TPS53315 - 12A D-CAP Step-Down Regulator | Texas Instruments
MPN: TPS53315 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.56 | $7.56 |
| 10 | $6.8 | $68.00 |
| 100 | $6.12 | $612.00 |
| 500 | $5.5 | $2,750.00 |
| 1,000 | $4.95 | $4,950.00 |
Drop-in alternatives for TPS53315 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS53314RGFR
β Drop-Inπ Reference alternative (not in catalog)
TPS53319RGFT
β Drop-Inπ Reference alternative (not in catalog)
TPS53515RGFT
β Drop-Inπ Reference alternative (not in catalog)
TPS51315
β Drop-Inπ Reference alternative (not in catalog)
TPS53353
β Drop-Inπ Reference alternative (not in catalog)
TPS53315 Maximum Ratings & Electrical Characteristics
| Output Type | Adjustable |
| Output Voltage Range | 0.6 V to 5.5 V |
| Maximum Output Current | 12 A |
| Input Voltage Range | 4.5 V to 25 V |
| Control Architecture | D-CAPβ’ mode |
| High-Side MOSFET RDS(on) | 19 mΞ© |
| Low-Side MOSFET RDS(on) | 7 mΞ© |
| Reference Voltage | 0.6 V Β±1% |
| Integrated Boost Switch | Yes |
| Switching Frequency | [DATA_NEEDED: Switching frequency] |
| Operating Temperature Range | -40Β°C to +85Β°C |
| Package | 40-VFQFN Exposed Pad |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | [DATA_NEEDED: MSL Level] |
TPS53315 Pin Configuration
| Pin 1 | VIN β Input supply voltage |
| Pin 2 | VIN β Input supply voltage |
| Pin 3 | VIN β Input supply voltage |
| Pin 4 | VIN β Input supply voltage |
| Pin 5 | VIN β Input supply voltage |
| Pin 6 | VIN β Input supply voltage |
| Pin 7 | VIN β Input supply voltage |
| Pin 8 | VIN β Input supply voltage |
| Pin 9 | VIN β Input supply voltage |
| Pin 10 | VIN β Input supply voltage |
| Pin 11 | VIN β Input supply voltage |
| Pin 12 | VIN β Input supply voltage |
| Pin 13 | VIN β Input supply voltage |
| Pin 14 | VIN β Input supply voltage |
| Pin 15 | VIN β Input supply voltage |
| Pin 16 | VIN β Input supply voltage |
| Pin 17 | VIN β Input supply voltage |
| Pin 18 | VIN β Input supply voltage |
| Pin 19 | VIN β Input supply voltage |
| Pin 20 | VIN β Input supply voltage |
| Pin 21 | VIN β Input supply voltage |
| Pin 22 | VIN β Input supply voltage |
| Pin 23 | VIN β Input supply voltage |
| Pin 24 | VIN β Input supply voltage |
| Pin 25 | VIN β Input supply voltage |
| Pin 26 | VIN β Input supply voltage |
| Pin 27 | VIN β Input supply voltage |
| Pin 28 | VIN β Input supply voltage |
| Pin 29 | VIN β Input supply voltage |
| Pin 30 | VIN β Input supply voltage |
| Pin 31 | VIN β Input supply voltage |
| Pin 32 | VIN β Input supply voltage |
| Pin 33 | VIN β Input supply voltage |
| Pin 34 | VIN β Input supply voltage |
| Pin 35 | VIN β Input supply voltage |
| Pin 36 | VIN β Input supply voltage |
| Pin 37 | VIN β Input supply voltage |
| Pin 38 | VIN β Input supply voltage |
| Pin 39 | VIN β Input supply voltage |
| Pin 40 | VIN β Input supply voltage |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS53315 is suitable for 6 applications: FPGA and ASIC Power Supplies, Networking and Telecom Equipment, Server and Storage Systems, Industrial Point-of-Load Converters, Consumer Electronics, Test and Measurement Equipment.
FPGA and ASIC Power Supplies
The TPS53315 provides up to 12A output current with fast transient response, making it ideal for powering FPGAs and ASICs that require low-voltage, high-current rails. Its D-CAPβ’ mode control ensures stable operation with ceramic capacitors, and the integrated MOSFETs reduce board space. For example, a Xilinx Kintex-7 FPGA core rail at 1.0V can be powered directly, with the TPS53315's 0.6V reference allowing precise voltage setting. The wide input range (4.5V-25V) accommodates intermediate bus voltages, and the power-good output simplifies sequencing.
Recommended
Networking and Telecom Equipment
In networking switches and telecom line cards, the TPS53315 efficiently steps down 12V or 24V rails to core voltages for ASICs and memory. Its high efficiency reduces thermal stress in dense boards, and the small VQFN package fits tight layouts. The integrated boost switch eliminates external components, and the D-CAPβ’ mode provides fast load transient response required by bursty network traffic. For example, a 5V rail for DDR3 memory can be generated with minimal ripple, ensuring reliable operation.
Recommended
Server and Storage Systems
The TPS53315 is well-suited for server and storage applications where high current and efficiency are critical. It can power CPU cores, memory, and I/O rails from a 12V backplane. The 12A output capability handles high-load demands, and the low RDS(on) MOSFETs minimize losses. The device's thermal performance in the VQFN package allows operation without a heatsink in many cases. For example, a 1.8V rail for SSD controllers can be efficiently generated, improving overall system power density.
Recommended
Industrial Point-of-Load Converters
In industrial automation and control systems, the TPS53315 provides a robust power solution for microcontrollers, FPGAs, and sensors. Its wide input range (4.5V-25V) accepts 24V industrial buses, and the adjustable output down to 0.6V supports low-voltage logic. The D-CAPβ’ mode ensures stable operation with ceramic capacitors, reducing BOM cost. The device's overcurrent and thermal protection enhance system reliability in harsh environments. For example, a 3.3V rail for a PLC can be generated with high efficiency.
Recommended
Consumer Electronics
The TPS53315 is used in high-performance consumer devices like gaming consoles and set-top boxes, where efficient power conversion is essential. Its small package and integrated MOSFETs save board space, and the high efficiency extends battery life in portable devices. The fast transient response handles dynamic loads from processors and graphics chips. For example, a 1.0V core rail for an application processor can be powered with minimal voltage droop, ensuring stable operation.
Recommended
Test and Measurement Equipment
In test and measurement instruments, the TPS53315 provides clean, stable power for precision analog and digital circuits. Its low output ripple and fast transient response are critical for maintaining measurement accuracy. The adjustable output allows precise voltage setting for various test conditions. The device's wide input range accommodates different power sources, and the integrated protection features ensure reliable operation. For example, a 5V rail for an oscilloscope's analog front-end can be generated with minimal noise.
Recommended
Recommended Products Summary
Engineering reference data for TPS53315 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS53314RGFR | TPS53319RGFT | TPS53515RGFT |
|---|---|---|---|---|
| Package | 40-VFQFN | 40-VFQFN | 40-VFQFN | 40-VFQFN |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 12 A | 8 A | 14 A | 12 A |
| Input Voltage Range | 4.5V to 25V | 4.5V to 25V | 4.5V to 25V | 4.5V to 25V |
| Output Voltage Range | 0.6V to 5.5V | 0.6V to 5.5V | 0.6V to 5.5V | 0.6V to 5.5V |
| Control Architecture | D-CAPβ’ | D-CAPβ’ | D-CAPβ’ | D-CAPβ’ |
| Integrated MOSFETs | Yes (19mΞ©/7mΞ©) | Yes | Yes | Yes |
| Integrated Boost Switch | Yes | Yes | Yes | Yes |
Key Differentiators
- Higher output current than TPS53314 (vs TPS53314RGFR)
- Integrated boost switch (vs TPS53314RGFR)
- Lower RDS(on) MOSFETs (vs TPS53314RGFR)
Design Notes
For optimal performance, place the input capacitors (2 x 22Β΅F ceramic) as close as possible to the VIN pins and the output capacitors (2 x 22Β΅F ceramic) near the VOUT pins. Use a solid ground plane and connect the exposed pad to the ground plane with multiple vias to enhance thermal dissipation. Keep the high-current paths short and wide to minimize parasitic inductance and resistance.
The TPS53315 in a 40-VFQFN package has a junction-to-ambient thermal resistance of approximately 25Β°C/W. At 12A output and 12V to 1.2V conversion, power dissipation is about 3.6W, resulting in a temperature rise of 90Β°C. Ensure adequate copper area and airflow to keep the junction temperature below the maximum rating. Consider using a thermal pad with multiple vias to the ground plane.
Do not operate the TPS53315 without proper output capacitance; the D-CAPβ’ mode requires a minimum of 2 x 22Β΅F ceramic capacitors for stability. Also, ensure the input voltage does not exceed 25V. Use a proper bootstrap capacitor (100nF) between the BOOT and SW pins. Avoid routing sensitive analog signals near the switching node to prevent noise coupling.
Compliance Information
RoHS compliant per TI product page. AEC-Q100 not applicable for this non-automotive part.
