My Inquiry
My Account
Microchip Technology MIC24056YJL-TR
- Part No.:
- MIC24056YJL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 28-PowerVQFN
- Datasheet:
-
MIC24056YJL-TR.pdf
- Description:
- IC REG BUCK ADJ 12A 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,005
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC24056YJL-TR from Micrel is a synchronous step-down DC/DC buck regulator with adaptive on-time control, operating from 4.5V to 19V input and delivering up to 12A output current at adjustable 0.8V–5.5V. It integrates dual N-channel MOSFETs (13mΩ high-side, 5.3mΩ low-side), features 600kHz fixed-frequency operation in CCM, HyperLight Load® architecture for >80% efficiency at 10mA, and power-good (PG) signaling. It is used in server VRMs and telecom base station POL converters.
For engineers reviewing the MIC24056YJL-TR datasheet, MIC24056YJL-TR pinout, MIC24056YJL-TR application, or MIC24056YJL-TR equivalent, key selection criteria include its 28-pin 5mm × 6mm QFN package, ±1% FB reference accuracy, internal 5V LDO for gate drive, hiccup-mode short-circuit protection, and compatibility with zero-to-high-ESR output capacitors.
Technical Context
The MIC24056YJL-TR implements adaptive on-time control with a fixed 600kHz nominal switching frequency in continuous conduction mode (CCM), using internal voltage-mode feedback referenced to a 0.8V FB pin. Its control loop senses output voltage ripple-not inductor current-to trigger ON-time pulses, eliminating slope compensation while maintaining stability across wide VIN/VOUT ratios (e.g., 19V→0.8V).
In light-load conditions, it transitions autonomously to discontinuous conduction mode (DCM) via zero-cross detection on the low-side MOSFET, reducing quiescent current to ~450µA and sustaining >80% efficiency at 10mA. Protection includes foldback current limiting (21A typ.), thermal shutdown at 160°C, undervoltage lockout on VDD (4.2V rising threshold), and safe startup into pre-biased outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 19V - supports 5V, 12V, and 19V intermediate bus systems without external regulators. |
| Output Current | Up to 12A - sufficient for CPU/GPU core rails and ASIC point-of-load applications. |
| Output Voltage Range | Adjustable 0.8V to 5.5V - covers DDR memory, FPGA I/O, and processor core voltages. |
| Switching Frequency | 600kHz (±25%) - enables compact magnetics and predictable EMI filtering design. |
| FB Reference Accuracy | ±1% (0°C to 85°C) - ensures tight output regulation under varying load and temperature. |
| Peak Efficiency | Up to 95% - achieved at mid-load with 12V input and 1.8V/12A output, minimizing thermal stress. |
| Quiescent Current | 450–750µA (non-switching) - enables low-power standby modes in always-on systems. |
| Thermal Resistance | θJA = 28°C/W - requires minimal PCB copper area for thermal management at full load. |
Pinout & Package
Package: 28-pin, 5mm × 6mm QFN with exposed thermal pad (JL suffix). Pin pitch is 0.5mm; PGND and PVIN pins are multi-pad for high-current routing and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVDD (Pin 1) | Internal 5V LDO output for high-side gate drive | Must be decoupled with 2.2µF ceramic to PGND; ties to PVIN if VIN < 5.5V. |
| PGND (Pins 2,5–8,21) | Power ground return path | Carries high di/dt currents from both MOSFETs and input/output caps; requires dedicated low-inductance plane. |
| SW (Pins 4,9–12) | Switch node connection | High dv/dt node; must be routed short and away from sensitive analog traces (FB, CS, PG). |
| PVIN (Pins 13–19) | Main input power rail (4.5–19V) | Multiple pins reduce IR drop and improve thermal spreading; bypassed locally to PGND. |
| BST (Pin 20) | Bootstrap capacitor connection | Requires 0.1µF ceramic between BST and SW; Schottky diode from PVDD to BST enables high-side drive. |
| CS (Pin 22) | Current sense input | Monitors low-side MOSFET RDS(ON) during OFF-time for cycle-by-cycle current limiting-no external sense resistor needed. |
| FB (Pin 24) | Feedback input | Regulated to 0.8V; sets output via resistor divider; ±1% accuracy enables precise voltage setting. |
| PG (Pin 25) | Open-drain power-good signal | Asserts high when VOUT > 92% of nominal; requires external pull-up to VDD for sequencing. |
| EN (Pin 26) | Enable control input | CMOS-compatible; logic high enables converter; shutdown current <10µA reduces system standby loss. |
| VIN (Pin 27) | Analog supply input | Bypassed with 1µF ceramic to SGND; powers internal bias circuits and error amplifier. |
| VDD (Pin 28) | Internal 5V LDO output for IC core | Supplies control logic and gate drivers; tied to PVIN if VIN < 5.5V; decoupled with 1µF ceramic to SGND. |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load® architecture | Enables >80% efficiency at 10mA by auto-transitioning to DCM-critical for idle-state power savings in servers. |
| Any Capacitor™ stability | Operates stably with ceramic, polymer, or electrolytic output caps regardless of ESR-eliminates need for specific cap types. |
| Adaptive on-time control | Delivers fast transient response (<10µs recovery) and inherent line/load regulation without external compensation. |
| Integrated MOSFETs | 13mΩ/5.3mΩ RDS(ON) pair minimizes conduction loss and simplifies layout-no external FETs or drivers required. |
| Hiccup-mode short-circuit protection | Shuts down and retries after fault-prevents thermal runaway during sustained overloads or board shorts. |
| Safe start-up into pre-biased loads | Prevents reverse current flow during hot-insertion or multi-rail sequencing-protects downstream circuitry. |
Applications
| Server Core Voltage Regulation | Telecom Base Station POL |
|---|---|
Use Scenario: Providing tightly regulated 0.85V/12A core voltage to high-performance Xeon or AMD EPYC processors in 1U rack servers. IC Role / Device Role / Timing Role: Primary synchronous buck controller with integrated power stage, managing dynamic load steps up to 6A/µs. Use Value: Hyper Speed Control architecture delivers <100mV droop under 8A step load, enabling smaller output capacitance and lower BOM cost. | Use Scenario: Generating 3.3V/8A supply for RF transceiver FPGAs and ADC/DAC signal chains in 5G macro base stations. IC Role / Device Role / Timing Role: Point-of-load regulator with PG signaling for system-level power sequencing and fault reporting. Use Value: ±1% FB accuracy and 600kHz switching ensure stable low-noise supply meeting 3GPP spectral mask requirements. |
| Rugged Industrial Router Power | Workstation GPU Memory Rail |
Use Scenario: Delivering 1.2V/10A to network processor SoCs in outdoor telecom routers operating from -40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-reliability buck regulator with thermal shutdown (160°C) and wide junction temp range (-40°C to +125°C). Use Value: 28°C/W θJA allows full 12A operation on standard 4-layer FR-4 without heatsinks-reducing mechanical complexity. | Use Scenario: Supplying 1.35V GDDR6 memory on high-end CAD workstations requiring low-noise, high-transient-response power. IC Role / Device Role / Timing Role: Secondary buck regulator synchronized to GPU clock domain for noise-sensitive analog supply domains. Use Value: Any Capacitor™ support permits use of ultra-low-ESR 0402 ceramic arrays, achieving <5mV p-p ripple at 100MHz bandwidth. |
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, 2MHz switching, no integrated high-side FET driver bootstrap; requires external bootstrap diode and capacitor. | Targeted at space-constrained low-power apps (e.g., IoT edge nodes); lacks PG, hiccup protection, and HyperLight Load. | Select only for sub-3A designs where size trumps efficiency and protection robustness. |
| TPS546B24RVFR | 12A, 4.5–18V input, PMBus interface, 500kHz–2MHz programmable frequency, integrated telemetry (VOUT, IOUT, temp). | Used in programmable power systems requiring digital monitoring and margining; higher cost and complexity than MIC24056YJL-TR. | Choose when digital control, telemetry, or dynamic voltage scaling are required-otherwise MIC24056YJL-TR offers simpler analog implementation. |
Compared with MP2451DT-LF-Z and TPS546B24RVFR, the MIC24056YJL-TR provides superior light-load efficiency via HyperLight Load®, eliminates external bootstrap components, and delivers proven 12A performance in a mature, cost-optimized QFN package-making it ideal for fixed-function, high-reliability analog POL designs.
Availability
MIC24056YJL-TR is available at Aetrix Electronics and suitable for server VRMs, telecom base station POL supplies, and industrial router power systems requiring stable component supply, long-lifecycle support, and Pb-free RoHS compliance.
Supply support for MIC24056YJL-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
Micrel Inc. was a U.S.-based analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015. It specialized in power management, timing, and interface ICs for communications and industrial markets.
The MIC24056YJL-TR belongs to Micrel's SuperSwitcher II™ family of high-current synchronous buck regulators, designed specifically for high-efficiency, high-density point-of-load conversion in datacenter and telecom infrastructure where thermal performance and transient response are critical.
FAQ
What is the maximum output current capability of the MIC24056YJL-TR?
The MIC24056YJL-TR delivers up to 12A of continuous output current under typical thermal conditions (θJA = 28°C/W, 5-layer PCB). Its internal MOSFETs have RDS(ON) values of 13mΩ (high-side) and 5.3mΩ (low-side), enabling this rating with proper layout and airflow. Derating applies above 85°C ambient or with reduced copper area.
Does the MIC24056YJL-TR require an external current sense resistor?
No, the MIC24056YJL-TR does not require an external current sense resistor. It uses the RDS(ON) of its internal low-side MOSFET to sense inductor current during the OFF-time, enabling cycle-by-cycle current limiting and hiccup-mode short-circuit protection without added BOM cost or board space.
How does the MIC24056YJL-TR achieve high efficiency at light loads?
The MIC24056YJL-TR achieves high light-load efficiency via HyperLight Load® architecture: it automatically transitions from continuous conduction mode (CCM) to discontinuous conduction mode (DCM) when output current drops below ~1A. In DCM, non-essential circuits power down, reducing quiescent current to ~450µA and sustaining >80% efficiency at 10mA.
Can the MIC24056YJL-TR start up safely into a pre-biased output?
Yes, the MIC24056YJL-TR supports safe start-up into pre-biased outputs. Its control architecture prevents reverse current flow during enable, avoiding potential damage to downstream components or instability in multi-rail systems-a key requirement for hot-swap and modular power architectures.
What is the purpose of the BST pin on the MIC24056YJL-TR?
The BST (bootstrap) pin on the MIC24056YJL-TR provides the floating supply voltage for the high-side N-channel MOSFET gate driver. A 0.1µF capacitor between BST and SW, plus a Schottky diode from PVDD to BST, forms the charge pump that maintains gate drive voltage during high-side conduction-enabling efficient synchronous rectification without external high-voltage drivers.
MIC24056YJL-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:
- Active
- 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:
- 12A
- 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)
MIC24056YJL-TR FAQ
1.How can I place an order for MIC24056YJL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC24056YJL-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 MIC24056YJL-TR reliable?
The price and inventory of MIC24056YJL-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC24056YJL-TR is usually 5 days.
3.What payment methods are accepted for MIC24056YJL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC24056YJL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC24056YJL-TR?
MIC24056YJL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC24056YJL-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 MIC24056YJL-TR?
For technical support, including MIC24056YJL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC24056YJL-TR requirements.
6.How does Aetrix verify that MIC24056YJL-TR is sourced from the original manufacturer or authorized distributors?
All MIC24056YJL-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 MIC24056YJL-TR meets industry standards.
7.What is the process for return or replacement of MIC24056YJL-TR?
All MIC24056YJL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC24056YJL-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 MIC24056YJL-TR part is unused and in its original packaging.
Return procedure for MIC24056YJL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC24056YJL-TR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
