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Microchip MIC21LV32 | Demoboard EV71S00A
36V, Dual Phase Advanced COT Controller For Multiphase Operation
Overview
| Topology | Buck Converter |
| Input voltage | 4.5-36 V |
| Switching frequency | 100-1000 kHz |
| IC revision | 1 |
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 1MHz per phase.
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
- 100kHz to 1MHz 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 5mm x 5 mm 32-Pin VQFN Package
Typical applications
- Printers, Scanners, Graphic Cards and Video Cards
- Communications/Networking Infrastructure
- FPGA, CPU, MEM, GPU Core Supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | W(mm) | H(mm) | To | Tl(mm) | Pins | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | Ceramic Type | L(mm) | Fl(mm) | Packaging | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Material | Endurance(h) | IRIPPLE(mA) | ILeak(µA) | Pitch(mm) | Ø D(mm) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 50 V(DC), 0.8 mm, 0.8 mm | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Width0.8 mm | Height0.8 mm | – | – | – | Capacitance100 pF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), 0.8 mm, 0.8 mm | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Width0.8 mm | Height0.8 mm | – | – | – | Capacitance1 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), 1.6 mm, 0.8 mm | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | Width1.6 mm | Height0.8 mm | – | – | – | Capacitance100 nF | Capacitance±10% | Rated Voltage25 V (DC) | Size1206 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor3.5 % | Insulation Resistance5 GΩ | Ceramic TypeX7R Class II | Length3.2 mm | Pad Dimension0.6 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 16 V(DC), 2.5 mm, 2.5 mm | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 16 V(DC) | Width2.5 mm | Height2.5 mm | – | – | – | Capacitance47 µF | Capacitance±20% | Rated Voltage16 V (DC) | Size1210 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.002 GΩ | Ceramic TypeX5R Class II | Length3.2 mm | Pad Dimension0.75 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | |||||
 | WP-THRSH REDCUBE THR with external thread, 10 mm, 10.5 mm | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWP-THRSH REDCUBE THR with external thread | Width10 mm | Height10.5 mm | Outer ThreadM5 | Thread Length7 mm | Pins9 | – | – | – | – | Operating Temperature -55 °C up to +150 °C | – | – | – | – | – | PackagingTape and Reel | – | – | – | – | – | – | MaterialBrass | – | – | – | – | – | |||
 | WE-HCI SMT Flat Wire High Current Inductor, 10.2 mm, 4.7 mm | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Width10.2 mm | Height4.7 mm | – | – | Pins2 | – | – | – | Size1050 | Operating Temperature -40 °C up to +100 °C | – | – | – | Length10.5 mm | – | – | Inductance0.4 µH | Performance Rated Current55.7 A | Saturation Current @ 10%18 A | Saturation Current @ 30%37 A | DC Resistance0.67 mΩ | Self Resonant Frequency160 MHz | MaterialSuperflux | – | – | – | – | – | ||||
 | WCAP-ATLI Aluminum Electrolytic Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ATLI Aluminum Electrolytic Capacitors | – | – | – | – | – | Capacitance330 µF | Capacitance±20% | Rated Voltage35 V (DC) | – | – | Dissipation Factor9 % | – | – | Length20 mm | – | PackagingAmmopack | – | – | – | – | – | – | – | Endurance 3000 | Ripple Current1210 mA | Leakage Current115.5 µA | Pitch3.5 mm | Diameter8 mm |