LMQ62440-Q1
- AEC-Q100 qualified for automotive
applications
- Temperature grade 1: –40°C to +150°C, TJ
- Functional Safety-Capable
- Optimized for ultra-low EMI requirements
- Meets CISPR25 class 5 standard
- Hotrod™ package minimizes switch node ringing
- Internal bypass capacitors reduce EMI
- Parallel input path minimizes parasitic inductance
- Spread spectrum reduces peak emissions
- Adjustable switch node rise time
- Designed for rugged Automotive
applications
- Supports 42-V load dump
- 0.4-V dropout with 4-A load (typical)
- High efficiency power conversion at all loads
- 7-µA no load current at 13.5 VIN, 3.3 VOUT
- 90% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUT
- Low MOSFET ON resistance
- RDS_ON_HS = 41 mΩ (typical)
- RDS_ON_LS = 21 mΩ (typical)
- External bias option for improved efficiency
- Pin compatible with:
- LM62440-Q1 (36 V, 4 A)
The LMQ62440-Q1 is a high-performance, DC-DC synchronous buck converter with integrated bypass capacitors. With integrated high-side and low-side MOSFETs, up to 4 A of output current is delivered over a wide input range of 3.0 V to 36 V; 42-V tolerance supports load dump for durations of 400 ms. The device implements soft recovery from dropout eliminating overshoot on the output.
The device is specifically designed for minimal EMI. The device incorporates pseudo-random spread spectrum, integrated bypass capacitors, adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.
Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, ensures exceptional efficiency across the entire load range.
The device is available in a 14-pin VQFN-HR package with wettable flanks. Electrical characteristics are specified over a junction temperature range of –40°C to +150°C. Find additional resources in the Related Documentation.
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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 | LMQ62440-Q1 Automotive 3-V to 36-V, Low EMI Synchronous Step-Down Converter datasheet (Rev. A) | 2020/9/24 | |||
| 白皮書 | Time-Saving and Cost-Effective Innovations for EMI Reduction (Rev. A) | PDF | HTML | 2023/11/28 | |||
| 功能安全資訊 | LMQ6x4x0-Q1 Functional Safety, FIT Rate, FMD, and Pin FMA (Rev. A) | PDF | HTML | 2020/9/9 | |||
| 證書 | LMQ62440EVM-2MHz EU Declaration of Conformity (DoC) | 2020/9/1 | ||||
| 功能安全資訊 | LMQ62440-Q1 Functional Safety, FIT Rate, and Failure Mode Distribution | 2020/4/1 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
LMQ62440EVM — 36-V、低 EMI 4-A、5-V 同步、2.1-MHz、降壓轉換器評估模組
SNVR489 — LMQ62440EVM-2MHz Design Files
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN-HR (RJR) | 14 | 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。