Texas Instruments LM686x5-Q1 Buck DC/DC Converters
Texas Instruments LM686x5-Q1 Buck DC/DC Converters are designed for high efficiency, high-power density, and ultra-low electromagnetic interference (EMI). These DC/DC converters operate with an input voltage range of 3V to 65V and a temperature range of -40°C to 125°C. temperature range. The LM686x5-Q1 converters are automotive devices with Low-EMI ZEN 1 Switcher Technology Optimized for safety-relevant applications. The LM686x5-Q1 devices are available with pin-selectable fixed output voltages of 3.3V and 5V, or in an adjustable configuration. These LM686x5-Q1 devices are AEC-Q100 qualified for automotive applications. The LM686x5-Q1 converters are offered in a 3.6mm x 2.6mm, thermally enhanced, 20-pin eQFN package. These devices are suitable for Advanced Driver Assistance Systems (ADAS), automotive infotainment and cluster, hybrid, electric, and powertrain systems.
Features
- AEC-Q100 qualified for automotive applications:
- -40°C to 125°C, TA temperature grade 1
- Functional safety-compliant:
- Documentation available to aid ISO 26262 system 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
- 3V to 65V wide input voltage range and meets LV148 / ISO21780 requirements
- ZEN 1 switcher technology:
- Facilitates CISPR 25 class 5 compliance
- ±5% dual-random spread spectrum
- Enhanced HotRod™ QFN package
- 300kHz to 2.2MHz switching frequency range
- Pin-configurable AUTO or FPWM operation
- Internal compensation, current limit, and Thermal Shutdown (TSD)
- 40ns (maximum) with low minimum on time:
- Enables 36VIN to 3.3VOUT at 2.2MHz
- High-efficiency power conversion at all loads:
- >94% peak efficiency at 24VIN, 5VOUT, 400kHz
- 2.5µA switching input current at no load
- High power density:
- Compact 3.6mm x 2.6mm, 20-pin eQFN package with wettable flank
- Pin compatible with 36V 4/6/8A LM654x0-Q1
- ϴJA = 24.0°C/W (LM65645-Q1EVM)
- Create a custom design using the LM686x5-Q1 with the WEBENCH® Power Designer
Applications
- Advanced Driver Assistance Systems (ADAS)
- Automotive infotainment and cluster
- Hybrid, electric, and powertrain systems
Schematic
