TPS51125A 具有 Out-of-Audio 操作和 100mA LDO 的双路同步降压控制器
TPS51125A 描述
The TPS51125A is a cost effective, dual-synchronous buck controller targeted for notebook system power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components. The 270-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter’s efficiency. The TPS51125A supports high efficiency, fast transient response and provides a combined power-good signal. Out-of-AudioTM mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. Adaptive on-time D-CAPTM control provides convenient and efficient operation. The part operates with supply input voltages ranging from 5.
|
TPS51120 |
TPS51123 |
TPS51124 |
TPS51125A |
TPS51220 |
TPS51220A |
| Topology |
Buck,D-CAPTM Mode |
Buck,D-CAPTM Mode |
Buck,D-CAPTM Mode |
Buck,D-CAPTM Mode |
Buck,D-CAPTM Mode |
Buck,D-CAPTM Mode |
| Vin(Min)(V) |
4.5 |
5.5 |
3 |
5.5 |
4.5 |
4.5 |
| Vin(Max)(V) |
28 |
28 |
28 |
28 |
28 |
32 |
| Vout(Min)(V) |
1.05 |
2.0 |
0.76 |
2 |
1 |
1 |
| Vout(Max)(V) |
5.5 |
5.5 |
5.5 |
5.5 |
12 |
12 |
| Regulated Outputs(#) |
2 |
2 |
2 |
2 |
2 |
2 |
| Iout(Max)(A) |
20 |
20 |
15 |
20 |
20 |
20 |
| Switching Frequency(Max)(kHz) |
580 |
460 |
420 |
460 |
1000 |
1000 |
| Iq(Typ)(mA) |
0.75 |
0.55 |
0.35 |
0.55 |
1.3 |
1.3 |
| Pin/Package |
32QFN |
24VQFN |
24VQFN |
24VQFN |
32QFN |
32QFN |
| Thermal Shutdown |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
| Vout2(Min)(V) |
1.05 |
2.0 |
0.76 |
2 |
1 |
1 |
| Vout2(Max)(V) |
5.5 |
5.5 |
5.5 |
5.5 |
12 |
12 |
| Iout2(A) |
20 |
20 |
20 |
20 |
20 |
20 |
| Rating |
Catalog |
Catalog |
Catalog |
Catalog |
Catalog |
Catalog |
| Duty Cycle(Max)(%) |
88 |
93 |
88 |
93 |
99 |
99 |
TPS51125A 特性
- Wide Input Voltage Range: 5.5 V to 28 V
- Output Voltage Range: 2 V to 5.5 V
- Built-in 100-mA 5-V/3.3-V LDO with Switches
- Built-in 1% 2-V Reference Output
- With/Without Out-of-AudioTM Mode Selectable
Light Load and PWM only Operation
- Internal 1.6-ms Voltage Servo Softstart
- Adaptive On-Time Control Architecture with
Four Selectable Frequency Setting
- 4500 ppm/°C RDS(on) Current Sensing
- Built-In Output Discharge
- Power Good Output
- Built-in OVP/UVP/OCP
- Thermal Shutdown (Non-latch)
- QFN24 (RGE)
- APPLICATIONS
- Notebook Computers
- I/O Supplies
- System Power Supplies
TPS51125A 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 |
| TPS51125ARGER |
ACTIVE |
-40 to 85 |
2.15 | 1ku |
VQFN (RGE) | 24 |
3000 | LARGE T&R |
51125A |
| TPS51125ARGET |
ACTIVE |
-40 to 85 |
2.40 | 1ku |
VQFN (RGE) | 24 |
250 | SMALL T&R |
51125A |
TPS51125A 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 |
| TPS51125ARGER |
Green (RoHS & no Sb/Br) |
Call TI |
Level-2-260C-1 YEAR |
|
TPS51125ARGER |
| TPS51125ARGET |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
TPS51125ARGET |
TPS51125A 应用技术支持与电子电路设计开发资源下载
- TPS51125A 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)
TPS51125A 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| 使用 TPS51125A 的高性能同步降压评估模块 |
TPS51125AEVM |
Texas Instruments |
开发电路板/EVM |
TPS51125A 参考设计
| 说明 |
型号 |
公司 |
| 二相同步 降压，输入电压为 5V 或 12V。 多路输出电压：1.8V 和 3.3V |
PMP176 |
Texas Instruments |
| 同步降压时，输入电压为 19.5V |
PMP070 |
Texas Instruments |
| 同步降压，输入电压为 12V |
PMP217 |
Texas Instruments |
| 热插拔、推挽、同步 降压、负反向、双路同步 降压参考设计 |
PMP156 |
Texas Instruments |
| 集成 FET、正向、双路同步的同步降压 降压参考设计 |
PMP041 |
Texas Instruments |