TPS51124 用于低压系统电源的双路同步步降控制器

TPS51124 描述

The TPS51124 is a dual, adaptive on-time D-CAPTM mode synchronous buck controller. The part enables system designers to cost effectively complete the suite of notebook power bus regulators with the absolute lowest external component count and lowest standby consumption. The fixed frequency emulated adaptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency operation at light load for high efficiency down to milliampere range. The main control loop for the TPS51124 uses the D-CAP mode that optimized for low ESR output capacitors such as POSCAP or SP-CAP promises fast transient response with no external compensation. Simple and separate power good signals for each channel allow flexibility of power sequencing.

	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

TPS51124 特性

• High Efficiency, Low-Power Consumption, Shutdowns to <1 uA
• Fixed Frequency Emulated On-Time Control, Frequency Selectable From Three Options
• D-CAPTM Mode Enables Fast Transient Response
• Auto-Skip Mode
• Less Than 1% Initial Reference Accuracy
• Low Output Ripple
• Wide Input Voltage Range: 3 V to 28 V
• Output Voltage Range: 0.76 V to 5.5 V
• Low-Side RDS(ON) Loss-less Current Sensing
• Adaptive Gate Drivers With Integrated Boost Diode
• Internal 1.2-ms Voltage-Servo Soft Start
• Power-Good Signals for Each Channel With Delay Timer
• Output Discharge During Disable, Fault
• APPLICATIONS
  • Notebook I/O and Low Voltage System Bus

TPS51124 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
TPS51124RGER	ACTIVE	-40 to 85	2.10 | 1ku	VQFN (RGE) | 24	3000 | LARGE T&R	TPS 51124
TPS51124RGERG4	ACTIVE	-40 to 85	2.10 | 1ku	VQFN (RGE) | 24	3000 | LARGE T&R	TPS 51124
TPS51124RGET	ACTIVE	-40 to 85	2.35 | 1ku	VQFN (RGE) | 24	250 | SMALL T&R	TPS 51124
TPS51124RGETG4	ACTIVE	-40 to 85	2.35 | 1ku	VQFN (RGE) | 24	250 | SMALL T&R	TPS 51124

TPS51124 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
TPS51124RGER	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		TPS51124RGER
TPS51124RGERG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS51124RGERG4	TPS51124RGERG4
TPS51124RGET	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		TPS51124RGET
TPS51124RGETG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS51124RGETG4	TPS51124RGETG4

TPS51124 应用技术支持与电子电路设计开发资源下载

1. TPS51124 数据资料 dataSheet 下载.PDF
2. TI 德州仪器非隔离式开关 DC/DC 调节器选型与价格参考 . xls
3. Dual MOSFET Driver (PDF 498 KB)
4. 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A) (PDF 2206 KB)
5. Understanding Boost Power Stages In Switchmode Power Supplies (PDF 149 KB)
6. Understanding Buck Power Stages In Switchmode Power Supplies (PDF 173 KB)
7. 标准线性产品交叉参考 (Rev. D) (PDF 1058 KB)
8. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
9. 所选封装材料的热学和电学性质 (PDF 645 KB)
10. 高速数据转换 (PDF 1967 KB)

TPS51124 相关工具

名称	型号	公司	工具/软件类型
Highly Efficient, Dual Synchronous Buck Converter Evaluation Module	TPS51124EVM-001	Texas Instruments	开发电路板/EVM

TPS51124 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