首页 > TI 德州仪器 > 电源管理 > 非隔离式开关 DC/DC 调节器

TPS51427 用于笔记本电脑电源轨的 D-CAP+™ 模式双路同步降压控制器

	TPS51427	TPS51427A
Topology	Buck,D-CAP™ Mode	Buck,D-CAP™ Mode
Vin(Min)(V)	5.5	5.5
Vin(Max)(V)	28	28
Vout(Min)(V)	0.7	0.7
Vout(Max)(V)	5.9	5.9
Regulated Outputs(#)	2	2
Iout(Max)(A)	20	20
Switching Frequency(Max)(kHz)	500	500
Pin/Package	32QFN	32QFN
Thermal Shutdown	Yes	Yes
Vout2(Min)(V)	0.5	0.5
Vout2(Max)(V)	2.5	2.5
Iout2(A)	20	20
Rating	Catalog	Catalog
Duty Cycle(Max)(%)	90	90

TPS51427 描述

The TPS51427 is a dual synchronous step-down controller designed for notebook and mobile communications applications. This device is part of a low-cost suite of notebook power bus regulators that enables system designs with low external component counts. The TPS51427 includes two pulse-width-modulation (PWM) controllers, SMPS1 and SMPS2. The output of SMPS1 can be adjusted from 0.7 V to 5.9 V, while the output of SMPS2 can be adjusted from 0.5 V to 2.5 V. This device also features a low-dropout (LDO) regulator that provides a 5-V/3.3-V output, or adjustable from 0.7-V to 4.5-V output via LDOREFIN. The fixed-frequency emulated adaptive on-time control supports seamless operation between PWM mode under heavy load conditions and reduced frequency operation at light loads for high-efficiency down to the milliampere range.

TPS51427 特性

• Fixed-Frequency Emulated On-Time Control; Frequency Selectable from Three Options
• D-CAP™ Mode Enables Fast Transient Response Less than 100 ns
• Advanced Ramp Compensation Allows Low Output Ripple with Minimal Jitter
• Selectable PWM-Only/OOA/Auto-Skip Modes
• Wide Input Voltage Range: 5.5 V to 28 V
• Dual Fixed or Adjustable SMPS:
  • 0.7 V to 5.9 V (Channel1)
  • 0.5 V to 2.5 V (Channel2)
• Fixed 3.3-V/5-V, or Adjustable Output 0.7-V to 4.5-V LDO; Capable of Sourcing 100 mA
• Fixed 3.3-VREF Output Capable of Sourcing 10 mA
• Temperature Compensated Low-Side RDS(on) Current Sensing
• Adaptive Gate Drivers with Integrated Boost Switch
• Bootstrap Charge Auto Refresh
• Integrated Soft Start, Tracking Soft Stop
• Independent PGOOD and EN for Each Channel
• APPLICATIONS
  • Notebook I/O and System Bus Rails
  • Graphics Application
  • PDAs and Mobile Communication Devices

TPS51427 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
TPS51427RHBR	ACTIVE	-40 to 85	2.50 | 1ku	QFN (RHB) | 32	3000 | LARGE T&R	TPS 51427
TPS51427RHBRG4	ACTIVE	-40 to 85	2.50 | 1ku	QFN (RHB) | 32	3000 | LARGE T&R	TPS 51427
TPS51427RHBT	ACTIVE	-40 to 85	2.75 | 1ku	QFN (RHB) | 32	250 | SMALL T&R	TPS 51427
TPS51427RHBTG4	ACTIVE	-40 to 85	2.75 | 1ku	QFN (RHB) | 32	250 | SMALL T&R	TPS 51427

TPS51427 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
TPS51427RHBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		TPS51427RHBR
TPS51427RHBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS51427RHBRG4	TPS51427RHBRG4
TPS51427RHBT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		TPS51427RHBT
TPS51427RHBTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS51427RHBTG4	TPS51427RHBTG4

TPS51427 应用技术支持与电子电路设计开发资源下载

1. TPS51427 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)

TPS51427 相关工具

名称	型号	公司	工具/软件类型
使用 TPS51427 的高性能双路输出同步降压评估模块	TPS51427EVM-476	Texas Instruments	开发电路板/EVM

TPS51427 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