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LM63635-Q1
Automotive, 3.5V to 36V, 3.25A step-down voltage converter with spread spectrum
Data sheet
LM63635-Q1
- 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 Electromagnetic Interference (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
- Pin selectable VOUT: 3.3V, 5V, adjustable 1V to 20V
- Output current: 3.25A
- Pin selectable frequency: 400kHz, 2.1MHz, adjustable 250kHz to 2200kHz
- Pin selectable FPWM, AUTO, sync modes
- Pin compatible with: LM63610-Q1, LM63615-Q1, LM63625-Q1
- TSSOP: Thermally-enhanced package
- Small design size
- As small as 14mm × 14mm for 3.25A, 2.2MHz with WSON package
- Highly integrated design
- Low component count
The LM63635-Q1 regulator is an easy-to-use, synchronous, step-down DC/DC converter designed for rugged automotive applications. The LM63635-Q1 can drive up to 3.25A of load current from an input of up to 36V for WSON package and 32V for HTSSOP package. 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 LM63635-Q1 is available in both the HTSSOP 16-pin power package, with PowerPAD™ integrated circuit package, and the WSON 12-pin power package.
Technical documentation
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The AWR2544LOPEVM is an easy-to-use evaluation board for the AWR254x mmWave sensing device, with direct connectivity to the DCA1000EVM.This EVM kit contains everything needed to start developing software for the on-chip ARM Cortex-R5F controller, and hardware accelerator (HWA 1.5). Also included (...)
User guide: PDF
Evaluation board
AWR2944EVM — AWR2944 evaluation module for automotive, second-generation 76-GHz to 81-GHz high-performance SoC
The AWR2944 evaluation module (EVM) is an easy-to-use platform for evaluating the AWR2944 mmWave system-on-chip (SoC) radar sensor, which has direct connectivity to the DCA1000EVM (sold separately).
The AWR2944EVM kit contains everything required to start developing software for the on-chip C66x (...)
Evaluation board
AWR2944PEVM — AWR2944PEVM evaluation module for the AWR2944P radar sensor
The AWR2944PEVM is evaluation board for the AWR2944P mmWave sensing device with direct connectivity to the DCA1000 EVM.This EVM kit contains everything needed to start developing software for the on-chip C66x DSP, ARM® Cortex®-R5F controller, and hardware accelerator (HWA 2.1). Also included is (...)
Evaluation board
LM63625EVM — 3.5-V to 36-V, 2.5-A synchronous step-down converter evaluation module
The LM63625 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM63625 synchronous step-down converter.
User guide: PDF
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 (...)
Evaluation board
LM63635EVM — 3.5-A synchronous step-down converter evaluation module
The LM63635 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM63635 synchronous step-down converter.
User guide: PDF
Evaluation board
LM63635QDRREVM — Evaluation module for 3.5-V to 36-V, 3.25-A step-down voltage converter with spread spectrum
The LM63635QDRREVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM63635-Q1 synchronous step-down converter.
Reference designs
PMP30930 — EMI-optimized buck reference design
This reference design consists of three separable boards optimized for low EMI.
The three boards are labeled
- PMP30930 Part A (using LM63635-Q1, PW package)
- PMP30930 Part B (using LM63635-Q1, DR package)
- PMP30930 Part C (Using LM61460-Q1)
Test report: PDF
Reference designs
PMP21939 — Four-output synchronous buck reference design for automotive telematics control units
This reference design uses an LM63635-Q1 synchronous buck converter to output either a 3.3-V or 5-V rail. The bus converter switches at 2.1 MHz, and the load converters (TPS62810-Q1) switch at 2.2 MHz. The system is designed for telematics control unit power. Easily configurable jumpers allow (...)
Reference designs
PMP30670 — Automotive wide VIN front-end reference design for digital cockpit processing units
This reference design shows a power tree for automotive digital cockpit applications. The LM74700-Q1 provides low-loss reverse polarity protection to the system followed by an input filter. The LM5143-Q1 dual-synchronous buck converter provides a 3.3-V rail, which can support up to 15 A for a (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
| WSON (DRR) | 12 | Ultra Librarian |
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