TPS7A4700QRGWRQ1 - 1A 36V 4.2uVRMS Automotive LDO | TI
MPN: TPS7A4700QRGWRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.1 | $6.10 |
| 10 | $5.49 | $54.90 |
| 100 | $4.6 | $460.00 |
| 500 | $4.1 | $2,050.00 |
| 1,000 | $3.65 | $3,650.00 |
Drop-in alternatives for TPS7A4700QRGWRQ1 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:
TPS7A4701QRGWRQ1
β Drop-Inβ In Stock
$3.48 / Unit
View Datasheet βTPS7A4700RGWR
β Drop-Inβ In Stock
$3.3 / Unit
View Datasheet βTPS7A4701RGWR
β Drop-Inβ In Stock
$3.1 / Unit
View Datasheet βLT3045
β Drop-Inπ Reference alternative (not in catalog)
ADM7150
β Drop-Inπ Reference alternative (not in catalog)
TPS7A4700QRGWRQ1 Maximum Ratings & Electrical Characteristics
| Output Type | Adjustable / PCB-Programmable |
| Output Voltage Range | Up to 34 V (adjustable), up to 20.5 V (PCB-programmable) |
| Maximum Output Current | 1 A |
| Input Voltage Range | Up to 35 V (Q1 rating) |
| Output Noise | 4.2 uVRMS (10 Hz to 100 kHz) |
| PSRR | [DATA_NEEDED: PSRR value at 1 kHz] |
| Dropout Voltage | [DATA_NEEDED: dropout voltage at 1 A] |
| Quiescent Current | [DATA_NEEDED: quiescent current] |
| Technology | Bipolar |
| Grade | Automotive (AEC-Q100, Q1) |
| Enable Pin | Yes (per TI TPS7A47-Q1 product page) |
| Package | VQFN-20 (RGW) 5x5 mm with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | [DATA_NEEDED: operating temperature range] |
| RoHS Status | [DATA_NEEDED: RoHS status] |
| Reel Quantity | [DATA_NEEDED: standard reel quantity] |
TPS7A4700QRGWRQ1 Pin Configuration
| Pin 1 | IN β Input supply voltage (up to 35 V) |
| Pin 2 | IN β Input supply voltage |
| Pin 3 | IN β Input supply voltage |
| Pin 4 | GND β Ground |
| Pin 5 | GND β Ground |
| Pin 6 | EN β Enable input (per TI product page; verify pin map in datasheet) |
| Pin 7 | NR/SS β Noise reduction / soft-start |
| Pin 8 | FB β Feedback for adjustable output |
| Pin 9 | OUT β Regulated output voltage |
| Pin 10 | OUT β Regulated output voltage |
| Pin 11 | PAD β Exposed thermal pad - solder to GND plane |
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
TPS7A4700QRGWRQ1 is suitable for 6 applications: Automotive Radar and RF Rail Power, Precision ADC and DAC Analog Supply, Operational Amplifier Supply Rails, Audio DAC and Headphone Amplifier Power, Industrial 24V Instrumentation Rails, Automotive Infotainment and Cluster Supplies.
Automotive Radar and RF Rail Power
The TPS7A4700QRGWRQ1 powers PLL/VCO and RF transceiver rails in automotive radar modules, where phase noise is directly set by supply noise. Its 4.2 uVRMS output noise and high PSRR attenuate ripple from upstream DC-DC converters fed by the 12V automotive battery rail. Place the LDO after a buck pre-regulator with 10uF ceramic capacitors on input and output; the 35V input rating covers load-dump-clamped conditions without an extra protection stage.
Recommended
Precision ADC and DAC Analog Supply
High-resolution data converters degrade directly with supply noise, making the 4.2 uVRMS TPS7A4700QRGWRQ1 an ideal AVDD source for precision ADCs and DACs in instrumentation. Its bipolar architecture avoids the 1/f noise penalties of many CMOS LDOs, and the PCB-programmable output option (up to 20.5V) removes the feedback divider from the noise path. A 10uF output capacitor plus optional noise-reduction capacitor yields a rail clean enough for 24-bit converter front ends.
Recommended
Operational Amplifier Supply Rails
Precision op-amp signal chains inherit the noise floor of their supplies; the TPS7A4700QRGWRQ1's 4.2 uVRMS noise preserves the low noise of parts like the OPA211 and OPA827. The high PSRR rejects switching-ripple residue from upstream converters, and the 35V rating supports higher-voltage analog rails used in industrial test and measurement. Decouple each op-amp supply pin locally with 100nF ceramics in addition to the LDO output capacitance.
Recommended
Audio DAC and Headphone Amplifier Power
In automotive and premium audio systems, the TPS7A4700QRGWRQ1 supplies audio DAC and amplifier rails where noise below the audible threshold is mandatory. The 4.2 uVRMS noise floor sits far below the DAC dynamic range limit, and high PSRR keeps switching converter artifacts out of the signal path. Unlike a buck converter alone, post-regulating with this LDO adds no switching spurs at the cost of linear-stage power dissipation.
Recommended
Industrial 24V Instrumentation Rails
Industrial test and measurement equipment running from 24V buses benefits from the 35V input rating and bipolar precision architecture of the TPS7A4700QRGWRQ1. It regulates directly from rectified 24V supplies without a pre-drop stage for mid-range output voltages, delivering up to 1A. Verify thermal design first: at 24V-in to 5V-out and 1A, dissipation reaches 19W, so for high-current high-drop cases use a switching pre-regulator followed by this LDO for final low-noise regulation.
Recommended
Automotive Infotainment and Cluster Supplies
Infotainment SoC peripheral rails, sensor supplies, and display analog rails in vehicles demand both low noise and AEC-Q100 qualification - exactly the profile of the TPS7A4700QRGWRQ1. Its enable function supports power sequencing alongside TI automotive PMIC families, and the VQFN-20 footprint supports compact ECUs. Post-regulate a buck converter output to combine efficiency with the low-noise analog rail quality displays and tuners require.
Recommended
Recommended Products Summary
Engineering reference data for TPS7A4700QRGWRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS7A4701QRGWRQ1 | TPS7A4700RGWR | TPS7A4701RGWR |
|---|---|---|---|---|
| Package | VQFN-20 (RGW) 5x5 mm | VQFN-20 (RGW) - same footprint | VQFN-20 (RGW) - same footprint | VQFN-20 (RGW) - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Automotive Grade (AEC-Q100) | Yes (Q1) | Yes (Q1) | No (commercial) | No (standard grade) |
| Maximum Output Current | 1 A | 1 A | 1 A | 0.5 A |
| Output Noise | 4.2 uVRMS | 4.2 uVRMS | 4.17 uVRMS | 0.8 uVRMS |
| Maximum Input Voltage | 35 V (Q1 rating) | 35 V | 35 V (36 V family rating) | 15 V |
| Enable Pin | Yes (per TI product page) | Yes (precision enable) | No | Yes |
| Approx. Price (1 pc, as of 2026-08-29) | ~$6.10 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- AEC-Q100 automotive qualification on the low-noise TPS7A47 die (vs TPS7A4700RGWR)
- 35V input with 1A output vs. cross-brand low-noise LDOs (vs LT3045)
- Trade-off: LT3045 has lower noise (vs LT3045)
Design Notes
Linear dissipation is P = (VIN - VOUT) x IOUT. At 12V-to-5V, 1A, the device dissipates 7W, exceeding what a bare VQFN-20 can handle. Solder the exposed pad to a minimum 1 square inch of 2oz copper on the top layer with thermal vias to inner planes, and derate output current as VIN-VOUT grows. Verify junction temperature stays within the datasheet limit at maximum ambient.
Place the 10uF input and output ceramic capacitors within 2-3 mm of their pins to minimize parasitic inductance and preserve loop stability. Keep the NR/SS capacitor trace short and away from switching nodes to avoid noise coupling into the reference. Follow the TI TPS7A47-Q1 datasheet layout section for the PCB-programmable output strapping when using the pin-programmed option.
Do not exceed the 35V input rating during automotive load dump unless upstream clamping exists. When using the adjustable mode, use 1%-tolerance feedback resistors to preserve output accuracy, and route the FB trace away from inductive loads. Do not omit the output capacitor - stability depends on it. Confirm EN pin behavior if reusing a TPS7A4700 layout for TPS7A4701 or vice versa.
Compliance Information
AEC-Q100 qualification confirmed via TI TPS7A47-Q1 product page and Q1 ordering nomenclature. RoHS/REACH status not stated in provided data - confirm on TI.com quality pages.
