TPS65295 Texas instruments

TPS65295

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TPS65295

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Описание

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.

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 R_DS(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 R_DS(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

DDR memory type	DDR4
Control mode	D-CAP3
Iout VDDQ (max) (A)	8
Iout VTT (max) (A)	1
Iq (typ) (mA)	0.15
Output	VDDQ, VREF, VTT
Vin (min) (V)	4.5
Vin (max) (V)	18
Features	Complete Solution
Rating	Catalog
Operating temperature range (°C)	-40 to 125
Regulator type	Step-Down Converter
Vin bias (max) (V)	16
Vin bias (min) (V)	4.5
Vout VTT (min) (V)	0.6