LM5126A-Q1
- AEC-Q100 qualified for automotive
applications
- Temperature grade 1: TA = –40°C to +125°C
- Functional Safety-Capable
- Input voltage 4.5V to 42V
- Minimum 2.5V for V(BIAS) ≥4.5V or VOUT ≥6V
- Output voltage 6V to 60V
- 2% accuracy, internal feedback resistors
- Bypass operation for VI > VOUT
- Dynamic output voltage
tracking
- Digital PWM tracking (DTRK)
- Analog tracking (ATRK)
- Overvoltage protection (64V, 50V, 35V, 28.5V)
- Low shutdown IQ of 2µA
- Low operating IQ of 1mA
- 3-phase operation with LM5125A-Q1
- Switching frequency from 100kHz
to 2.2MHz
- Synchronization to external clock (SYNCIN)
- Dynamically selectable switching modes (FPWM, diode emulation)
- Spread spectrum (DRSS)
- Selectable dead time (14ns to 200ns)
- Current sense resistor or DCR sensing
- Average inductor current monitor
- Average input current limit
- Programmable current limit
- Selectable delay time
- Power good indicator
- Programmable VI undervoltage lockout (UVLO)
- Lead-less QFN-32 packable with wettable flanks
The LM5126A-Q1 is a synchronous boost controller. The device provides a regulated output voltage for lower or equal input voltage also supporting VI to VOUT bypass mode to save power. The device can be stacked in combination with LM5125A-Q1 for 3-phase operation.
Dynamically program VOUT using the analog or digital ATRK/DTRK function. VI is supported down to 2.5V after startup as the internal VCC supply is automatically switched from VBIAS to VOUT for VBIAS < 4.5V. The fixed switching frequency is set between 100kHz and 2.2MHz through a resistor on the RT-pin or the SYNCIN clock. The switching modes FPWM or diode emulation can be changed during operation.
The implemented protections peak current limit, average input current limit, average inductor current monitor, overvoltage and undervoltage protection, and the thermal shutdown protect the device and the application.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM5126A-Q1, Wide-VIN, Single-Phase, Boost Controller with VOUT Tracking datasheet | PDF | HTML | 2025/11/26 | ||
| 應用說明 | Multiphase Operation of LM5125A-Q1 | PDF | HTML | 2026/7/9 | |||
| 功能安全資訊 | LM5126A-Q1 and LM51261A-Q1 Functional Safety FIT Rate, FMD and Pin FMA | PDF | HTML | 2025/10/24 |
設計與開發
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LM5126AEVM-BST — LM5126A 評估模組
LM5126A-BOOST-CALC — LM5126A Boost Controller Quick Start Calculator
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RHB) | 32 | Ultra Librarian |
訂購與品質
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。