Texas Instruments TPS65295 | Demoboard TPS65295EVM-079

Description

The TPS65295 device provides a complete power solution for DDR4 memory system with the lowest total cost and minimum space. It meets the JEDEC standard for DDR4 power-up and power-down sequence requirement. The TPS65295 integrates two synchronous buck converters (VPP and VDDQ) and a 1-A sink and source tracking LDO (VTT) and a buffered low noise reference (VTTREF). The TPS65295 employs D-CAP3™ mode coupled with 600-kHz switching frequency for ease-of-use, fast transient, and support for ceramic output capacitors without an external compensation circuit.The VTTREF tracks ½ VDDQ within excellent 0.8% accuracy. The VTT, which provides both 1-A sink and source continual current capabilities, requires only 10-µF of ceramic output capacitor.The TPS65295 provides rich functions as well as excellent power supply performance. It supports flexible power state control, placing VTT at high-Z in S3 and discharging VDDQ, VTT, and VTTREF in S4/S5 state. OVP, UVP, OCP, UVLO and thermal shutdown protections are also available. The part is available in a thermally enhanced 18-pin HotRod™ VQFN package and is designed to operate under the –40°C to 125°C junction temperature range.

Features

• Synchronous buck converter (VDDQ)
• Input voltage range: 4.5 V to 18 V
• Output voltage fixed at 1.2 V
• D-CAP3™ mode control for fast transient response
• Continual output current: 8 A
• Advanced Eco-mode™ pulse skip
• Integrated 22-mΩ and 8.6-mΩ RDS(on) internal power switch
• 600-kHz switching frequency
• Internal soft start: 1.6 ms
• Cycle-by-cycle overcurrent protection
• Latched output OV and UV protections
• Synchronous buck converter (VPP)
• Input voltage range: 3 V to 5.5 V
• Output voltage fixed at 2.5 V
• D-CAP3™ mode control for fast transient response
• Continual output current: 1 A
• Advanced Eco-mode™ pulse skip
• Integrated 150-mΩ and 120-mΩ RDS(on) internal power switch
• 580-kHz switching frequency
• Internal soft start: 1 ms
• Cycle-by-cycle overcurrent protection
• Latched output OV and UV protections
• 1-A LDO (VTT)
• 1-A continual sink and source current
• Requires only 10 µF of ceramic output capacitor
• Support high-z in S3
• ±30-mV VTT output accuracy (DC+AC)
• Buffered reference (VTTREF)
• Buffered, low noise, ±10-mA capability
• 0.8% output accuracy
• Low quiescent current: 150 µA
• Power good indicator
• Output discharge function
• Power up and power down sequencing control
• Non-latch for OT and UVLO protections
• 18-pin 3.0-mm × 3.0-mm HotRod™ VQFN package

Typical applications

• DDR4 memory power supplies
• Notebook, PC computers, and servers, Ultrabook, tablet computers, Single-board computer, computer on module

More information

• Datasheet
• IC product information