Front End

• Error Analog to Digital Converter (EADC)

-- 15.625Msps Sample Rate

-- 1mV/LSB Resolution

-- Adaptive Sample Trigger Positioning

-- Flexible Sample Trigger (Single, Multi-Sample, Oversample) 

-- Hardware-Based Averaging (up to 8x)

• 11-bit High Accuracy and High-Speed Digital-to-Analog Converter (DAC)

Digital Filters 

• Digital PID-Based Hardware (2-Pole/2-Zero)
• Non-Linear Control
• Hardware Support for Anti-Saturation 
• Input Voltage Feed-Forward Control

DPWM Modules

• 3x DPWM Modules, 6x Outputs
• Up to Eight High Resolution Outputs

-- 250ps Pulse Width Resolution

-- 4ns Frequency Resolution

• Configurable Modulation Methods

-- Pulse Width Modulation

-- Frequency Modulation

-- Phase Shift Modulation

• Automatic Mode Switching via Hardware
• Independent or Synchronization Mode 

-- Independent Mode

-- Synchronized: Between DPWM Modules or Other Devices

• Multi-Counter Reset Sources
• Synchronous Rectification (SR) Soft ON/OFF 
• Multi-Burst Mode via Hardware
• DPWM Output Synchronous ON/OFF Control
• Flexible Sample Trigger for Front End
• Multiple Preload and Shadow Registers for Firmware Synchronous Control
• Up to 2MHz Switching Frequency

Fault Protection

• 8x Analog and 3x Digital Comparators
• Flexible Programmable Blanking Time
• Cycle-by-Cycle Current Limiting with Duty Match
• External Fault Inputs

12-bit, 1Msps General Purpose ADC

• 5x External Channels
• Internal Temperature Sensor
• Integrated 10μA PMBus Address Current Source
• Integrated 10/20/30/40μA NTC Current Source 

62.5MHz, 32-Bit Cortex-M4F Processor

• Integrated FPU
• Memories:

-- 64KB Program Flash 

-- 64KB Data Flash with ECC

-- 8KB Boot Flash

-- 16KB RAM with ECC

-- 4KB Instruction and Data SRAM

• SWD Debug Support

Communication Peripherals

• I2C/PMBUS with Peripheral or Target Mode
• UART with Auto Baud Rate Adjustment

Timers

• 4x 32-bit General Purpose Timers
• 1x Capture
• 2x General Purpose PWM Outputs

Power Control Features

• Voltage Control, Average Current Control, and Peak Current Mode Control
• High Efficiency and Light Load Management
• Constant Voltage Constant Current (CVCC)
• Support for Compensator Output (Vc) Soft-Start
• Primary Side Voltage Sensing
• Pre-Bias Load Soft-Start

24-PIN QFN Package

Operating Temperature: –40°C to 125°C

The SQ51100 is a digital power supply controller designed to enhance the performance of isolated DC-DC and AC-DC converters through multiple integrated peripherals. 

The SQ51100 features high speed, configurable hardware loop peripherals that support the implementation of high frequency switching converters. These main core peripherals include three high speed front ends (Error ADC, 11-bit DAC), three digital PID-based compensators (2-pole/2-zero), and eight high speed comparators for protection.

Built on a 62.5MHz, 32-bit ARM® Cortex-M4F microcontroller, this device also integrates a 12-bit, 1Msps general-purpose ADC with up to five channels, four 32-bit timers, UART, and PMBus communication ports enabling the SQ51100 to configure peripherals, manage communications, and perform real-time monitoring.