MIC2800 Digital Power Management IC 2 MHz, 600 mA DC/DC with Dual 300 mA/300 mA Low V LDOs IN Features General Description 2.7V to 5.5V Input Voltage Range The MIC2800 is a high-performance power management IC, featuring three output voltages with 2 MHz DC/DC Converter and Two LDOs maximum efficiency. Integrating a 2MHz DC/DC Integrated Power-on Reset (POR) converter with an LDO post-regulator, the MIC2800 - Adjustable POR Delay Time gives two high-efficiency outputs with a second, LOWQ Mode 300mA LDO for maximum flexibility. The MIC2800 - 30 A Total IQ when in LOWQ Mode features a LOWQ mode, reducing the total current DC/DC Converter draw while in this mode to less than 30 A. In LOWQ mode, the output noise of the DC/DC converter is - Up to 600 mA of Output Current in PWM reduced to 75 V , significantly lower than other Mode RMS converters that use a PFM light load mode that can Mode: NO RIPPLE Light Load Mode -LOWQ interfere with sensitive RF circuitry. -75V Output Noise in LOWQ Mode RMS The DC/DC converter uses small values of L and C to - 2 MHz PWM Mode Operation reduce board space but still retains efficiencies over - > 90% Efficiency 90% at load currents up to 600 mA. LDO1 Input Voltage Directly Connected to DC/DC The MIC2800 operates with very small ceramic output Converter Output Voltage for Maximum Efficiency capacitors and inductors for stability, reducing required - Ideal for 1.8V to 1.5V Conversion board space and component cost and it is available in - 300 mA Output Current from 1.8V Input various output voltage options in the 16-pin - Output Voltage Down to 0.8V 3mm x 3mm QFN leadless package. LDO2 300 mA Output Current Capable Package Type Thermal Shutdown Protection Current Limit Protection MIC2800 Simple, Leakage-Free Interfacing to Host MPU in 16-PIN 3mm X 3mm QFN Applications with Backup Power Tiny 16-Pin 3mm x 3mm QFN Package Applications Embedded MPU and MCU Power Portable and Wearable Applications Pin 1 Pin 12 POR LOWQ Low-Power RF Systems Backup Power Systems Pin 2 BIAS LDO1 Pin 11 Pin 3 SGND Pin 10 LDO PGND Pin 9 Pin 4 FB 2017 Microchip Technology Inc. DS20005839A-page 1 EN2 Pin 16 Pin 5 SW Pin 15 EN1 Pin 6 V IN Pin 7 V C Pin 14 IN BYP C Pin 8 LDO2 Pin 13 SETMIC2800 Typical Application Circuit (simplified) DDR2 MIC2800-G1JS L1 2.2 H VIN SW VDDIO DDR VIN = VIN LDO 5V typ 10 F 2.2 F C1 SGND 4.7 F SAMA5D2 PGND MPU Enable EN2 LDO1 VDD CORE 10 F BIAS CBIAS 100 nF LDO2 VDD IO 10 F C RC BYP C BYP delay 100 nF EN1 C SET C POR nRST SET 10 nF /LOWQ GPIO Functional Diagram DS20005839A-page 2 2017 Microchip Technology Inc.