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LM61480T-Q1

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8A automotive buck converter optimized for power density and low EMI with top exposed pad

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Data sheet

LM61480T-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Operating temperature range (°C) to TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 8 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed, Wettable flanks package EMI features Spread Spectrum Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34.2 Iq (typ) (µA) 5 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) to TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 8 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed, Wettable flanks package EMI features Spread Spectrum Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34.2 Iq (typ) (µA) 5 Duty cycle (max) (%) 98
VQFN-HR (VAM) 16 15.75 mm² 4.5 x 3.5
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Input voltage range from 3V to 36V
  • Designed for low EMI:
    • CISPR 25 class 5 compliant EVM
    • Pin-configurable spread spectrum
    • Adjustable SW node rise time
    • Above and below AM band operation: pin configurable 400kHz and 2.2MHz fixed or adjustable from 200kHz – 2.2MHz
    • Low EMI symmetrical pinout
    • Light load mode is pin-configurable for constant frequency or pulse frequency modulation (PFM)
  • High-efficiency design
    • 95% efficient for an 8A load at 5VOUT
    • < 1µA shutdown current (typical)
  • High power density
    • Built-in compensation, soft start, current limit, thermal shutdown, and UVLO
    • 4.5mm × 3.5mm wettable flank QFN package
  • Thermally enhanced package provides exposed top and bottom thermal pads and enables dual-side cooling with RθJC(top) = 0.64°C/W
  • Pin compatible with LM62460-Q1, LM61480-Q1, and LM61495-Q1
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Input voltage range from 3V to 36V
  • Designed for low EMI:
    • CISPR 25 class 5 compliant EVM
    • Pin-configurable spread spectrum
    • Adjustable SW node rise time
    • Above and below AM band operation: pin configurable 400kHz and 2.2MHz fixed or adjustable from 200kHz – 2.2MHz
    • Low EMI symmetrical pinout
    • Light load mode is pin-configurable for constant frequency or pulse frequency modulation (PFM)
  • High-efficiency design
    • 95% efficient for an 8A load at 5VOUT
    • < 1µA shutdown current (typical)
  • High power density
    • Built-in compensation, soft start, current limit, thermal shutdown, and UVLO
    • 4.5mm × 3.5mm wettable flank QFN package
  • Thermally enhanced package provides exposed top and bottom thermal pads and enables dual-side cooling with RθJC(top) = 0.64°C/W
  • Pin compatible with LM62460-Q1, LM61480-Q1, and LM61495-Q1

The LM614xxT-Q1 buck converters are automotive-focused regulators providing adjustable output voltage, which can be set from 1V to 95% of expected input voltage. These regulators operate under a wide input voltage range of 3V to 36V and have transient tolerance up to 42V.

The family is designed for low EMI. The device incorporates pin selectable spread spectrum, and an adjustable SW node rise time. Dual Random Spread Spectrum (DRSS) frequency hopping is set to ±4% (typical), drastically reducing peak emissions through a combination of triangular and pseudorandom modulation, and includes advanced techniques to reduce output voltage ripple caused by spread spectrum modulation.

An open-drain RESET output, with filtering and delayed release, gives a true indication of system status. In auto mode, the device automatically transitions between fixed frequency Pulse Width Modulation (FPWM) and Pulse Frequency Modulation (PFM) modes of operation, allowing an unloaded current consumption of only 5µA (typical). Electrical characteristics are specified over a junction temperature range of –40°C to +150°C.

The LM614xxT-Q1 buck converters are automotive-focused regulators providing adjustable output voltage, which can be set from 1V to 95% of expected input voltage. These regulators operate under a wide input voltage range of 3V to 36V and have transient tolerance up to 42V.

The family is designed for low EMI. The device incorporates pin selectable spread spectrum, and an adjustable SW node rise time. Dual Random Spread Spectrum (DRSS) frequency hopping is set to ±4% (typical), drastically reducing peak emissions through a combination of triangular and pseudorandom modulation, and includes advanced techniques to reduce output voltage ripple caused by spread spectrum modulation.

An open-drain RESET output, with filtering and delayed release, gives a true indication of system status. In auto mode, the device automatically transitions between fixed frequency Pulse Width Modulation (FPWM) and Pulse Frequency Modulation (PFM) modes of operation, allowing an unloaded current consumption of only 5µA (typical). Electrical characteristics are specified over a junction temperature range of –40°C to +150°C.
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* Data sheet LM614xxT-Q1 3V to 36V, 8A/10A, Automotive, Buck Converter Optimized for Power Density and Low EMI in a Thermally Enhanced Package for Dual Side Cooling datasheet (Rev. A) PDF | HTML 12 Dec 2024
Functional safety information LM62460-Q1, LM61480(T)-Q1, and LM61495(T)-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. B) PDF | HTML 12 Dec 2024

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Evaluation board

LM61495RPHEVM — LM61495-Q1 synchronous 10-A, 400-kHz step-down converter evaluation module

The LM61495RPHEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM61495-Q1 synchronous step-down converter.  The LM61495-Q1 provides exceptional efficiency, low IQ, and low EMI in a small solution size.
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VQFN-HR (VAM) 16 Ultra Librarian
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