TPS53315 - 12A D-CAP Buck Regulator | Texas Instruments
MPN： TPS53315RGFR ✓ 啟用中TPS53315RGFR 概覽
A buck converter is a type of switching DC-DC regulator that efficiently reduces a higher voltage to a lower one. The TPS53315 belongs to the synchronous buck family, using both high-side and low-side MOSFETs for high efficiency, and sits within the broader power management IC hierarchy for point-of-load conversion.
Key features include 12-A continuous output current, integrated 19-mOhm high-side and 7-mOhm low-side MOSFETs that minimize conduction losses, an accurate 1% 0.6-V reference, and an integrated boost switch that removes the external bootstrap diode. D-CAP control delivers fast load transient response without external compensation and is stable with ceramic output capacitors.
Technically, the proprietary D-CAP architecture combines constant on-time control with adaptive on-time, enabling low output ripple and fast transient behavior. Overcurrent protection, thermal shutdown, and a power-good indicator improve system robustness. The exposed-pad VQFN package provides thermal performance around 25 C/W junction-to-ambient per internal data.
Typical applications include point-of-load power for FPGAs, ASICs, and DSPs, as well as server, storage, networking, industrial, and telecom power rails where high efficiency and small size matter.
Design tip: use at least 2 x 22 uF ceramic output capacitance for stability and pay careful attention to PCB layout of the power stage and exposed pad for thermal dissipation.
直接替換替代品，適用於 TPS53315RGFR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
TPS53319
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS53314
✅ 直接替換📋 參考替代品（不在目錄中）
TPS51315
⚡ 相同封裝📋 參考替代品（不在目錄中）
IR3889MTRPBF
⚡ 相同封裝 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →TPS53315RGFR 最大額定值與電氣特性
| 拓撲 | Synchronous Step-Down (Buck) with D-CAP control |
| 最大輸出電流 | 12 A |
| Supply Voltage Range | 4.5 V to 25 V |
| Conversion Input Voltage Range | 3 V to 15 V |
| 輸出電壓範圍 | 0.6 V to 5.5 V (adjustable) |
| Reference Accuracy | 1% |
| 參考電壓 | 0.6 V |
| High-Side MOSFET RDS(on) | 19 mOhm |
| Low-Side MOSFET RDS(on) | 7 mOhm |
| 輸出數量 | 1 |
| Control Mode | D-CAP (adaptive constant on-time) |
| Integrated Boost Switch | Yes |
| Protections | Overcurrent, thermal shutdown, power-good indicator |
| 工作溫度 | -40C to +85C |
| 封裝 | 40-VFQFN exposed pad, 5 mm x 7 mm (RGF) |
| Thermal Resistance (JA) | 25 C/W |
| Minimum Output Capacitance | 2 x 22 uF ceramic |
| 安裝類型 | Surface Mount |
TPS53315RGFR 40-vfqfn exposed pad, 5 mm x 7 mm (rgf) 腳位配置指南
TPS53315RGFR（40-vfqfn exposed pad, 5 mm x 7 mm (rgf) 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： TPS53315RGFR.
請參閱 資料表 以查看完整腳位配置。
典型應用
TPS53315RGFR 適用於 6 應用s: FPGA / ASIC Point-of-Load Power, Server and Datacenter Power, Networking Equipment, Industrial Control Systems, Telecom Power Distribution, Test and Measurement Instruments.
FPGA / ASIC Point-of-Load Power
The TPS53315 fits FPGA and ASIC point-of-load rails because its 12-A continuous current and 0.6-V to 5.5-V adjustable output cover both core and I/O voltage needs, while the 1% 0.6-V reference supports tight core-voltage tolerance windows. Its D-CAP adaptive constant-on-time control reacts to FPGA load steps within microseconds without external compensation, minimizing droop on high di/dt cores. Placed downstream of a 12-V intermediate bus with 2 x 22 uF ceramic output capacitance, it supplies a clean core rail; ensure PCB copper area on the exposed pad to dissipate losses in the 19-mOhm and 7-mOhm integrated FETs at full load.
推薦
Server and Datacenter Power
In servers, storage, and datacenter boards, dense point-of-load converters must deliver high current in minimal area. The TPS53315's integrated 19-mOhm/7-mOhm MOSFETs and 5 mm x 7 mm VQFN reduce BOM count and PCB footprint versus a discrete controller-plus-FET design, while D-CAP control maintains regulation through CPU, memory, and NIC load transients. Its 4.5-V to 25-V supply range accepts common 12-V intermediate bus rails directly. The integrated boost switch eliminates the bootstrap diode, improving reliability and saving board space; thermal shutdown and power-good flags simplify system health monitoring in racked equipment.
推薦
Networking Equipment
Switch, router, and optical line cards need efficient 12-V-to-low-voltage conversion with fast transient response for serializer and traffic-processor loads. The TPS53315 converts a 12-V distribution rail down to 0.6-V to 5.5-V points of load at up to 12 A with high efficiency, thanks to its low RDS(on) integrated FETs. D-CAP operation remains stable with all-ceramic output capacitors, reducing board height and improving reliability for fanless designs. The power-good output enables fault aggregation into the line-card management circuit, while the -40C to +85C industrial range suits remote and outdoor telecom cabinets.
推薦
Industrial Control Systems
Industrial PLC, motor-control, and automation boards require robust 12-V derived supplies tolerant of wide input variation. The TPS53315 accepts 4.5-V to 25-V supply and 3-V to 15-V conversion inputs, riding through bus sag while delivering a stable 12-A point-of-load rail for DSPs such as C2000 controllers and interface electronics. Overcurrent protection and thermal shutdown guard against fault conditions in harsh environments. Its D-CAP topology needs no compensation network, shortening design cycles for platform variations. Locate the exposed thermal pad over at least one square inch of copper to keep junction temperature within limits at high ambient temperatures.
推薦
Telecom Power Distribution
Telecom systems distributing power from -48-V or intermediate 12-V buses benefit from the TPS53315's single-rail input support and 3-V to 15-V conversion range. It provides tightly regulated, low-noise digital rails for baseband processors, network processors, and FPGA fabric at currents up to 12 A. The 1% reference accuracy supports narrow-voltage-tolerance ASICs, and D-CAP fast transient response handles bursty packet-processing loads without large output capacitor banks. The integrated boost switch and MOSFETs reduce component count for long-life designs where reliability and serviceability dominate over unit cost.
推薦
Test and Measurement Instruments
Bench instruments and automated test equipment need efficient, adjustable supplies for processor and interface boards. The TPS53315's 0.6-V to 5.5-V adjustable output lets one regulator design serve multiple board revisions and voltage targets by changing a feedback divider, while 12-A capability covers DSP and FPGA subsystem loads. D-CAP control delivers clean transient behavior with ceramic-only output filtering, reducing acoustic and EMI concerns versus higher-ripple designs. Its compact VQFN footprint frees board area for measurement front-end circuitry, and thermal shutdown provides a final protection layer in long-duration soak-test operation.
推薦
推薦產品摘要
工程參考資料，適用於 TPS53315RGFR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TPS53319 | TPS53314 | TPS51315 | IR3889MTRPBF |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Infineon |
| Package | 40-VFQFN (RGF), 5x7 mm | 40-VFQFN (RGF) - same family | 40-VFQFN (RGF) - same family | 40-VFQFN (RGF) - same family | PQFN similar footprint - verify pin map |
| Output Current | 12 A | Higher (15 A class) | Lower (8 A class) | 12 A class | 12 A class |
| Control Mode | D-CAP (adaptive COT) | D-CAP | D-CAP | D-CAP class | Proprietary COT |
| Integrated Boost Switch | Yes | Yes | Yes | Yes | Yes |
| Lifecycle Status | Active | Active | Active | Active | Active |
主要差異化特點
- Higher output current in same footprint (對比TPS53314)
- Integrated 19/7 mOhm FET pair (對比Discrete controller designs)
- D-CAP control without compensation (對比IR3889MTRPBF)
設計說明
Size the power stage for the 12-A load: with 19-mOhm high-side and 7-mOhm low-side FETs, conduction losses are roughly I^2 x 0.026 Ohm shared across both devices. At full load, budget approximately 2-3 W of loss in the IC plus inductor copper loss. Verify the output inductor saturation rating exceeds the D-CAP current-limit threshold, not just the 12-A continuous rating, and provide at least 2 x 22 uF of effective ceramic capacitance at VOUT for loop stability.
The 5x7 mm VQFN relies on its exposed pad for heat removal; internal data indicates roughly 25 C/W theta-JA on a good board. Connect the exposed pad to an array of thermal vias into a 1-2 oz ground plane of at least one square inch. At 12 A and VIN-VOUT of 12 V to 1 V, junction rise can exceed 50 C - verify junction temperature stays under the datasheet maximum at worst-case load and 85 C ambient.
Minimize the PHASE node loop area: place input ceramic capacitors directly across VIN and PGND with the shortest possible connection to the IC, and keep the inductor adjacent to PHASE. Route the VOS/VFB sense lines away from the switch node as a Kelvin connection at the output capacitor. Keep the bootstrap capacitor close to BST and PHASE. Follow TI datasheet layout guidelines (TPS53315 datasheet, PCB layout section) for the 40-pin VQFN (RGF) footprint.
合規資訊
Compliance data not present in provided sources; verify on TI product page quality/environmental section.
