TPS51220A 固定频率 99% 占空比峰值电流模式笔记本系统功率控制器

TPS51220A 描述

The TPS51220A is a dual synchronous buck regulator controller with two LDOs. It is optimized for 5-V/3.3-V system controller, enabling designers to cost effectively complete 2-cell to 4-cell notebook system power supply. The TPS51220A supports high efficiency, fast transient response, and 99% duty cycle operation. It supports supply input voltage ranging from 4.5 V to 32 V, and output voltages from 1 V to 12 V. Two types of control schemes can be chosen depending on the application. Peak current mode supports stability operation with lower ESR capacitor and output accuracy. The D-CAP mode supports fast transient response. The high duty (99%) operation and the wide input/output voltage range supports flexible design for small mobile PCs and a wide variety of other applications.

	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

TPS51220A 特性

• Input Voltage Range: 4.5 V to 32 V
• Output Voltage Range: 1 V to 12 V
• Selectable Light Load Operation (Continuous / Auto Skip / Out-Of-Audio Skip)
• Programmable Droop Compensation
• Voltage Servo Adjustable Soft Start
• 200-kHz to 1-MHz Fixed-Frequency PWM
• Selectable Current/D-CAP Mode Architecture
• 180° Phase Shift Between Channels
• Resistor or Inductor DCR Current Sensing
• Adaptive Zero Crossing Circuit
• Powergood Output for Each Channel
• OCL/OVP/UVP/UVLO Protections (OVP Disable Option)
• Thermal Shutdown (Non-Latch)
• Output Discharge Function (Disable Option)
• Integrated Boot Strap MOSFET Switch
• QFN-32 (RTV/RSN) Package
• APPLICATIONS
  • Notebook Computer System and I/O Bus
  • Point of Load in LCD TV, MFP

TPS51220A 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
TPS51220ARSNR	ACTIVE	-40 to 85	2.25 | 1ku	QFN (RHB) | 32	3000 | LARGE T&R	TPS 51220A
TPS51220ARSNT	ACTIVE	-40 to 85	2.50 | 1ku	QFN (RHB) | 32	250 | SMALL T&R	TPS 51220A
TPS51220ARTVR	ACTIVE	-40 to 85	2.25 | 1ku	QFN (RHB) | 32	3000 | LARGE T&R	TPS 51220A
TPS51220ARTVT	ACTIVE	-40 to 85	2.50 | 1ku	QFN (RHB) | 32	250 | SMALL T&R	TPS 51220A

TPS51220A 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
TPS51220ARSNR	Green (RoHS & no Sb/Br)	Call TI	Level-2-260C-1 YEAR		TPS51220ARSNR
TPS51220ARSNT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		TPS51220ARSNT
TPS51220ARTVR	Green (RoHS & no Sb/Br)	Call TI	Level-2-260C-1 YEAR		TPS51220ARTVR
TPS51220ARTVT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		TPS51220ARTVT

TPS51220A 应用技术支持与电子电路设计开发资源下载

1. TPS51220A 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)

TPS51220A 相关工具

名称	型号	公司	工具/软件类型
使用 TPS51220A 的高性能双路输出同步降压评估模块	TPS51220AEVM-476	Texas Instruments	开发电路板/EVM

TPS51220A 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