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Microchip MIC21LV33 | Demoboard EV93M52A MIC21LV33 Evaluation Board
36V Dual Phase, Advanced COT Buck Controller with HyperLight Load® and Phase Shedding
Overview
| Topology | Buck Converter |
| Input voltage | 4.5-36 V |
| Output 1 | 28 V / 50 A |
Description
The MIC21LV33 is a constant on-time, dual phase, synchronous buck controller featuring a unique adaptive on-time control architecture with Hyper Light Load® and phase shedding features enabled. The MIC21LV33 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 100kHz to 1MHz per phase. The Hyper Speed Control® architecture supports ultrafast 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 MIC21LV33 has a remote sense amplifier for accurate output voltage control. The MIC21LV33 offers a full suite of protection features to ensure protection of the IC during Fault conditions. These include under voltage lockout to ensure proper operation under power sag conditions, programmable soft start to reduce inrush current, overvoltage discharge, Hiccup mode short-circuit protection and thermal shutdown. The MIC21LV33 is available in a 32-pin 5 mm x 5 mm VQFN package with a -40°C to +125°C junction operating temperature range.
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
- Ripple Injection from Third Node Allows Greater than 50% Duty Cycles
- Hyper Light Load® and Automatic Phase Shedding
- Ability to Interface with External MCU
- Accurate Current Balancing Between Phases
- Accurate 180° Phasing of Outputs
- 100kHz to 1MHz Switching Frequency per Phase
- High-Voltage Internal 5V LDO for Single-Supply Operation
- 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 5mmx5mm 32-Pin VQFN Package
Typical applications
- Distributed Power Systems, FPGA, CPU, MEM, GPU Core Supplies
- Printers, Scanners, Graphic Cards and Video Cards
- Communications/Networking Infrastructure
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | W (mm) | H (mm) | To | Tl (mm) | Pins | C | VR (V (DC)) | Size | Operating Temperature | DF (%) | RISO | L (mm) | Fl (mm) | Ceramic Type | Packaging | Tol. C | Operating Temperature | Qmin. | Q (%) | 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 885012006032 | SPEC | 8 files | WCAP-CSGP MLCCs 25 V(DC) | 0.8 | 0.8 | – | – | – | 10 pF | 25 | 0603 | -55 °C up to +125 °C | – | 10 GΩ | 1.6 | 0.4 | NP0 Class I | 7" Tape & Reel | ±5% | – | – | 600 | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012206046 | SPEC | 8 files | WCAP-CSGP MLCCs 16 V(DC) | 0.8 | 0.8 | – | – | – | 100 nF | 16 | 0603 | -55 °C up to +125 °C | 3.5 | 5 GΩ | 1.6 | 0.4 | X7R Class II | 7" Tape & Reel | ±10% | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012206077 | SPEC | 8 files | WCAP-CSGP MLCCs 50 V(DC) | 0.8 | 0.8 | – | – | – | 100 pF | 50 | 0603 | -55 °C up to +125 °C | 2.5 | 10 GΩ | 1.6 | 0.4 | X7R Class II | 7" Tape & Reel | ±10% | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012206083 | SPEC | 8 files | WCAP-CSGP MLCCs 50 V(DC) | 0.8 | 0.8 | – | – | – | 1 nF | 50 | 0603 | -55 °C up to +125 °C | 2.5 | 10 GΩ | 1.6 | 0.4 | X7R Class II | 7" Tape & Reel | ±10% | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012206086 | SPEC | 8 files | WCAP-CSGP MLCCs 50 V(DC) | 0.8 | 0.8 | – | – | – | 3.3 nF | 50 | 0603 | -55 °C up to +125 °C | 2.5 | 10 GΩ | 1.6 | 0.4 | X7R Class II | 7" Tape & Reel | ±10% | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012206120 | SPEC | 6 files | WCAP-CSGP MLCCs 100 V(DC) | 0.8 | 0.8 | – | – | – | 100 nF | 100 | 0603 | -55 °C up to +125 °C | 5 | 1 GΩ | 1.6 | 0.4 | X7R Class II | 7" Tape & Reel | ±10% | -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 885382206002 | SPEC | 6 files | WCAP-CSST Soft Termination | 0.8 | 0.8 | – | – | – | 10 nF | 50 | 0603 | -55 °C up to +125 °C | 2.5 | 10 GΩ | 1.6 | 0.4 | X7R Class II | 7" Tape & Reel | ±10% | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 885342007001 | SPEC | 7 files | WCAP-CSMH Mid and High Voltage | 1.25 | 1.25 | – | – | – | 220 pF | 200 | 0805 | -55 °C up to +125 °C | – | 10 GΩ | 2 | 0.5 | NP0 Class I | 7" Tape & Reel | ±5% | -55 °C up to +125 °C | 1000 | 1000 | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012208058 | SPEC | 8 files | WCAP-CSGP MLCCs 25 V(DC) | 1.6 | 0.8 | – | – | – | 100 nF | 25 | 1206 | -55 °C up to +125 °C | 3.5 | 5 GΩ | 3.2 | 0.6 | X7R Class II | 7" Tape & Reel | ±10% | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012109011 | SPEC | 8 files | WCAP-CSGP MLCCs 16 V(DC) | 2.5 | 2.5 | – | – | – | 47 µF | 16 | 1210 | -55 °C up to +85 °C | 10 | 0.002 GΩ | 3.2 | 0.75 | X5R Class II | 7" Tape & Reel | ±20% | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 74651173R | SPEC | – | 6 files | WP-THRSH REDCUBE THR with external thread | 7 | 8.5 | M3 | 5 | 4 | – | – | – | -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 | – | – | – | – | -40 °C up to +150 °C | – | – | 0.4 | 55.7 | 18 | 37 | 0.67 | 160 | Superflux | – | – | – | – | – | ||
 | 860080574014 | SPEC | 7 files | WCAP-ATLI Aluminum Electrolytic Capacitors | – | – | – | – | – | 330 µF | 35 | – | – | 9 | – | 20 | – | – | Ammopack | ±20% | -55 °C up to +105 °C | – | – | – | – | – | – | – | – | – | 3000 | 1210 | 115.5 | 3.5 | 8 |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Product series | W (mm) | H (mm) | To | Tl (mm) | Pins | C | VR (V (DC)) | Size | Operating Temperature | DF (%) | RISO | L (mm) | Fl (mm) | Ceramic Type | Packaging | Tol. C | Operating Temperature | Qmin. | Q (%) | 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 |
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