1 Features

• AEC-Q100 qualified for automotive applications:

– Device temperature grade 1: –40°C to 125°C

ambient operating temperature

• Functional Safety-Compliant

– 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

– Systematic capability up to ASIL D

– Hardware integrity up to ASIL D per IEC62380

• Versatile dual synchronous buck DC/DC controller

– Wide input voltage range of 4V to 42V

– 1% accurate, fixed 3.3V, 5V, 12V, or adjustable

outputs from 0.8V to 36V

– Current monitor output for each channel

– Charge-pump gate drivers for 100% duty cycle

– No-load sleep current (non- switching) of 1.8μA

(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 2.64MHz

• VQFN-36 package with wettable flanks

• Create a custom design using the LM25137F-Q1

with WEBENCH® Power Designer

2 Applications

• Automotive electronic systems

• Infotainment systems, instrument clusters, ADAS

• Body electronics and lighting

3 Description

The LM25137F-Q1 is a 42V, 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 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 22ns facilitates large step-down ratios,

enabling the direct conversion from 12V and 24V

automotive inputs to low-voltage rails for reduced

system cost and complexity. The LM25137F-Q1

continues to operate during input voltage dips as low

as 4V, at 100% duty cycle if needed.