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)

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

Digital Filter 

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

DPWM Module

• 4x DPWM Modules, 8x Outputs
• Up to 8 High Resolution Outputs

-- 250ps Pulse Width Resolution

-- 4ns Frequency Resolution

• Configurable Modulation Methods

-- Pulse Width Modulation

-- Frequency Modulation

-- Phase Shift Modulation

• Automatic Mode Switching by Hardware
• Independent or Synchronization Mode 

-- Independent Mode

-- Synchronized: Between DPWM Module or Other Devices

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

Fault Protection

• 7x 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

• 7x External Channels
• Internal Temperature Sensor
• Integration 10uA PMBus Address Current Source
• Integration 10/20/30/40uA 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 & Data SRAM

• SWD Debug Support

Communication Peripherals

• I2C/PMBUS with Master or Slave Mode
• UART with Auto Baud Rate Adjustment

Timer

• 4x 32bit 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 
• Support Compensator Output (Vc) Soft Start
• Primary Side Voltage Sensing
• Pre-bias Load Soft Start

40-PIN QFN Packages

Operating Temperature: –40°C to 125°C

The SQ51103 is a digital power supply controller. Multiple integrated peripherals can improve performance for isolated DC-DC and AC-DC converters.

The SQ51103 controller contains high speed configurable hardware loop peripherals to support high switching frequency converters. These main core peripherals are 3x high speed Front End (Error ADC, 11-bit DAC), 3x digital PID-based compensator (2-pole/2-zero), 7x high speed comparator for protect.

SQ51103 is based on a 62.5MHz, 32-bit ARM® Cortex-M4F microcontroller. The device also contains a 12-bit, 1Msps general-purpose ADC with up to 7 channels, 4x 32-bit Timers, UART, and PMBus communications ports. Thus, SQ51103 can configure peripherals, manage communications and perform real-time monitoring.