Programmable microchip MCP16503

power controllerpoweranalog

Overview
The MCP16503 is a highly integrated power management IC (PMIC) designed for embedded MPU applications requiring Dynamic Voltage Scaling (DVS). It combines four DC‑DC Buck regulators and two auxiliary LDOs with flexible start-up and runtime configuration via resistor selection and a 1 MHz I2C interface. Buck channels support up to 1 A each and 100% duty cycle; two 300 mA LDOs are available for sensitive analog domains. Built-in sequencing, low-power modes and fault protections simplify MPU power management and platform migration.

Features

• Input voltage range: 2.7 V to 5.5 V
• Resistor-selectable default start-up voltages; full adjustment via 1 MHz I2C
• Four Buck outputs, 1 A each, 100% maximum duty cycle
• Buck PWM operation up to 2 MHz; I2C-selectable ±16.5% frequency displacement
• ±1% voltage accuracy for DDR (Buck2), Core (Buck3) and CPU (Buck4)
• Low-noise FPWM and low-IQ modes for light-load efficiency
• Two 300 mA auxiliary LDOs for analog supplies
• Built-in channel sequencing, safe start-up and active discharge resistors
• Support for Hibernate, Low-Power and High-Performance modes with DVS
• Low quiescent current (<300 µA typical, Bucks + LDO1 ON, no load); <10 µA shutdown
• Thermal shutdown, current-limit protection and user-programmable overcurrent response
• DDR voltage (Buck2) selectable via 3-state input pin for easy memory migration
• AEC-Q100 qualified variant available

Parametrics (key values)
Input voltage: 2.7–5.5 V
Buck output current: 1 A per channel
LDO output current: 300 mA per LDO
Number of regulated Buck outputs: 4
Number of regulated LDO outputs: 2
Max Buck PWM: 2 MHz
I2C interface: 1 MHz
Max duty cycle: 100%
Package: 32-pin 5 mm × 5 mm VQFN
Junction temp range: -40°C to +125°C

Technical specifications

• Four DC‑DC Buck regulators with safe start-up into pre-biased outputs
• Two auxiliary LDOs (300 mA each) for analog/sensitive rails
• Resistor-selectable start-up voltages and full I2C programmability for DVS
• Low quiescent operation and <10 µA full shutdown current for power-sensitive systems
• Configurable operating modes: Hibernate, Low-Power, High-Performance, Active
• Comprehensive MPU interface: interrupt flag, optimized ESD protection, and diagnostics via I2C
• Protections: thermal shutdown, current limit, active discharge, programmable fault response
• Package and qualification: 32-pin 5×5 mm VQFN; AEC-Q100 variant available