LM61440-Q1

Name: LM61440-Q1
Brand: TI
SKU: LM61440-Q1
Price: 1.589 USD

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3-V bis 36-V, 4-A, rauscharmer Synchron-Abwärtswandler für die Automobilindustrie

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Datenblatt

document-pdfAcrobat LM61440-Q1Automotive 3-V to 36-V, 4-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. C) (Englisch) PDF | HTML

LM61440-Q1

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Rating

Automotive

Operating temperature range (°C)

-40 to 150

TI functional safety category

Functional Safety-Capable

Topology

Buck

Type

Converter

Iout (max) (A)

4

Vin (min) (V)

3

Vin (max) (V)

36

Switching frequency (min) (kHz)

200

Switching frequency (max) (kHz)

2200

Features

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

Control mode

current mode

Vout (min) (V)

1

Vout (max) (V)

34

Iq (typ) (µA)

8

Duty cycle (max) (%)

98

Rating

Automotive

Operating temperature range (°C)

-40 to 150

TI functional safety category

Functional Safety-Capable

Topology

Buck

Type

Converter

Iout (max) (A)

4

Vin (min) (V)

3

Vin (max) (V)

36

Switching frequency (min) (kHz)

200

Switching frequency (max) (kHz)

2200

Features

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

Control mode

current mode

Vout (min) (V)

1

Vout (max) (V)

34

Iq (typ) (µA)

8

Duty cycle (max) (%)

98

VQFN-HR (RJR)

14

14 mm² 4 x 3.5

AEC-Q100 qualified with the following results:
- 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 minimizes switch node ringing
- Parallel input path minimizes parasitic inductance
- Spread spectrum reduces peak emissions
- Adjustable SW node rise time
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
- 0.3-V dropout with 3-A load (typical)
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:
  - LM61460-Q1 (36 V, 6 A, adjustable f_SW)
  - LM61435-Q1 (36, 3.5 A, adjustable f_SW)

AEC-Q100 qualified with the following results:
- 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 minimizes switch node ringing
- Parallel input path minimizes parasitic inductance
- Spread spectrum reduces peak emissions
- Adjustable SW node rise time
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
- 0.3-V dropout with 3-A load (typical)
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:
  - LM61460-Q1 (36 V, 6 A, adjustable f_SW)
  - LM61435-Q1 (36, 3.5 A, adjustable f_SW)

The LM61440-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; tolerant of 42 V, easing input surge protection design. The LM61440-Q1 implements soft recovery from dropout eliminating overshoot on the output.

The LM61440-Q1 is specifically designed for minimal EMI. The device incorporates pseudo-random spread spectrum, adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be set or synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency 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, ensures exceptional efficiency across the entire load range.

The LM61440-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; tolerant of 42 V, easing input surge protection design. The LM61440-Q1 implements soft recovery from dropout eliminating overshoot on the output.

The LM61440-Q1 is specifically designed for minimal EMI. The device incorporates pseudo-random spread spectrum, adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be set or synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency 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, ensures exceptional efficiency across the entire load range.

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Technische Dokumentation

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	Typ	Titel		Datum
*	Data sheet	LM61440-Q1Automotive 3-V to 36-V, 4-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. C)	PDF \| HTML	22 Jun 2021
	Application note	How to Migrate Between LM614xx and LM624xx Product Families	PDF \| HTML	01 Nov 2021
	Functional safety information	LM614xx-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. B)	PDF \| HTML	15 Sep 2021
	EVM User's guide	LM61460-Q1 EVM User's Guide (Rev. D)	PDF \| HTML	30 Jul 2021
	Technical article	Powering levels of autonomy: a quick guide to DC/DC solutions for SAE autonomy lev		18 Nov 2020
	Functional safety information	FIT Rate, Failure Mode Distribution LM61440 Q1		31 Mär 2020
	Technical article	Optimizing flip-chip IC thermal performance in automotive designs	PDF \| HTML	11 Dez 2019

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

LM61460EVM — Evaluierungsmodul für 36-V-, 6-A-, 5-V-Synchron-Abwärtswandler mit niedrigem EMI-Wert, 400 kHz

The LM61460 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM61460 synchronous step-down converter. The LM61460 provides exceptional efficiency, low IQ, and low EMI in small solution size.

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