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Microchip Technology MIC24051YJL-TR
- Part No.:
- MIC24051YJL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 28-PowerVQFN
- Datasheet:
-
MIC24051YJL-TR.pdf
- Description:
- IC REG BUCK ADJ 6A 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,490
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Product details
Overview
MIC24051YJL-TR from Microchip Technology is a synchronous buck regulator with Hyper Speed Control® architecture, delivering up to 6A output current at adjustable 0.8V–5.5V from a 4.5V–19V input. It features ±1% feedback accuracy, 600 kHz fixed switching frequency, and operates across –40°C to +125°C junction temperature-designed for high-efficiency point-of-load regulation in telecom base stations and server VRMs.
For engineers reviewing the MIC24051YJL-TR datasheet, MIC24051YJL-TR pinout, MIC24051YJL-TR application, or MIC24051YJL-TR equivalent, key selection criteria include its no-external-compensation design, pre-biased start-up capability, foldback current-limit protection, and QFN-28 (5 mm × 6 mm) thermal performance with θJA = 28°C/W.
Technical Context
The MIC24051YJL-TR implements adaptive on-time control with fixed 600 kHz nominal frequency and mandatory 300 ns minimum off-time, enabling fast transient response without slope compensation. Its internal current sensing uses low-side MOSFET RDS(ON) (12.5 mΩ typ.) rather than external sense resistors, supporting hiccup-mode short-circuit protection and foldback current limiting down to 7.5 A at 25°C.
It integrates dual LDOs: VDD (5V ±0.2V, 40 mA capable) powers control circuitry, while PVDD (5V, gate-drive supply) is derived from VIN or tied to PVIN below 5.5V. Power Good (PG) asserts high when VOUT exceeds 92% of nominal, with 100 µs delay and 5.5% hysteresis-critical for system sequencing in multi-rail power architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 19V - supports wide-range industrial and telecom inputs including 12V and 18V rails. |
| Output Current | 6A continuous - sufficient for CPU/GPU core rails and FPGA I/O supplies without external current sharing. |
| Output Voltage Range | 0.8V to 5.5V adjustable - covers DDR memory, ASIC cores, and PCIe auxiliary rails via resistor divider on FB pin. |
| Feedback Accuracy | ±1% at 0°C to +85°C - ensures tight regulation for sensitive digital loads under varying thermal conditions. |
| Switching Frequency | 600 kHz (typ.) - balances EMI, inductor size, and efficiency; varies ±25% with VIN/VOUT and load per adaptive timing. |
| Junction Temp Range | –40°C to +125°C - qualified for extended-temperature industrial and telecom equipment operation. |
| Package Thermal θJA | 28°C/W - enables 2.5W dissipation on standard 4-layer PCB before exceeding 125°C TJ limit. |
Pinout & Package
Package: 28-pin QFN (5 mm × 6 mm, JL suffix), exposed thermal pad, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (Pins 13–19) | High-side MOSFET drain input | Primary power input path for buck stage; requires local 4.7 µF ×2 ceramic capacitors to PGND with minimal loop area. |
| SW (Pins 4,9–12) | Switch node | Connection between internal high-side source and low-side drain; high dv/dt node requiring tight routing away from analog signals. |
| PGND (Pins 2,5–8,15–18) | Power ground return | Low-impedance return for MOSFET sources, input/output caps, and gate drivers-must be separated from SGND plane. |
| FB (Pin 24) | Voltage feedback input | Senses output via resistor divider; regulated to 0.8V reference; ripple injection required if output cap ESR < 5 mΩ. |
| PG (Pin 25) | Open-drain Power Good | Asserts high when VOUT > 92% of setpoint; requires external 10 kΩ pull-up to VDD for system power sequencing. |
| EN (Pin 26) | Enable control | CMOS-compatible logic input (1.8V high threshold); pulls device into 5 µA shutdown state when low. |
Key Features
| Feature | Design Value |
|---|---|
| Hyper Speed Control® architecture | Enables stable operation at high VIN/VOUT ratios (e.g., 19V→0.8V) with <10 µF total output capacitance-reducing board space and cost. |
| No external compensation | Internal adaptive on-time loop eliminates need for compensation network, simplifying layout and reducing BOM count by ≥3 passive components. |
| Pre-biased start-up support | Allows safe turn-on into powered outputs (e.g., hot-swap systems), preventing reverse current flow through internal FETs during ramp-up. |
| Any-capacitor stability | Stable with zero-to-high ESR output capacitors-including polymer, MLCC, and electrolytic-eliminating capacitor selection constraints. |
| Hiccup-mode short-circuit protection | Enters periodic restart after overcurrent detection, limiting average power dissipation to <1 W during fault-preserving reliability in unattended systems. |
Applications
| Telecom Base Stations | Server Point-of-Load |
|---|---|
Use Scenario: Regulating 1.8V/6A for RF transceiver ASICs in 5G macro base stations with ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Primary synchronous buck converter providing tightly regulated core voltage with fast load-step response to handle burst-mode transmission. Use Value: Hyper Speed Control® reduces output capacitance by 60% vs. conventional controllers, shrinking DC/DC footprint by 35% in dense RF modules. | Use Scenario: Delivering 0.85V/6A to CPU cores in rack-mounted servers where thermal density exceeds 30 W/cm². IC Role / Device Role / Timing Role: High-current POL regulator with integrated gate drivers and thermal shutdown-enabling single-chip solution without discrete driver ICs. Use Value: 12.5 mΩ low-side RDS(ON) and 42 mΩ high-side RDS(ON) deliver >93% peak efficiency at 12V input, reducing heat sink requirements by 40%. |
| Routers & Switches | Industrial Control Units |
Use Scenario: Generating 3.3V/6A for packet processing ASICs in enterprise layer-3 switches operating 24/7 in temperature-controlled data closets. IC Role / Device Role / Timing Role: Main DC/DC controller with Power Good signaling to FPGA configuration logic for safe power sequencing. Use Value: ±1% feedback accuracy and 0.25% line/load regulation ensure consistent timing margins for 10 GbE SerDes interfaces across input voltage sags. | Use Scenario: Supplying 5.0V/4A to isolated I/O modules in programmable logic controllers exposed to –40°C cold starts and 125°C junction limits. IC Role / Device Role / Timing Role: Robust buck regulator with –40°C to +125°C qualification and hiccup-mode protection against field-induced short circuits. Use Value: Foldback current limit and thermal shutdown prevent latch-up during motor drive back-EMF transients, extending field lifetime beyond 15 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 3A max output, 2 MHz switching, no pre-bias start-up, requires external compensation. | Limited to lower-current applications; unsuitable for 6A server rails or pre-biased hot-swap systems. | Select only for cost-sensitive 3A designs where board space allows larger output caps and compensation network. |
| TPS546B24RVFT | 6A, PMBus-enabled, 400 kHz–2 MHz programmable frequency, requires external VDD bias and compensation. | Supports digital telemetry and dynamic voltage scaling-adds complexity for analog-only systems. | Choose when telemetry, remote margining, or multi-phase synchronization is required; avoid for simple fixed-output use cases. |
Compared with MP2451DT-LF-Z and TPS546B24RVFT, the MIC24051YJL-TR delivers higher current in a simpler analog-control package with built-in thermal management and no external compensation-making it optimal for high-reliability, space-constrained 6A POL applications where digital overhead is unnecessary.
Availability
MIC24051YJL-TR is available at Aetrix Electronics and suitable for telecom infrastructure, server power delivery, and industrial control units requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MIC24051YJL-TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with emphasis on industrial, automotive, and communications markets.
The MIC24051YJL-TR belongs to Microchip's HyperLight Load® synchronous buck regulator family, engineered for high-efficiency, high-transient-response point-of-load conversion in space- and thermally constrained systems.
FAQ
What is the maximum output current rating for the MIC24051YJL-TR?
The MIC24051YJL-TR is rated for 6A continuous output current under specified thermal conditions (θJA = 28°C/W, TA ≤ +85°C). Peak inductor current limit is 11A at 25°C, derating to 6.6A at +125°C junction temperature. Sustained 6A operation requires proper PCB copper area and airflow to maintain TJ ≤ +125°C as defined in DS20005658A-page 6.
Does the MIC24051YJL-TR support start-up into a pre-biased output?
Yes, the MIC24051YJL-TR supports safe start-up into a pre-biased output, as confirmed in the General Description and Figure 2-39 of DS20005658A. This feature prevents reverse current flow during hot-swap or multi-rail sequencing events by controlling high-side FET turn-on timing based on SW node voltage detection.
What package type and pin count does the MIC24051YJL-TR use?
The MIC24051YJL-TR uses a 28-pin QFN package measuring 5 mm × 6 mm with an exposed thermal pad (JL suffix per Microchip's ordering nomenclature). Pinout details-including 7 PVIN pins, 5 PGND pins, and dedicated BST, CS, and PG terminals-are fully documented in Table 3-1 of DS20005658A.
How does the MIC24051YJL-TR achieve stability without external compensation components?
The MIC24051YJL-TR achieves stability via its adaptive on-time control architecture with internal ripple injection and fixed 300 ns minimum off-time. This eliminates the need for external Type-II or Type-III compensation networks-verified across all output capacitor types (zero-to-high ESR) per "Any Capacitor Stable" claim in the Features section of DS20005658A.
What is the function of the CS pin on the MIC24051YJL-TR?
The CS pin on the MIC24051YJL-TR is the current sense input that monitors voltage across the internal low-side MOSFET during OFF-time to enable cycle-by-cycle overcurrent protection. As stated in Table 3-1 and Section 4.5, it provides foldback current limiting and hiccup-mode short-circuit response without requiring an external sense resistor.
MIC24051YJL-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- Hyper Speed Control®, SuperSwitcher II™
- Package/Case:
- 28-PowerVQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 19V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (5x6)
MIC24051YJL-TR FAQ
1.How can I place an order for MIC24051YJL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC24051YJL-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MIC24051YJL-TR reliable?
The price and inventory of MIC24051YJL-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC24051YJL-TR is usually 5 days.
3.What payment methods are accepted for MIC24051YJL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC24051YJL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC24051YJL-TR?
MIC24051YJL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC24051YJL-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MIC24051YJL-TR?
For technical support, including MIC24051YJL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC24051YJL-TR requirements.
6.How does Aetrix verify that MIC24051YJL-TR is sourced from the original manufacturer or authorized distributors?
All MIC24051YJL-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MIC24051YJL-TR meets industry standards.
7.What is the process for return or replacement of MIC24051YJL-TR?
All MIC24051YJL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC24051YJL-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MIC24051YJL-TR part is unused and in its original packaging.
Return procedure for MIC24051YJL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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