TPS7A4701RGWR - 1A, 36V Ultra-Low Noise LDO | Texas Instruments
MPN: TPS7A4701RGWR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
Drop-in alternatives for TPS7A4701RGWR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS7A4700RGWR
β Drop-Inβ In Stock
$2.78 / Unit
View Datasheet βTPS7A4701RGWR-Q1
β Drop-Inπ Reference alternative (not in catalog)
TPS7A4701RGWT
β Drop-Inπ Reference alternative (not in catalog)
TPS7A4701-EP
β Drop-Inπ Reference alternative (not in catalog)
LT3045EDC
β Drop-Inπ Reference alternative (not in catalog)
ADM7150ARDZ
β Drop-Inπ Reference alternative (not in catalog)
TPS7A4701RGWR Maximum Ratings & Electrical Characteristics
| Output Type | Adjustable |
| Output Voltage Range | 1.4 V to 34 V |
| Maximum Output Current | 1 A |
| Input Voltage Range | 3 V to 36 V |
| Dropout Voltage | 307 mV at 1 A |
| Output Noise | 4.17 uVrms (20 Hz to 100 kHz) |
| PSRR | 72 dB at 1 kHz |
| Quiescent Current | 6.4 mA |
| Thermal Resistance | 31.4 C/W |
| Operating Temperature | -40C to +125C |
| Package | VQFN-20 (RGW) 5x5 mm |
| Mounting Type | Surface Mount |
| MSL Level | 2 (1 year) |
| RoHS Status | Compliant |
| Enable Pin | Yes (active-high) |
TPS7A4701RGWR Pin Configuration
| Pin 1 | OUT β Regulated output voltage |
| Pin 5 | GND β Ground |
| Pin 6 | EN β Enable (active high) |
| Pin 7 | IN β Input supply |
| Pin 8 | NR/SS β Noise reduction/soft-start capacitor |
| Pin 9 | FB β Feedback for output voltage setting |
| Pin 10 | OUT β Regulated output voltage |
| Pin 11 | OUT β Regulated output voltage |
| Pin 12 | OUT β Regulated output voltage |
| Pin 13 | OUT β Regulated output voltage |
| Pin 14 | GND β Ground |
| Pin 15 | IN β Input supply |
| Pin 16 | IN β Input supply |
| Pin 17 | IN β Input supply |
| Pin 18 | IN β Input supply |
| Pin 19 | GND β Ground |
| Pin 20 | GND β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS7A4701RGWR is suitable for 6 applications: High-End Audio DAC Power Supply, RF Transceiver Power Rail, Precision ADC/DAC Reference Buffering, Test and Measurement Instrumentation, Industrial 24V Bus Systems, Portable Medical Devices.
High-End Audio DAC Power Supply
The TPS7A4701RGWR provides a clean 5V rail for audio DACs with 4.17 uVrms noise and 72 dB PSRR at 1 kHz. This ensures that the power supply does not introduce audible noise into the audio signal path, preserving dynamic range and signal integrity. Placed between the 5V rail and the DAC AVDD pin with 10uF ceramic capacitors, it outperforms switching regulators by eliminating switching noise, though it dissipates more power at large VIN-VOUT deltas.
Recommended
RF Transceiver Power Rail
The TPS7A4701RGWR is ideal for powering PLL/VCO circuits in RF transceivers due to its ultra-low noise and high PSRR. The 4.17 uVrms noise and 72 dB PSRR at 1 kHz minimize phase noise and spurious signals, critical for maintaining signal purity. It can be used to supply clean power to the VCO and PLL from a noisy switching regulator output, ensuring stable frequency synthesis.
Recommended
Precision ADC/DAC Reference Buffering
The TPS7A4701RGWR provides a low-noise, high-PSRR supply for precision ADC and DAC reference circuits. Its 4.17 uVrms noise and 72 dB PSRR ensure that reference voltage fluctuations do not degrade conversion accuracy. The adjustable output allows precise voltage setting, and the enable pin enables power sequencing in multi-rail systems.
Recommended
Test and Measurement Instrumentation
The TPS7A4701RGWR is designed for high-accuracy instrumentation where clean voltage rails are critical. Its ultra-low noise and high PSRR make it suitable for powering operational amplifiers, ADCs, and DACs in precision measurement equipment. The wide input range (3V to 36V) accommodates various supply rails, and the enable pin allows controlled power-up sequencing.
Recommended
Industrial 24V Bus Systems
The TPS7A4701RGWR can operate directly from a 24V industrial bus, providing a regulated low-noise output for sensitive control circuitry. Its 36V input rating provides adequate headroom for voltage transients. The low dropout voltage (307 mV) ensures efficient operation even with significant voltage drops in the bus.
Recommended
Portable Medical Devices
The TPS7A4701RGWR provides clean, low-noise power for portable medical devices such as patient monitors and diagnostic equipment. Its low quiescent current (6.4 mA) helps extend battery life, while the ultra-low noise ensures accurate sensor readings. The small VQFN-20 package is suitable for space-constrained designs.
Recommended
Recommended Products Summary
Engineering reference data for TPS7A4701RGWR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS7A4700RGWR | TPS7A4701RGWR-Q1 | TPS7A4701RGWT | TPS7A4701-EP | LT3045EDC | ADM7150ARDZ |
|---|---|---|---|---|---|---|---|
| Package | VQFN-20 (RGW) | VQFN-20 (RGW) - same | VQFN-20 (RGW) - same | VQFN-20 (RGW) - same | VQFN-20 (RGW) - same | VQFN-20 (RGW) - same | VQFN-20 (RGW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices |
| Output Current | 1 A | 1 A | 1 A | 1 A | 1 A | 0.5 A | 0.6 A |
| Output Voltage Range | 1.4V to 34V | 1.4V to 34V | 1.4V to 34V | 1.4V to 34V | 1.4V to 34V | 0V to 15V | 1.2V to 5V |
| Enable Pin | Yes (active-high) | No | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) |
| Automotive Grade | No | No | Yes (AEC-Q100) | No | No | No | No |
| Output Noise | 4.17 uVrms | 4.17 uVrms | 4.17 uVrms | 4.17 uVrms | 4.17 uVrms | 0.8 uVrms | 1.6 uVrms |
| PSRR at 1 kHz | 72 dB | 72 dB | 72 dB | 72 dB | 72 dB | 79 dB | 94 dB |
Key Differentiators
- Only VQFN-20 family member with enable pin (vs TPS7A4700RGWR)
- Automotive grade option available (vs TPS7A4701RGWR-Q1)
- Higher output current than cross-brand alternatives (vs LT3045EDC)
Design Notes
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 36V. 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.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified - choose TPS7A4701RGWR-Q1 for automotive.
