TPS53355DQPR - 30A Sync Buck Converter 1.5-15V | TI
料号： TPS53355DQPR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.85 | $7.85 |
| 10 | $7.07 | $70.70 |
| 100 | $6.28 | $628.00 |
| 500 | $5.5 | $2,750.00 |
| 1,000 | $4.71 | $4,710.00 |
TPS53355DQPR 概述
A synchronous buck converter is a DC-DC switching regulator that uses two internally integrated MOSFETs and an external inductor to step a higher input voltage down to a lower, tightly regulated output voltage. Buck regulators form the core of modern point-of-load power management hierarchies, converting intermediate distribution rails (such as 12 V) into the low voltages required by processors, FPGAs, and memory, with far higher efficiency than linear regulators.
Key features include the D-CAP control topology, which requires no external compensation network and delivers excellent load transient response, plus TI eco-mode technology that reduces switching frequency at light load to maintain high efficiency across the full load range. The internal 5-mOhm/2-mOhm MOSFET pair minimizes conduction losses at full 30-A output, while the accurate 1% 0.6-V internal reference supports low-voltage core rails. An integrated boost switch eliminates an external bootstrap diode.
Technically, the device supports adjustable switching frequency (250 kHz to 1 MHz), adjustable current limit with thermal shutdown protection, and flexible soft-start control. The wide 1.5-V to 15-V conversion input allows direct operation from 12-V intermediate bus rails as well as 5-V and lower rails.
Typical applications include server and network processor core power, point-of-load supplies for FPGAs, ASICs, and DDR memory, telecom and datacenter power stages, and distributed power systems where a compact 30-A stage with minimal external components is required.
Design consideration: at 30-A output the power stage dissipation is dominated by conduction losses, so a solid PCB thermal layout with generous copper pour on the exposed thermal pad is essential for reliable continuous operation.
This page synthesizes distributor availability data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： TPS53355DQPR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TPS53355DQPR （相同外形与封装尺寸） ——差异在于 Package, Topology, Continuous Output Current, Control Mode, Input Voltage Range.
快速对比工具——选择替代料号进行并排对比：
TPS53355DQPT
✅ 直接替换📋 参考替代料（不在目录中）
TPS53319DQPR
✅ 直接替换📋 参考替代料（不在目录中）
TPS53353DQPR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS53355DQPR 最大额定值与电气特性
| 拓扑 | Synchronous Buck (Step-Down) |
| Control Topology | D-CAP mode with eco-mode |
| 输入电压范围 | 1.5 V to 15 V |
| 输出电压范围 | 0.6 V to 5.5 V (adjustable) |
| 最大输出电流 | 30 A |
| Output Voltage Reference | 0.6 V, 1% accuracy |
| Integrated High-Side MOSFET Rds(on) | 5 mOhm |
| Integrated Low-Side MOSFET Rds(on) | 2 mOhm |
| 开关频率 | Adjustable, 250 kHz to 1 MHz |
| 输出数量 | 1 |
| 静态电流 | 0.32 mA (typ) |
| Integrated Boost Switch | Yes |
| 限流 | Adjustable |
| 封装 | 22-PowerLFDFN (DQP), 6 mm x 5 mm |
| 安装类型 | Surface Mount |
| 特性 | Eco-mode, adjustable current limit, thermal shutdown |
TPS53355DQPR 22-powerlfdfn (dqp), 6 mm x 5 mm 引脚配置指南
TPS53355DQPR（22-powerlfdfn (dqp), 6 mm x 5 mm 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： TPS53355DQPR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TPS53355DQPR 适用于 6 应用s: Server and Processor Core Power, FPGA and ASIC Point-of-Load Power, Telecom and Datacenter Power Distribution, Industrial Automation and Motor Controller Logic Power, DDR Memory Power Supply, Distributed Power in Storage and Network Appliances.
Server and Processor Core Power
The TPS53355DQPR fits server CPU and network processor core power stages because modern processors demand 20-30 A rails with millivolt-level accuracy and nanosecond load-step response. Its D-CAP topology responds to transient load changes without external compensation, and the 1% 0.6-V reference supports low core voltages directly. In a typical 12-V intermediate bus design, the converter steps 12 V down to sub-1-V core rails with integrated 5-mOhm/2-mOhm MOSFETs minimizing conduction loss. Eco-mode keeps standby efficiency high when the processor enters sleep states, and the compact 6-mm x 5-mm QFN conserves the dense board space typical of server motherboards.
推荐
FPGA and ASIC Point-of-Load Power
For FPGA and ASIC point-of-load conversion, the TPS53355DQPR provides the high transient current these devices draw during simultaneous switching. The 30-A rating covers mid-range FPGA cores, and the adjustable 250-kHz to 1-MHz frequency lets designers optimize inductor size versus efficiency on space-limited boards. Because the MOSFETs and boost switch are integrated, the external solution requires only an inductor, a few capacitors, and resistors, which reduces BOM complexity compared with a controller-plus-external-FET approach. Adjustable current limit also protects expensive ASICs during fault conditions, and the power-good monitoring simplifies power-sequencing implementation with upstream controllers in multi-rail systems.
推荐
Telecom and Datacenter Power Distribution
Telecom base stations and datacenter racks commonly distribute 12 V on an intermediate bus, exactly matching the 15-V maximum input of the TPS53355DQPR. The device steps this bus down to 3.3-V, 2.5-V, or 1.x-V logic rails for line cards, switch ASICs, and memory subsystems. Its eco-mode maintains efficiency at the low utilization factors typical of telecom equipment that spends much of its life at partial load, reducing thermal design burden in sealed enclosures. The 6-mm x 5-mm QFN with exposed pad supports the high board density of ATCA and similar carrier cards, while adjustable current limit enables safe hot-swap behavior under upstream ORing controllers.
推荐
Industrial Automation and Motor Controller Logic Power
Industrial drives, PLCs, and motion controllers need robust 12-V-derived logic rails that tolerate wide input excursions; the 1.5-V to 15-V input range of the TPS53355DQPR covers unregulated industrial bus variations. Its 30-A capacity also directly powers the gate-driver supply stages of larger drives, and the adjustable current limit allows coordination with upstream protection. The D-CAP loop remains stable with low-ESR ceramic output capacitors, and thermal shutdown provides a last-line safeguard in high-ambient cabinets. The integrated-MOSFET design removes the gate-drive layout sensitivity that external-FET solutions require, improving manufacturability in high-volume industrial boards.
推荐
DDR Memory Power Supply
High-density DDR3/DDR4 memory arrays draw tens of amps of low-voltage rail current with sharp burst transients during read/write bursts, a profile matched to the 30-A capability and fast D-CAP transient response of the TPS53355DQPR. The 1% reference accuracy keeps VDD within JEDEC memory tolerance windows even with resistor-divider tolerance included, improving margin. At 1.5-V input the converter operates with low duty cycle and excellent efficiency using the 2-mOhm low-side FET. Designers typically set the switching frequency near 500 kHz to balance ripple and transient response, and eco-mode reduces quiescent losses when the memory controller enters self-refresh.
推荐
Distributed Power in Storage and Network Appliances
SSD arrays, storage controllers, and network appliances populate boards with many point-of-load converters; the TPS53355DQPR serves the heavy central rails while smaller SWIFT parts feed peripheral loads. Its high integration reduces total solution footprint - TI notes the part is designed for ease of use, low external component count, and space-conscious power systems. Adjustable switching frequency avoids beat-frequency interference among multiple converters on the same board by letting designers stagger frequencies. The same 6-mm x 5-mm QFN footprint is shared across the TPS533xx family, allowing one PCB land pattern to serve several current ratings and simplifying logistics in appliance mass production.
推荐
推荐产品汇总
工程参考数据： TPS53355DQPR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TPS53355DQPT | TPS53319DQPR | TPS53353DQPR |
|---|---|---|---|---|
| Package | 22-PowerLFDFN (DQP), 6 mm x 5 mm | 22-PowerLFDFN (DQP), 6 mm x 5 mm - same | 22-PowerLFDFN (DQP), 6 mm x 5 mm - same | 22-PowerLFDFN (DQP), 6 mm x 5 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Maximum Output Current | 30 A | 30 A | Lower rating (verify datasheet) | Lower rating (verify datasheet) |
| Control Topology | D-CAP mode with eco-mode | D-CAP mode with eco-mode | D-CAP mode | D-CAP mode |
关键差异点
- Highest output current in footprint family （对比 TPS53319DQPR)
- Fully integrated power stage （对比 TPS53353DQPR)
- Eco-mode light-load efficiency （对比 TPS53319DQPR)
设计说明
At 30-A continuous output, conduction loss in the integrated 5-mOhm high-side and 2-mOhm low-side MOSFETs dominates total dissipation. Estimated: at Iout = 30 A, I-squared-R loss reaches approximately 1.35 W on the high-side and 0.54 W on the low-side FET (using R-squared-I arithmetic with those Rds(on) values), plus switching losses that scale with frequency and input voltage. The exposed thermal pad must connect to a minimum 1-square-inch copper pour with an array of thermal vias; without it, the junction will exceed safe limits at full load.
Follow the layout guidelines in the TI TPS53355 datasheet: keep the input capacitor loop as small as possible because it carries pulsed switching current; place the inductor close to the SW pin; route the VOSNS feedback sense lines as a Kelvin pair directly to the output capacitor, not to a high-current trace. The DQP package's thermal pad should have a 5x5 via array filling the pad area. Poor Kelvin sensing is the most common cause of output-voltage droop under load in 30-A designs.
Do not exceed the 15-V maximum input, and account for input transient spikes when the converter is fed from long inductive wiring. Choose output capacitors whose ESR region keeps the D-CAP loop stable - excessively low-ESR pure ceramic banks may need a small series resistor per TI application guidance. The frequency-set resistor also affects current-limit behavior, so re-verify current limit after any frequency change rather than assuming the default remains valid.
合规信息
Compliance status was not explicitly stated in the retrieved web data. Obtain the official material declaration from the TI quality/environmental portal for regulatory documentation.
