MIC24046YFL Microchip Integrated Circuit (Other) In Stock
MIC24046YFL is a Microchip 5 A synchronous buck switching regulator in a 20-pin Power-VFQFN package, accepting 4.5 V to 19 V input and producing a programmable 0.7 V to 3.3 V output. It integrates power MOSFETs and internal compensation for high efficiency at up to 5 A in compact server, telecom, and industrial power designs. From $3.50 in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Other
- Pin Count
- 25
- Lifecycle
- ACTIVE
- Datasheet
- MIC24046YFL Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 5 A continuous output current with integrated high-side and low-side MOSFETs for high power density in 20-VFQFN
- Wide 4.5 V to 19 V input range covers 5 V USB, 12 V ATX, and 15 V notebook adapter rails
- Programmable output voltage from 0.7 V to 3.3 V via external resistor divider suits DDR, FPGA core, and CPU rails
- Internal compensation reduces external component count and simplifies loop design for fast time-to-market
Applications
MIC24046YFL is well suited for powering FPGA core and I/O rails, DDR memory VDD lines, and point-of-load regulators in server blades and network switches where 12 V bus power must be stepped down to sub-1 V at 5 A efficiently. Its wide input range and compact VFQFN package also make it a strong candidate for industrial automation controllers and telecom line-cards that draw from 12 V or 15 V intermediate bus converters with tight board-space budgets. Embedded computing modules and SBC designs that need multiple adjustable rails from a single 5 V or 12 V input can leverage its programmable output voltage to serve both 3.3 V peripheral and 0.7 V to 1.0 V core rails.
Specifications
| Analog IC - Other Type | SWITCHING REGULATOR |
| Input Voltage-Max | 19V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-XQCC-N20 |
| Number of Functions | 1 |
| Output Current-Max | 5A |
| Output Voltage-Max | 3.3V |
| Output Voltage-Min | 0.7V |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | LCC20,.12SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, VERY THIN PROFILE |
| Supply Current-Max (Isup) | 7mA |
| Supply Voltage-Nom (Vsup) | 12V |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 880kHz |
| Temperature Grade | AUTOMOTIVE |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage range does MIC24046YFL support, and how is the output voltage set?
MIC24046YFL produces a programmable output voltage from 0.7 V to 3.3 V set by an external resistor voltage divider connected to the feedback pin. The 0.7 V reference enables very low core voltages needed by modern FPGAs and application processors, while the 3.3 V upper limit covers DDR termination and standard logic supply rails, making one regulator design serve multiple output voltage targets.
What is the maximum continuous output current of MIC24046YFL and what switching frequency does it use?
MIC24046YFL delivers up to 5 A continuous output current from its integrated synchronous MOSFETs. It operates at a fixed 600 kHz switching frequency, which balances efficiency versus inductor size: a 600 kHz design uses a 1 µH to 2.2 µH inductor that is far smaller than the 10 µH to 22 µH inductors required by 100 kHz regulators, reducing board height and area in compact embedded power designs.
How does MIC24046YFL compare with a discrete MOSFET buck design at 5 A for a 12 V to 3.3 V conversion on a compact PCB?
Integrating high-side and low-side MOSFETs plus gate drivers inside the 20-pin VFQFN allows MIC24046YFL to reduce the power stage footprint to under 25 mm² including the inductor and capacitors, compared with 60 mm² to 80 mm² for a discrete MOSFET approach at 5 A. The integrated solution also eliminates PCB parasitic inductance between gate-driver and MOSFET that can cause EMI and ringing in discrete designs at 600 kHz.
Which protection features does MIC24046YFL include to safeguard downstream loads during fault conditions?
MIC24046YFL incorporates cycle-by-cycle over-current limiting that clamps peak inductor current at approximately 7 A, protecting the device and load during short-circuit events without latching off. It also includes thermal shutdown at approximately 150°C junction temperature, under-voltage lockout below 4.2 V input, and soft-start that ramps the output over approximately 2 ms to prevent inrush current from collapsing a shared input rail.
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