LMR33630

HSOIC (DDA)

8

19 mm² 4.9 x 3.9

VQFN-HR (RNX)

12

6 mm² 3 x 2

Functional Safety-Capable
- Documentation available to aid functional safety system design
Configured for rugged industrial applications
- Input voltage range: 3.8 V to 36 V
- Output voltage range: 1 V to 24 V
- Output current: 3 A
- 75-mΩ/50-mΩ R_DS-ON power MOSFETs
- Peak-current-mode control
- Short minimum on-time of 68 ns
- Frequency: 400 kHz, 1.4 MHz, 2.1 MHz
- Junction temperature range –40°C to +125°C
- Low EMI and low switching noise
- Integrated compensation network
Low EMI and switching noise
- HotRod™ package
- Parallel input current paths
High power conversion at all loads
- Peak efficiency > 95%
- Low operating quiescent current of 25 µA
Flexible system interface
- Power-good flag and precision enable
Use TPSM53603 module for faster time to market
Create a custom design using the LMR33630 with the WEBENCH Power Designer

Functional Safety-Capable
- Documentation available to aid functional safety system design
Configured for rugged industrial applications
- Input voltage range: 3.8 V to 36 V
- Output voltage range: 1 V to 24 V
- Output current: 3 A
- 75-mΩ/50-mΩ R_DS-ON power MOSFETs
- Peak-current-mode control
- Short minimum on-time of 68 ns
- Frequency: 400 kHz, 1.4 MHz, 2.1 MHz
- Junction temperature range –40°C to +125°C
- Low EMI and low switching noise
- Integrated compensation network
Low EMI and switching noise
- HotRod™ package
- Parallel input current paths
High power conversion at all loads
- Peak efficiency > 95%
- Low operating quiescent current of 25 µA
Flexible system interface
- Power-good flag and precision enable
Use TPSM53603 module for faster time to market
Create a custom design using the LMR33630 with the WEBENCH Power Designer

The LMR33630 SIMPLE SWITCHER regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged industrial applications. The LMR33630 drives up to 3 A of load current from an input of up to 36 V. The LMR33630 provides high light load efficiency and output accuracy in a very small solution size. Features such as a power-good flag and precision enable provide both flexible and easy-to-use solutions for a wide range of applications. The LMR33630 automatically folds back frequency at light load to improve efficiency. Integration eliminates most 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 LMR33630 is available in an 8-pin HSOIC package and in a 12-pin 3 mm × 2 mm next generation VQFN package with wettable flanks. This device is also available in an AEC-Q100-qualified version.

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TPSM53603

ACTIVE

36-V, 3-A step-down power module in small 5.5 x 5 x 4-mm Enhanced HotRod™ QFN with simple footprint Save board space, simplify design, and speed time to market with an integrated-inductor power module.

Technical documentation

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	Type	Title	Date
*	Data sheet	LMR33630SIMPLE SWITCHER® 3.8-V to 36-V, 3-A Synchronous Step-down Voltage Converter datasheet (Rev. F)	24 Nov 2020
	Application note	Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A)	26 Jul 2021
	Application note	Designing a Motorized Resistive Load	21 Jul 2021
	Selection guide	Buck Converter Quick Reference Guide (Rev. B)	08 Apr 2021
	Functional safety information	LMR336x0 Functional Safety, FIT Rate, FMD and Pin FMA (Rev. A)	02 Mar 2021
	Application note	Working with Inverting Buck-Boost Converters (Rev. A)	14 May 2020
	Technical article	3 tips when designing a power stage for servo and AC drives	20 Nov 2019
	Application note	Achieving CISPR-22 EMI Standards With HotRod™ Buck Designs (Rev. A)	17 Sep 2019
	Technical article	Design a pre-tracking regulator, part 2: for a negative LDO	26 Apr 2019
	Application note	Understanding Mode Transitions for LMR33620/30 and LMR36006/15	04 Apr 2019
	Technical article	Minimize the impact of the MLCC shortage on your power application	29 Mar 2019
	Technical article	Designing a pre-tracking regulator, part 1: for a positive-output LDO	18 Feb 2019
	User guide	LMR33630EVM User's Guide (Rev. A)	01 Mar 2018
	User guide	LMR33630xRNXEVM User's Guide	22 Feb 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LMR33630ADDAEVM — LMR33630 Synchronous Step-Down Converter Evaluation Module

The LMR33630ADDAEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR33630 synchronous step-down converter. The LMR33630 provides exceptional efficiency and accuracy in a very small solution size.

In stock

Limit: 5

Evaluation board

LMR33630ARNXEVM — LMR33630 Synchronous Step Down Converter Evaluation Module

The LMR33630 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR33630A 400kHz synchronous step-down converter. The LMR33630 provides exceptional efficiency and accuracy in a very small solution size.

In stock

Limit: 5

Evaluation board

LMR33630CDDAEVM — LMR33630 Synchronous Step-Down Converter Evaluation Module

The LMR33630 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR33630 synchronous step-down converter. The LMR33630 provides exceptional efficiency and accuracy in a very small solution size.

In stock

Limit: 5

Evaluation board

LMR33630CRNXEVM — LMR33630 Synchronous Step Down Converter Evaluation Module

The LMR33630 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR33630C 2.1MHz synchronous step-down converter. The LMR33630 provides exceptional efficiency and accuracy in a very small solution size.

In stock

Limit: 5

Simulation model

LMR33630A Non-Inverting and inverting PSpice Transient Model (Rev. A)

SNVMBF6A.ZIP (159 KB) - PSpice Model

Simulation model

LMR33630A Non-Inverting and inverting Unencrypted PSpice Transient Model (Rev. A)

SNVMBF9A.ZIP (7 KB) - PSpice Model

Simulation model

LMR33630C Unencrypted PSpice Inverting and Non-Inverting Transient Model (Rev. A)

SNVMBG5A.ZIP (128 KB) - PSpice Model

Simulation model

LMR33630B Unencrypted PSpice Inverting and Non-Inverting Transient Model

SNVMBH1.ZIP (7 KB) - PSpice Model

Simulation model

LMR33630B Inverting and Non-Inverting PSpice Transient Model

SNVMBH2.ZIP (127 KB) - PSpice Model

Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)

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Calculation tool

Mode Transitions Calculator LMR336x0 LMR360xx

SNVC234.ZIP (442 KB)

Calculation tool

LMR336x0 Component Calculator

SNVR484.ZIP (938 KB)

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Schematic

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document-generic

Schematic

Reference designs

TIDA-010009 — Compact, efficient, 24-V input auxiliary power supply reference design for servo drives

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