TPS62228 采用小型 SOT-23 封装静态电流为 15uA 的 1.875V 400mA 输出 95% 效率步降转换器
TPS62228 描述
The TPS6222x devices are a family of high-efficiency, synchronous step-down converters ideally suited for portable systems powered by 1-cell Li-Ion or 3-cell NiMH/NiCd batteries. The devices are also suitable to operate from a standard 3.3-V or 5-V voltage rail.
With an output voltage range of 6 V down to 0.7 V and up to 400-mA output current, the devices are ideal for powering the low voltage TMS320 DSP family and processors used in PDAs, pocket PCs, and smart phones. Under nominal load current, the devices operate with a fixed switching frequency of typically 1.25 MHz. At light load currents, the part enters the power-save mode operation; the switching frequency is reduced and the quiescent current is typically only 15 µA; therefore, the device achieves the highest efficiency over the entire load current range
|
TPS62220 |
TPS62221 |
TPS62222 |
TPS62223 |
TPS62224 |
TPS62225 |
TPS62227 |
TPS62228 |
TPS62229 |
| Iout(Max)(A) |
0.4 |
0.4 |
0.4 |
0.4 |
0.4 |
0.4 |
0.4 |
0.4 |
0.4 |
| Vin(Min)(V) |
2.5 |
2.5 |
2.5 |
2.5 |
2.5 |
2.5 |
2.5 |
2.5 |
2.5 |
| Vin(Max)(V) |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
| Vout(Min)(V) |
0.7 |
1.5 |
1.8 |
2.3 |
1.6 |
2.2 |
1.2 |
1.875 |
1.7 |
| Vout(Max)(V) |
6 |
1.5 |
1.8 |
2.3 |
1.6 |
2.2 |
1.2 |
1.875 |
1.7 |
| Preset Vout(V) |
|
1.5 |
1.8 |
2.3 |
1.6 |
2.2 |
1.2 |
1.875 |
1.7 |
| Iq(Typ)(mA) |
0.015 |
0.015 |
0.015 |
0.015 |
0.015 |
0.015 |
0.015 |
0.015 |
0.015 |
| Switching Frequency(Max)(kHz) |
1850 |
1850 |
1850 |
1850 |
1850 |
1850 |
1850 |
1850 |
1850 |
| Switch Current Limit(Typ)(A) |
0.88 |
0.88 |
0.88 |
0.88 |
0.88 |
0.88 |
0.88 |
0.88 |
0.88 |
| Topology |
Buck |
Buck |
Buck |
Buck |
Buck |
Buck |
Buck |
Buck |
Buck |
| Operating Temperature Range(°C) |
-40 to 85 |
-40 to 85 |
-40 to 85 |
-40 to 85 |
-40 to 85 |
-40 to 85 |
-40 to 85 |
-40 to 85 |
-40 to 85 |
| Pin/Package |
5SOT |
5SOT |
5SOT |
5SOT |
5SOT |
5SOT |
5SOT |
5SOT |
5SOT |
| Rating |
Catalog |
Catalog |
Catalog |
Catalog |
Catalog |
Catalog |
Catalog |
Catalog |
Catalog |
| Duty Cycle(Max)(%) |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
| Regulated Outputs(#) |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
TPS62228 特性
- High-Efficiency Synchronous Step-Down Converter With up to 95% Efficiency
- 2.5-V to 6-V Input Voltage Range
- Adjustable Output Voltage Range From 0.7 V to VI
- Fixed Output Voltage Options Available
- Up to 400-mA Output Current
- 1.25-MHz Fixed Frequency PWM Operation
- Highest Efficiency Over Wide Load Current Range Due to Power-Save Mode
- 15 µA Typical Quiescent Current
- Soft Start
- 100% Duty Cycle Low-Dropout Operation
- Dynamic Output-Voltage Positioning
- Available in TSOT23 Package
- APPLICATIONS
- PDAs and Pocket PC
- Cellular Phones, Smart Phones
- OMAP™ and Low Power DSP Supply
- Digital Cameras
- Portable Media Players
- Portable Equipment
- WLAN PC Cards
TPS62228 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| TPS62228DDCR |
ACTIVE |
-40 to 85 |
0.95 | 1ku |
SOT (DDC) | 5 |
3000 | LARGE T&R |
ALN |
| TPS62228DDCRG4 |
ACTIVE |
-40 to 85 |
0.95 | 1ku |
SOT (DDC) | 5 |
3000 | LARGE T&R |
ALN |
| TPS62228DDCT |
ACTIVE |
-40 to 85 |
1.05 | 1ku |
SOT (DDC) | 5 |
250 | SMALL T&R |
ALN |
| TPS62228DDCTG4 |
ACTIVE |
-40 to 85 |
1.05 | 1ku |
SOT (DDC) | 5 |
250 | SMALL T&R |
ALN |
TPS62228 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| TPS62228DDCR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
TPS62228DDCR |
| TPS62228DDCRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
TPS62228DDCRG4 |
TPS62228DDCRG4 |
| TPS62228DDCT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
TPS62228DDCT |
| TPS62228DDCTG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
TPS62228DDCTG4 |
TPS62228DDCTG4 |
TPS62228 应用技术支持与电子电路设计开发资源下载
- TPS62228 数据资料 dataSheet 下载.PDF
- TI 德州仪器非隔离式开关 DC/DC 调节器选型与价格参考 . xls
- Dual MOSFET Driver
(PDF 498 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- Understanding Boost Power Stages In Switchmode Power Supplies
(PDF 149 KB)
- Understanding Buck Power Stages In Switchmode Power Supplies
(PDF 173 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
TPS62228 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| TPS62228 评估模块 |
TPS62228EVM-014 |
Texas Instruments |
开发电路板/EVM |
| SwitcherPro(TM) 开关电源设计工具 |
SWITCHERPRO |
Texas Instruments |
应用软件 |
TPS62228 参考设计
| 说明 |
型号 |
公司 |
| LDO、降压/升压、2 相同步降压、同步升压参考设计 |
PR038 |
Texas Instruments |
| 以太网电源 - 同步反向参考设计 |
PMP386 |
Texas Instruments |
| 同步 降压，两个输入电压 4.5-5.5V 的升压 多输出电压 3.3V、5V 和 12V |
PMP146 |
Texas Instruments |
| 降压/升压参考设计 |
PMP379 |
Texas Instruments |
