LM62440-Q1

AKTIV

Rauscharmer synchroner Abwärtswandler, 3 bis 36 V, 4 A, für die Automobilindustrie

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Datenblatt

document-pdfAcrobat LM62440-Q1 Automotive 3-V to 36-V, 4-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. E) (Englisch) PDF | HTML

LM62440-Q1

AKTIV

Jetzt bestellen

Produktdetails

Rating

Automotive

Topology

Buck

Iout (max) (A)

4

Vin (max) (V)

36

Vin (min) (V)

3

Vout (max) (V)

34

Vout (min) (V)

1

Features

Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package

EMI features

Low parasitic Hotrod packaging, Spread Spectrum

Control mode

current mode

Operating temperature range (°C)

-40 to 150

Iq (typ) (A)

0.000007

Duty cycle (max) (%)

98

TI functional safety category

Functional Safety-Capable

Rating

Automotive

Topology

Buck

Iout (max) (A)

4

Vin (max) (V)

36

Vin (min) (V)

3

Vout (max) (V)

34

Vout (min) (V)

1

Features

Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package

EMI features

Low parasitic Hotrod packaging, Spread Spectrum

Control mode

current mode

Operating temperature range (°C)

-40 to 150

Iq (typ) (A)

0.000007

Duty cycle (max) (%)

98

TI functional safety category

Functional Safety-Capable

VQFN-HR (RJR)

14

14 mm² (4 mm × 3.5 mm)

AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C to +150°C, T_J
Functional Safety-Capable
- Documentation available to aid functional safety system design
Optimized for ultra low EMI requirements
- HotRod™ package and parallel input path minimize switch node ringing
- Spread spectrum reduces peak emissions
- 2.1-MHz and 400-kHz factory options
- Adjustable SW node rise time
- Pin selectable FPWM mode for constant frequency at light loads
Designed for automotive applications
- Supports 42-V automotive load dump
- ±1% total output regulation accuracy
- V_OUT adjustable from 1 V to 95% of V_IN, with factory options for 5-V and 3.3-V fixed output voltages
High efficiency power conversion at all loads
- 7-µA no load current at 13.5 V_IN, 3.3 V_OUT
- 83% PFM efficiency at 1 mA, 13.5 V_IN, 5 V_OUT
- External bias option for improved efficiency
Suitable for scalable power supplies
- Pin compatible with:
  - LM61440-Q1 (36 V, 4 A, adjustable f_SW)
  - LM61460-Q1 (36 V, 6 A, adjustable f_SW)
  - LMQ62440-Q1 (36 V, 4 A, internal capacitors)

AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C to +150°C, T_J
Functional Safety-Capable
- Documentation available to aid functional safety system design
Optimized for ultra low EMI requirements
- HotRod™ package and parallel input path minimize switch node ringing
- Spread spectrum reduces peak emissions
- 2.1-MHz and 400-kHz factory options
- Adjustable SW node rise time
- Pin selectable FPWM mode for constant frequency at light loads
Designed for automotive applications
- Supports 42-V automotive load dump
- ±1% total output regulation accuracy
- V_OUT adjustable from 1 V to 95% of V_IN, with factory options for 5-V and 3.3-V fixed output voltages
High efficiency power conversion at all loads
- 7-µA no load current at 13.5 V_IN, 3.3 V_OUT
- 83% PFM efficiency at 1 mA, 13.5 V_IN, 5 V_OUT
- External bias option for improved efficiency
Suitable for scalable power supplies
- Pin compatible with:
  - LM61440-Q1 (36 V, 4 A, adjustable f_SW)
  - LM61460-Q1 (36 V, 6 A, adjustable f_SW)
  - LMQ62440-Q1 (36 V, 4 A, internal capacitors)

The LM62440-Q1 is an automotive-focused, high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 4 A of output current is delivered over a wide input range of 3.0 V to 36 V; 42-V tolerance supports load dump for durations of 400 ms. The LM62440-Q1 implements soft recovery from dropout, eliminating overshoot on the output.

The LM62440-Q1 is specifically designed for minimal EMI. The device incorporates pseudorandom spread spectrum, adjustable SW node rise time, a low-EMI VQFN-HR package featuring low switch node ringing, and an optimized pinout for ease of use. The switching frequency can be synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, either 2.1-MHz or 400-kHz frequency factory options can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

Auto mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, provides exceptional efficiency across the entire load range.

The LM62440-Q1 is an automotive-focused, high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 4 A of output current is delivered over a wide input range of 3.0 V to 36 V; 42-V tolerance supports load dump for durations of 400 ms. The LM62440-Q1 implements soft recovery from dropout, eliminating overshoot on the output.

The LM62440-Q1 is specifically designed for minimal EMI. The device incorporates pseudorandom spread spectrum, adjustable SW node rise time, a low-EMI VQFN-HR package featuring low switch node ringing, and an optimized pinout for ease of use. The switching frequency can be synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, either 2.1-MHz or 400-kHz frequency factory options can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

Auto mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, provides exceptional efficiency across the entire load range.

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Top-Dokumentation	Typ	Titel	Format-Optionen
*	Datenblatt	LM62440-Q1 Automotive 3-V to 36-V, 4-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. E)	PDF \| HTML	18.04.2022
	Informationen zur funktionalen Sicherheit	LM62440-Q1 Functional Safety, FIT Rate, Failure Mode Distribution, and Pin FMA (Rev. A)	PDF \| HTML	17.05.2022
	Anwendungshinweis	How to Migrate Between LM614xx and LM624xx Product Families	PDF \| HTML	01.11.2021
	Technischer Artikel	Introduction to EMI: Standards, causes and mitigation techniques	PDF \| HTML	21.04.2021
	Auswahlhilfe	Buck Converter Quick Reference Guide (Rev. B)		08.04.2021
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Design und Entwicklung

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Evaluierungsplatine

LM62440EVM — Evaluierungsmodul für synchronen Abwärtswandler mit 36 V und niedrigem EMI von 4 A, 5 V, 2 MHz

Das LM62440-Evaluierungsmodul (EVM) ist eine vollständig bestückte und getestete Platine zur Evaluierung des Synchron-Abwärtswandlers LM62440. Der LM62440 bietet einen hervorragenden Wirkungsgrad, einen niedrigen Ruhestrom und geringe EMI-Werte bei einer kleinen Lösungsgröße.

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Evaluierungsplatine

LP877451Q1EVM — LP8774x-Q1 – Evaluierungsmodul für ADAS-PMIC, rauscharme Konfiguration sowie Abwärtswandlung auf 3 V

Der LP8774x-Q1-Baustein wurde entwickelt, um die Power-Management-Anforderungen der AWR- und IWR-MMICs verschiedener Radaranwendungen im Automobilbereich und in der Industrie zu erfüllen. Der Baustein umfasst drei DC/DC-Abwärtswandler, einen 5 V-Aufwärtswandler und einen 1,8 V/3,3 V LDO. Der LDO (...)

Benutzerhandbuch: PDF | HTML