TPS53355
- Alternative product available: LMZ31530 14.5-V, 30-A step-down power module in 15 × 16 × 5.8-mm QFN package
- 96% maximum efficiency
- Conversion input voltage range: 1.5 V to 15 V
- VDD input voltage range: 4.5 V to 25 V
- Output voltage range: 0.6 V to 5.5 V
- 5-V LDO output
- Supports single rail input
- Integrated power MOSFETs with 30 A of continuous output current
- Auto-skip Eco-mode™ for light-load efficiency
- < 10-µA shutdown current
- D-CAP™ mode with fast transient response
- Selectable switching frequency from 250 kHz to 1 MHz with external resistor
- Selectable auto-skip or PWM-only operation
- Built-in 1% 0.6-V reference
- 0.7-ms, 1.4-ms, 2.8-ms, and 5.6-ms selectable internal voltage servo soft start
- Integrated boost switch
- Precharged start-up capability
- Adjustable overcurrent limit with thermal compensation
- Overvoltage, undervoltage, UVLO and overtemperature protection
- Supports all ceramic output capacitors
- Open-drain power-good indication
- Incorporates NexFET™ power block technology
- 22-pin QFN package With PowerPAD™
- For SWIFT™ power products documentation, see http://www.ti.com/swift
- Green (RoHS compatible) is optional
- Create a custom design using the TPS53355 with the WEBENCH Power Designer
The TPS53355 is a D-CAP™ mode, 30-A synchronous switcher with integrated MOSFETs. It is designed for ease of use, low external component count, and space-conscious power systems.
This device features 5-mΩ/2-mΩ integrated MOSFETs, accurate 1% 0.6-V reference, and integrated boost switch. A sample of competitive features include: 1.5-V to 15-V wide conversion input voltage range, very low external component count, D-CAP™ mode control for super fast transient, auto-skip mode operation, internal soft-start control, selectable frequency, and no need for compensation.
The conversion input voltage ranges from 1.5 V to 15 V, the supply voltage range is from 4.5 V to 25 V, and the output voltage range is from 0.6 V to 5.5 V.
The device is available in 6-mm × 5-mm, 22-pin QFN package.
The LMZ31530 integrates the TPS53355, an inductor, and other passive components into a small, easy-to-use module.
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設計與開發
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TPS53355 上置電感降壓式（降壓）轉換器設計透過減少 X-Y PCB 面積實現了高功率密度，效率超過 86%，功率損耗僅為 1.8W，輸出電壓漣波僅為 6mV，僅需 5x100uF 陶瓷輸出電容器。
TIDA-00510 — 具有上置電感器的高功率密度 12Vin、100W 同步 DC/DC 降壓式降壓轉換器
TPS53355 上置電感降壓式（降壓）轉換器設計透過將輸出電感器放置在 IC 頂部來減少 X-Y PCB 面積，從而實現高功率密度，並且對於 66W 和 100W 輸出功率設計（3.3V 和 5V 輸出），僅需 4x100µF 陶瓷輸出電容即可達到 92% 的最低效率。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| LSON-CLIP (DQP) | 22 | Ultra Librarian |
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