Description
TPS51716 – Complete DDR Memory Power Solution with Synchronous Buck and 2 A LDO
The TPS51716 is a high-performance, integrated power management IC tailored for memory modules (DDR2, DDR3, DDR3L, LPDDR3, DDR4). It combines a synchronous buck controller for generating the VDDQ rail and a dedicated 2 A sink/source tracking LDO for VTT/termination and a buffered reference (VTTREF).
By integrating multiple power functions into one small package, TPS51716 helps designers save board space and simplifies the design of memory power subsystems in notebook, desktop, or embedded platforms.
Key Features & Highlights
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Synchronous buck controller (VDDQ)
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Input voltage range: 3 V to 28 V
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Output voltage range: 0.7 V to 1.8 V
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±0.8 % reference accuracy
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Supports D‑CAP2™ mode (ceramic output capacitors without external compensation)
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Selectable switching frequencies: 500 kHz or 670 kHz
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Auto‑skip mode for light-load efficiency
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Soft‑off support in S4/S5 power states
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Overcurrent, overvoltage, undervoltage, undervoltage lock‑out protections
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Power-good output
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LDO / VTT (termination)
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2 A sink/source peak current capability
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Requires minimal output capacitance (10 µF ceramic)
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Buffered, low-noise reference (VTTREF) with ±0.8% accuracy
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VTTREF tracks VDDQ/2
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High-Z mode in S3 and soft-off discharge in S4/S5
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Robust protection & thermal management
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Thermal shutdown
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Programmable OCL using low-side MOSFET Râ‚™ sensing
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UVP / OVP / UVLO
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Package & Operating Conditions
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20-pin WQFN (3 mm × 3 mm)
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Operating ambient temperature range: –40 °C to +85 °C
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Applications
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Memory (DDR2 / DDR3 / DDR4) power rails in laptops, desktops, servers
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Embedded systems requiring integrated DDR power solutions
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Compact systems where board area and component count must be minimized
No Return / No Exchange Policy / No Warranty.
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