Product
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LM63635C-Q1
  • LM63635C-Q1
  • LM63635C-Q1

LM63635C-Q1

ACTIVE

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

Texas Instruments LM63635C-Q1 Product Info

1 April 2026 4

Parameters

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

Operating temperature range (°C)

-40 to 150

Iq (typ) (A)

0.000024

Duty cycle (max) (%)

99

TI functional safety category

Functional Safety-Capable

Package

WSON (DRR)-12-9 mm² 3 x 3

Features

  • 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

Description

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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