TPS54291 4.5V 到 18V 输入、1.5/2.5A、600kHz 双路同步降压 SWIFT™ 转换器
TPS54291 描述
TPS54290/1/2 is a dual output fully synchronous buck converter capable of supporting applications with a minimal number of external components. It operates from a 4.5 V to 18 V input supply voltage, and supports output voltages as low as 0.8 V and as high as 90% of the input voltage.
Both high-side and low-side MOSFETs are integrated to provide fully synchronous conversion with higher efficiency. Channel1 can provide up to 1.5 A of continuous current, meanwhile, Channel2 supports up to 2.5 A.
Current mode control simplifies the compensation. The external compensation adds flexibility for the user to choose different type of output capacitors.
180° out-of-phase operation reduces the ripple current through the input capacitor, providing the benefit of reducing input capacitance, alleviating EMI and increasing capacitor life.
|
TPS54290 |
TPS54291 |
TPS54292 |
| Iout(Max)(A) |
2.5 |
2.5 |
2.5 |
| Iout2(Max)(A) |
1.5 |
1.5 |
1.5 |
| Vin(Min)(V) |
4.5 |
4.5 |
4.5 |
| Vin(Max)(V) |
18 |
18 |
18 |
| Vout(Min)(V) |
0.8 |
0.8 |
0.8 |
| Vout(Max)(V) |
16.2 |
15.3 |
14 |
| Iq(Typ)(mA) |
1.8 |
1.8 |
1.8 |
| Switching Frequency(Typ)(kHz) |
300 |
600 |
1200 |
| Switch Current Limit(Typ)(A) |
3.8 |
3.8 |
3.8 |
| Topology |
Buck |
Buck |
Buck |
| Operating Temperature Range(°C) |
-40 to 145 |
-40 to 145 |
-40 to 145 |
| Pin/Package |
16HTSSOP |
16HTSSOP |
16HTSSOP |
| Rating |
Catalog |
Catalog |
Catalog |
| Duty Cycle(Max)(%) |
90 |
85 |
78 |
| Vout2(Min)(V) |
0.8 |
0.8 |
0.8 |
| Vout2(Max)(V) |
16.2 |
15.2 |
14 |
| Regulated Outputs(#) |
2 |
2 |
2 |
| Thermal Shutdown |
Yes |
Yes |
Yes |
TPS54291 特性
- 4.5 V to 18 V Input Range
- Output Voltage Range 0.8 V to DMAX × VIN
- Fully Integrated Dual Buck, 1.5 A/2.5 A
- Three Fixed Switching Frequency Versions:
- TPS54290 – 300 kHz
- TPS54291 – 600 kHz
- TPS54292 – 1.2 MHz
- Integrated UVLO
- 0.8 VREF With 1% Accuracy (0°C to 85°C)
- Internal Soft-Start
- TPS54290 – 5.2 ms
- TPS54291 – 2.6 ms
- TPS54292 – 1.3 ms
- Dual PWM Outputs 180° Out-of-Phase
- Dedicated Enable for Each Channel
- Current Mode Control for Simplified Compensation
- External Compensation
- Pulse-by-Pulse Overcurrent Protection, 2.2 A/3.8 A Overcurrent Limit
- Integrated Bootstrap Switch
- Thermal Shutdown Protection at 145°C
TPS54291 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 |
| TPS54291PWP |
ACTIVE |
-40 to 145 |
3.25 | 1ku |
HTSSOP (PWP) | 16 |
90 | TUBE |
54291 |
| TPS54291PWPR |
ACTIVE |
-40 to 145 |
2.95 | 1ku |
HTSSOP (PWP) | 16 |
2000 | LARGE T&R |
54291 |
TPS54291 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 |
| TPS54291PWP |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
TPS54291PWP |
| TPS54291PWPR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
TPS54291PWPR |
TPS54291 应用技术支持与电子电路设计开发资源下载
- TPS54291 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)
TPS54291 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| 12V 输入、3.3V 1.5A 和 1.2V 以及 2.5A 双路同步降压转换器评估模块 |
TPS54291EVM-431 |
Texas Instruments |
开发电路板/EVM |
| 用于 SWIFT DC/DC 的反向电源计算器，它具有集成 FET |
SWIFTINV-CALC |
Texas Instruments |
计算实用程序 |
| 用于 SWIFT DC/DC 转换器的正负输出电压分离轨计算器 |
SWIFTPOSNEG-CALC |
Texas Instruments |
计算实用程序 |
| SwitcherPro(TM) 开关电源设计工具 |
SWITCHERPRO |
Texas Instruments |
应用软件 |
TPS54291 参考设计
| 说明 |
型号 |
公司 |
| Synchronous Buck Controller Doubles as a 2-A Buck Boost Inverter |
PMP4856 |
Texas Instruments |
