TPS54327EVM-686: 1.05V @ 3A, 4.5 ~ 18V in

Summary

The TPS54327 is a single, adaptive on-time, D-CAP2™-mode, synchronous buck converter requiring a very low external component count. The D-CAP2™ 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 700 kHz.

The high-side and low-side switching MOSFETs are incorporated inside the TPS54327 package along with the gate drive circuitry. The low drain-to-source on resistance of the MOSFETs allows the TPS54327 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The TPS54327 dc/dc synchronous converter is designed to provide up to a 3-A output from an input voltage source of 4.5 V to 18 V. The output voltage range is from 0.76 V to 7 V. Rated input voltage and output current range for the evaluation module are given in Table 1.

The TPS54327EVM-686 evaluation module is a single, synchronous buck converter providing 1.05 V at 3 A from 5-V to 18-V input. This user’s guide describes the TPS54327EVM-686 performance.

Specifications

Manufacturer	Texas Instruments
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	296-28143-ND
Eval Board Supplier	Texas Instruments
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	1.05 V
Current Out	3 A
Voltage In	4.5 ~ 18 V
Efficiency @ Conditions	>86%, 5V in, 1.05V @ 0.3 ~ 1.2 A >80%, 12V in, 1.05V @ 0.4 ~ 1.7 A >75%, 5V in, 1.05V @ 0.15 ~ 3 A >74%, 12V in, 1.05V @ 0.2 ~ 3 A
Voltage Out Range	0.76 ~ 7 V
Features	Current Limit (Adj. or Fixed) Over Current Protection Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	675 kHz
Standby Current [Typical]	1.8 µA
Quiescent Current [Typical]	800 µA
Component Count + Extras	15 + 12
Internal Switch	Yes
Design Author	Texas Instruments
Application / Target Market	Computers DVD/Blu-ray Players LCD TV / Monitor Set-Top Boxes
Standby Current [Maximum]	10 µA
Quiescent Current [Maximum]	1.2 mA
Main I.C. Base Part	TPS54327
Date Created By Author	2010-11
Date Added To Library	2012-04