1 Features
1• LP8728D-Q1 is an Automotive Grade Product that
is AECQ-100 Grade 1 Qualified
• Four High Efficiency Step-Down DC-DC
Converters:
– 93% Peak Efficiency (VIN = 5 V, VOUT = 3.3 V)
– Max Output Current 1 A
– Forced PWM Operation
– Soft-Start Control
– VOUT1 = 3.3 V
– V OUT2 = 1.25 V
– V OUT3 = 1.8 V or 2.65 V (pin selectable)
– VOUT4 = 1.8 V
• Separate Enable Inputs for each Converter
Control
• Separate Power Good Outputs for each Converter
• Output Overcurrent and Input Overvoltage
Protection
• Overtemperature Protection
• Undervoltage Lockout (UVLO)

2 Applications
• FPGA, DSP Core Power
• Processor Power for Mobile Devices
• Peripheral I/O Power
• Automotive Safety Cameras
• Automotive Infotainment

3 Description
The LP8728D-Q1 is a quad-output Power
Management Unit (PMU), optimized for low-power
FPGAs, microprocessors, and DSPs for automotive
applications. This device integrates four highly
efficient step-down DC-DC converters into one
package. Each converter has high current capability
and separate controls which allows flexibility to use
the device in multiple applications. All the converters
operate above the AM band with a fixed 3.2-MHz
switching frequency. The high-side switch turn-on
time of each converter is phase shifted to minimize
input current spikes.
Protection features include output short-circuit
protection, switch current limits, input overvoltage
protection, input undervoltage lockout, and thermal
shutdown functions. During start-up, the device
controls the output slew rate to minimize output
voltage overshoot and the input inrush current.