TPS79425 超低噪声、高 PSRR、快速射频、高电平启用、250mA 低压降稳压器

TPS79425 描述

The TPS794xx family of low-dropout (LDO) linear voltage regulators features high power-supply rejection ratio (PSRR), ultralow-noise, fast start-up, and excellent line and load transient responses in small outline, MSOP-8 PowerPAD™ and SOT223-6 packages. Each device in the family is stable with a small 2.2-µF ceramic capacitor on the output. The family uses an advanced, proprietary BiCMOS fabrication process to yield extremely low dropout voltages (for example, 155 mV at 250 mA). Each device achieves fast start-up times (approximately 50 µs with a 0.001-µF bypass capacitor) while consuming low quiescent current (170 µA typical). Moreover, when the device is placed in standby mode, the supply current is reduced to less than µA.

	TPS79401	TPS79418	TPS79425	TPS79428	TPS79430	TPS79433
Iout(Max)(A)	0.25	0.25	0.25	0.25	0.25	0.25
Vdo(Typ)(mV)	145	145	145	155	155	145
Iq(Typ)(mA)	0.172	0.172	0.172	0.172	0.172	0.172
Vin(Min)(V)	2.7	2.7	2.7	2.7	2.7	2.7
Vin(Max)(V)	5.5	5.5	5.5	5.5	5.5	5.5
Vout(Min)(V)		1.8	2.5	2.8	3	3.3
Vout(Max)(V)		1.8	2.5	2.8	3	3.3
Vout Adj(Min)(V)	1.22
Vout Adj(Max)(V)	5.5
Accuracy(%)	3	3	3	3	3	3
Output Capacitor(uF)	2.2	2.2	2.2	2.2	2.2	2.2
Output Capacitor Type	Ceramic	Ceramic	Ceramic	Ceramic	Ceramic	Ceramic
Fixed Output Options(V)		1.8	2.5	2.8	3	3.3
Pin/Package	6SOT-223, 8MSOP-PowerPAD	6SOT-223, 8MSOP-PowerPAD	6SOT-223, 8MSOP-PowerPAD	6SOT-223, 8MSOP-PowerPAD	6SOT-223, 8MSOP-PowerPAD	6SOT-223, 8MSOP-PowerPAD
Rating	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog
Regulated Outputs(#)	1	1	1	1	1	1

TPS79425 特性

250-mA Low-Dropout Regulator With Enable
Available in Fixed and Adjustable (1.2 V to 5.5 V) Versions
High PSRR (60 dB at 10 kHz)
Ultralow Noise (32 µVrms, TPS79425)
Fast Start-Up Time (50 µs)
Stable With a 2.2-µF Ceramic Capacitor
Excellent Load/Line Transient Response
Very Low Dropout Voltage (155 mV at Full Load)
Available in MSOP-8 and SOT223-6 Packages
APPLICATIONS
- RF: VCOs, Receivers, ADCs
- Audio
- Bluetooth™, Wireless LAN
- Cellular and Cordless Telephones
- Handheld Organizers, PDAs

TPS79425 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
TPS79425DCQ	ACTIVE	-40 to 85	0.70 \| 1ku	SOT-223 (DCQ) \| 6	78 \| TUBE	PS79425
TPS79425DCQG4	ACTIVE	-40 to 85	0.70 \| 1ku	SOT-223 (DCQ) \| 6	78 \| TUBE	PS79425
TPS79425DCQR	ACTIVE	-40 to 85	0.65 \| 1ku	SOT-223 (DCQ) \| 6	2500 \| LARGE T&R	PS79425
TPS79425DCQRG4	ACTIVE	-40 to 85	0.65 \| 1ku	SOT-223 (DCQ) \| 6	2500 \| LARGE T&R	PS79425
TPS79425DGNR	ACTIVE	-40 to 85	0.65 \| 1ku	MSOP-PowerPAD (DGN) \| 8	2500 \| LARGE T&R	AYE
TPS79425DGNRG4	ACTIVE	-40 to 85	0.65 \| 1ku	MSOP-PowerPAD (DGN) \| 8	2500 \| LARGE T&R	AYE
TPS79425DGNT	ACTIVE	-40 to 85	0.70 \| 1ku	MSOP-PowerPAD (DGN) \| 8	250 \| SMALL T&R	AYE
TPS79425DGNTG4	ACTIVE	-40 to 85	0.70 \| 1ku	MSOP-PowerPAD (DGN) \| 8	250 \| SMALL T&R	AYE

TPS79425 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
TPS79425DCQ	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS79425DCQ	TPS79425DCQ
TPS79425DCQG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS79425DCQG4	TPS79425DCQG4
TPS79425DCQR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS79425DCQR	TPS79425DCQR
TPS79425DCQRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	TPS79425DCQRG4	TPS79425DCQRG4
TPS79425DGNR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPS79425DGNR	TPS79425DGNR
TPS79425DGNRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPS79425DGNRG4	TPS79425DGNRG4
TPS79425DGNT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPS79425DGNT	TPS79425DGNT
TPS79425DGNTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPS79425DGNTG4	TPS79425DGNTG4

TPS79425 应用技术支持与电子电路设计开发资源下载

TPS79425 数据资料 dataSheet 下载.PDF
TI 德州仪器LDO低压差线性稳压器驱动器选型与价格参考 . xls
Dual MOSFET Driver (PDF 498 KB)
全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A) (PDF 2206 KB)
LDO PSRR Measurement Simplified (PDF 140 KB)
LDO Noise Demystified (PDF 782 KB)
标准线性产品交叉参考 (Rev. D) (PDF 1058 KB)
模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
所选封装材料的热学和电学性质 (PDF 645 KB)
高速数据转换 (PDF 1967 KB)

TPS79425 工具与软件

名称	型号	公司	工具/软件类型
TPS79425 评估模块	TPS79425EVM-207	Texas Instruments	开发电路板/EVM
用于 Xilinx FPGA 的 XILINXPWR-079 电源管理评估模块	XILINXPWR-079	Texas Instruments	开发电路板/EVM
采用 SOT223 (DCQ) 封装与大多数正输出 LDO 兼容的 DEM-SOT223LDO	DEM-SOT223LDO	Texas Instruments	开发电路板/EVM

TPS79425 参考设计

说明	型号	公司
Spartan™-3 电源管理解决方案（设计 1）	PR213	Texas Instruments
Spartan™-3 电源管理解决方案（设计 3）	PR215	Texas Instruments
Spartan™-II 电源管理解决方案（设计 2）	PR209	Texas Instruments
Spartan™-II 电源管理解决方案（设计 3）	PR211	Texas Instruments
Spartan™-IIE 电源管理解决方案（设计 2）	PR210	Texas Instruments
Spartan™-IIE 电源管理解决方案（设计 3）	PR212	Texas Instruments