The LM5137F-Q1 is an 80V dual-channel buck
controller offered from 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.
Features:
- 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 are
available upon production release
- Systematic capability up to ASIL D targeted
- Hardware integrity up to ASIL D targeted
- 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