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MIC21LV32 Datasheet(PDF) 1 Page - Microchip Technology

Part No. MIC21LV32
Description  36V Dual Phase, Advanced COT Buck Controller Stackable for Multiphase Operation
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MIC21LV32 Datasheet(HTML) 1 Page - Microchip Technology

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 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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