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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 | 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) | Operating Temperature | IRIPPLE (mA) | ILeak (µA) | Pitch (mm) | Ø D (mm) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 885012206077 | SPEC | 8 files | WCAP-CSGP MLCCs 50 V(DC) | 0.8 | 0.8 | – | – | – | 100 pF | ±10% | 50 | 0603 | -55 °C up to +125 °C | 2.5 | 10 GΩ | X7R Class II | 1.6 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012206083 | SPEC | 8 files | WCAP-CSGP MLCCs 50 V(DC) | 0.8 | 0.8 | – | – | – | 1 nF | ±10% | 50 | 0603 | -55 °C up to +125 °C | 2.5 | 10 GΩ | X7R Class II | 1.6 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012208058 | SPEC | 8 files | WCAP-CSGP MLCCs 25 V(DC) | 1.6 | 0.8 | – | – | – | 100 nF | ±10% | 25 | 1206 | -55 °C up to +125 °C | 3.5 | 5 GΩ | X7R Class II | 3.2 | 0.6 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012109011 | SPEC | 8 files | WCAP-CSGP MLCCs 16 V(DC) | 2.5 | 2.5 | – | – | – | 47 µF | ±20% | 16 | 1210 | -55 °C up to +85 °C | 10 | 0.002 GΩ | X5R Class II | 3.2 | 0.75 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 74651195R | SPEC | – | 6 files | WP-THRSH REDCUBE THR with external thread | 10 | 10.5 | M5 | 7 | 9 | – | – | – | – | -55 °C up to +150 °C | – | – | – | – | – | Tape and Reel | – | – | – | – | – | – | Brass | – | – | – | – | – | – | |
 | 744325040 | SPEC | 8 files | WE-HCI SMT Flat Wire High Current Inductor | 10.2 | 4.7 | – | – | 2 | – | – | – | 1050 | -40 °C up to +100 °C | – | – | – | 10.5 | – | – | 0.4 | 55.7 | 18 | 37 | 0.67 | 160 | Superflux | – | -40 °C up to +150 °C | – | – | – | – | ||
 | 860080574014 | SPEC | 7 files | WCAP-ATLI Aluminum Electrolytic Capacitors | – | – | – | – | – | 330 µF | ±20% | 35 | – | – | 9 | – | – | 20 | – | Ammopack | – | – | – | – | – | – | – | 3000 | -55 °C up to +105 °C | 1210 | 115.5 | 3.5 | 8 |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 885012206077 | SPEC | |
| 885012206083 | SPEC | |
| 885012208058 | SPEC | |
| 885012109011 | SPEC | |
| 74651195R | SPEC | – |
| 744325040 | SPEC | |
| 860080574014 | SPEC |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | 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) | Operating Temperature | IRIPPLE (mA) | ILeak (µA) | Pitch (mm) | Ø D (mm) | Samples |
|---|