LM60430

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3.8-V to 36-V, 3-A, ultra-small synchronous step-down converter

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Data sheet

document-pdfAcrobat LM604x0 3.8-V to 36-V, 3-A, and 4-A Ultra-Small Synchronous Step-Down Converter datasheet (Rev. A) PDF | HTML

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LMR33630

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SIMPLE SWITCHER® 3.8V to 36V, 3A Synchronous Buck Converter With Ultra-Low EMI SOIC-8 and HotRod QFN package option

LM60430

ACTIVE

Data sheet

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Product details

Rating

Catalog

Operating temperature range (°C)

-40 to 150

Topology

Buck

Type

Converter

Iout (max) (A)

3

Vin (min) (V)

3.8

Vin (max) (V)

36

Switching frequency (min) (kHz)

400

Switching frequency (max) (kHz)

1000

Features

Enable, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Synchronous Rectification, UVLO adjustable, Wettable flanks package

Control mode

current mode

Vout (min) (V)

1

Vout (max) (V)

24

Iq (typ) (µA)

24

Duty cycle (max) (%)

98

Rating

Catalog

Operating temperature range (°C)

-40 to 150

Topology

Buck

Type

Converter

Iout (max) (A)

3

Vin (min) (V)

3.8

Vin (max) (V)

36

Switching frequency (min) (kHz)

400

Switching frequency (max) (kHz)

1000

Features

Enable, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Synchronous Rectification, UVLO adjustable, Wettable flanks package

Control mode

current mode

Vout (min) (V)

1

Vout (max) (V)

24

Iq (typ) (µA)

24

Duty cycle (max) (%)

98

WQFN-FCRLF (RPK)

13

6 mm² 3 x 2

Functional Safety-Capable
- Documentation available to aid functional safety system design
Low EMI and switching noise
- Meets CISPR22 class 5 standard
- Enhanced QFN package minimizes parasitic inductance and switch node ringing
Configured for rugged industrial applications
- Standard QFN footprint: single large thermal pad and all pins accessible from perimeter
- Pin compatible variants:
  - LM60440 (36 V, 4 A)
  - LM60430 (36 V, 3 A)
- Junction temperature range –40°C to +150°C
- Frequency: 400 kHz, 1 MHz
- Output voltage range: 1 V to 24 V
High efficiency power conversion at all loads
- Peak efficiency > 95%
- 90% PFM efficiency at 10-mA, 12 V_IN, 5 V_OUT
- Low operating quiescent current of 25 µA
Create a custom design using the LM60440 with the WEBENCH^® Power Designer

Functional Safety-Capable
- Documentation available to aid functional safety system design
Low EMI and switching noise
- Meets CISPR22 class 5 standard
- Enhanced QFN package minimizes parasitic inductance and switch node ringing
Configured for rugged industrial applications
- Standard QFN footprint: single large thermal pad and all pins accessible from perimeter
- Pin compatible variants:
  - LM60440 (36 V, 4 A)
  - LM60430 (36 V, 3 A)
- Junction temperature range –40°C to +150°C
- Frequency: 400 kHz, 1 MHz
- Output voltage range: 1 V to 24 V
High efficiency power conversion at all loads
- Peak efficiency > 95%
- 90% PFM efficiency at 10-mA, 12 V_IN, 5 V_OUT
- Low operating quiescent current of 25 µA
Create a custom design using the LM60440 with the WEBENCH^® Power Designer

The LM604x0 regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged industrial applications. The LM60430 drives up to 3-A of load current, and the LM60440 is industry’s smallest 4A step-down converter.

The LM604x0 is available in an ultra-miniature WQFN package with wettable flanks and a standard QFN pin-out with a thermal pad to enhance thermal performance. This enhanced QFN package features extremely small parasitic inductance and resistance, enabling very high efficiency while minimizing switch node ringing and dramatically reducing EMI.

The LM604x0 uses peak-current-mode control to automatically fold back frequency at light load to ensure exceptional efficiency across the entire load range. The low power dissipation paired with a thermally optimized QFN package enables a power dense solution size. In addition the device requires few external components and has a pinout designed for simple PCB layout. The small solution size and feature set of the LM604x0 are designed to simplify implementation for a wide range of end equipment.

This device is also available in an AEC-Q100-qualified version.

The LM604x0 regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged industrial applications. The LM60430 drives up to 3-A of load current, and the LM60440 is industry’s smallest 4A step-down converter.

The LM604x0 is available in an ultra-miniature WQFN package with wettable flanks and a standard QFN pin-out with a thermal pad to enhance thermal performance. This enhanced QFN package features extremely small parasitic inductance and resistance, enabling very high efficiency while minimizing switch node ringing and dramatically reducing EMI.

The LM604x0 uses peak-current-mode control to automatically fold back frequency at light load to ensure exceptional efficiency across the entire load range. The low power dissipation paired with a thermally optimized QFN package enables a power dense solution size. In addition the device requires few external components and has a pinout designed for simple PCB layout. The small solution size and feature set of the LM604x0 are designed to simplify implementation for a wide range of end equipment.

This device is also available in an AEC-Q100-qualified version.

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Technical documentation

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	Type	Title		Date
*	Data sheet	LM604x0 3.8-V to 36-V, 3-A, and 4-A Ultra-Small Synchronous Step-Down Converter datasheet (Rev. A)	PDF \| HTML	18 Jun 2020
	Application note	Enhanced HotRod QFN Package: Industry-Best Size with Low EMI (Rev. A)	PDF \| HTML	17 Aug 2021
	Functional safety information	LM604x0 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA	PDF \| HTML	01 Oct 2020
	EVM User's guide	LM60440AQEVM User's Guide		08 Oct 2019

Design & development

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

Evaluation board

LM60440AQEVM — 36-V, 4-A, 2x3-mm synchronous step-down converter evaluation module

The LM60440AQEVM evaluation module (EVM) helps designers evaluate the operation and performance of the LM60440-Q1 wide-input buck regulator. The LM60440-Q1 is an easy-to-use synchronous step-down DC/DC converter capable of driving up to 4 A of load current from an input voltage of up to 36 V. The (...)

User guide: PDF