TPS62321 - 采用 QFN 或芯片级封装的 1.5V、500mA、3MHz 步降转换器

TPS62321是TI德州仪器公司的一款转换器（集成开关）产品，TPS62321是采用 QFN 或芯片级封装的 1.5V、500mA、3MHz 步降转换器，本站介绍了TPS62321的封装应用图解、特点和优点、功能等，并给出了与TPS62321相关的TI元器件型号供参考。

TPS62321 - 采用 QFN 或芯片级封装的 1.5V、500mA、3MHz 步降转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The TPS623xx device is a high-frequency synchronous step-down dc-dc converter optimized for battery-powered portable applications. Intended for low-power applications, the TPS623xx supports up to 500-mA load current and allows the use of tiny, low cost chip inductor and capacitors.

The device is ideal for mobile phones and similar portable applications powered by a single-cell Li-Ion battery or by 3-cell NiMH/NiCd batteries. With an output voltage range from 5.4 V down to 0.6 V, the device supports the low-voltage TMS320 DSP family, processors in smart-phones, PDAs as well as notebooks, and handheld computers.

The TPS62300 operates at 3-MHz fixed switching frequency and enters the power-save mode operation at light load currents to maintain high efficiency over the entire load current range. For low noise applications, the device can be forced into fixed frequency PWM mode by pulling the MODE/SYNC pin high. The device can also be synchronized to an external clock signal in the range of 3 MHz. In the shutdown mode, the current consumption is reduced to less than 1 µA.

The TPS623xx is available in a 10-pin leadless package (3 × 3 mm QFN) and an 8-pin chip-scale package (CSP).

产品特性

Up to 93% Efficiency at 3-MHz Operation
Up to 500-mA Output Current at VI = 2.7 V
3-MHz Fixed Frequency Operation
Best in Class Load and Line Transient
Complete 1-mm Component Profile Solution
–0.5%/+1.3% PWM DC Voltage Accuracy Over Temperature
35-ns Minimum On-Time
Power-Save Mode Operation at Light Load Currents
Fixed and Adjustable Output Voltage
Only 86-µA Quiescent Current
100% Duty Cycle for Lowest Dropout
Synchronizable On the Fly to External Clock Signal
Integrated Active Power-Down Sequencing (TPS6232x only)
Available in a 10-Pin QFN (3 × 3 mm), 8-Pin NanoFree™, and NanoStar™ (CSP) Packaging
APPLICATIONS
- Cell Phones, Smart-Phones
- WLAN and Bluetooth™ Applications
- Micro DC-DC Converter Modules
- PDAs, Pocket PCs
- USB-Based DSL Modems
- Digital Cameras

NanoFree, NanoStar, TMS320 are trademarks of Texas Instruments. Bluetooth is a trademark of Bluetooth SIG, Inc. PowerPAD is a trademark of Texas Instruments.

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