TPS7A4700RGWR - 36V 1A Ultralow-Noise LDO Reg | TI
MPN: TPS7A4700RGWR ✓ 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 |
| 3,000 | $2.78 | $8,340.00 |
Drop-in alternatives for TPS7A4700RGWR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS7A4701RGWR
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →TPS7A4701RGWR-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS7A4700RGWT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS7A4701RGWT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS7A4700RGWR Maximum Ratings & Electrical Characteristics
| Manufacturer | Texas Instruments |
| Product Type | Linear Voltage Regulator IC (LDO) |
| Output Type | Positive Adjustable |
| Number of Outputs | 1 |
| Output Current | 1 A |
| Input Voltage Range | 3 V to 36 V |
| Output Voltage Range | User-programmable up to 20.5 V via PCB layout |
| Output Noise | 4.17 uVRMS (family datasheet; 4 uVRMS typ) |
| Package | VQFN-20 (5x5 mm) |
| Mounting Type | Surface Mount |
| Technology | Bipolar |
| PSRR | [DATA_NEEDED: PSRR] |
| Dropout Voltage | [DATA_NEEDED: Dropout voltage] |
| Quiescent Current | [DATA_NEEDED: Quiescent current] |
| Enable Pin | [DATA_NEEDED: Enable pin availability for TPS7A4700] |
| Operating Temperature Range | [DATA_NEEDED: Operating temperature range] |
| RoHS Status | Unknown (not specified in verified data) |
| MSL Level | [DATA_NEEDED: MSL level] |
TPS7A4700RGWR vqfn-20 (5x5 mm) Pin Configuration Guide
Complete pinout information for TPS7A4700RGWR (vqfn-20 (5x5 mm) package) with 20 pins. This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for TPS7A4700RGWR.
Refer to the datasheet for full pin configuration.
Estimated pin count: 20 pins (power package)
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
TPS7A4700RGWR is suitable for 6 applications: Precision ADC Analog Supply, RF Transceiver and PLL/VCO Power Rail, High-End Audio DAC Power Supply, Industrial Sensor Signal Conditioning, Medical Diagnostic Instrumentation, Portable Battery-Powered Precision Instrumentation.
Precision ADC Analog Supply
The TPS7A4700RGWR is well-suited to power precision ADCs and analog front ends because its 4.17 uVRMS output noise does not degrade the ADC noise floor; a 24-bit ADC like AD7175-8BCPZ needs a clean 5V AVDD rail to maintain full dynamic range. The LDO accepts 3V to 36V input, so it can be placed after a 12V or 24V intermediate bus. The PCB-programmable output up to 20.5V minimizes external noise-coupling components. For best performance, place 10uF ceramics adjacent to the ADC AVDD pins and use the exposed VQFN-20 pad for thermal relief.
Recommended
RF Transceiver and PLL/VCO Power Rail
Ultralow-noise rails are essential for RF synthesizers and transceivers because phase noise and spurious tones can be modulated by supply ripple. The TPS7A4700RGWR bipolar high-PSRR architecture and 4.17 uVRMS noise suppress residual ripple from preceding DC-DC converters, preserving VCO phase noise. With 1A capability, it can power a complete RF front end such as AD9361BBCZ in TDD operation. Route the output via a star point to analog and RF loads, and avoid shared ground return with digital switching currents to maintain performance.
Recommended
High-End Audio DAC Power Supply
Audio DACs and I/V converters require quiet analog rails; even microvolts of supply noise can appear in the audible band. The TPS7A4700RGWR delivers 1A with 4.17 uVRMS noise and has no switching artifacts, unlike a buck converter. It can be used with ADA4945-1ACPZ or AD8620ARZ in a DAC output stage. Because the output is programmed by PCB layout, the feedback path is short and less susceptible to EMI. Keep audio ground clean and separate from the regulator power ground to avoid ground-loop hum.
Recommended
Industrial Sensor Signal Conditioning
Industrial 4-20mA loops and sensor bridges often run from 24V supplies with high ripple. The TPS7A4700RGWR accepts 36V input, so it can regulate directly from 24V rails with margin. Its low noise preserves the resolution of bridge amplifiers like AD8421BRZ and 24-bit ADC AD7172-2BRUZ, preventing 50/60Hz and switching noise from limiting measurement accuracy. The VQFN-20 package with exposed pad allows operation over industrial temperature ranges when PCB thermal design is adequate. Use proper bypassing on IN and OUT for transient immunity.
Recommended
Medical Diagnostic Instrumentation
Medical diagnostic equipment such as patient monitors and laboratory analyzers requires repeatable, low-noise analog supplies. The TPS7A4700RGWR 4.17 uVRMS output helps maintain the signal-to-noise ratio of biopotential and optical front ends. Its 3V to 36V input range fits battery or isolated power architectures. When paired with precision converters like AD7175-8BCPZ and amplifiers like AD8421BRZ, the overall system can achieve stable baseline performance. Ensure the regulator output capacitor follows the TI recommended value and place it close to the load to maintain transient response.
Recommended
Portable Battery-Powered Precision Instrumentation
For battery-operated meters and portable data acquisition, the TPS7A4700RGWR offers low-dropout operation from a 3V to 36V source, extending usable battery life. Although a linear regulator is less efficient than a buck converter at high current, the 1A rating can power short-duration measurement bursts; low quiescent current and low noise are key. The no-external-resistor PCB-programmed output reduces board area and component count in compact designs. Pair with low-power ADCs such as AD7988-5BCPZ and precision op-amps like ADA4610-2ARZ to maintain accuracy while minimizing footprint.
Recommended
Recommended Products Summary
Engineering reference data for TPS7A4700RGWR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS7A4701RGWR | TPS7A4701RGWR-Q1 | TPS7A4700RGWT | TPS7A4701RGWT |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-20 (5x5 mm) | VQFN-20 (5x5 mm) - same | VQFN-20 (5x5 mm) - same | VQFN-20 (5x5 mm) - same | VQFN-20 (5x5 mm) - same |
| Output Current | 1 A | 1 A | 1 A | 1 A | 1 A |
| Input Voltage Range | 3 V to 36 V | 3 V to 36 V | 3 V to 36 V | 3 V to 36 V | 3 V to 36 V |
| Output Voltage Range | User-programmable up to 20.5 V via PCB layout | Adjustable via external resistor; [DATA_NEEDED] | Adjustable via external resistor; [DATA_NEEDED] | User-programmable up to 20.5 V via PCB layout | Adjustable via external resistor; [DATA_NEEDED] |
| Output Noise | 4.17 uVRMS | 4.17 uVRMS | 4.17 uVRMS | 4.17 uVRMS | 4.17 uVRMS |
| Enable Pin | [DATA_NEEDED] | Yes | Yes | [DATA_NEEDED] | Yes |
| Automotive Grade | No (not AEC-Q100 qualified) | No | Yes (AEC-Q100) | No | No |
Key Differentiators
- No external feedback resistors or feed-forward capacitors needed (vs TPS7A4701RGWR)
- Lower cost for non-automotive markets (vs TPS7A4701RGWR-Q1)
- Engineering-sample friendly cut-tape ordering (vs TPS7A4700RGWT)
Design Notes
The TPS7A4700RGWR can dissipate significant power when the input-to-output differential is large. For example, with VIN = 12V and VOUT = 5V at 1A, power dissipation is 7W. The VQFN-20 exposed thermal pad must be soldered to a copper plane with thermal vias to keep the junction temperature within limits. If the dropout voltage is high, consider using a DC-DC pre-regulator to reduce LDO power loss. Always calculate (VIN - VOUT) x IOUT and compare with the package thermal resistance before finalizing the layout.
The TPS7A4700RGWR output voltage is set by the PCB layout pattern, not by external resistors. Follow the TI application layout guidance for the TPS7A47 family exactly; the sense trace must be routed directly from the output capacitor to the regulator sense point and kept away from switching nodes. A noisy sense trace directly shifts the programmed output voltage. Keep the feedback trace short, shielded by ground, and place the output capacitor as close to the VQFN-20 OUT pin as possible.
Do not attempt to adjust TPS7A4700RGWR with external feedback resistors as if it were TPS7A4701RGWR. The 4700 variant is designed for PCB-layout programming up to 20.5V; applying external resistors may lead to incorrect regulation or instability. For applications requiring an external adjustable resistor divider, choose TPS7A4701RGWR. Always verify the output voltage on the first prototype board before populating sensitive analog loads.
Compliance Information
Compliance status was not provided in the verified web data. TI product pages generally indicate RoHS and REACH status, but the snippets available do not contain explicit declarations. AEC-Q100 information is not available for the standard TPS7A4700RGWR; use TPS7A4701RGWR-Q1 for automotive.
