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reference designLM706A0-Q1 | Demoboard LM706A0QEVM

Texas Instruments LM706A0-Q1 | Demoboard LM706A0QEVM

LM706A0-Q1 65V, 10A, Automotive, High-Efficiency Buck Converter Designed for High Power Density

Overview

TopologyBuck Converter
Input voltage8-65 V
Output 13.3 V / 10 A
IC revision1

Description

The LM706A0QEVM high-density 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 device offers outsized voltage rating and operating margin to withstand supply rail voltage transients.The free-running switching frequency is 400kHz and is synchronizable to an external clock signal at a higher or lower frequency. The power-train passive components selected for this EVM, including buck inductors and ceramic input and output capacitors, are automotive AEC-Q200 rated and are available from multiple component vendors.

Features

  • Wide input voltage operating range of 8V to 65V
  • 1% accurate fixed 3.3V, 5V, or adjustable output down to 0.8V
  • Switching frequency of 400kHz externally synchronizable up or down by 20%
  • Full-load efficiency of 89.3% at 12VIN, 88.1% at 24VIN and 85.4% at 48VIN
  • 260µA operating current at 48VIN
  • Designed for low Electromagnetic Interference (EMI)
  • Dual-random spread spectrum EMI mitigation
  • Meets CISPR 25 Class 5 and UNECE Reg 10 EMI standards
  • Peak current-mode control architecture provides fast line and load transient response
  • Integrated slope compensation adaptive with switching frequency
  • Forced pulsed width modulation (FPWM) or pulsed frequency modulation (PFM) operation
  • Optional internal or external loop compensation
  • Integrated high-side and low-side power MOSFETs
  • Overcurrent protection (OCP) with hiccup mode for sustained overload conditions
  • SYNCOUT signal 180° out-of-phase with internal clock
  • Power-Good signal with 100kΩ pullup resistor to VCC
  • Internal 3ms soft start
  • Fully assembled, tested, and proven PCB layout

Typical applications

  • High-current automotive electronic systems, ADAS and body electronics. Infotainment systems and instrument clusters, Automotive HEV/EV powertrain systems

More information

Parts approved by Texas Instruments

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Mount
SamplesAvailability & Sample
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74438356010
SPECWE-MAPI SMT Power Inductor, 1 µH, 10.1 A
Simu­lation
Availability
–
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance1 µH
Performance Rated Current10.1 A
Saturation Current @ 30%11.5 A
DC Resistance12 mΩ
Self Resonant Frequency55 MHz
Operating Voltage80 V
MountSMT 
–Check availability

Additional parts recommended by Würth Elektronik

Recommended parts are Würth Elektronik alternatives that are not formally approved for this reference design. Please verify it is suitable for your application, and contact us if you have any questions.

Log in now to view availability and request availability forecasts. LOGIN
Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
RDC max.(mΩ)
fres(MHz)
Mount
SamplesAvailability & Sample
Log in now to view availability and request availability forecasts. LOGIN
744393665022
SPECWE-XHMI SMT Power Inductor, 2.2 µH, 33 A
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-XHMI SMT Power Inductor
Inductance2.2 µH
Performance Rated Current33 A
Saturation Current @ 30%38 A
DC Resistance3.1 mΩ
DC Resistance4 mΩ
Self Resonant Frequency23 MHz
MountSMT 
–Check availability