TPS568230 4.5-V to 18-V Input, 8-A Synchronous Step-Down Voltage Regulator

1 Features

Input voltage range: 4.5 V to 18 V
D-CAP3™ architecture control for fast transient response
Output voltage range: 0.6 V to 7 V
0.6-V±1% reference voltage (25°C)
Supports 8-A continuous output current
Integrated 19.5-mΩ and 9.5-mΩ R_DS(on) internal power MOSFET
ULQ™(Ultra Low Quiescent current) feature to enable long battery life
Selectable operation modes:
- Forced continuous conduction mode (FCCM)
- Out-of-Audio™(OOA) Mode
- Advanced Eco-Mode™
Selectable 600-kHz, 800-kHz and 1-MHz switching frequency
Supports up to 90% duty operation
Adjustable soft start time by SS pin
Power good output
Built-in output discharge function
Cycle-by-cycle over current protection
Non-latched for fault protection
Small 3.0-mm × 3.0-mm HotRod™ QFN package

2 Applications

Digital TV, set-top box, gaming consoles
Server, storage and networking point-of-load
Industrial PC and factory automation applications
Distributed power systems with typical 5-V, 12-V, 15-V input

3 Description

The TPS568230 is a cost effective, high-voltage input, high efficiency synchronous buck converter with integrated MOSFETs.

The TPS568230 has the ULQ™ (Ultra Low Quiescent current) feature to enable low-bias current. It operates with supply input voltage from 4.5 V to 18 V. It uses DCAP3™ control mode to provide fast transient response, good line, load regulation, no requirement for external compensation, and support low equivalent series resistance (ESR) output capacitors such as specialty polymer and ultra-low ESR ceramic capacitors.

The TPS568230 provides complete Over-voltage, Under-voltage, Over-current, Over-temperature and Under-voltage lock-out protections. It is combined power good signal , output discharge function and large duty operation feature.

TPS568230 is equipped with a MODE pin to select the desirable mode of operation. To attain high efficiency at light load, OOA mode and Advanced Eco-mode™ could be selected. OOA mode will not allow the part to go below audible frequency ( below 25kHz switching frequency ). FCCM is also available to support tight output voltage ripple requirement.

The TPS568230 supports both internal and external soft-start time option. The internal fixed soft-start time is 1.3 ms. Longer soft-start time can be get by connecting the external capacitor on SS pin.

The TPS568230 is available in a 20-pin 3.0-mm x 3.0-mm HotRod™ package and the junction temperature is specified from -40^oC to 125^oC.

Device Information⁽¹⁾

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS568230	VQFN (20)	3.00 mm × 3.00 mm

For all available packages, see the orderable addendum at the end of the data sheet.