Texas Instruments LM70880-Q1 User Manual

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EVM User's Guide: LM70880-Q1 LM70880QEVM
LM70880-Q1 Buck Converter Evaluation Module
Description
The LM70880QEVM high-density EVM is designed to
use a regulated or non-regulated high-voltage input
rail ranging from 8V to 72V to produce a tightly
regulated output voltage of 5V at load currents up to
8A. This wide V range DC/DC device offers outsized
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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 72V
• 1% accurate fixed 5V, 3.3V, or adjustable output
down to 0.8V
• Switching frequency of 400kHz externally
synchronizable up or down by 20%
• Full-load efficiency of 93.6% at 12V
48V
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• 260µA operating current at 48V
SNVU872A – SEPTEMBER 2023 – REVISED MARCH 2024
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Optimized for low 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 PWM (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
High-current automotive electronic systems
ADAS and body electronics
Infotainment systems and
Automotive HEV/EV powertrain systems
LM70880-Q1 Buck Converter Evaluation Module
Description
instrument clusters
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