Texas Instruments
TPS7A4701RGWR - 1A, 35V Ultra-Low Noise LDO | Texas Instruments
料号： TPS7A4701RGWR ✓ 量产中
有现货
1-3 个工作日内发货
1.4 V to 34 V Vdss
1 A Id
31.4 C/W Rds(on)
VQFN-20 (RGW) 5x5 mm Package
低至 $3.2467
USD / 件
最小起订量： 1 |
价格更新于： 2026-09-02
批量定价
| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.2467 | $3.25 |
ℹ️ 所有价格均以 USD 计价
TPS7A4701RGWR 概述
The Texas Instruments TPS7A4701RGWR is an ultra-low-noise, high-PSRR LDO linear regulator delivering up to 1A output current in a 20-pin VQFN (RGW) package with exposed thermal pad. It features an adjustable output voltage range of 1.4V to 34V and supports input voltages from 3V to 35V.
Key features include 4.17 uVrms output noise (20 Hz to 100 kHz), 72 dB PSRR at 1 kHz, and a low dropout voltage of 200 mV at full 1A load. The device also offers 6.4 mA quiescent current, an active-high enable pin for power sequencing, and thermal shutdown protection. The VQFN-20 package provides a thermal resistance of 31.4 C/W, enabling compact designs without external heatsinking at moderate power levels.
The TPS7A4701 utilizes a bipolar architecture with a precision bandgap reference, achieving noise performance comparable to discrete reference designs while maintaining regulator simplicity. The high PSRR minimizes ripple from upstream switching converters, making it suitable for noise-sensitive analog and RF signal chains where clean power rails are critical.
Typical applications include high-end audio DAC power supplies, PLL/VCO power rails in RF transceivers, precision ADC/DAC reference buffering, and test and measurement instrumentation. The wide input range also supports industrial 24V bus systems with adequate headroom.
When designing with this device, ensure adequate input-to-output voltage headroom to maintain regulation under all load conditions. The enable pin allows sequential power-up in multi-rail systems, which is essential for processors requiring specific rail sequencing.
Key features include 4.17 uVrms output noise (20 Hz to 100 kHz), 72 dB PSRR at 1 kHz, and a low dropout voltage of 200 mV at full 1A load. The device also offers 6.4 mA quiescent current, an active-high enable pin for power sequencing, and thermal shutdown protection. The VQFN-20 package provides a thermal resistance of 31.4 C/W, enabling compact designs without external heatsinking at moderate power levels.
The TPS7A4701 utilizes a bipolar architecture with a precision bandgap reference, achieving noise performance comparable to discrete reference designs while maintaining regulator simplicity. The high PSRR minimizes ripple from upstream switching converters, making it suitable for noise-sensitive analog and RF signal chains where clean power rails are critical.
Typical applications include high-end audio DAC power supplies, PLL/VCO power rails in RF transceivers, precision ADC/DAC reference buffering, and test and measurement instrumentation. The wide input range also supports industrial 24V bus systems with adequate headroom.
When designing with this device, ensure adequate input-to-output voltage headroom to maintain regulation under all load conditions. The enable pin allows sequential power-up in multi-rail systems, which is essential for processors requiring specific rail sequencing.
直接替换替代料： TPS7A4701RGWR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TPS7A4701RGWR （相同外形与封装尺寸） ——差异在于 Input Voltage Range, Output Voltage Range, Package, RoHS Status.
Intel
Input Voltage Range: 2.2 V to 6 V
Output Voltage Range: 0.8 V to 5 V (adjustable)
Package: 10-DFN (3x3 mm), Pb-Free
对比 TPS7A4701RGWR →
快速对比工具——选择替代料号进行并排对比：
TPS7A4700RGWR
Texas Instruments
Positive, adjustable (ANY-OUT programmable) · 1.4 V to 20.5 V (ANY-OUT via PCB layout) · 1 A · 3 V to 36 V · 4.17 uVRMS (20 Hz to 100 kHz)
✓ 有现货
$3.6591 / 个
查看数据手册 →TPS7A4701RGWR-Q1
same die/package, AEC-Q100 automotive grade
📋 参考替代料（不在目录中）
TPS7A4701RGWT
same die, tape and reel packaging variant
📋 参考替代料（不在目录中）
TPS7A4701RGWR 最大额定值与电气特性
| 输出类型 | Adjustable |
| 输出电压范围 | 1.4 V to 34 V |
| 最大输出电流 | 1 A |
| 输入电压范围 | 3 V to 35 V |
| 压差电压 | 200 mV at 1 A |
| 输出噪声 | 4.17 uVrms (20 Hz to 100 kHz) |
| PSRR | 72 dB at 1 kHz |
| 静态电流 | 6.4 mA |
| 热阻 | 31.4 C/W |
| 工作温度 | -40C to +125C |
| 封装 | VQFN-20 (RGW) 5x5 mm |
| 安装类型 | Surface Mount |
| MSL 等级 | 2 (1 year) |
| RoHS 状态 | Compliant |
| 使能引脚 | Yes (active-high) |
TPS7A4701RGWR 引脚配置
| 引脚 1 | OUT — Regulated output voltage |
| 引脚 2 | OUT — Regulated output voltage |
| 引脚 3 | OUT — Regulated output voltage |
| 引脚 4 | OUT — Regulated output voltage |
| 引脚 5 | GND — Ground |
| 引脚 6 | EN — Enable (active high) |
| 引脚 7 | IN — Input supply |
| 引脚 8 | IN — Input supply |
| 引脚 9 | IN — Input supply |
| 引脚 10 | IN — Input supply |
| 引脚 11 | NR/SS — Noise reduction/soft-start |
| 引脚 12 | FB — Feedback |
| 引脚 13 | GND — Ground |
| 引脚 14 | GND — Ground |
| 引脚 15 | GND — Ground |
| 引脚 16 | GND — Ground |
| 引脚 17 | GND — Ground |
| 引脚 18 | GND — Ground |
| 引脚 19 | GND — Ground |
| 引脚 20 | GND — Ground |
典型应用
TPS7A4701RGWR 适用于 6 应用s: High-End Audio DAC Power Supply, RF Transceiver Power Supply, Precision ADC Reference Buffer, Test and Measurement Instrumentation, Industrial 24V Bus Systems, Portable Medical Devices.
High-End Audio DAC Power Supply
Provides clean 5V rail for audio DACs with 4.17uVrms noise.
推荐
RF Transceiver Power Supply
Supplies low-noise power to PLL/VCO circuits in RF transceivers.
推荐
Precision ADC Reference Buffer
Buffers reference voltage for precision ADCs with low noise.
推荐
Test and Measurement Instrumentation
Provides clean power rails for sensitive measurement circuits.
推荐
Industrial 24V Bus Systems
Regulates 24V industrial bus down to low-noise rails for sensors and controllers.
推荐
Portable Medical Devices
Provides low-noise power for battery-operated medical monitoring equipment.
推荐
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What is the output voltage range of TPS7A4701?
The TPS7A4701 adjustable version outputs from 1.4V to 34V using external resistor dividers. According to TI datasheet SBOS708B, the output is set by two external resistors with the formula VOUT = 1.4V * (1 + R1/R2).
Does TPS7A4701 require a heatsink at 1A output?
At VIN=12V, VOUT=5V, and 1A load, the TPS7A4701 dissipates approximately 7W of power. With a thermal resistance of 31.4 C/W (theta_JA), the junction temperature would rise 220C above ambient. A heatsink or substantial copper pour (at least 1 square inch) is required for reliable operation above 2-3W dissipation.
What is the difference between TPS7A4701 and TPS7A4700?
The TPS7A4701 includes an active-high enable pin for power sequencing, while the TPS7A4700 does not have an enable pin. Both share identical noise (4.17 uVrms) and PSRR (72 dB at 1 kHz) specifications and the same VQFN-20 (RGW) package, making them drop-in replacements.
What is the output noise of TPS7A4701?
The TPS7A4701 has an output noise of 4.17 uVrms over the 20 Hz to 100 kHz bandwidth. This makes it suitable for noise-sensitive applications such as audio DACs, RF synthesizers, and precision ADC references.
Can TPS7A4701 be used for audio applications?
Yes, the TPS7A4701 is ideal for audio DAC power supplies due to its 4.17 uVrms ultra-low noise and 72 dB PSRR at 1 kHz. These specifications ensure clean power rails that do not introduce audible noise or interference into the audio signal path.
What is the input voltage range of TPS7A4701?
The TPS7A4701 operates with an input voltage range from 3V to 35V. This wide range allows it to be used in various applications, including industrial 24V bus systems and battery-powered devices.
What is the dropout voltage of TPS7A4701?
The TPS7A4701 has a low dropout voltage of 200 mV at full 1A load. This low dropout allows efficient regulation even when the input voltage is close to the output voltage, reducing power dissipation.
Is TPS7A4701 available in automotive grade?
The standard TPS7A4701RGWR is not AEC-Q100 qualified. However, the TPS7A4701RGWR-Q1 variant is AEC-Q100 qualified for automotive applications, sharing the same VQFN-20 (RGW) package and pinout.
What is the quiescent current of TPS7A4701?
The TPS7A4701 has a quiescent current of 6.4 mA. This relatively low quiescent current helps maintain efficiency in battery-powered applications while providing high performance.
What is the PSRR of TPS7A4701?
The TPS7A4701 achieves a PSRR of 72 dB at 1 kHz. This high power supply rejection ratio minimizes ripple from upstream switching converters, making it ideal for noise-sensitive analog and RF circuits.
What is the package of TPS7A4701?
The TPS7A4701 is available in a 20-pin VQFN (RGW) package measuring 5x5 mm with an exposed thermal pad. This compact package is suitable for space-constrained designs and provides good thermal performance.
What is the operating temperature range of TPS7A4701?
The TPS7A4701 operates over a temperature range of -40C to +125C. This wide range makes it suitable for industrial and automotive environments where extreme temperatures are common.
Does TPS7A4701 have thermal shutdown protection?
Yes, the TPS7A4701 includes thermal shutdown protection. This feature prevents damage from overheating by shutting down the regulator when the junction temperature exceeds safe limits.
What is the MSL level of TPS7A4701?
The TPS7A4701 has an MSL (Moisture Sensitivity Level) of 2, with a floor life of 1 year. This indicates the component can be stored for up to one year before soldering, provided it is kept in a dry environment.
Is TPS7A4701 RoHS compliant?
Yes, the TPS7A4701 is RoHS compliant. This ensures it meets the European Union's restrictions on hazardous substances, making it suitable for use in consumer and industrial products.
工程参考数据： TPS7A4701RGWR ——对比、设计指导和合规信息。
选型指南
Choose TPS7A4701RGWR when you need a positive-output ultra-low-noise LDO with enable pin for power sequencing in industrial or consumer applications. Choose TPS7A4700RGWR if you do not need the enable pin (slight cost savings, same package). Choose TPS7A4701RGWR-Q1 for automotive applications requiring AEC-Q100 qualification. Choose TPS7A4701RGWT if you prefer a different tape and reel ordering option, but note it is electrically identical. All parts share the same VQFN-20 (RGW) package footprint, enabling PCB layout reuse across variants.
与替代料对比
| 参数 | 本产品 | TPS7A4700RGWR | TPS7A4701RGWR-Q1 | TPS7A4701RGWT |
|---|---|---|---|---|
| Package | VQFN-20 (RGW) | VQFN-20 (RGW) - same | VQFN-20 (RGW) - same | VQFN-20 (RGW) - same |
| Output Current | 1 A | 1 A | 1 A | 1 A |
| Output Voltage Range | 1.4V to 34V | 1.4V to 34V | 1.4V to 34V | 1.4V to 34V |
| Enable Pin | Yes (active-high) | No | Yes (active-high) | Yes (active-high) |
| Automotive Grade | No | No | Yes (AEC-Q100) | No |
| Output Noise | 4.17 uVrms | 4.17 uVrms | 4.17 uVrms | 4.17 uVrms |
| PSRR at 1 kHz | 72 dB | 72 dB | 72 dB | 72 dB |
| Quiescent Current | 6.4 mA | 6.4 mA | 6.4 mA | 6.4 mA |
关键差异点
- Only VQFN-20 family member with enable pin （对比 TPS7A4700RGWR)
- Automotive grade option available （对比 TPS7A4701RGWR-Q1)
- Tape and reel packaging variant （对比 TPS7A4701RGWT)
设计说明
At VIN=12V, VOUT=5V, and 1A load, power dissipation is 7W. The VQFN-20 package has theta_JA of 31.4 C/W, resulting in a 220C junction temperature rise. A heatsink or at least 1 square inch of copper pour is required for reliable operation above 2W dissipation.
Place input and output capacitors as close to the IC pins as possible. Use a 10uF ceramic capacitor on the input and a 10uF ceramic capacitor on the output. Add a 0.1uF ceramic capacitor in parallel for high-frequency noise bypass.
Do not exceed the maximum input voltage of 35V. Ensure the external resistor divider uses 1% or better tolerance resistors to maintain output voltage accuracy. The NR/SS capacitor controls startup time and noise bandwidth - do not omit it.
合规信息
RoHS
Compliant
REACH
Compliant
AEC-Q100
无铅
无卤
冲突矿物
Compliant
RoHS compliant per TI product page. Not AEC-Q100 qualified - choose TPS7A4701RGWR-Q1 for automotive.
数据核验日期： 2026-08-17
——数据由 XAIPART 元器件工程团队核验和整理
相关搜索
TPS7A4701RGWR
TPS7A4701 datasheet
Texas Instruments TPS7A4701
ultra low noise LDO 1A 35V
VQFN-20 LDO regulator
TPS7A4701 audio DAC power supply
TPS7A4701 vs TPS7A4700
TPS7A4701 drop-in replacement
TPS7A4701RGWR buy price
what is the output noise of TPS7A4701
TPS7A4701 pinout VQFN-20
low noise voltage regulator RF application
相关元器件 & 术语
Texas Instruments
TPS7A4701
TPS7A4701RGWR
TPS7A4700RGWR
TPS7A4701RGWR-Q1
TPS7A4701RGWT
LDO
linear regulator
PSRR
VQFN-20
RoHS
AEC-Q100
audio DAC
RF power supply
bandgap reference
thermal shutdown
enable pin
相关技术指南
TPS7A4701RGWR：TI 1A、35V 超低噪声 LDO 稳压器完整指南
TPS7A4701RGWR：TI 1A 超低噪声 LDO，噪声 4.17 uVrms，PSRR 72 dB，3-35V 输入，VQFN-20。截至 2026-09-02 现货价 $3.2467。
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TPS7A4700RGWR：36V 1A 超低噪声 LDO — 完整工程师指南、规格与替代方案
TPS7A4700RGWR：TI 36V 输入、1A LDO，噪声 4.17 µVRMS，ANY-OUT 编程 1.4–20.5V，VQFN-20。XAIPART 现货供应。
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