EVB_RT6255BHGJ8F: 5V @ 5A, 4.5 ~ 18Vin

Summary

The EVB_RT6255BHGJ8F is a high-efficiency, synchronous stepdown DC-DC converter that can deliver up to 5A output current from a 4.5V to 18V input supply. The RT6255B adopts Advanced Constant On-Time (ACOT™) control architecture to provide an ultrafast transient response with few external components and to operate in nearly constant switching frequency over line, load, and output voltage ranges. The RT6255B features cycle-by-cycle current limit protection against short-circuit outputs, and soft-start function to prevent inrush current during start-up. It also includes input under-voltage lockout, output under-voltage protection, and over-temperature protection (thermal shutdown) to provide safe and smooth operation in all operating conditions.

Product Feature

Advanced Constant On-Time (ACOT™) Control for Ultrafast Transient Response
Optimized for Low-ESR Ceramic Output Capacitors
Internal 45mΩ Switch and 23mΩ Synchronous Rectifier
Adjustable, Pre-biased Compatible Soft-Start (Only for Option with SS Pin)
Power Good Indicator (90%) (Only for Option with PGOOD Pin)

Specifications

Manufacturer	Richtek USA Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	EVB_RT6255BHGJ8F-ND
Eval Board Supplier	Richtek USA Inc.
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	5 V
Current Out	5 A
Voltage In	4.5 ~ 18 V
Efficiency @ Conditions	>90%, 7V in, 5V @ 0.004 ~ 5 A >90%, 5V in, 3.3V @ 0.004 ~ 5 A >90%, 18V in, 5V @ 0.02 ~ 5 A >90%, 12V in, 5V @ 0.01 ~ 5 A >90%, 12V in, 3.3V @ 0.1 ~ 5 A >80%, 18V in, 3.3V @ 0.01 ~ 5 A
Voltage Out Range	0.6 ~ 5 V
Features	Current Limit (Adj. or Fixed) Power Good Output Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	500 kHz
Standby Current [Typical]	3 µA
Quiescent Current [Typical]	115 µA
Component Count + Extras	15 + 4
Internal Switch	Yes
Design Author	Richtek USA Inc.
Application / Target Market	LCD TV / Monitor RF: WLAN Access Points Set-Top Boxes
Standby Current [Maximum]	- Not Given
Quiescent Current [Maximum]	- Not Given
Main I.C. Base Part	RT6255B
Date Created By Author	2018-04
Date Added To Library	2018-10