Synchronous Buck Converters are simple, easy-to-use, high efficiency, high power density synchronous buck converters. Each has an input voltage ranging from 3V to 17V and supports up to 4A continuous current at output voltages between 0.6V and 10V. The TPS56425x employs D-CAP3 control mode to provide a fast transient response and support low-ESR output capacitors without external compensation. The device can support up to 97% of duty cycle operations. The integrated bootstrap capacitor helps achieve single-layer PCB and can save total BOM cost.

The TPS564252 operates in Eco-mode, which maintains high efficiency during light loading. The TPS564257 operates in FCCM mode, which keeps the same frequency and lower output ripple during all load conditions. The TPS564255 operates in OOA mode, which prevents audio noise generation. The device integrates complete protection through OVP, OCP, UVLO, OTP, and UVP with hiccup. The Texas Instruments TPS56425x is available in a 1.6mm × 1.6mm SOT-563 package. The junction temperature is specified from –40°C to 125°C.

Features

Configured for a wide range of applications
- 3V to 17V input voltage range
- 0.6V to 10V output voltage range
- 0.16V reference voltage
- ±1% reference accuracy at 25°C
- ±1.5% reference accuracy at –40°C to 125°C
- Integrated 55.0mΩ and 24.3mΩ MOSFETs
- 100µA low quiescent current
- 600kHz switching frequency
- Maximum 97% large duty cycle operation
- Precision EN threshold voltage
- 1.6ms fixed typical soft-start time

Ease of use and small solution size
- TPS564252 Eco-mode, TPS564257 FCCM mode, TPS564255 OOA mode at light loading
- D-CAP3™ control mode
- Easy layout with integrated bootstrap capacitor
- Support start-up with pre-biased output
- Open-drain power-good indicator
- Non-latch for OV, OT, and UVLO protection
- Hiccup mode for UV protection
- Cycle-by-cycle OC and NOC protection
- 1.6mm × 1.6mm SOT-563 package

Applications

WLAN/Wi-Fi access point, switch, and router
Pro-audio, surveillance, and drone
TV, STB and DVR, and smart speaker

Texas Instruments TPS56425x Synchronous Buck Converters

Features

Applications

Functional Block Diagram

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