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Microchip Technology MIC261201YJL-TR
- Part No.:
- MIC261201YJL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 28-PowerVQFN
- Datasheet:
-
MIC261201YJL-TR.pdf
- Description:
- IC REG BUCK ADJ 12A 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,166
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Product details
Overview
MIC261201YJL-TR from Micrel is a synchronous DC/DC buck regulator with adaptive on-time control, delivering up to 12A output current across 4.5V–28V input and adjustable 0.8V–5.5V output. It features ±1% feedback accuracy, 600kHz switching frequency, Hyper Speed Control™ architecture for fast transient response, and operates in a 28-pin 5mm × 6mm MLF® package. It is used in high-density power conversion for communications infrastructure and embedded systems.
For engineers reviewing the MIC261201YJL-TR datasheet, MIC261201YJL-TR pinout, MIC261201YJL-TR application, or MIC261201YJL-TR equivalent, key selection criteria include input voltage range (4.5V–28V), output current capability (12A), feedback reference accuracy (±1%), thermal shutdown threshold (160°C), and compatibility with low-ESR or zero-ESR output capacitors via Any Capacitor® stability.
Technical Context
The MIC261201YJL-TR implements an adaptive on-time control architecture that combines fixed-frequency operation (600kHz nominal) with ultra-fast load transient response by sensing output voltage ripple-eliminating need for slope compensation or external current-sense resistors. Its internal 5V LDO supplies gate drive (VDD/PVDD) and logic, while BST bootstrapping enables high-side N-MOSFET drive.
Protection mechanisms include foldback current limiting (18.75A–33A threshold), hiccup-mode short-circuit response, undervoltage lockout on VDD (3.7V–4.5V), thermal shutdown at 160°C with 15°C hysteresis, and open-drain Power Good (PG) output asserting at 92% of nominal VOUT. It supports safe startup into pre-biased loads and requires no external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports wide industrial and telecom supply rails without external pre-regulation |
| Output Current | Up to 12A continuous - enables single-chip point-of-load regulation for FPGA, ASIC, and DSP cores |
| Output Voltage Range | Adjustable 0.8V to 5.5V - covers core, I/O, and auxiliary rail requirements with single device |
| Feedback Accuracy | ±1% over –40°C to +125°C - ensures tight regulation under thermal stress in enclosed systems |
| Switching Frequency | 600kHz (typ.) - balances EMI, efficiency, and inductor size; stable across line/load/temperature |
| Internal FET RDS(on) | Top: 13mΩ, Bottom: 5.3mΩ - reduces conduction loss and improves full-load efficiency up to 95% |
| Thermal Shutdown | 160°C junction with 15°C hysteresis - prevents latch-up during sustained overload or poor airflow |
Pinout & Package
Package: 28-pin 5mm × 6mm MLF® (exposed thermal pad), RoHS-compliant Pb-free finish. Thermal resistance θJA = 28°C/W on standard 4-layer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVDD (Pin 1) | Internal 5V LDO output for gate drive | Supplies high-side driver; must be decoupled with 2.2µF ceramic to PGND; tie to PVIN if VIN < 5.5V |
| SW (Pins 4,9–12) | Switch node | High dv/dt connection between internal MOSFETs; requires short, isolated routing away from sensitive analog nodes |
| PGND (Pins 2,5–8,21) | Power ground return | Carries high-current return path for both MOSFETs and input/output capacitors; must be low-inductance polygon |
| PVIN (Pins 13–19) | Main power input (4.5V–28V) | Distributed input pins reduce IR drop; requires local ceramic input capacitance to PGND |
| BST (Pin 20) | Bootstrap supply for high-side driver | Connected via Schottky diode to PVDD and 0.1µF capacitor to SW; optional series resistor slows turn-on |
| CS (Pin 22) | Current sense input | Monitors low-side MOSFET RDS(on) during OFF-time for foldback protection; requires Kelvin connection to SW |
| SGND (Pin 23) | Signal ground reference | Separate from PGND; connects to control circuitry and FB/EN/PG; must not share top-layer trace with PGND |
| FB (Pin 24) | Feedback input | Regulated to 0.8V reference; sets output via resistor divider; bias current <50nA minimizes divider error |
| PG (Pin 25) | Open-drain Power Good | Asserts high when VOUT > 92% of target; requires external pull-up ≥10kΩ to VDD |
| EN (Pin 26) | Enable control input | CMOS-compatible; logic high enables, low shuts down (IQ ≈ 5µA); must not float |
| VIN (Pin 27) | Logic supply input | Bypassed to SGND; powers internal logic and soft-start circuitry; independent of PVIN |
| VDD (Pin 28) | Internal 5V LDO output | Supplies IC core and gate drivers; decoupled with 1.0µF ceramic to PGND; tie to PVIN if VIN < 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Hyper Speed Control™ architecture | Enables stable operation at extreme VIN/VOUT ratios (e.g., 28V→0.8V) with minimal output capacitance and no external compensation |
| Any Capacitor® stability | Operates stably with zero-to-high ESR output capacitors - eliminates ESR dependency and simplifies capacitor selection |
| Integrated power FETs | 13mΩ high-side and 5.3mΩ low-side N-MOSFETs - eliminate external switch losses and reduce BOM count |
| Pre-biased startup support | Allows safe enable into existing output voltage - critical for hot-swap and multi-rail sequencing applications |
| Adaptive soft-start | 5ms internal digital ramp (9.7mV steps) - limits inrush current without external timing components |
| Open-drain Power Good (PG) | Monitors regulated output with 92% threshold and 100µs delay - provides reliable system power sequencing signal |
Applications
| Telecom Point-of-Load | Industrial CPU Core Supply |
|---|---|
Use Scenario: Regulating 12V or 24V backplane to 1.0V–1.8V for high-performance baseband processors in 5G remote radio units. IC Role / Device Role / Timing Role: Primary synchronous buck controller providing tightly regulated core voltage with fast transient response to burst-mode processing loads. Use Value: Hyper Speed Control™ maintains <±1% regulation during 8A step transients, reducing required output capacitance by 40% vs. conventional controllers. |
Use Scenario: Powering ARM Cortex-A series CPUs in programmable logic controllers (PLCs) operating in extended temperature environments (–40°C to +85°C). IC Role / Device Role / Timing Role: Single-chip 12A buck regulator delivering 1.2V core rail with integrated thermal protection and pre-biased startup. Use Value: ±1% feedback accuracy and 160°C thermal shutdown ensure reliable operation under industrial ambient extremes and partial airflow blockage. |
| Networking Switch ASIC Supply | Embedded GPU Memory Rail |
Use Scenario: Generating 0.85V/10A supply for 10G Ethernet switch ASICs in compact fanless switches. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with 600kHz switching to minimize magnetics size and meet EMI Class B limits. Use Value: 95% peak efficiency at 12V input/0.85V output reduces thermal load in sealed chassis, enabling passive cooling. |
Use Scenario: Delivering 1.35V/12A to GDDR6 memory subsystems in edge AI inference modules with strict power integrity requirements. IC Role / Device Role / Timing Role: Low-noise, high-bandwidth buck regulator supporting rapid memory access bursts and deep sleep state transitions. Use Value: Adaptive on-time control achieves <50µs recovery from 8A load steps, preventing memory read errors during dynamic workloads. |
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 (Monolithic Power) | 3A max output, 2MHz switching, no integrated bootstrap diode; requires external high-side driver components | Suitable only for sub-5A loads; lacks hiccup-mode protection and pre-biased startup | Select when board space is constrained and output current ≤3A; not drop-in for MIC261201YJL-TR's 12A capability |
| TPS54620RGYT (Texas Instruments) | 6A max output, 2.2MHz, D-CAP2 control, integrated MOSFETs but smaller 4mm × 4mm QFN | Limited to 6A; higher quiescent current (1.8mA vs. 0.73mA); no Any Capacitor® stability guarantee | Choose for higher-frequency designs where 6A suffices and footprint reduction outweighs loss of 12A headroom and ESR flexibility |
Compared with MP2451DT-LF-Z and TPS54620RGYT, the MIC261201YJL-TR delivers double the current rating, supports wider VIN/VOUT ratios, guarantees stability with any capacitor type, and includes robust fault handling (hiccup mode, pre-bias startup, ±1% accuracy) essential for mission-critical embedded power rails.
Availability
MIC261201YJL-TR is available at Aetrix Electronics and suitable for distributed power systems, communications infrastructure, and industrial embedded computing requiring stable component supply and long-term lifecycle support.
Supply support for MIC261201YJL-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 semiconductor company specializing in power management, timing, and interface ICs before its acquisition by Microchip Technology in 2015. Known for innovation in adaptive control architectures and high-efficiency DC/DC solutions.
The MIC261201YJL-TR belongs to Micrel's SuperSwitcher II™ family, designed specifically for high-current, wide-input-voltage point-of-load regulation in space-constrained telecom and industrial equipment where thermal performance and transient response are critical.
FAQ
What is the maximum supported input voltage for the MIC261201YJL-TR?
The MIC261201YJL-TR supports an absolute maximum PVIN voltage of +29V, with recommended continuous operation from 4.5V to 28V. Exceeding 28V may trigger internal overvoltage protection or degrade reliability. The device's Hyper Speed Control™ architecture remains stable even at the 28V-to-0.8V extreme ratio, making it suitable for 24V industrial bus applications.
Does the MIC261201YJL-TR require external compensation components?
No, the MIC261201YJL-TR does not require external compensation components. Its adaptive on-time control architecture with internal ripple sensing eliminates the need for loop compensation networks. This simplifies design, reduces BOM count, and ensures stability across all supported output capacitor types-including zero-ESR ceramics-as validated by Micrel's Any Capacitor® certification.
How does the MIC261201YJL-TR handle short-circuit conditions?
The MIC261201YJL-TR uses foldback current limiting and "hiccup mode" short-circuit protection. When current exceeds ~26A (at 25°C), it disables switching, initiates soft-start restart after a delay, and repeats until fault clears. This limits average power dissipation and prevents thermal runaway. The CS pin monitors low-side RDS(on), avoiding external sense resistors.
Can the MIC261201YJL-TR start up into a pre-biased output?
Yes, the MIC261201YJL-TR supports safe startup into a pre-biased output voltage. Its control architecture prevents reverse current flow through internal MOSFETs during enable, eliminating risk of output voltage collapse or inrush damage. This feature is essential for hot-swap systems and multi-rail power sequencing where downstream rails may already be active.
What is the purpose of the BST pin on the MIC261201YJL-TR?
The BST (bootstrap) pin on the MIC261201YJL-TR supplies gate drive voltage to the internal high-side N-MOSFET. It connects via a Schottky diode to PVDD and a 0.1µF capacitor to SW. During low-side conduction, the capacitor charges; during high-side conduction, it floats to provide ~5V gate drive above SW potential. A small series resistor can be added to control turn-on slew rate.
MIC261201YJL-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):
- 28V
- 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)
MIC261201YJL-TR FAQ
1.How can I place an order for MIC261201YJL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC261201YJL-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 MIC261201YJL-TR reliable?
The price and inventory of MIC261201YJL-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC261201YJL-TR is usually 5 days.
3.What payment methods are accepted for MIC261201YJL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC261201YJL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC261201YJL-TR?
MIC261201YJL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC261201YJL-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 MIC261201YJL-TR?
For technical support, including MIC261201YJL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC261201YJL-TR requirements.
6.How does Aetrix verify that MIC261201YJL-TR is sourced from the original manufacturer or authorized distributors?
All MIC261201YJL-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 MIC261201YJL-TR meets industry standards.
7.What is the process for return or replacement of MIC261201YJL-TR?
All MIC261201YJL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC261201YJL-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 MIC261201YJL-TR part is unused and in its original packaging.
Return procedure for MIC261201YJL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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