Texas Instruments LM5137F/LM5137F-Q1 Synchronous Buck Controllers
Texas Instruments LM5137F/LM5137F-Q1 Synchronous Buck Controllers are 100% duty-cycle capable and ASIL B or ASIL D functional safety-compliant. This 80V dual-channel buck controller utilizes an interleaved, stackable, peak current-mode architecture for easy loop compensation and fast transient response. This architecture also offers excellent load and line regulation and accurate current sharing with paralleled phases for high output current. The LM5137F-Q1 series is AEC-Q100 grade 1 qualified for automotive applications and includes several features that simplify compliance with CISPR 25 and automotive EMI requirements. The 6mm x 6mm thermally enhanced, 36-pin VQFN package provides additional pin clearance for extra reliability and wettable flank pins to expedite optical inspection during manufacturing.
Texas Instruments LM5137F/LM5137F-Q1 Synchronous Buck Controllers are designed for applications requiring enhanced robustness and durability. Ideal applications include automotive electronic systems, advanced driver assistance systems (ADAS), infotainment systems, instrument clusters, and high-voltage battery-operated systems.
Features
- Functional safety-compliant, targeted, and 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
- 12.7µA no-load sleep current (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
- 6mm x 6mm thermally enhanced, 36-pin VQFN package with wettable flank pins and additional pin clearance for increased reliability
Applications
- Communications systems (wireless infrastructure)
- Industrial (factory automation and control, robotics)
- Enterprise systems (high-performance computing)
- Automotive electronic systems (LM5137F-Q1)
- Infotainment systems (LM5137F-Q1)
- Instrument clusters (LM5137F-Q1)
- ADAS (LM5137F-Q1)
- High-voltage battery-operated systems (LM5137F-Q1)
Datasheets
Simplified Schematic
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