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TPS51116 DDR1、DDR2、DDR3 转换开关和 LDO

	TPS51116
Topology	Buck,D-CAP™ Mode
Vin(Min)(V)	3
Vin(Max)(V)	28
Vout(Min)(V)	1.5
Vout(Max)(V)	3
Regulated Outputs(#)	1
Iout(Max)(A)	10
Switching Frequency(Max)(kHz)	400
Iq(Typ)(mA)	0.8
Pin/Package	20HTSSOP, 24VQFN
Thermal Shutdown	Yes
Rating	Catalog
Duty Cycle(Max)(%)	84

TPS51116 描述

The TPS51116 provides a complete power supply for DDR/SSTL-2, DDR2/SSTL-18, and DDR3 memory systems. It integrates a synchronous buck controller with a 3-A sink/source tracking linear regulator and buffered low noise reference. The TPS51116 offers the lowest total solution cost in systems where space is at a premium. The TPS51116 synchronous controller runs fixed 400kHz pseudo-constant frequency PWM with an adaptive on-time control that can be configured in D-CAP Mode for ease of use and fastest transient response or in current mode to support ceramic output capacitors. The 3-A sink/source LDO maintains fast transient response only requiring 20-µF (2 × 10 µF) of ceramic output capacitance. In addition, the LDO supply input is available externally to significantly reduce the total power losses.

TPS51116 特性

• Synchronous Buck Controller (VDDQ)
  • Wide-Input Voltage Range: 3.0-V to 28-V
  • D-CAP™ Mode with 100-ns Load Step Response
  • Current Mode Option Supports Ceramic Output Capacitors
  • Supports Soft-Off in S4/S5 States
  • Current Sensing from RDS(on) or Resistor
  • 2.5-V (DDR), 1.8-V (DDR2), Adjustable to 1.5-V (DDR3) or Output Range 0.75-V to 3.0-V
  • Equipped with Powergood, Overvoltage Protection and Undervoltage Protection
• 3-A LDO (VTT), Buffered Reference (VREF)
  • Capable to Sink and Source 3 A
  • LDO Input Available to Optimize Power Losses
  • Requires only 20-µF Ceramic Output Capacitor
  • Buffered Low Noise 10-mA VREF Output
  • Accuracy ±20 mV for both VREF and VTT
  • Supports High-Z in S3 and Soft-Off in S4/S5
  • Thermal Shutdown
• APPLICATIONS
  • DDR/DDR2/DDR3/LPDDR3 Memory Power Supplies
  • SSTL-2 SSTL-18 and HSTL Termination

TPS51116 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
TPS51116PWP	ACTIVE	-40 to 85	1.35 | 1ku	HTSSOP (PWP) | 20	70 | TUBE	TPS51116
TPS51116PWPG4	ACTIVE	-40 to 85	1.35 | 1ku	HTSSOP (PWP) | 20	70 | TUBE	TPS51116
TPS51116PWPR	ACTIVE	-40 to 85	1.20 | 1ku	HTSSOP (PWP) | 20	2000 | LARGE T&R	TPS51116
TPS51116PWPRG4	ACTIVE	-40 to 85	1.20 | 1ku	HTSSOP (PWP) | 20	2000 | LARGE T&R	TPS51116
TPS51116RGER	ACTIVE	-40 to 85	1.20 | 1ku	VQFN (RGE) | 24	3000 | LARGE T&R	TPS 51116
TPS51116RGERG4	ACTIVE	-40 to 85	1.20 | 1ku	VQFN (RGE) | 24	3000 | LARGE T&R	TPS 51116
TPS51116RGET	ACTIVE	-40 to 85	1.35 | 1ku	VQFN (RGE) | 24	250 | SMALL T&R	TPS 51116
TPS51116RGETG4	ACTIVE	-40 to 85	1.35 | 1ku	VQFN (RGE) | 24	250 | SMALL T&R	TPS 51116

TPS51116 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
TPS51116PWP	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		TPS51116PWP
TPS51116PWPG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS51116PWPG4	TPS51116PWPG4
TPS51116PWPR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		TPS51116PWPR
TPS51116PWPRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS51116PWPRG4	TPS51116PWPRG4
TPS51116RGER	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		TPS51116RGER
TPS51116RGERG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS51116RGERG4	TPS51116RGERG4
TPS51116RGET	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		TPS51116RGET
TPS51116RGETG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS51116RGETG4	TPS51116RGETG4

TPS51116 应用技术支持与电子电路设计开发资源下载

1. TPS51116 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)

TPS51116 相关工具

名称	型号	公司	工具/软件类型
TPS51100EVM-001 评估模块	TPS51100EVM-001	Texas Instruments	开发电路板/EVM
TPS51116EVM-001 评估模块	TPS51116EVM-001	Texas Instruments	开发电路板/EVM

TPS51116 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