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TPS51120 用于笔记本电源的具有 100mA 待机寄存器的双电流模式同步步降控制器

TPS51120 描述

The TPS51120 is a highly sophisticated dual current mode synchronous step-down controller. It is a full featured controller designed to run directly off a three- or four-cell Li-ion battery and provide high-power and 5-V and/or 3.3-V standby regulation for all the downstream circuitry in a notebook computer system. High current, 100-mA, 5-V or 3.3-V on-board linear regulators have glitch-free switch over function to SMPS and can be kept alive independently during standby state. The pseudo-constant frequency adaptive on-time control scheme supports full range of current mode operation including simplified loop compensation, ceramic output capacitors as well as seamless transition to reduced frequency operation at light-load condition.

	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

TPS51120 特性

• 3.3-V and 5-V 100-mA Bootstrapped Standby Regulators with Independent Enables
• Selectable D-CAP® Mode Enables Fast Transient Response Less than 100 ns
• Selectable Low Ripple Current Mode
• Less than 1% Internal Reference Accuracy
• Selectable PWM-only/Auto-skip Modes
• Low-side RDS(on) Loss-less Current Sensing
• RSENSE Accurate Current Sense Option
• Internal Soft-start and Integrated VOUT Discharge Transistors
• Integrated 2-V Reference
• Adaptive Gate Drivers with Integrated Boost Diode
• Power Good for Each Channel with Delay Timer
• Fault Disable Mode
• Supply Input Voltage Range: 4.5 V to 28 V
• APPLICATIONS
  • Notebook Computers System Bus and I/O

TPS51120 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
TPS51120RHBR	ACTIVE	-40 to 85	2.20 | 1ku	QFN (RHB) | 32	3000 | LARGE T&R	TPS 51120
TPS51120RHBRG4	ACTIVE	-40 to 85	2.20 | 1ku	QFN (RHB) | 32	3000 | LARGE T&R	TPS 51120
TPS51120RHBT	ACTIVE	-40 to 85	2.45 | 1ku	QFN (RHB) | 32	250 | SMALL T&R	TPS 51120
TPS51120RHBTG4	ACTIVE	-40 to 85	2.45 | 1ku	QFN (RHB) | 32	250 | SMALL T&R	TPS 51120

TPS51120 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
TPS51120RHBR	Green (RoHS & no Sb/Br)	Call TI	Level-2-260C-1 YEAR		TPS51120RHBR
TPS51120RHBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS51120RHBRG4	TPS51120RHBRG4
TPS51120RHBT	Green (RoHS & no Sb/Br)	Call TI	Level-2-260C-1 YEAR		TPS51120RHBT
TPS51120RHBTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS51120RHBTG4	TPS51120RHBTG4

TPS51120 应用技术支持与电子电路设计开发资源下载

1. TPS51120 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)

TPS51120 相关工具

名称	型号	公司	工具/软件类型
TPS51120 评估模块	TPS51120EVM-001	Texas Instruments	开发电路板/EVM

TPS51120 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