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LM70660

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High-density, 4.5V to 65V input, 6A low-EMI synchronous DC/DC step-down converter

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Data sheet

LM70660

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 6 Vin (max) (V) 65 Vin (min) (V) 4.5 Vout (max) (V) 36 Vout (min) (V) 0.8 Features Adjustable switching frequency, Auto Mode, Enable, Fixed Output, Forced PWM, Frequency synchronization, Over Current Protection, Power good, Soft Start Fixed, Stackable, Thermal shutdown, UVLO adjustable EMI features Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.0000065 Duty cycle (max) (%) 99 TI functional safety category Functional Safety-Capable Sector Robotics, Test & measurement
Rating Catalog Topology Buck Iout (max) (A) 6 Vin (max) (V) 65 Vin (min) (V) 4.5 Vout (max) (V) 36 Vout (min) (V) 0.8 Features Adjustable switching frequency, Auto Mode, Enable, Fixed Output, Forced PWM, Frequency synchronization, Over Current Protection, Power good, Soft Start Fixed, Stackable, Thermal shutdown, UVLO adjustable EMI features Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.0000065 Duty cycle (max) (%) 99 TI functional safety category Functional Safety-Capable Sector Robotics, Test & measurement
VQFN (RRX) 29 36 mm² (6 mm × 6 mm)
  • Functional Safety-Capable
  • Synchronous DC/DC converter with a versatile buck controller and robust power MOSFETs
    • Wide input voltage range: 4.5V to 65V
    • Shutdown mode current: 2.3µA
    • No-load IQ regulating 24V to 5V: 10.4µA
    • 1% accurate, fixed 3.3V, 5V, 12V, or adjustable outputs from 0.8V to 36V
    • Dual-phase operation enabling output currents up to 16A
  • Designed for low EMI requirements
    • Facilitates CISPR 11 Class B compliance
    • Pin-selectable ±8% dual-random spread spectrum reduces peak emissions
    • Switching frequency: 200kHz to 2.2MHz
    • Pin-configurable AUTO or FPWM operation
  • Inherent protection features for robust design
    • Internal hiccup-mode overcurrent protection
    • Enable, power good, and thermal shutdown
    • Internal or external loop compensation
  • 6mm × 6mm thermally optimized, RoHS compliant, QFN-29 package with Pb-free plating
  • Create a custom design using the LM706x0 with the WEBENCH Power Designer
  • Functional Safety-Capable
  • Synchronous DC/DC converter with a versatile buck controller and robust power MOSFETs
    • Wide input voltage range: 4.5V to 65V
    • Shutdown mode current: 2.3µA
    • No-load IQ regulating 24V to 5V: 10.4µA
    • 1% accurate, fixed 3.3V, 5V, 12V, or adjustable outputs from 0.8V to 36V
    • Dual-phase operation enabling output currents up to 16A
  • Designed for low EMI requirements
    • Facilitates CISPR 11 Class B compliance
    • Pin-selectable ±8% dual-random spread spectrum reduces peak emissions
    • Switching frequency: 200kHz to 2.2MHz
    • Pin-configurable AUTO or FPWM operation
  • Inherent protection features for robust design
    • Internal hiccup-mode overcurrent protection
    • Enable, power good, and thermal shutdown
    • Internal or external loop compensation
  • 6mm × 6mm thermally optimized, RoHS compliant, QFN-29 package with Pb-free plating
  • Create a custom design using the LM706x0 with the WEBENCH Power Designer

The LM706x0 is a family of low-IQ, wide-VIN synchronous buck converters designed for an input voltage range of 4.5V to 65V and delivering up to 10A of output current at fixed output voltages of 3.3V, 5V, 12V, or an adjustable output.

The LM706x0 uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM706x0 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 20A of output current.

The LM706x0 features a unique Dual Random Spread Spectrum (DRSS) function that combines low-frequency triangular and high-frequency cycle-by-cycle random modulations for improved EMI performance across a wide range of frequency bands.

Additional features of the LM706x0 include user-selectable diode emulation for lower current consumption at light-load conditions, open-drain Power-Good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator, internal 2.8ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM706x0 converter comes in a 6mm × 6mm thermally-optimized, 29-pin QFN package. The three die-attach pads (VIN, SW, and PGND) improve thermal performance and board level reliability (BLR).

The LM706x0 is a family of low-IQ, wide-VIN synchronous buck converters designed for an input voltage range of 4.5V to 65V and delivering up to 10A of output current at fixed output voltages of 3.3V, 5V, 12V, or an adjustable output.

The LM706x0 uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM706x0 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 20A of output current.

The LM706x0 features a unique Dual Random Spread Spectrum (DRSS) function that combines low-frequency triangular and high-frequency cycle-by-cycle random modulations for improved EMI performance across a wide range of frequency bands.

Additional features of the LM706x0 include user-selectable diode emulation for lower current consumption at light-load conditions, open-drain Power-Good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator, internal 2.8ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM706x0 converter comes in a 6mm × 6mm thermally-optimized, 29-pin QFN package. The three die-attach pads (VIN, SW, and PGND) improve thermal performance and board level reliability (BLR).
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet LM706x0 65V, 10A/6A, High-Efficiency Buck Converter Designed for High Power Density datasheet PDF | HTML Sep 19, 2024
Application note Controller to Converter – Design Considerations for 24V and 48V Systems PDF | HTML Oct 2, 2024
Functional safety information LM706A0 and LM70660 Functional Safety FIT Rate, FMD, and Pin FMA PDF | HTML Sep 19, 2024
Application note Reducing Conducted EMI in a Buck Converter for 48 V Automotive Applications PDF | HTML Dec 13, 2023
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators Apr 21, 2021
Technical article Using DC/DCs buck converters to power modern safety features in commercial vehicle PDF | HTML Jul 27, 2020
Technical article How to meet European Commission ADAS requirements with TI DC/DC converters PDF | HTML May 9, 2019
Technical article Top three qualities to consider when designing a video doorbell power supply PDF | HTML Sep 25, 2018
Application brief Improving RF Power Amplifier Efficiency in 5G Radio Systems Sep 5, 2018
White paper An overview of radiated EMI specifications for power supplies Jun 5, 2018
Technical article Effects of IC package on EMI performance PDF | HTML May 22, 2018
White paper An overview of conducted EMI specifications for power supplies Feb 1, 2018

Design & development

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Evaluation board

LM706A0QEVM — LM706A0-Q1 evaluation module

The LM706A0-Q1 high-density evaluation module (EVM) is designed to use a regulated or non-regulated high-voltage input rail ranging from 8V to 65V to produce a tightly regulated output voltage of 3.3V at load currents up to 10A. This wide VIN range DC/DC solution offers outsized voltage rating and (...)

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LM70880-Q1 PSpice Transient model (Rev. A)

SNVMCD7A.ZIP (3292 KB) - PSpice model
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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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LM70XX0-CALC — LM70XX0 quickstart design tool calculator

Quickstart calculator for LM70XX0
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VQFN (RRX) 29 Ultra Librarian
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