SCT81420.pdf? Functional Safety-Capable
Documentation available to aid functional safety
system design
? Wide input operating range for battery applications
3.5-V to 45-V operating range
2.97-V to 16-V when BIAS = VCC
Minimum boost supply voltage 1.5 V when
BIAS ≥ 3.5 V
Input transient protection up to 50 V
? Minimized battery drain
Low shutdown current (IQ ≤ 2.6 μA)
Low operating current (IQ ≤ 480 μA)
? Small solution size and low cost
Maximum switching frequency of 2.2 MHz
12-Pin WSON package (3 mm × 2 mm)
Integrated error amplifier allows primary-side
regulation without optocoupler (flyback)
Minimized undershoot during cranking (startstop
application)
? Higher efficiency with low-power dissipation
100-mV ±7% Low current limit threshold
Strong 1.5-A peak standard MOSFET driver
Supports external VCC supply
? Avoid AM band interference and crosstalk
Optional clock synchronization
Dynamically programmable switching frequency
from 100 kHz to 2.2 MHz
? Integrated protection features
Constant peak current limiting over input
voltage
Optional hiccup mode short-circuit protection
(see the Device Comparison Table)
Programmable line UVLO
OVP protection
Thermal shutdown
? Accurate ±1% accuracy feedback reference
? Programmable extra slope compensation
? Adjustable soft start
? PGOOD indicator
? Create a custom design using the LM5155x with
the WEBENCH? power designer
