1 Features

1• 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

2 Applications

• DDR4 memory power supplies

• Notebook, PC computers, and servers

• Ultrabook, tablet computers

• Single-board computer, computer on module

3 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.