1 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 will be 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

? VQFN-36 package with wettable flanks

? Create a custom design using the LM5137F-Q1

with WEBENCH? Power Designer

2 Applications

? Automotive electronic systems

? Infotainment systems, instrument clusters, ADAS

? High-voltage battery-operated systems

3 Description

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 currentmode

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.