TPS7A8300RGRR - 2A Low-Noise LDO, 6uVRMS | Texas Instruments
MPN： TPS7A8300RGRR ✓ 啟用中TPS7A8300RGRR 概覽
An LDO (Low-Dropout) linear regulator is a voltage regulator that maintains a stable output even when the input voltage is very close to the output voltage. It is a subclass of linear regulators within the broader voltage regulator and power management IC hierarchy, essential for noise-sensitive circuits where switching regulators introduce unacceptable ripple and EMI.
Key features include the 6 uVRMS output noise (10 Hz to 100 kHz), the ANY-OUT architecture that lets the output voltage be programmed via PCB pin connections up to 3.95V without external resistors, and a power-good (PG) output. Enable and soft-start functions are integrated, along with overcurrent and thermal shutdown protection. Dropout of only 125 mV at 2 A enables high-efficiency, low-headroom designs.
Architecturally, the TPS7A8300 uses a PMOS pass element with a precision reference. Its low-VIN capability and ceramic-capacitor stability simplify BOM and layout. Excellent line/load regulation and high PSRR make it well suited to post-regulation of switching converter rails.
Typical applications include RF transceiver and PLL power rails, audio DAC/ADC supplies, FPGA and processor core voltages, and precision analog front-ends in industrial and communications equipment.
Design tip: solder the exposed pad to a substantial copper pour for thermal dissipation, configure the ANY-OUT sense pins correctly for the target voltage, and provide 10 uF ceramic output capacitance for stability.
直接替換替代品，適用於 TPS7A8300RGRR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
TPS7A8300RGRT
✅ 直接替換📋 參考替代品（不在目錄中）
TPS7A8300ARGRR
✅ 直接替換📋 參考替代品（不在目錄中）
TPS7A8300ARGRT
✅ 直接替換📋 參考替代品（不在目錄中）
TPS7A8300QRGRRQ1
✅ 直接替換聯絡詢價
查看資料表 →TPS7A8100RGWR
⚡ 相同封裝 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS7A8300RGRR 最大額定值與電氣特性
| 輸出類型 | Adjustable/Programmable (ANY-OUT) |
| 輸出電壓範圍 | 0.8 V to 5 V (up to 3.95 V via ANY-OUT pins) |
| 最大輸出電流 | 2 A |
| 壓降電壓 | 125 mV maximum at 2 A |
| 輸出雜訊 | 6 uVRMS (10 Hz to 100 kHz) |
| 功能特色 | Enable, Power Good, Soft Start |
| Protection | Overcurrent, Thermal Shutdown |
| 工作溫度 | -40C to +125C |
| 封裝 | 20-VQFN (3.5x3.5 mm), Exposed Pad |
| 安裝類型 | Surface Mount |
| Regulator Topology | PMOS LDO |
| Output Capacitor | Ceramic capacitor stable |
| RoHS 狀態 | Compliant |
| Pin Pitch | 0.5 mm |
TPS7A8300RGRR 腳位配置
| 腳位 1 | EN — Enable input (active high) |
| 腳位 2 | IN — Input supply voltage |
| 腳位 3 | IN — Input supply voltage |
| 腳位 4 | GND — Ground |
| 腳位 5 | GND — Ground |
| 腳位 6 | SS — Soft-start / feed-forward capacitor |
| 腳位 7 | PG — Power-good open-drain output |
| 腳位 8 | OUT — Regulated output voltage |
| 腳位 9 | OUT — Regulated output voltage |
| 腳位 10 | SENSE — Output voltage sense |
| 腳位 11 | NC/FB — ANY-OUT programming / feedback network connection |
| 腳位 20 | PAD — Exposed thermal pad - solder to ground pour |
典型應用
TPS7A8300RGRR 適用於 6 應用s: RF Transceiver and PLL Power Rails, FPGA and Processor Core Rails, Audio DAC and ADC Supplies, Industrial Precision Analog Front-Ends, Automotive Infotainment and ADAS Rails, Communications and Networking Equipment.
RF Transceiver and PLL Power Rails
The TPS7A8300's 6 uVRMS noise floor (10 Hz to 100 kHz) makes it ideal for powering PLLs, VCOs, and RF transceiver analog supplies where supply noise converts directly into phase noise. With only 125 mV maximum dropout at 2 A, it can post-regulate directly from a switching converter output without large headroom, preserving efficiency. Place it after a buck converter with 10 uF ceramic output capacitance to strip switching ripple; the result is a clean RF rail with no switching spurs in the synthesis path.
推薦
FPGA and Processor Core Rails
Processor and FPGA core rails often sit below 1.2V at multi-amp loads, and the TPS7A8300's 2-A capability, 0.8V minimum output, and 125 mV dropout let it deliver final-point-of-load regulation with tight accuracy. The power-good output supports rail sequencing and reset supervision, while soft-start controls inrush during power-up. Its ANY-OUT programming lets one PCB footprint serve multiple rail voltages across board variants without changing the BOM - a major advantage for processor families with several core-voltage options.
推薦
Audio DAC and ADC Supplies
Audio converter AVDD rails demand ultra-clean supplies because PSRR collapses at higher frequencies; the TPS7A8300's 6 uVRMS integrated noise and high PSRR keep the converter noise floor dominated by the silicon itself, not the regulator. The 2-A rating covers codec groups and differential output stages, and ceramic-capacitor stability allows compact 10 uF MLCC decoupling right at the AVDD pin. Unlike switching regulators used alone, this LDO adds no switching artifacts in the audio band, protecting SNR and THD specifications.
推薦
Industrial Precision Analog Front-Ends
Precision data converters and instrumentation amplifiers in industrial equipment are highly sensitive to supply-induced offset drift and noise. The TPS7A8300 regulates rails from 0.8V to 5V with excellent line and load regulation, and its enable pin supports power gating of analog sections to cut system quiescent power. Because it tolerates low headroom from upstream 24V-derived intermediate buses after a buck stage, it simplifies power tree design in PLC, test, and measurement analog front-ends while maintaining the low noise that ADS-class converters require.
推薦
Automotive Infotainment and ADAS Rails
For automotive designs, the pin-compatible AEC-Q100 qualified TPS7A8300QRGRRQ1 provides the same 2-A, 6 uVRMS performance with automotive qualification. It is used to clean up rails feeding ADAS processors, camera module analog supplies, and infotainment audio/DSP sections where battery-input switching converters leave ripple. The power-good output supports fault monitoring required in safety-relevant power trees, and the wide -40C to +125C operating range covers harsh underhood and cabin electronics environments.
推薦
Communications and Networking Equipment
Optical modules, Ethernet PHYs, and clocking circuits in switches and routers require low-noise rails with low dropout to maximize efficiency from constrained intermediate buses. The TPS7A8300's low-VIN capability and 125 mV dropout allow regulation from 1.5V or 1.8V distribution rails without sacrificing margin, while its 2-A capacity covers PHY and SerDes supplies. Power-good signaling integrates into system health monitoring, and the small 3.5x3.5 mm VQFN-20 conserves board area in high-density line-card layouts.
推薦
推薦產品摘要
工程參考資料，適用於 TPS7A8300RGRR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TPS7A8300RGRT | TPS7A8300ARGRR | TPS7A8300QRGRRQ1 |
|---|---|---|---|---|
| Package | 20-VQFN (3.5x3.5 mm) EP | 20-VQFN (3.5x3.5 mm) - same | 20-VQFN (3.5x3.5 mm) - same | 20-VQFN (3.5x3.5 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 2 A | 2 A | 2 A | 2 A |
| Output Voltage Range | 0.8 V to 5 V | 0.8 V to 5 V | 0.8 V to 5 V | 0.8 V to 5 V |
| Dropout Voltage (max) | 125 mV at 2 A | 125 mV at 2 A | 125 mV at 2 A | 125 mV at 2 A |
| Output Noise | 6 uVRMS | 6 uVRMS | 6 uVRMS | 6 uVRMS |
| ANY-OUT Programming | Yes (to 3.95 V, no resistors) | Yes | Yes | Yes |
| AEC-Q100 Qualified | No | No | No | Yes |
主要差異化特點
- ANY-OUT resistorless output programming (對比TPS7A8100RGWR)
- Automotive-qualified drop-in option (對比TPS7A8300QRGRRQ1)
- 125 mV dropout at full 2-A load (對比TPS7A8300ARGRR (baseline comparison))
設計說明
At low dropout (125 mV max at 2 A), dissipation is modest, but at larger VIN-VOUT deltas such as 3.3V to 1.2V at 2 A (4.2 W), the 3.5x3.5 mm VQFN-20 requires substantial copper. Solder the exposed pad to a ground pour of at least 1 square inch with via stitching to inner layers, and verify junction temperature stays below 125C at worst-case ambient.
Program the output voltage with the ANY-OUT pins by grounding the appropriate sense pins directly in the PCB layout - no external resistors are needed up to 3.95V. Place 10 uF ceramic input and output capacitors within 2 mm of the IN and OUT pins, and use the SS pin capacitor to set a controlled soft-start ramp that limits inrush into large core-rail capacitance.
Do not leave the SENSE pin disconnected from the output - regulation accuracy depends on remote sensing at the load point. The EN pin must not be left floating; tie it to IN for always-on operation. When using ANY-OUT pin strapping, verify the target voltage against the TI datasheet pin table, since each grounded pin adds a fixed offset and incorrect strapping produces an unexpected output.
合規資訊
RoHS compliant and lead-free per TI product page and distributor listings. Not AEC-Q100 qualified - use TPS7A8300QRGRRQ1 for automotive. REACH/halogen declarations per date code on TI quality portal.
