Texas Instruments LM25148B-Q1 User Manual

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EVM User's Guide: LM25148B-Q1EVM-2100
LM25148B-Q1 Buck Converter Evaluation Module
Description
The LM25148B-Q1EVM2100 high-density EVM is
designed to use a regulated or non-regulated high-
voltage input rail ranging from 5.5V to 36V to produce
a tightly regulated output voltage of 5V at load
currents up to 10A. This wide V
design offers outsized voltage rating and operating
margin to withstand supply rail voltage transients.
The free-running switching frequency is 2.1MHz and
is able to be synchronized 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 5.5V to 36V
• 1% accurate fixed 5V output
• Switching frequency of 2.1MHz externally able to
be synchronized up or down by 20%
• Full-load efficiency of 93.3% at V
• 9.9µA typical controller standby current at V
12V
• Optimized for ultra-low Electromagnetic
Interference (EMI)
– Dual-random spread spectrum and active EMI
filtering
SNVU898A – MAY 2024 – REVISED OCTOBER 2024
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range DC/DC
IN
= 12V
IN
=
IN
LM25148B-Q1 EVM, 83mm × 43mm
Copyright © 2024 Texas Instruments Incorporated
• 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 MOSFET
gate drivers
– 2.2A and 3.2A sink and source gate drive
current capability
– 20ns adaptive dead-time control reduces power
dissipation and MOSFET temperature rise
• Overcurrent protection (OCP) with hiccup mode for
sustained overload conditions
• SYNCOUT signal 180° out-of-phase with internal
clock
• Power-Good signal with open drain
• Internal 3ms soft start
• Fully assembled, tested, and proven PCB layout
with 83mm × 43mm total footprint
Applications
• High-current automotive electronic systems
• ADAS and body electronics
• Infotainment systems
• Automotive HEV/EV powertrain systems
LM25148B-Q1 Buck Converter Evaluation Module
Description
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