Texas Instruments TPS53318DQPR — 1.5–22 V, 8 A Synchronous Buck Converter with Eco-mode
The Texas Instruments TPS53318DQPR is a high-efficiency, integrated synchronous step-down (buck) converter designed to power demanding point-of-load rails in computing, communications, and industrial systems. With a wide 1.5 V to 22 V input range and up to 8 A of output current, this device integrates both the high-side and low-side MOSFETs to minimize external component count, simplify design, and shrink board space. Eco-mode light-load operation further boosts efficiency when system power demand is low, helping designers meet overall energy and thermal targets.
For sourcing teams and design engineers seeking a compact, reliable DC/DC converter for 12 V or intermediate bus architectures, the TPS53318DQPR delivers a strong balance of performance, integration, and protection features in a 22-LSON-CLIP (DQP) surface-mount package.
At a Glance
- Brand/Manufacturer: Texas Instruments
- MPN: TPS53318DQPR
- Category: Power Management ICs > DC-DC Converters (Buck)
- Input voltage range: 1.5 V to 22 V
- Output current: Up to 8 A
- Topology: Synchronous buck (step-down)
- Integrated MOSFETs: Yes (high-side and low-side)
- Light-load operation: Eco-mode
- Operating junction temperature (TJ): -40°C to +125°C
- Package: 22-LSON-CLIP (TI package code: DQP)
- Pin count: 22
- Mounting: Surface mount
- Packaging: Tape & Reel (TR)
- Lifecycle status: Active (per TI product page)
Protection features: overcurrent, overvoltage, undervoltage lockout, and thermal shutdown.
What Makes TPS53318DQPR Stand Out?
- Wide input range for flexibility: The 1.5–22 V input window supports a variety of bus voltages, including common 5 V and 12 V rails, making the TPS53318DQPR suitable as a point-of-load converter for FPGAs, ASICs, DSPs, and memory subsystems.
- Integrated power stage: On-chip high-side and low-side MOSFETs reduce the external BOM, ease layout, and help achieve predictable performance without having to match external FETs.
- Eco-mode for light-load efficiency: When system activity drops, the device’s Eco-mode reduces switching losses to improve efficiency at low output power, aiding energy savings and thermal headroom.
- Robust protection suite: Built-in overcurrent, overvoltage, undervoltage lockout, and thermal shutdown increase system reliability and guard against fault conditions.
Applications and Use Cases
The Texas Instruments TPS53318DQPR is a versatile choice wherever a compact, efficient buck regulator is needed at up to 8 A output:
- Point-of-load regulation for FPGAs/ASICs/DSPs: Easily steps down intermediate or 12 V rails to core or I/O voltages for high-performance logic.
- DDR memory power rails: Suits tightly regulated memory rails that benefit from a high-efficiency, integrated synchronous architecture.
- Telecom/datacom and networking equipment: Ideal for space-constrained line cards, access equipment, and baseband/control planes that require reliable, high-density power conversion.
- Industrial and embedded systems: Supports robust operation across a wide input range and extended junction temperature range for industrial environments.
With its integration and Eco-mode operation, the TPS53318DQPR is a strong fit in designs that must meet stringent efficiency, thermal, and footprint constraints while keeping BOM complexity in check.
Specifications
Electrical Characteristics
- Input voltage range: 1.5 V to 22 V
- Output current (maximum): 8 A
- Topology: Synchronous buck (step-down)
- Integrated MOSFETs: High-side and low-side
- Light-load mode: Eco-mode
- Operating junction temperature (TJ): -40°C to +125°C
- Protection features: Overcurrent, overvoltage, undervoltage lockout (UVLO), thermal shutdown
Not specified in datasheet (from provided information):
- Switching frequency
- Output voltage range
- Efficiency curves
- Soft-start/track features
- Enable/Power Good specifics
- Synchronization/Spread spectrum options
If these parameters are critical to your design, consult the official Texas Instruments datasheet and product page linked below.
Mechanical and Packaging
- Package: 22-LSON-CLIP (TI package code: DQP)
- Pin count: 22
- Mounting: Surface mount
- Packaging format: Tape & Reel (TR)
The LSON-CLIP construction is designed to enhance thermal and electrical performance versus traditional leaded packages, supporting efficient heat transfer from the device to the PCB when proper thermal vias and copper planes are used.
Design-In Considerations
While the TPS53318DQPR integrates the power MOSFETs to simplify implementation, careful component selection and layout are still essential to achieve optimal efficiency, ripple, transient response, and thermal performance.
- Inductor selection: Choose an inductor with a saturation current comfortably above the peak inductor current at 8 A load, with margin for transients and expected ripple. Low DCR inductors help reduce conduction losses.
- Output capacitors: Low-ESR ceramic or polymer capacitors minimize output ripple and improve transient response. Size the total capacitance and ESR to meet your load step requirements per TI’s guidelines.
- Input capacitors: Place high-quality ceramic input capacitors close to the VIN and PGND pins to reduce input ripple current and minimize switch-node ringing.
- Layout best practices: Keep the power loop (input caps, integrated MOSFETs, inductor) as tight as possible to reduce parasitic inductance. Provide a low-impedance ground return, use wide copper pours for current-carrying paths, and follow the evaluation board/layout recommendations in the datasheet.
- Thermal management: The 22-LSON-CLIP package benefits from ample copper area under the exposed thermal pads and from thermal vias into inner/ground planes. Verify junction temperature over the full load and ambient range to ensure margin up to +125°C TJ.
- Start-up and sequencing: For rails that require specific sequencing (e.g., certain FPGA and DDR supplies), review the datasheet’s enable/UVLO behavior and any available soft-start/tracking features. Where not specified in the provided data, confirm details in the datasheet (Not specified in datasheet).
These practices help you leverage the TPS53318DQPR’s integration and protections, providing a robust, low-noise supply for sensitive digital loads.
Lifecycle, Availability, and Compliance
- Lifecycle status: Active (per Texas Instruments product page)
- Replacements or pin-compatible alternatives: Not specified in datasheet
- Availability: Check Texas Instruments and authorized distributors for current stock and lead times
- RoHS/Environmental compliance: Not specified in datasheet
If your project requires formal declarations (RoHS, REACH, CE, etc.), request the latest environmental and quality documents from TI or your distributor. Compliance status may vary by date code or manufacturing site; always verify against current official documentation.
Why Choose Texas Instruments TPS53318DQPR?
- Efficiency at both high and light loads: The synchronous architecture combined with Eco-mode helps meet efficiency requirements across a wide operating envelope.
- Simplified BOM and smaller footprint: Integrated high-side and low-side MOSFETs reduce external components and layout complexity compared to controllers with external FETs.
- Broad input range: Support for 1.5–22 V input allows direct regulation from common intermediate bus levels and battery-backed rails.
- Protection built in: Overcurrent, overvoltage, UVLO, and thermal shutdown contribute to safer operation and improved system reliability.
- Proven brand: Texas Instruments offers extensive documentation, reference designs, and long-term product support that buyers and engineers rely on.
For sourcing managers, the combination of an active lifecycle status, established TI supply chain, and a standard 22-LSON-CLIP (DQP) package helps reduce procurement risk and simplifies second-source planning at the board level.
Ordering Information
- Manufacturer: Texas Instruments
- Part number (MPN): TPS53318DQPR
- Package: 22-LSON-CLIP (DQP)
- Pin count: 22
- Mounting: Surface mount
- Packaging: Tape & Reel (TR)
When placing orders, reference the full MPN “TPS53318DQPR” to ensure the correct package and tape-and-reel configuration.
Resources
- Texas Instruments Product Page: https://www.ti.com/product/TPS53318
- Datasheet: https://www.ti.com/lit/ds/symlink/tps53318.pdf
These resources provide complete electrical characteristics, application schematics, PCB layout guidance, and thermal information.
Frequently Asked Questions (FAQs)
Q: What input voltage range does the Texas Instruments TPS53318DQPR support?
A: 1.5 V to 22 V.
Q: What is the maximum continuous output current?
A: Up to 8 A.
Q: Does the TPS53318DQPR integrate the power MOSFETs?
A: Yes. It integrates both the high-side and low-side MOSFETs, simplifying the design and reducing external component count.
Q: What is the package and pin count?
A: 22-LSON-CLIP (TI code: DQP) with 22 pins.
Q: What light-load efficiency feature is included?
A: Eco-mode operation for improved light-load efficiency.
Q: What protection features are available?
A: Overcurrent, overvoltage, undervoltage lockout, and thermal shutdown.
Q: What is the operating junction temperature range?
A: -40°C to +125°C (TJ).
Q: Is the TPS53318DQPR RoHS compliant?
A: Not specified in datasheet. Verify with the latest TI documentation or compliance statements.
Q: What is the lifecycle status?
A: Active (per the Texas Instruments product page).
Q: Are there recommended replacements or pin-compatible alternatives?
A: Not specified in datasheet.
Q: Is the TPS53318DQPR suitable for DDR memory rails and FPGA/ASIC point-of-load supplies?
A: Yes. These are listed application targets and are well served by the device’s integrated synchronous architecture and 8 A capability.
Q: What is the mounting type and packaging format for procurement?
A: Surface-mount device supplied in Tape & Reel (TR) under the MPN TPS53318DQPR.
For engineers and sourcing teams, the Texas Instruments TPS53318DQPR offers a practical blend of integration, efficiency, and protections in a compact package, making it a dependable choice for modern point-of-load power conversion across computing, networking, and industrial designs.