Texas Instruments
TPS7A4701RGWR - 1A, 35V Ultra-Low Noise LDO | Texas Instruments
N.º da peça: TPS7A4701RGWR ✓ Ativo
Em estoque
Enviado em 1 a 3 dias úteis
1.4 V to 34 V Vdss
1 A Id
31.4 C/W Rds(on)
VQFN-20 (RGW) 5x5 mm Package
A partir de $3.2467
USD / unidade
MOQ: 1 |
Preço atualizado: 2026-09-02
Preços por volume
| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.2467 | $3,25 |
ℹ️ Todos os preços estão em USD
TPS7A4701RGWR Visão geral
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.
Alternativas drop-in para TPS7A4701RGWR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com TPS7A4701RGWR (mesmo formato e footprint) — diferindo em 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
Comparar com TPS7A4701RGWR →
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
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)
✓ Em estoque
$3.6591 / unidade
Ver ficha técnica →TPS7A4701RGWR-Q1
same die/package, AEC-Q100 automotive grade
📋 Alternativa de referência (fora do catálogo)
TPS7A4701RGWT
same die, tape and reel packaging variant
📋 Alternativa de referência (fora do catálogo)
TPS7A4701RGWR Classificações máximas e características elétricas
| Tipo de saída | Adjustable |
| Faixa de tensão de saída | 1.4 V to 34 V |
| Corrente máxima de saída | 1 A |
| Faixa de tensão de entrada | 3 V to 35 V |
| Tensão de dropout | 200 mV at 1 A |
| Ruído de saída | 4.17 uVrms (20 Hz to 100 kHz) |
| PSRR | 72 dB at 1 kHz |
| Corrente de repouso | 6.4 mA |
| Resistência térmica | 31.4 C/W |
| Temperatura de operação | -40C to +125C |
| Encapsulamento | VQFN-20 (RGW) 5x5 mm |
| Tipo de montagem | Surface Mount |
| Nível MSL | 2 (1 year) |
| Status RoHS | Compliant |
| Pino de habilitação | Yes (active-high) |
Configuração de pinos do TPS7A4701RGWR
| Pino 1 | OUT — Regulated output voltage |
| Pino 2 | OUT — Regulated output voltage |
| Pino 3 | OUT — Regulated output voltage |
| Pino 4 | OUT — Regulated output voltage |
| Pino 5 | GND — Ground |
| Pino 6 | EN — Enable (active high) |
| Pino 7 | IN — Input supply |
| Pino 8 | IN — Input supply |
| Pino 9 | IN — Input supply |
| Pino 10 | IN — Input supply |
| Pino 11 | NR/SS — Noise reduction/soft-start |
| Pino 12 | FB — Feedback |
| Pino 13 | GND — Ground |
| Pino 14 | GND — Ground |
| Pino 15 | GND — Ground |
| Pino 16 | GND — Ground |
| Pino 17 | GND — Ground |
| Pino 18 | GND — Ground |
| Pino 19 | GND — Ground |
| Pino 20 | GND — Ground |
Aplicações típicas
TPS7A4701RGWR é adequado para 6 aplicaçãos: 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.
Recomendado
RF Transceiver Power Supply
Supplies low-noise power to PLL/VCO circuits in RF transceivers.
Recomendado
Precision ADC Reference Buffer
Buffers reference voltage for precision ADCs with low noise.
Recomendado
Test and Measurement Instrumentation
Provides clean power rails for sensitive measurement circuits.
Recomendado
Industrial 24V Bus Systems
Regulates 24V industrial bus down to low-noise rails for sensors and controllers.
Recomendado
Portable Medical Devices
Provides low-noise power for battery-operated medical monitoring equipment.
Recomendado
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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.
Dados de referência de engenharia para TPS7A4701RGWR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
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.
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Only VQFN-20 family member with enable pin (vs TPS7A4700RGWR)
- Automotive grade option available (vs TPS7A4701RGWR-Q1)
- Tape and reel packaging variant (vs TPS7A4701RGWT)
Notas de projeto
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.
Informações de conformidade
RoHS
Compliant
REACH
Compliant
AEC-Q100
Sem chumbo
Sem halogênios
Minerais de conflito
Compliant
RoHS compliant per TI product page. Not AEC-Q100 qualified - choose TPS7A4701RGWR-Q1 for automotive.
Dados verificados em: 2026-08-17
— dados verificados e curados pela equipe de engenharia de componentes da XAIPART
Buscas relacionadas
TPS7A4701RGWR
TPS7A4701 datasheet
Texas Instruments TPS7A4701
ultra low noise LDO 1A 35V
VQFN-20 LDO regulator
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TPS7A4701 vs TPS7A4700
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low noise voltage regulator RF application
Componentes & termos relacionados
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
Guias técnicos relacionados
TPS7A4701RGWR: Guia Completo do Regulador LDO de 1A e 35V de Ruído Ultrabaixo da TI
TPS7A4701RGWR: LDO de ruído ultrabaixo de 1A da TI com ruído de 4,17 uVrms, PSRR de 72 dB, entrada de 3-35V, VQFN-20. Em estoque, $3.2467 em
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