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LM63635C-Q1

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Automotive 3.5V-to-36V 3.25A step-down voltage converter

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Data sheet

LM63635C-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Topology Buck Iout (max) (A) 3.25 Vin (max) (V) 32 Vin (min) (V) 3.5 Vout (max) (V) 20 Vout (min) (V) 1 Features Enable, Fixed Output, Fixed soft start, Forced PWM, Frequency synchronization, Light-load efficiency, Power good, Spread Spectrum, Synchronous rectification, UVLO fixed EMI features Spread Spectrum Control mode current mode Switching frequency (min) (kHz) 250 Switching frequency (max) (kHz) 2200 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 24 Duty cycle (max) (%) 99 Type Converter
Rating Automotive Topology Buck Iout (max) (A) 3.25 Vin (max) (V) 32 Vin (min) (V) 3.5 Vout (max) (V) 20 Vout (min) (V) 1 Features Enable, Fixed Output, Fixed soft start, Forced PWM, Frequency synchronization, Light-load efficiency, Power good, Spread Spectrum, Synchronous rectification, UVLO fixed EMI features Spread Spectrum Control mode current mode Switching frequency (min) (kHz) 250 Switching frequency (max) (kHz) 2200 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 24 Duty cycle (max) (%) 99 Type Converter
WSON (DRR) 12 9 mm² 3 x 3
  • AEC-Q100-Qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Supports automotive system requirements
    • Input voltage range: 3.5V to 36V
    • Short minimum on-time of 50ns
    • Good EMI performance
    • Psuedo-random spread spectrum
    • Compatible with CISPR 25
    • Low operating quiescent current of 23µA
    • Junction temperature range –40°C to +150°C
  • High design flexibility with minimal external components
    • Fixed VOUT at 3.3V or 5V
    • Fixed switching frequency at 400kHz or 2.1MHz
    • Output current up to 3.25A
  • Small design size
    • As small as: 14mm × 14mm for 3.25A, 2.2MHz with WSON package
    • Highly integrated design with low external component count
  • AEC-Q100-Qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Supports automotive system requirements
    • Input voltage range: 3.5V to 36V
    • Short minimum on-time of 50ns
    • Good EMI performance
    • Psuedo-random spread spectrum
    • Compatible with CISPR 25
    • Low operating quiescent current of 23µA
    • Junction temperature range –40°C to +150°C
  • High design flexibility with minimal external components
    • Fixed VOUT at 3.3V or 5V
    • Fixed switching frequency at 400kHz or 2.1MHz
    • Output current up to 3.25A
  • Small design size
    • As small as: 14mm × 14mm for 3.25A, 2.2MHz with WSON package
    • Highly integrated design with low external component count

The LM63635C-Q1 regulator is an easy-to-use, synchronous, step-down, DC/DC converter designed for rugged automotive applications. The LM63635C-Q1 can drive up to 3.25A of load current from an input of up to 36V. The converter has high light load efficiency and output accuracy in a small design size. Features such as a RESET flag and precision enable provide both flexible and easy-to-use solutions for a wide range of applications. Automatic frequency foldback at light load improves efficiency while maintaining tight load regulation. Integration eliminates many external components and provides a pinout designed for simple PCB layout. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. The LM63635C-Q1 is available in a WSON 12-pin power package.

The LM63635C-Q1 regulator is an easy-to-use, synchronous, step-down, DC/DC converter designed for rugged automotive applications. The LM63635C-Q1 can drive up to 3.25A of load current from an input of up to 36V. The converter has high light load efficiency and output accuracy in a small design size. Features such as a RESET flag and precision enable provide both flexible and easy-to-use solutions for a wide range of applications. Automatic frequency foldback at light load improves efficiency while maintaining tight load regulation. Integration eliminates many external components and provides a pinout designed for simple PCB layout. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. The LM63635C-Q1 is available in a WSON 12-pin power package.
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Type Title Date
* Data sheet LM63635C-Q1 3.5V to 36V, 3.25A, Automotive Step-Down Voltage Converter datasheet (Rev. A) PDF | HTML 16 May 2025
Functional safety information LM63635C-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 18 Jan 2024

Design & development

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Evaluation board

LM63635DNEVM — LM63635DN evaluation module for 3.5-V to 36-V, 3.25-A step-down voltage converter with spread spectr

LM63635DNEVM evaluation module (EVM) helps designers evaluate the operation and performance of the LM636x5CAQDRRQ1 buck regulator. The LM636x5CAQDRRQ1 is a family of easy-to-use synchronous step-down DC/DC converters capable of driving up to 3.5-A of load current from an input voltage of 3.5-V to (...)
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