TPS54900 可编程四通道步降 DC/DC 转换器
|
TPS54900 |
| Iout(Max)(A) |
0.1 |
| Iout2(Max)(A) |
0.1 |
| Vin(Min)(V) |
15 |
| Vin(Max)(V) |
15 |
| Vout(Min)(V) |
7.5 |
| Vout(Max)(V) |
13.1 |
| Iq(Typ)(mA) |
0.7 |
| Switching Frequency(Max)(kHz) |
450 |
| Switch Current Limit(Typ)(A) |
0.25 |
| Topology |
Buck |
| Operating Temperature Range(°C) |
-40 to 85 |
| Pin/Package |
16TSSOP |
| Rating |
Catalog |
| Duty Cycle(Max)(%) |
90 |
| Regulated Outputs(#) |
2 |
| Thermal Shutdown |
yes |
TPS54900 描述
The TPS54900 four-channel step-down converter uses voltage mode PWM control to provide four independently programmable output voltages. Each regulated channel includes a high-side PMOSFET switch with a typical rDS(ON) of 0.8 Ω, which makes it suitable for high efficiency, low current applications. Commands sent to the TPS54900 over the four wire serial port programs the outputs independently or globally to supply voltages from 7.5 V to 13.1 V in 0.4-V increments. When the input voltage is desired at an output, a bypass mode can be activated which fully enhances the PMOSFET switch and disables the switching circuitry of the selected channel.
The TPS54900 is an ideal companion device to power THS7102 ADSL line drivers as a part of the AC5 central office ADSL chipset
TPS54900 特性
- Four Independent 100-mA Channels Programmable Over 4-Wire Serial Port
- Converter Regulation Range: 7.5 V to 13.1 V in 400-mV Steps, Plus Unregulated Pass-Through Mode to Shunt VIN to any Output
- Internally Compensated PWM Controller and Integrated PMOS Power Switches
- Global and Per Channel Status Available Through Serial Port
- External Synchronization of PWM With System Clock
- Per Channel Current Limit and Global Thermal Shutdown
- -40°C to 85°C Ambient Temperature Range
- APPLICATIONS
- ADSL Central Office Line Drivers
- Software Line Card Provisioning
TPS54900 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 |
| TPS54900PW |
ACTIVE |
-40 to 85 |
8.60 | 1ku |
TSSOP (PW) | 16 |
90 | TUBE |
54900 |
| TPS54900PWG4 |
ACTIVE |
-40 to 85 |
8.60 | 1ku |
TSSOP (PW) | 16 |
90 | TUBE |
54900 |
TPS54900 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 |
| TPS54900PW |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
TPS54900PW |
| TPS54900PWG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
TPS54900PWG4 |
TPS54900 应用技术支持与电子电路设计开发资源下载
- TPS54900 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)
TPS54900 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| 9A、3V 至 4V 输入电压 SWIFT™ 转换器评估模块 |
TPS54900EVM-367 |
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 |
TPS54900 参考设计
| 说明 |
型号 |
公司 |
| 3-A, 600-kHz Dual Wide-Input Buck Converter |
PMP2808 |
Texas Instruments |
