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MIC21LV32 Datasheet(PDF) 1 Page - Microchip Technology |
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MIC21LV32 Datasheet(HTML) 1 Page - Microchip Technology |
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1 / 50 page  2021 Microchip Technology Inc. DS20006513A-page 1 MIC21LV32 Features • Input Voltage Range: 4.5V to 36V • Input Down to 2V when VDD = 5V from External Supply • Adjustable Output Voltage from 0.6V to 28V • Adaptive Constant On-Time Control: - High DeltaV operation - Any Capacitor™ stable • 0.6V Internal Reference with ±1% Accuracy • ±0.5% Reference Accuracy for -40°C to 105°C • Novel Ripple Injection Method to Allow Greater than 50% Duty Cycle Operation • Operates in CCM, Stackable for Multiphase Operation up to Eight Phases • Accurate Current Balancing Between Phases • Accurate 180° Phasing of Outputs • 100 kHz to 1 MHz Switching Frequency per Phase • Secondary LDO to Improve System Efficiency • Supports Start-up to Pre-bias Output • Remote Sense Amplifier for Tight Output Regulation • Droop Feature to Support Adaptive Voltage Positioning (AVP) for Improved Load Transient Response • Precision Enable Function for Low Standby Current • External Programmable Soft Start to Reduce Inrush Current • Lossless RDSON Current Sensing with NTC Temperature Compensation or Resistor Sensing Method • Programmable Current Limit and Hiccup Mode Short-Circuit Protection • Thermal Shutdown with Hysteresis • -40°C to +125°C Junction Temperature Range • Compact Size 5 mm x 5 mm 32-Pin VQFN Package Applications • Distributed Power Systems • Communications/Networking Infrastructure • Printers, Scanners, Graphic Cards and Video Cards • FPGA, CPU, MEM, GPU Core Supplies General Description The MIC21LV32 is a constant on-time, dual phase synchronous buck controller featuring a unique adaptive on-time control architecture with stackable feature up to eight phases. The MIC21LV32 operates over an input supply range from 4.5V to 36V and can be used to supply up to 50A of output current. The output voltage is adjustable down to 0.6V with an ensured accuracy of ±1%. The device operates with programmable switching frequency from 100 kHz to 1 MHz per phase. The Hyper Speed Control® architecture supports ultra- fast transient response under medium to heavy loads. The soft start is also programmable externally with a capacitor, thus enabling safe start-ups into heavy loads. The MIC21LV32 has a remote sense amplifier for accurate output voltage control. The MIC21LV32 offers a full suite of protection features to ensure protection of the IC during Fault conditions. These include undervoltage lockout to ensure proper operation under power sag conditions, programmable soft start to reduce inrush current, Hiccup mode short-circuit protection and thermal shutdown. The MIC21LV32 is available in a 32-pin 5 mm x 5 mm VQFN package with a -40°C to +125°C junction operating temperature range. Package Type *Includes Exposed Thermal Pad (EP); see Table 3-1. MIC21LV32 32-Pin 5 mm X 5 mm VQFN* (ML) EN DH2 PGND SW2 DL2 ILIM CSH AGND EN DH2 PGND SW2 DL2 ILIM CSH AGND 36VDual Phase,Advanced COTBuck Controller Stackable for Multiphase Operation |
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