3.5-V to 36-V, 1.0-A step-down voltage converter with spread spectrum


Product details


Vin (Min) (V) 3.5 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 20 Iout (Max) (A) 1 Iq (Typ) (uA) 23 Switching frequency (Min) (kHz) 250 Switching frequency (Max) (kHz) 2200 Features Enable, Fixed Output, Forced PWM, Frequency Synchronization, Light Load Efficiency, Power Good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 16 32 mm² 5 x 6.4 WSON (DRR) 12 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)


  • 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: 3.5 V to 36 V
    • Short minimum on-time of 50 ns
    • Good performance Pseudo-random spread spectrum Compatible with CISPR 25
    • Low operating quiescent current of 23 µA
    • Junction temperature range –40°C to +150°C
  • High design flexibility
    • Pin selectable VOUT: 3.3 V, 5 V, adjustable 1 V to 20 V
    • Pin compatible with LM63615/LM63625/LM63635 (1.5 A, or 2.5 A, and 3.25 A)
    • Pin selectable frequency: 400 kHz, 2.1 MHz, adjustable 250 kHz to 2200 kHz
    • Pin selectable FPWM, AUTO, sync modes
    • TSSOP: Thermally-enhanced package
    • WSON: For space-constrained applications
  • Small solution size
    • Highly integrated solution
    • Low component count
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The LM63610-Q1 regulators are a family of easy-to-use, synchronous, step-down DC/DC converters designed for rugged automotive applications. The LM63610-Q1 can drive up to 1 A of load current from an input of up to 36 V. The converter has high light load efficiency and output accuracy in a small solution 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 LM63610-Q1 is available in both the HTSSOP 16-pin power package, with PowerPAD™, and the WSON 12-pin power package. Please contact Texas Instruments for availability of the WSON package.

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Technical documentation

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Type Title Date
* Data sheet LM63610-Q1 3.5-V to 36-V, 1-A, Automotive Step-down Voltage Converter datasheet (Rev. A) Jul. 27, 2021
Functional safety information LM636xx-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. C) Jun. 10, 2021
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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Hardware development

document-generic User guide
The LM63615QDRREVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM63625-Q1 synchronous step-down converter.
  • Integrated synchronous rectification
  • Low operating quiescent current
  • High efficiency at light loads
  • Low minimum on-time

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CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 16 View options
WSON (DRR) 12 View options

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