LM68645-Q1
Automotive 3-V to 65-V, 4.5A synchronous step-down converter optimized for power density and low EMI
LM68645-Q1
- AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, TA
- Functional Safety-Compliant
- Developed for functional safety applications
- Documentation to aid with ISO26262 compliant designs planned
- Systematic capability up to ASIL-D
- Hardware capability up to ASIL-C
- Analog built-in-self-test at start-up
- Redundant and fast (0.35µs) VOUT monitor
- Feedback path failure detection
- Redundant temperature sensor
- Excellent pin FMEA and pin spacing
- Wide input voltage range: 3V to 70V
- Designed for low EMI requirements
- Facilitates CISPR 25 class 5 compliance
- ±5% dual-random spread spectrum
- Enhanced HotRod™ QFN package with symmetrical pinout
- Switching frequency from 300kHz to 2.2MHz
- Pin-configurable 400kHz and 2.2MHz
- Pin-configurable AUTO or FPWM operation
- Low minimum on time: 40ns (maximum)
- Enables 36V to 3.3V conversion at 2.2MHz
- High-efficiency power conversion at all loads
- > 94% peak efficiency at 24VIN, 5VOUT, 400kHz
- 2.5µA PFM no-load input current
- High power density
- Create a custom design using the with the WEBENCH Power Designer
The LM686x5-Q1 are a family of automotive buck converters designed for high efficiency, high power density, and ultra-low electromagnetic interference (EMI). The converters operate over a wide input voltage range of 3V to 70V (75V tolerant) reducing the need for external input surge protection. The LM686x5-Q1 comes with pin selectable fixed output voltages of 3.3V and 5V or in adjustable configuration. The low EMI operation is enabled with minimized loop inductance and optimized switch node slew rate. The current-mode control architecture with a 30ns typical minimum on-time allows high conversion ratios at high frequencies coupled with a fast transient response and excellent load and line regulation.
The LM686x5-Q1 buck converters are specifically intended for functional safety relevant applications. An array of safety features including ABIST at start-up, redundant and fast VOUT monitoring, feedback path failure detection, redundant temperature sensor, thermal shutdown, and current limiting significantly reduce the residual failure-in-time (FIT).
Technische Dokumentation
Typ | Titel | Datum | ||
---|---|---|---|---|
* | Data sheet | LM686x5-Q1 High Performance, Functional Safety Power Converter, 3V to 70V , Pin-Compatible, 2.5A/3.5A/4.5A, Automotive , Low EMI, Synchronous Buck Converter datasheet | PDF | HTML | 21 Okt 2024 |
EVM User's guide | LM68645-Q1 Evaluation Module User's Guide | PDF | HTML | 21 Okt 2024 | |
Certificate | LM68645EVM EU Declaration of Conformity (DoC) | 04 Okt 2024 |
Design und Entwicklung
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LM68645EVM — LM68645-Q1 evaluation module
The LM68645-Q1 evaluation module (EVM) helps designers evaluate the operation and performance of the LM68645 family of wide input voltage buck converters. The LM68645EVM is configured to deliver a 5V output to a load requiring 4.5A or less. The LM68645EVM can be used in many different (...)
Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
---|---|---|
WQFN-FCRLF (RZT) | 20 | Ultra Librarian |
Bestellen & Qualität
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- Materialinhalt
- Qualifikationszusammenfassung
- Kontinuierliches Zuverlässigkeitsmonitoring
- Werksstandort
- Montagestandort
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