LM5137F-Q1
- AEC-Q100 qualified for automotive applications:
- Device temperature grade 1: –40°C to 125°C ambient operating temperature
- Functional Safety-Compliant targeted
- Developed for functional safety applications
- Three orderable part numbers for Capable, ASIL B, and ASIL D options
- Documentation available to aid ISO 26262 system design up to ASIL D will be available upon production release
- Systematic capability up to ASIL D targeted
- Hardware integrity up to ASIL D targeted
- Developed for functional safety applications
- Versatile dual synchronous buck DC/DC controller
- 1% accurate, fixed 3.3V, 5V, 12V, or adjustable outputs from 0.8V to 60V
- Current monitor output for each channel
- Charge-pump gate drivers for 100% duty cycle
- No-load sleep current of 12.7µA (typical)
- Internal hiccup-mode overcurrent protection
- Two interleaved synchronous buck channels
- Dual channel or single-output multiphase
- Stackable up to four phases
- Designed for ultra-low EMI requirements
- Dual Random Spread Spectrum (DRSS)
- Switching frequency from 100kHz to 2.5MHz
- VQFN-36 package with wettable flanks
- Create a custom design using the LM5137F-Q1 with WEBENCH Power Designer
The LM5137F-Q1 is an 80V dual-channel buck controller offered frrom a family with three options for functional safety: Capable, ASIL B, or ASIL D. The device uses an interleaved, stackable, peak current-mode architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for high output current. A high-side switch minimum on-time of 15ns facilitates large step-down ratios, enabling the direct conversion from 12V, 24V or 48V automotive inputs to low-voltage rails for reduced system design cost and complexity. The LM5137F-Q1 continues operating during input voltage dips as low as 4V, at 100% duty cycle if needed.
Several features are included to simplify compliance with CISPR 25 and automotive EMI requirements. Adaptively timed, high-current MOSFET gate drivers minimize body diode conduction during switching transitions, reducing switching losses and improving thermal and EMI performance at high input voltage and high switching frequency. To reduce input capacitor ripple current and EMI filter size, 180° interleaved operation is provided for two outputs. A 90° out-of-phase clock output works well for cascaded, multi-channel or multiphase power stages. Resistor-adjustable switching frequency as high as 2.2MHz can be synchronized to an external clock source up to 2.5MHz to eliminate beat frequencies in noise-sensitive applications.
The 12.7µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered automotive systems. Additional features of the LM5137F-Q1 include 150°C maximum junction temperature operation, user-selectable PFM mode for lower current consumption at light-load conditions, configurable soft-start functions, open-drain PG and FAULT flags for fault reporting and output monitoring, independent enable inputs, monotonic start-up into prebiased loads, integrated VCC bias supply regulator powered from VIN or BIAS1/VOUT1, hiccup-mode overload protection, and thermal shutdown protection with automatic recovery. Current is sensed using the inductor DCR for highest efficiency or an optional shunt resistor for high accuracy.
The LM5137F-Q1 controller is qualified to AEC-Q100 grade 1 for automotive applications and comes in a 6mm × 6mm thermally-enhanced, 36-pin VQFN package with additional pin clearance for increased reliability and wettable flank pins to facilitate optical inspection during manufacturing. The wide input voltage range, low quiescent current consumption, high-temperature operation, cycle-by-cycle current limit, low EMI signature, and small design size provide an excellent point-of-load regulator solution for functional safety (FuSa) applications requiring enhanced robustness and durability.
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技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | LM5137F-Q1 Automotive, 4V to 80V , 100% Duty Cycle Capable, Dual-Channel Synchronous Buck Controller Family for Functional Safety Applications datasheet | PDF | HTML | 2024年 9月 19日 |
Technical article | 以 TI 功能安全合規降壓穩壓器為新一代 ADAS 處理器供電 | PDF | HTML | 2024年 11月 25日 | |
Technical article | 在汽車無電池降壓前置穩壓器設計中實現功能安全合規性 | PDF | HTML | 2024年 11月 19日 | |
EVM User's guide | LM25137-Q1 Evaluation Module User's Guide (Rev. A) | PDF | HTML | 2024年 8月 22日 | |
Certificate | LM25137F-Q1-EVM5D3 EU Declaration of Conformity (DoC) | 2024年 7月 23日 | ||
E-book | An Engineer’s Guide to Low EMI in DC/DC Regulators | 2021年 4月 21日 | ||
White paper | An overview of radiated EMI specifications for power supplies | 2018年 6月 5日 | ||
White paper | An overview of conducted EMI specifications for power supplies | 2018年 2月 1日 |
設計與開發
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LM25137F-Q1-EVM5D3 — LM25137F-Q1 評估模組
LM5137-LM25137-DESIGN-CALC — LM5137/-Q1 和 LM25137/-Q1 控制器快速入門設計工具
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
VQFN (RHA) | 36 | 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