TPS7A6333QPWPRQ1 - 300mA 40V Automotive LDO | Texas Instruments
MPN： TPS7A6333QPWPRQ1 ✓ 啟用中TPS7A6333QPWPRQ1 概覽
A low-dropout regulator (LDO) is a linear voltage regulator that maintains a regulated output voltage even when the input supply is only slightly above the output. This category of voltage regulator sits within the power management IC hierarchy, providing clean, low-noise rails for sensitive loads. The TPS7A6333QPWPRQ1 features an ultra-low quiescent current of 35 µA (typical) at light loads and a sleep mode current of less than 2 µA when the enable pin is pulled low, reducing battery drain in always-on systems.
Key features of this device include a 300mV dropout voltage at maximum output current, an integrated programmable window watchdog timer, and overcurrent protection. The LDO is stable with low-ESR ceramic output capacitors, simplifying external component selection and board layout. Its HTSSOP-14 (PWP) package with exposed pad provides good thermal performance, while the AEC-Q100 qualification ensures reliability in automotive environments.
The TPS7A6333QPWPRQ1 is designed for off-battery supply rails in automotive ECUs, body control modules, and infotainment systems. The watchdog timer monitors the microcontroller and provides an independent reset mechanism, improving system reliability. The device also provides robust protection against overcurrent, safeguarding downstream loads.
When using this LDO, designers must ensure sufficient input-output voltage headroom to maintain regulation under load transients. The enable pin allows power sequencing, and the watchdog output should be connected to the system reset line for proper fault monitoring. Consult the TI datasheet for detailed application circuits and layout guidelines.
直接替換替代品，適用於 TPS7A6333QPWPRQ1 — 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。
TPS7A6301QPWPRQ1
✅ 直接替換📋 參考替代品（不在目錄中）
TPS7A6350QPWPRQ1
⚡ 相同封裝📋 參考替代品（不在目錄中）
TPS7A6401QPWPRQ1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS7A6318QPWPRQ1
⚡ 相同封裝 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS7A6325QPWPRQ1
⚡ 相同封裝 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS7A6333QPWPRQ1 最大額定值與電氣特性
| 輸出類型 | Fixed |
| 輸出電壓 | 3.3 V |
| 最大輸出電流 | 300 mA |
| Input Voltage (Max) | 40 V |
| Transient Input Voltage | 45 V |
| 壓降電壓 | 300 mV at 300 mA |
| 靜態電流 | 35 µA (typ) at light loads |
| Sleep Current | < 2 µA when EN = Low |
| 封裝 | HTSSOP-14 (PWP) |
| 安裝類型 | Surface Mount |
| Watchdog Timer | Integrated programmable window watchdog |
| 過電流保護 | Yes |
| Lead Free | Lead Free |
| RoHS 狀態 | RoHS Compliant |
| AEC-Q100 | Qualified |
TPS7A6333QPWPRQ1 腳位配置
| 腳位 1 | IN — Input supply |
| 腳位 2 | IN — Input supply |
| 腳位 3 | IN — Input supply |
| 腳位 4 | EN — Enable input |
| 腳位 5 | WDI — Watchdog input |
| 腳位 6 | WDO — Watchdog output |
| 腳位 7 | GND — Ground |
| 腳位 8 | GND — Ground |
| 腳位 9 | NC — No connect |
| 腳位 10 | NC — No connect |
| 腳位 11 | NC — No connect |
| 腳位 12 | OUT — Regulated output |
| 腳位 13 | OUT — Regulated output |
| 腳位 14 | OUT — Regulated output |
典型應用
TPS7A6333QPWPRQ1 適用於 6 應用s: Automotive ECU Power Supply, Body Control Module, Infotainment System, Battery Management System, ADAS Sensor Power, Industrial Battery-Powered Sensor.
Automotive ECU Power Supply
The TPS7A6333QPWPRQ1 provides a clean 3.3V rail for automotive ECUs, with 40V input tolerance and 45V transient handling. Its 300mA output can supply microcontrollers and sensors, while the integrated watchdog timer monitors system health. The LDO's low quiescent current of 35µA reduces battery drain in standby modes, critical for always-on automotive systems.
推薦
Body Control Module
In body control modules, the TPS7A6333QPWPRQ1 delivers a regulated 3.3V from the 12V battery rail. Its 300mV dropout at 300mA ensures efficient operation under battery voltage dips. The watchdog timer provides independent monitoring of the microcontroller, enabling fail-safe reset mechanisms. Off-battery operation up to 40V accommodates load dump conditions without external protection.
推薦
Infotainment System
The TPS7A6333QPWPRQ1 supplies 3.3V to infotainment processing units, with noise-sensitive audio and display circuitry. The LDO's low quiescent current helps minimize heat in the compact enclosure. Its 45V transient rating protects against automotive voltage spikes from alternator load changes. The 300mA current capability supports multiple peripherals such as USB bridges and display drivers.
推薦
Battery Management System
The TPS7A6333QPWPRQ1 provides a stable 3.3V reference rail for battery management ICs. Its 35µA quiescent current is essential for minimizing self-discharge in battery packs. The watchdog timer can be used to monitor the BMS controller, ensuring safe operation. The wide 40V input range allows direct connection to the battery voltage, eliminating the need for a pre-regulator.
推薦
ADAS Sensor Power
For ADAS radar and camera modules, the TPS7A6333QPWPRQ1 provides a clean 3.3V rail to sensitive analog front-ends. The LDO's high input voltage tolerance and automotive qualification meet the stringent reliability requirements of safety-critical systems. Its integrated watchdog offers an additional layer of system protection, while the 300mA output can power image sensors and radar processors.
推薦
Industrial Battery-Powered Sensor
The TPS7A6333QPWPRQ1 is well suited for industrial sensors operating from 24V or 48V buses. Its low quiescent current extends battery life in wireless sensor nodes. The 40V input capability allows direct connection to industrial supply rails, and the watchdog timer can reset a hung microcontroller. The 300mA output can power sensors, transceivers, and signal conditioning circuits.
推薦
推薦產品摘要
工程參考資料，適用於 TPS7A6333QPWPRQ1 — 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 | TPS7A6301QPWPRQ1 | TPS7A6350QPWPRQ1 | TPS7A6401QPWPRQ1 | TPS7A6318QPWPRQ1 |
|---|---|---|---|---|---|
| Package | HTSSOP-14 (PWP) | HTSSOP-14 (PWP) - same | HTSSOP-14 (PWP) - same | HTSSOP-14 (PWP) - same | HTSSOP-14 (PWP) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage (Max) | 40 V | 40 V | 40 V | 40 V | 40 V |
| Watchdog Timer | Yes | Yes | Yes | Yes | Yes |
| AEC-Q100 Qualification | Yes | Yes | Yes | Yes | Yes |
主要差異化特點
- Integrated programmable window watchdog (對比TPS7A6301QPWPRQ1)
- Fixed 3.3V output eliminates external components (對比TPS7A6301QPWPRQ1)
- Automotive off-battery capability (對比A generic LDO)
設計說明
For a 40V input to 3.3V output at 300mA, the power dissipation is approximately 11W, which exceeds the HTSSOP-14 package's thermal capability without a heatsink. For such operating points, a thermal design evaluation is critical. Use a large copper pour under the exposed pad and consider reducing the input voltage with a pre-regulator to lower dissipation.
Place input and output capacitors as close to the IN and OUT pins as possible. Use a 1µF to 10µF ceramic capacitor on the input and a 1µF to 10µF ceramic capacitor on the output with low ESR, as specified in the datasheet. The exposed pad should be soldered to the ground plane for improved thermal performance.
Do not connect the watchdog output (WDO) to a high-impedance node without proper pull-up. The WDO is an open-drain output and requires an external pull-up resistor. Ensure the watchdog input (WDI) is toggled by the MCU within the programmed window to avoid false resets. Verify the enable threshold to prevent accidental shutdown during power sequencing.
合規資訊
RoHS compliant and lead-free per digchips data. AEC-Q100 qualified per TI product page. REACH, halogen-free, and conflict minerals status not provided, so set to unknown.
