TPS7A4701QRGWRQ1 - 1A 35V Ultra-Low Noise LDO | TI Automotive
MPN: TPS7A4701QRGWRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.35 | $5.35 |
| 10 | $4.82 | $48.20 |
| 100 | $4.29 | $429.00 |
| 500 | $3.86 | $1,930.00 |
| 1,000 | $3.48 | $3,480.00 |
Drop-in alternatives for TPS7A4701QRGWRQ1 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:
TPS7A4700QRGWRQ1
β Drop-Inβ In Stock
$3.65 / Unit
View Datasheet βTPS7A4701RGWR
β Drop-Inβ In Stock
$3.1 / Unit
View Datasheet βTPS7A4701QRGWTQ1
β Drop-Inπ Reference alternative (not in catalog)
TPS7A4701-EP
β Drop-Inπ Reference alternative (not in catalog)
LT3045
β‘ Same Packageπ Reference alternative (not in catalog)
TPS7A4701QRGWRQ1 Maximum Ratings & Electrical Characteristics
| Output Type | Adjustable/Programmable |
| Output Voltage Range | 1.4 V to 34 V (adjustable), up to 20.5 V (PCB-programmable) |
| Maximum Output Current | 1 A |
| Input Voltage Range | Up to 35 V |
| Output Noise | 4.2 uVRMS (20 Hz to 100 kHz) |
| Regulator Topology | LDO (Low-Dropout Linear Regulator) |
| Number of Outputs | 1 |
| Polarity | Positive |
| Technology | Bipolar |
| Enable Pin | Yes |
| Protection Features | Thermal shutdown, current limit |
| Qualification | AEC-Q100 (Automotive) |
| Package | 20-VQFN (5x5 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | [DATA_NEEDED: operating temperature range] |
| RoHS Status | Compliant |
| Packaging | Tape & Reel (T/R) |
TPS7A4701QRGWRQ1 Pin Configuration
| Pin 1-4 | IN β Input supply voltage (up to 35V) |
| Pin 5-8 | OUT β Regulated output voltage |
| Pin 9 | EN β Enable (active high) |
| Pin 10 | NR/SS β Noise reduction / soft-start capacitor |
| Pin 11 | FB β Feedback for adjustable output |
| Pin 12-15 | GND β Ground |
| Pin 16-20 | GND/Pad β Ground and exposed thermal pad |
| Pin PAD | PowerPAD β Exposed thermal pad, must be soldered to PCB 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
TPS7A4701QRGWRQ1 is suitable for 6 applications: Automotive ADAS Sensor Power, RF PLL/VCO Power Supply, Automotive Audio Amplifier Supply, Precision ADC/DAC Reference Rails, Industrial 24V Bus Post-Regulation, Automotive Body Electronics and Lighting.
Automotive ADAS Sensor Power
The TPS7A4701QRGWRQ1 suits ADAS radar and camera sensor rails with its 35V input tolerance and AEC-Q100 qualification. Its 4.2 uVRMS noise keeps radar LO chains and image-sensor analog rails clean, while the 1A output supports sensor SoC core supplies. Post-regulating a buck converter output with this LDO removes switching ripple via high PSRR, trading efficiency for noise-critical signal integrity in safety-rated systems.
Recommended
RF PLL/VCO Power Supply
RF synthesizers demand ultra-clean supplies because VCO pushing and phase-noise degradation track supply noise directly. The 4.2 uVRMS noise and high PSRR of the TPS7A4701QRGWRQ1 minimize spurs on PLL charge-pump and VCO tuning rails. Placing it after a switching preregulator yields a quiet 5V or 3.3V rail; the bipolar process maintains low noise across the audio-to-RF noise bandwidth cited in the TI datasheet.
Recommended
Automotive Audio Amplifier Supply
In infotainment and external amplifier designs, the TPS7A4701QRGWRQ1 provides a low-noise analog rail for DACs and preamplifiers. The 4.2 uVRMS specification keeps the noise floor far below the audible threshold, preserving dynamic range of 24-bit audio paths. The enable pin allows sequencing with the audio DSP supply, and AEC-Q100 qualification covers the harsh automotive cabin thermal environment.
Recommended
Precision ADC/DAC Reference Rails
High-resolution data converters need supply noise well below 1 LSB; the TPS7A4701QRGWRQ1 delivers with 4.2 uVRMS output noise. It post-regulates a buck-derived 5V rail down to a clean 3.3V AVDD at up to 1A. Its high PSRR rejects upstream converter ripple, avoiding clock spurs folding into the converter output band, making it suitable for test-measurement and industrial data acquisition front ends.
Recommended
Industrial 24V Bus Post-Regulation
The 35V maximum input accommodates industrial 24V rails with transient headroom, letting the TPS7A4701QRGWRQ1 serve as a final cleanup regulator for PLC analog modules, sensors, and instrumentation. Feeding it from a wide-VIN buck (e.g., 24V to 6V) then regulating to 5V achieves both efficiency and sub-5-uVRMS noise. Thermal design must account for the series dropout dissipation at 1A loads.
Recommended
Automotive Body Electronics and Lighting
The enable pin supports power sequencing and sleep-mode control in body control modules, while AEC-Q100 qualification meets automotive reliability requirements. The TPS7A4701QRGWRQ1 can supply low-noise analog sense rails and microcontroller analog supplies in lighting drivers and gateway modules. Its 1A capacity covers multiple low-power loads from one regulator, reducing BOM count versus distributed small LDOs.
Recommended
Recommended Products Summary
Engineering reference data for TPS7A4701QRGWRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS7A4700QRGWRQ1 | TPS7A4701RGWR | LT3045 |
|---|---|---|---|---|
| Package | VQFN-20 (5x5 mm) EP | VQFN-20 (5x5 mm) - same | VQFN-20 (5x5 mm) - same | LFCSP - pinout differs |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Output Current | 1 A | 1 A | 1 A | 0.5 A |
| Maximum Input Voltage | 35 V | 35 V | 36 V | 15 V |
| Output Noise | 4.2 uVRMS | 4.2 uVRMS | 4.17 uVRMS | 0.8 uVRMS |
| Output Voltage Range | 1.4 V to 34 V | 1.4 V to 34 V | 1.4 V to 34 V | 1.0 V to 15 V |
| AEC-Q100 Qualification | Yes (Q1) | Yes (Q1) | No | No |
| Enable Pin | Yes | No | Yes | Yes |
Key Differentiators
- Automotive AEC-Q100 qualification at 1A and 4.2 uVRMS noise (vs LT3045)
- Enable pin for power sequencing in the Q1 family (vs TPS7A4700QRGWRQ1)
- PCB-programmable fixed output option (vs TPS7A4701RGWR)
Design Notes
At VIN=13.5V (automotive rail), VOUT=5V, and 1A load, dissipation is approximately 8.5W. The VQFN-20 PowerPAD must be soldered to a substantial ground pour - TI layout guidelines recommend an array of thermal vias to inner ground layers. Above roughly 2-3W dissipation, evaluate junction temperature against the datasheet thermal resistance and consider reducing VIN-VOUT delta with a switching preregulator.
Place a 10uF ceramic input capacitor and 10uF output capacitor as close to the IN and OUT pins as possible. Connect the NR/SS capacitor (typically 10nF to 1uF) to reduce output noise below the standalone 4.2 uVRMS figure and to control soft-start ramp. Follow TI TPS7A47-Q1 datasheet layout section for FB divider placement to avoid noise pickup.
Do not exceed 35V input including automotive load-dump transients - use a TVS or upstream wide-VIN preregulator. Use 1%-tolerance FB divider resistors to hold output accuracy, and do not omit the NR/SS capacitor in noise-critical designs. When substituting TPS7A4700QRGWRQ1 (no EN pin), tie the enable net appropriately on the shared footprint.
Compliance Information
AEC-Q100 qualified per TI Q1 designation and DigiKey/Mouser listings. RoHS/lead-free per TI standard product page.
