TPS7A4701QRGWRQ1 - 1A 35V Ultra-Low Noise LDO | TI Automotive
MPN: TPS7A4701QRGWRQ1 ✓ Hoạt động| Số lượng | Giá đơn vị | Phụ |
|---|---|---|
| 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 |
TPS7A4701QRGWRQ1 Tóm tắt
An LDO (low-dropout regulator) is a type of linear voltage regulator that maintains a stable output voltage even when the input is only slightly higher than the output. Within the power management IC hierarchy, the TPS7A47-Q1 sits at the precision post-regulation stage, typically cleaning up noisy switching-converter rails for sensitive analog loads.
Key features include 4.2 uVRMS output noise (20 Hz to 100 kHz), very high PSRR that suppresses upstream DC-DC ripple, an enable pin for power sequencing, thermal shutdown, and bipolar process technology optimized for RF and analog performance. According to TI datasheet for TPS7A47-Q1, the device is designed primarily for noise-critical RF signal chains.
Typical applications include automotive ADAS sensor power supplies, RF PLL/VCO rails, high-end audio DAC supplies, and precision data-converter reference rails. The 35V input tolerance supports automotive 12V and industrial 24V buses with load-dump headroom.
Design consideration: at large VIN-VOUT deltas and 1A load, power dissipation is significant - ensure adequate PCB copper area on the exposed pad. Prices as of 2026-08-29.
Bộ thay thế dễ dàng lắp đặt cho TPS7A4701QRGWRQ1 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TPS7A4701QRGWRQ1 (cùng hình factor và footprint) — khác nhau ở Input Voltage Range, Output Noise, Output Type, Output Voltage Range.
Công cụ so sánh nhanh — Chọn các bộ phận thay thế để so sánh song song:
TPS7A4700QRGWRQ1
Liên hệ để biết giá
Xem tài liệu →TPS7A4701RGWR
✗ Hết hàng
$3.2467 / Đơn vị
Xem tài liệu →TPS7A4701QRGWTQ1
📋 Tham chiếu thay thế (không có trong danh mục)
TPS7A4701-EP
📋 Tham chiếu thay thế (không có trong danh mục)
LT3045
📋 Tham chiếu thay thế (không có trong danh mục)
TPS7A4701QRGWRQ1 Tỷ lệ tối đa & tính chất điện
| Kiểu đầu ra | Adjustable/Programmable |
| Khoảng điện áp đầu ra | 1.4 V to 34 V (adjustable), up to 20.5 V (PCB-programmable) |
| Điện áp tối đa đầu ra | 1 A |
| Phạm vi điện áp đầu vào | Up to 35 V |
| Tiếng ồn đầu ra | 4.2 uVRMS (20 Hz to 100 kHz) |
| Regulator Topology | LDO (Low-Dropout Linear Regulator) |
| Số lượng đầu ra | 1 |
| Polarity | Positive |
| Technology | Bipolar |
| N Nap kích hoạt | Yes |
| Protection Features | Thermal shutdown, current limit |
| Qualification | AEC-Q100 (Automotive) |
| Hộp | 20-VQFN (5x5 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Packaging | Tape & Reel (T/R) |
Cấu hình chân TPS7A4701QRGWRQ1
| Chân 1-4 | IN — Input supply voltage (up to 35V) |
| Chân 5-8 | OUT — Regulated output voltage |
| Chân 9 | EN — Enable (active high) |
| Chân 10 | NR/SS — Noise reduction / soft-start capacitor |
| Chân 11 | FB — Feedback for adjustable output |
| Chân 12-15 | GND — Ground |
| Chân 16-20 | GND/Pad — Ground and exposed thermal pad |
| Chân PAD | PowerPAD — Exposed thermal pad, must be soldered to PCB ground |
Ứng dụng tiêu biểu
TPS7A4701QRGWRQ1 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS7A4701QRGWRQ1 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Automotive AEC-Q100 qualification at 1A and 4.2 uVRMS noise (vsLT3045)
- Enable pin for power sequencing in the Q1 family (vsTPS7A4700QRGWRQ1)
- PCB-programmable fixed output option (vsTPS7A4701RGWR)
Ghi chú thiết kế
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.
Thông tin tuân thủ
AEC-Q100 qualified per TI Q1 designation and DigiKey/Mouser listings. RoHS/lead-free per TI standard product page.
