1 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 55.0-mΩ and 24.3-mΩ MOSFETs
– 100-μA low quiescent current
– 600-kHz switching frequency
– Maximum 97% large duty cycle operation
– Precision EN threshold voltage
– 1.6-ms 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 prebiased 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
– 1.6-mm × 1.6-mm SOT-563 package

2 Applications
• WLAN/Wi-Fi access point, switch, router
• Pro-audio, surveillance, drone
• TV, STB and DVR, smart speaker
• SSD
• Electricity meter

3 Description
The TPS56425x is a simple, easy-to-use, high
efficiency, high power density, synchronous buck
converter with input voltage ranging from 3-V to 16-V
and supports up to 4-A continuous current at output
voltages between 0.6 V and 7 V.
The TPS56425x employs D-CAP3 control mode to
provide a fast transient response and to support
low-ESR output capacitors with no requirement for
external compensation. The device can support up
to 97% duty cycle operation. 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 device is available in 1.6 mm × 1.6 mm SOT-563
package. The junction temperature is specified from
–40°C to 125°C.