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.