Complete 6-A buck power stage with integrated
power MOSFETs and PWM controller
Wide input voltage operating range of 3 V to 36 V (absolute maximum rating of 42
V)
Input voltage UVLO turn-on and turn-off thresholds set at 4.5 V and 3.2
V, respectively
Default output voltage and
switching frequency of 5 V and 2.1 MHz, respectively. The LM63460-Q1 has a
resistor-programmable switching frequency from 200 kHz to 2.2 MHz using its RT
pin, whereas the LM64460-Q1 has a default frequency of 2.1 MHz but is
synchronizable over the same range.
High efficiency across a wide load-current
range
Half-load and full-load
efficiencies of 94.4% and 92.5% at VIN = 13.5 V
External bias option
reduces no-load supply current and enhances thermal performance
Improved EMI
performance for noise-sensitive automotive applications
Meets CISPR 25 Class 5
EMI standard for both conducted and radiated emissions
Input π-stage EMI filter
with electrolytic capacitor for parallel damping
Parallel input and output
paths with symmetrical capacitor layouts minimize radiated field
coupling
Clock synchronization and
optional FPWM mode provide constant switching frequency across the full
load range
Integrated input, VCC,
and bootstrap capacitors enable low-noise switching performance
Pseudo-random spread
spectrum modulation (PRSS) for lower peak emissions
Included by
default in the LM63460-Q1
Configurable in
the LM64460-Q1 – connect the MODE/SYNC pin of the IC to VCC or
GND to enable spread spectrum in FPWM and auto modes,
respectively.
Peak current-mode control architecture enables
fast line and load transient response
Integrated loop
compensation components and frequency-proportional slope
compensation
Inherent protection features for
robust and reliable design
Overcurrent protection
(OCP) with peak and valley current limits
Thermal shutdown
protection with hysteresis
PGOOD indicator with
100-kΩ pullup resistor to VOUT
Resistor-programmable
input voltage UVLO
Fully assembled, tested and proven, 4-layer PCB
layout with 76-mm × 38-mm total footprint