TPS51123 双路同步降压控制器，具有 Out-of-Audio 操作和用于笔记本电脑系统的 100mA LDO Pwr
TPS51123 描述
The TPS51123 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 TPS51123 supports high efficiency, fast transient responses and provides a combined power-good signal. Out-of-Audio mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. Adaptive on-time D-CAP control provides convenient and efficient operation. The part operates with supply input voltages ranging from 5.5 V to 28 V and supports output voltages from 2 V to 5.5 V. The TPS51123 is available in a 24-pin QFN package and is specified from -40°C to 85°C ambient temperature range.
|
TPS51120 |
TPS51123 |
TPS51124 |
TPS51125A |
TPS51220 |
TPS51220A |
| Topology |
Buck,D-CAP™ Mode |
Buck,D-CAP™ Mode |
Buck,D-CAP™ Mode |
Buck,D-CAP™ Mode |
Buck,D-CAP™ Mode |
Buck,D-CAP™ 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 |
TPS51123 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-Audio™ 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)
- 24-Pin QFN (RGE) Package
- APPLICATIONS
- Notebook Computers
- I/O Supplies
- System Power Supplies
TPS51123 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 |
| TPS51123RGER |
ACTIVE |
-40 to 85 |
2.15 | 1ku |
VQFN (RGE) | 24 |
3000 | LARGE T&R |
51123 |
| TPS51123RGET |
ACTIVE |
-40 to 85 |
2.40 | 1ku |
VQFN (RGE) | 24 |
250 | SMALL T&R |
51123 |
TPS51123 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 |
| TPS51123RGER |
Green (RoHS & no Sb/Br) |
Call TI |
Level-2-260C-1 YEAR |
|
TPS51123RGER |
| TPS51123RGET |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
TPS51123RGET |
TPS51123 应用技术支持与电子电路设计开发资源下载
- TPS51123 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)
TPS51123 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| 8A、8V 至 25V 输入、5V 和 3.3V 输出双路同步控制器评估模块 |
TPS51123EVM-399 |
Texas Instruments |
开发电路板/EVM |
TPS51123 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 |
