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Product Overview
The TPS70851PWP from Texas Instruments is a dual-output low-dropout (LDO) voltage regulator designed for applications requiring two independent regulated voltages. Housed in a 20-pin HTSSOP (PowerPAD) package, it delivers a fixed 3.3V output at 1A and a fixed 1.8V output at 2A, with high accuracy and low dropout voltage. The device integrates thermal shutdown, overcurrent protection, and a power-good indicator, making it ideal for powering mixed-signal systems in industrial, telecom, and automotive environments.
Detailed Technical Specifications
| Parameter |
Value |
| Output Voltage 1 |
3.3V (fixed) |
| Output Voltage 2 |
1.8V (fixed) |
| Output Current 1 |
1A |
| Output Current 2 |
2A |
| Dropout Voltage (Vout1) |
350mV at 1A |
| Dropout Voltage (Vout2) |
500mV at 2A |
| Line Regulation |
0.05% typ |
| Load Regulation |
0.1% typ |
| Quiescent Current |
125µA per channel |
| PSRR |
60dB at 1kHz |
| Operating Temperature |
-40°C to +125°C |
| Package |
20-HTSSOP (PowerPAD) |
Key Features
- Dual independent LDO outputs: 3.3V/1A and 1.8V/2A
- Low dropout voltage: 350mV (3.3V) and 500mV (1.8V) at full load
- High accuracy: ±2% over line, load, and temperature
- Low quiescent current: 125µA per channel
- Power-good (PG) output for each regulator
- Thermal shutdown and overcurrent protection
- Stable with ceramic output capacitors (≥2.2µF)
- Enable pins for independent shutdown
- PowerPAD package for enhanced thermal dissipation
Target Applications
- 5G base station power management (e.g., powering FPGA cores and I/O)
- Automotive infotainment and dashboard systems (e.g., supplying 3.3V for MCU and 1.8V for DDR memory)
- Industrial control systems (e.g., PLC modules requiring dual rails)
- Telecom equipment (e.g., line cards with mixed analog/digital supplies)
- Medical devices (e.g., portable monitors needing low-noise dual outputs)
Global Supply Chain & Wholesale Solutions
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TPS70851PWP. Our core advantages include:
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Shenzhen with support for HK bank transfers and multi-currency.
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testing samples and urgent shortage components.
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with full quality assurance and traceability.
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be authentic with strict quality control.
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environmental and safety standards.
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Original Factory Packaging: We maintain original factory packaging
and seals to ensure ESD protection and physical integrity.
產品概述
TPS70851PWP 是德州儀器(TI)推出的雙路低壓差(LDO)穩壓器,專為需要兩路獨立穩壓電壓的應用而設計。採用 20 引腳 HTSSOP(PowerPAD)封裝,提供固定的 3.3V/1A 和 1.8V/2A 輸出,具有高精度和低壓差特性。器件集成熱關斷、過流保護和電源正常指示功能,非常適合為工業、電信和汽車環境中的混合信號系統供電。
詳細技術參數
| 參數 |
數值 |
| 輸出電壓 1 |
3.3V(固定) |
| 輸出電壓 2 |
1.8V(固定) |
| 輸出電流 1 |
1A |
| 輸出電流 2 |
2A |
| 壓差(Vout1) |
350mV(1A 時) |
| 壓差(Vout2) |
500mV(2A 時) |
| 線性調整率 |
典型 0.05% |
| 負載調整率 |
典型 0.1% |
| 靜態電流 |
每通道 125µA |
| 電源抑制比 |
60dB(1kHz) |
| 工作溫度 |
-40°C 至 +125°C |
| 封裝 |
20-HTSSOP(PowerPAD) |
核心特性
- 雙路獨立 LDO 輸出:3.3V/1A 和 1.8V/2A
- 低壓差:3.3V 輸出 350mV,1.8V 輸出 500mV(滿載)
- 高精度:在線路、負載和溫度範圍內 ±2%
- 低靜態電流:每通道 125µA
- 每路穩壓器帶電源正常(PG)輸出
- 熱關斷和過流保護
- 可使用陶瓷輸出電容器(≥2.2µF)穩定工作
- 獨立關斷使能引腳
- PowerPAD 封裝增強散熱性能
典型應用場景
- 5G 基站電源管理(例如為 FPGA 內核和 I/O 供電)
- 汽車信息娛樂和儀表板系統(例如為 MCU 提供 3.3V,為 DDR 內存提供 1.8V)
- 工業控制系統(例如需要雙路電源的 PLC 模塊)
- 電信設備(例如需要混合模擬/數字電源的線路卡)
- 醫療設備(例如需要低噪聲雙路輸出的便攜式監護儀)
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