TPS73501QDRBRQ1 - 500mA Low-Noise LDO, AEC-Q100 | TI
MPN： TPS73501QDRBRQ1 ✓ 啟用中TPS73501QDRBRQ1 概覽
An LDO (low-dropout regulator) is a type of linear voltage regulator that maintains a regulated output even when the input voltage is only slightly above the output. Within the power management IC hierarchy, LDOs sit downstream of switching converters to provide clean, low-noise rails for noise-sensitive loads. Unlike DC-DC buck converters, an LDO adds no switching ripple, trading efficiency for output purity.
Key features of the TPS735-Q1 family include 500-mA output current capability, very low dropout voltage for high-efficiency operation, low quiescent current that extends battery and standby life, and high PSRR that suppresses upstream switching-converter ripple. The enable pin (active functionality confirmed by TI product page) supports rail sequencing in multi-supply systems. The VSON-8 (DRB) package with exposed pad provides good thermal performance for a compact footprint.
The device uses a low-noise architecture with a precision reference; for lowest output noise, an optional noise-bypass/noise-reduction capacitor at the NR pin reduces reference noise bandwidth (refer to TI datasheet). Internal protection includes current limit and thermal shutdown.
Typical applications include automotive ADAS camera and radar module power rails, infotainment audio/RF supplies, cluster displays, and post-regulation of 3.3V or 5V switching rails in industrial systems requiring low-noise analog rails.
Design tip: with a 5V input and 3.3V output at 500 mA, the device dissipates about 0.85W; verify junction temperature using the DRB package theta_JA with adequate PCB copper on the exposed thermal pad, per TI layout guidelines.
直接替換替代品，適用於 TPS73501QDRBRQ1 — 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。
此系列的變體
與下列產品可直接替換的同系列型號： TPS73501QDRBRQ1 （相同外形與佔位） — 差異在於 Output Type, Package, Maximum Output Current, Automotive Qualification.
TPS73501DRBR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →TPS73533QDRBRQ1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS74801QDRCRQ1
✅ 直接替換聯絡詢價
查看資料表 →TPS73501QDRBRQ1 最大額定值與電氣特性
| 輸出類型 | Positive Adjustable (1 output) |
| 輸出電壓範圍 | 1.25 V to 6 V |
| 最大輸出電流 | 500 mA |
| 拓撲 | LDO (Low-Dropout Linear Regulator) |
| 致能腳位 | Yes |
| 工作溫度 | -40C to +125C |
| 封裝 | 8-SON / VSON (DRB), 3x3 mm |
| 安裝類型 | Surface Mount |
| Automotive Qualification | AEC-Q100 Qualified |
| RoHS 狀態 | Compliant |
TPS73501QDRBRQ1 腳位配置
| 腳位 1 | IN — Input supply voltage |
| 腳位 2 | GND — Ground |
| 腳位 3 | EN — Enable input (active high) |
| 腳位 4 | NR/SS — Noise reduction / soft-start capacitor |
| 腳位 5 | FB — Feedback for adjustable output |
| 腳位 6 | OUT — Regulated output voltage |
| 腳位 7 | NC — [DATA_NEEDED: pin function] |
| 腳位 8 | NC — [DATA_NEEDED: pin function] |
| 腳位 Pad | Thermal Pad — Exposed pad - solder to ground pour for thermal dissipation |
典型應用
TPS73501QDRBRQ1 適用於 6 應用s: Automotive ADAS Camera Module Power, Automotive Radar Module Supply, Infotainment Audio Power, Cluster and Display Rails, Body Electronics and Gateway Modules, Industrial Precision Analog Post-Regulation.
Automotive ADAS Camera Module Power
Image sensor and SERDES analog rails in automotive cameras demand ultra-clean supplies; switching regulator ripple directly raises sensor read-noise. The TPS73501QDRBRQ1, with AEC-Q100 qualification, low output noise, and high PSRR, post-regulates a 3.3V or 5V buck output down to sensor AVDD rails at up to 500 mA. Placing the LDO after the switcher removes mV-level ripple while the enable pin supports the camera module power-up sequence required by ASIL-style designs.
推薦
Automotive Radar Module Supply
Radar transceiver (mmWave) supplies are exquisitely noise-sensitive: phase noise on the PA/LO rails degrades detection performance. The TPS73501QDRBRQ1 provides an adjustable 1.25V-6V, 500-mA rail with high PSRR that suppresses upstream DC-DC ripple before it reaches RF blocks. Its -40C to +125C AEC-Q100 rating covers harsh engine-bay-adjacent mounting, and the VSON-8 DRB exposed pad allows compact thermal management within dense radar PCB real estate.
推薦
Infotainment Audio Power
Audio amplifiers and codecs require supply noise far below the audible floor; power-supply ripple appears directly as output hum and hiss. The TPS73501QDRBRQ1's low-noise, high-PSRR profile makes it well suited to powering audio codecs and preamp stages at up to 500 mA from a 5V rail, with the NR pin configuration per datasheet reducing reference noise. AEC-Q100 qualification satisfies infotainment environmental requirements without a second qualification effort.
推薦
Cluster and Display Rails
Automotive instrument clusters and displays combine switching regulators for backlight LED current with sensitive display driver and serializer supplies. The TPS73501QDRBRQ1 post-regulates at 500 mA for display timing-controller and serializer analog rails, where high PSRR keeps backlight switching artifacts out of the LVDS/ SerDes signal path. Its enable pin enables sequencing of display rails during ignition power-up, and the -40C to +125C range handles cabin and dashboard thermal extremes.
推薦
Body Electronics and Gateway Modules
Body control modules and gateways host CAN/LIN transceivers and low-power MCUs whose analog rails benefit from low quiescent current and clean regulation under always-on standby conditions. The TPS73501QDRBRQ1's low-IQ design minimizes key-off battery drain while supplying up to 500 mA during active modes. TCAN-family transceivers and MSPM0 MCUs can be fed from this LDO, and its AEC-Q100 status aligns with automotive body electronics qualification requirements.
推薦
Industrial Precision Analog Post-Regulation
In test and measurement and factory automation systems, precision ADCs and amplifiers need low-noise rails despite noisy 24V-derived intermediate buses. Although the TPS73501QDRBRQ1 targets automotive, its 500-mA, high-PSRR adjustable output works in industrial post-regulation after a 5V or 6V intermediate rail. Designers should confirm headroom: keeping VIN-VOUT modest limits dissipation while the DRB exposed pad, soldered to a copper pour, handles the remaining thermal load.
推薦
推薦產品摘要
工程參考資料，適用於 TPS73501QDRBRQ1 — 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 | TPS73501DRBR | TPS74801QDRCRQ1 | NCP703 |
|---|---|---|---|---|
| Package | VSON-8 (DRB) 3x3 mm | VSON-8 (DRB) 3x3 mm - same | VSON-8 (DRB) 3x3 mm - same | SOIC-8 - different package |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Low-Noise / High-PSRR Positioning | Yes | Yes | Yes (low-IQ family) | Low noise |
主要差異化特點
- Automotive AEC-Q100 qualification in compact VSON-8 (對比TPS73501DRBR)
- Low quiescent current with 500-mA capability (對比TPS74801QDRCRQ1)
- Adjustable output flexibility (對比TPS73533QDRBRQ1)
設計說明
With 5V input, 3.3V output at full 500-mA load, the TPS73501QDRBRQ1 dissipates approximately 0.85W. The VSON-8 (DRB) package relies on its exposed pad for heat removal; theta_JA depends heavily on PCB copper area. Follow the TI datasheet layout guideline of a solid ground pour with multiple thermal vias under the pad. If dissipation exceeds about 1W, consider a two-stage regulation (buck plus LDO) to split the thermal load.
Place the input capacitor (1uF-10uF ceramic per datasheet recommendation) within a few millimeters of the IN pin, and the output capacitor close to OUT. The exposed thermal pad is the primary ground connection - do not treat it as optional; use a 4x4 via array to the ground plane. Keep the FB resistor divider traces short and away from switching nodes to prevent noise injection into the regulation loop.
Do not leave the NR/SS pin floating if lowest output noise is required - the noise-reduction capacitor reduces reference noise bandwidth per the TPS735-Q1 datasheet typical applications. Ensure the enable pin is not left floating in noise-sensitive systems; tie it through a divider to the input rail if sequencing is not needed. Verify output voltage accuracy using 1% tolerance resistors on the FB divider.
合規資訊
AEC-Q100 automotive qualification confirmed by TI product page (TPS735-Q1). RoHS/lead-free status typical for TI active parts but explicit certificates not present in provided data.
