FEATURES AND BENEFITS
• AEC-Q100 Grade 1 qualified
• ClearPower module DC/DC converter with internal
passive components
• VIN Range: 3.5 to 36 V operating, 40 V transient
• VOUT: 0.8 to 24 V, ±1.5% accuracy, ‒40°C to 150°C
• Up to 3 A of continuous output current
• Ultra-Low EMI design and selectable spread spectrum
to easily pass CISPR25 Class 5
• Low-Power (LP) mode: 6 μA IQ from VIN at no load,
automatic transition from LP to PWM mode
• Fixed Frequency PWM (fOSC): 1 MHz to 2.4 MHz,
programmable
• Synchronization (1 MHz to 2.4 MHz): PLL-based,
fSYNC can be above or below fOSC
• CLKOUT: Phase-shifted clock output for reduced EMI in
multi-converter systems
• Accurate enable input threshold
• Overvoltage, pulse-by-pulse current limit, hiccup mode
short-circuit, and thermal protections
• Robust FMEA: pin open/short and component faults

APPLICATIONS:
• Infotainment
• Navigation systems
• ADAS
• Industrial systems

DESCRIPTION
The APM81911 is a highly integrated, 3 A, low EMI, DCDC
buck regulator module that satisfies demanding power
delivery requirements. The APM81911 includes a high-performance
DC-DC regulator IC, two capacitors, and an inductor
in a compact 4 mm × 6 mm QFN package. The module
includes all the control and protection circuitry necessary
to produce a robust and scalable DC-DC regulator solution
with ±1.5% output voltage accuracy over the full operating
temperature range.
The fixed frequency, peak current mode control is programmable
from 1 MHz to 2.4 MHz, ensuring rapid response to
load and line transients. A 2.15 MHz PWM switching frequency
is programmed by connecting the FSET pin to VCC.
The VIN and BOOT pin bypass capacitors are integrated
into the module to greatly reduce noise-generating hot loops
which significantly improves radiated EMI. Spread spectrum
operation (dithering) is available to further reduce EMI. The
APM81911-1 part variant is available for applications where
dithering is not desired.
The Low Power (LP) mode maintains the output voltage at
no-load or very light load conditions while drawing only
microamps from VIN. At no-load, the APM81911 draws
only 6 μA. The transition between PWM and LP modes
is automatic in response to the load demand. PWM-only
operation is available to prevent pulse skipping at light load
conditions.