TPS7B4256-Q1
- AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, T A
- Junction temperature: –40°C to +150°C, T J
- Wide input voltage range:
- Absolute maximum range: –40 V to +45 V
- Operating range: 3 V to 40 V
- Output voltage:
- Wide operating range: 2 V to 40 V
- Output voltage flexibility: V OUT can be scaled to values that are higher or lower than the reference using external resistors in a voltage divider configuration
- Maximum output current: 70 mA
- Very tight output-tracking tolerance: 6 mV (max)
- Low dropout voltage: 225 mV (max) at 70 mA
- Combined enable and reference functionalities
- Low quiescent current at light load: 60 µA
- Stable over a wide range of ceramic output capacitor values:
- C OUT range: 1 µF to 100 µF
- ESR range: 1 mΩ to 2 Ω
- Integrated protection features:
- Reverse current protection
- Reverse polarity protection
- Overtemperature protection
- Protection against output short circuit to ground and supply
- Available in the following low thermal resistance 8-pin packages :
- HSOIC (DDA), R θJA = 53.3°C/W
- SOIC (D), R θJA = 101°C/W
The TPS7B4256-Q1 is a monolithic, integrated, low-dropout (LDO) voltage tracker. The device is available in 8-pin SOIC and HSOIC packages. The TPS7B4256-Q1 is designed to provide power supply to off-board sensors in an automotive environment. Because the risk of failure in cables that deliver off-board power is high, the device comes with integrated protection features against fault conditions such as short to battery, reverse polarity, output short to ground (current limit), and overtemperature (thermal shutdown). The device incorporates a back-to-back PMOS topology that eliminates the need for an external diode that is otherwise required to help protect against fault conditions that result in flow of reverse current. The device is designed to handle a 45-V (absolute maximum) input voltage and survive the automotive load dump transient conditions.
A reference voltage applied at the adjustable input pin (ADJ/EN) is tracked with a very tight 6 mV (max) tolerance at the FB pin across temperature. This tracking enables the TPS7B4256-Q1 to deliver a power-supply voltage with high precision for loads up to 70 mA. The reference voltage can be directly connected to the ADJ/EN pin or scaled down to lower values with the help of an external resistor divider at the ADJ/EN pin to a minimum of 2 V. The output voltage can be made equal to the voltage at the ADJ/EN pin (± the tracking tolerance) by tying the FB pin directly to the OUT pin or scaled to higher values with the help of a resistive voltage divider between the FB and the OUT pin.
The TPS7B4256-Q1 provides an effective buffer to the reference voltage of an ADC and securely transmits this voltage (or a scaled version thereof) over a long cable to power off-board sensors. If the sensor is ratiometric and the output is sampled by the ADC, the described features of the TPS7B4256-Q1 help significantly improve the reliability and accuracy of the sensor measurements.
By setting the ADJ/EN input pin low, the TPS7B4256-Q1 switches to standby mode and reduces the quiescent current consumption of the LDO to less than 3.5 µA.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TPS7B4256-Q1Automotive, 70-mA, 40-V, Voltage-Tracking LDO With 6-mV Tracking Tolerance datasheet (Rev. A) | PDF | HTML | 2023年 11月 27日 |
設計與開發
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TRKRLDOEVM-119 — 通用型低壓差 (LDO) 追蹤穩壓器評估模組
通用低壓差 (LDO) 追蹤器穩壓器評估模組 (EVM)，可用於評估 TI 搭載外部元件墊的追蹤器 LDO 裝置的運作及性能，以及最適合超低寄生量測的板載負載瞬態電路。此 EVM 適用於採用 DDA 及 D 封裝的追蹤器 LDO。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。