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Microchip Technology MIC26601YJL-TR
- Part No.:
- MIC26601YJL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 28-PowerVQFN
- Datasheet:
-
MIC26601YJL-TR.pdf
- Description:
- IC REG BUCK ADJ 6A 28QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC26601YJL-TR from Micrel is a synchronous step-down DC/DC buck regulator with adaptive on-time control, delivering up to 6A output current across 4.5V–28V input and adjustable 0.8V–5.5V output. It features Hyper Speed Control™ architecture, ±1% feedback accuracy, 600kHz switching frequency, and integrated 5V VDD/PVDD LDOs - deployed in communications infrastructure power rails and embedded systems requiring fast transient response.
For engineers reviewing the MIC26601YJL-TR datasheet, MIC26601YJL-TR pinout, MIC26601YJL-TR application, or MIC26601YJL-TR equivalent, key selection criteria include its 28-pin MLF® package, internal current-sense capability (no external resistor), hiccup-mode short-circuit protection, pre-biased startup support, and Any Capacitor™ stability with zero-to-high ESR output capacitors.
Technical Context
The MIC26601YJL-TR implements an adaptive on-time control architecture that estimates tON as VOUT/VIN × (1/600kHz), enabling fixed-frequency operation while retaining fast load-transient response. Its valley-based OFF-time termination uses feedback voltage ripple sensing - eliminating slope compensation and supporting low-ESR capacitor compatibility via optional ripple injection.
It integrates dual internal MOSFETs (RDS(ON) = 42mΩ high-side, 12.5mΩ low-side), a 5V internal LDO for gate drive (VDD/PVDD), and a dedicated current-sense path via the low-side FET's RDS(ON). Protection includes foldback current limit, thermal shutdown at 160°C, undervoltage lockout, and open-drain Power Good (PG) with 92% VOUT threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports wide-range industrial and telecom inputs including 12V, 24V, and PoE-derived rails. |
| Output Current | Up to 6A continuous - sufficient for FPGA core, ASIC I/O, or multi-rail SoC power domains without external current sharing. |
| Output Voltage Range | Adjustable 0.8V to 5.5V - enables direct regulation of DDR3/4, ARM cores, PCIe, and analog subsystems. |
| Feedback Accuracy | ±1% over 0°C–85°C - ensures tight regulation for voltage-sensitive logic and memory interfaces. |
| Switching Frequency | 600kHz nominal - balances efficiency, EMI, and inductor size; varies <±150kHz with VIN/VOUT and temperature. |
| Package | 28-pin 5mm × 6mm MLF® - thermally enhanced exposed-pad QFN with 28°C/W θJA on 5-in² 4-layer PCB. |
| Protection Features | Foldback current limit, hiccup-mode short-circuit, thermal shutdown, UVLO, soft-start - enables robust self-protected operation in unattended systems. |
Pinout & Package
28-pin 5mm × 6mm MLF® (exposed thermal pad) package with 0.5mm pitch; requires solder paste stencil design per Amkor MicroLeadFrame guidelines and thermal via array under exposed pad.
| 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; tied to PVIN if VIN < 5.5V. |
| SW (Pins 4,9–12) | Switch node | High-dI/dt node connecting internal HS-FET source and LS-FET drain; requires short, low-inductance routing away from sensitive traces. |
| PGND (Pins 2,5–8,21) | Power ground return | Carries full converter switching current; must form compact, low-impedance loop with input/output caps and SW node. |
| PVIN (Pins 13–19) | Main input power connection | Accepts 4.5V–28V; multiple pins reduce IR drop and improve thermal conduction to PCB copper. |
| BST (Pin 20) | Bootstrap supply for high-side driver | Requires 0.1µF ceramic cap to SW; Schottky diode from PVDD to BST enables charge recycling. |
| CS (Pin 22) | Current sense input | Monitors LS-FET RDS(ON) during OFF-time; Kelvin connection to SW required for accurate foldback limit. |
| SGND (Pin 23) | Signal ground reference | Separate from PGND; connects only to FB, EN, PG, and VDD bypass - prevents noise coupling into control loop. |
| FB (Pin 24) | Feedback input | Regulated to 0.8V; resistor divider sets output voltage; 50nA bias current 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 ≥1.8V enables regulation; shutdown draws only 5µA. |
| VIN (Pin 27) | Analog supply input | Bypassed to SGND with 1µF ceramic; powers internal bias circuitry and error amplifier. |
| VDD (Pin 28) | Internal 5V LDO output for IC core | Supplies control logic and gate drivers; decoupled with 1.0µF ceramic to PGND; tied to PVIN if VIN < 5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Hyper Speed Control™ architecture | Enables stable 28V→0.8V conversion with <10µs load-step recovery and reduced output capacitance (e.g., 2× 22µF instead of 10× 47µF). |
| Any Capacitor™ stability | Operates with ceramic, polymer, or electrolytic output caps regardless of ESR - eliminates need for ESR-tuning networks. |
| No external compensation | Internally compensated control loop - removes 3–5 external components (RC network, op-amp) and associated layout sensitivity. |
| Pre-biased load startup | Safely ramps output from non-zero initial voltage - critical for hot-swap and rail-sequencing applications without output voltage reversal. |
| Integrated gate drivers & LDOs | Eliminates need for external 5V bias supply and discrete high-side driver ICs - reduces BOM count and board area by ~30%. |
Applications
| Distributed Power Systems | Communications Infrastructure |
|---|---|
Use Scenario: Point-of-load regulation in 48V intermediate bus architectures for base station RF modules and optical line cards. IC Role / Device Role / Timing Role: Primary buck regulator converting 48V-derived 12V/5V rails to sub-1V FPGA core voltages with <5% droop under 4A step load. Use Value: Hyper Speed Control™ achieves <15µs recovery time and supports ultra-low-ESR ceramic caps, reducing total output capacitance by 60% vs. conventional controllers. |
Use Scenario: Powering Ethernet switch ASICs and PHYs in enterprise routers and layer-3 switches with strict ripple and sequencing requirements. IC Role / Device Role / Timing Role: Secondary-stage regulator delivering 1.2V/3A and 3.3V/2A from a shared 5V intermediate rail. Use Value: Pre-biased startup and hiccup-mode protection prevent latch-up during hot-plug insertion and cable fault events. |
| Set-Top Box & Gateways | Printers & Graphic Cards |
Use Scenario: Multi-rail power delivery for ARM-based media processors, DDR3 memory, and HDMI PHYs in residential gateways. IC Role / Device Role / Timing Role: High-efficiency 1.1V/4A core regulator with soft-start ramp rate matched to system boot firmware timing. Use Value: 95% peak efficiency at 12V input reduces thermal load in sealed enclosures; ±1% accuracy maintains processor stability across temperature. |
Use Scenario: Compact DC/DC solution for stepper motor drivers and GPU memory interfaces in multifunction printers and entry-level graphics cards. IC Role / Device Role / Timing Role: 1.8V/6A supply for GDDR5 memory subsystems requiring fast transient response to burst data transfers. Use Value: 600kHz switching allows use of small 1.0µH shielded inductors; MLF® package enables dense placement near memory banks. |
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 rated, 2MHz switching, no internal LDOs - requires external 5V bias for gate drive. | Limited to lower-current applications; unsuitable for 6A loads or high-VIN (>17V) without derating. | Select when board space is constrained and 3A output suffices; avoid for 28V input or pre-biased startup needs. |
| TPS54620RGYT (Texas Instruments) | 6A, 2.2MHz, D-CAP2 control, integrated 5V LDO - but requires external bootstrap diode and lacks hiccup-mode protection. | Higher-frequency operation increases EMI filtering complexity; no built-in short-circuit foldback. | Prefer for high-density designs needing faster switching; verify external protection circuitry for short-circuit robustness. |
Compared with MP2451DT-LF-Z and TPS54620RGYT, the MIC26601YJL-TR uniquely combines 6A capability, 28V input tolerance, Hyper Speed Control™ for sub-20µs transients, and hiccup-mode protection - making it optimal for ruggedized telecom and industrial POL where reliability trumps raw frequency.
Availability
MIC26601YJL-TR is available at Aetrix Electronics and suitable for distributed power systems, communications infrastructure, and set-top box designs requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for MIC26601YJL-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 power management semiconductor company founded in 1978 and acquired by Microchip Technology in 2015. Known for high-performance DC/DC regulators and timing solutions.
The MIC26601YJL-TR belongs to Micrel's SuperSwitcher II™ family, engineered specifically for high-input-voltage, high-transient-response point-of-load applications in networking, computing, and industrial equipment.
FAQ
What is the maximum input voltage rating for the MIC26601YJL-TR?
The MIC26601YJL-TR has an absolute maximum PVIN-to-PGND rating of +29V, with recommended operating input range of 4.5V to 28V. Exceeding 28V may trigger overvoltage stress on internal MOSFETs and gate drivers, and is not guaranteed for continuous operation per datasheet specifications. Always maintain margin below 29V in system design.
Does the MIC26601YJL-TR require external compensation components?
No, the MIC26601YJL-TR features an internally compensated control loop. Its adaptive on-time architecture eliminates the need for external Type-II or Type-III compensation networks, reducing BOM count and layout sensitivity. Only standard input/output capacitors, inductor, and feedback resistors are required for basic operation.
How does the MIC26601YJL-TR achieve stability with low-ESR ceramic capacitors?
The MIC26601YJL-TR uses Hyper Speed Control™ with valley-based feedback ripple sensing. When low-ESR ceramics yield insufficient ripple, the datasheet recommends injecting 20–100mVpp ripple at the FB pin using a resistor-capacitor network - ensuring reliable ON-time triggering without slope compensation or external current-sense resistors.
Can the MIC26601YJL-TR safely start up into a pre-biased output?
Yes, the MIC26601YJL-TR explicitly supports safe startup into a pre-biased load. Its control logic prevents reverse current flow during startup by disabling the high-side MOSFET until the internal reference ramps up, avoiding output voltage collapse or inrush damage - confirmed in Functional Description section of the datasheet.
What thermal performance can be expected from the MIC26601YJL-TR in a standard PCB layout?
On a 5-square-inch, 4-layer FR-4 PCB with 2oz copper and thermal vias under the exposed pad, the MIC26601YJL-TR achieves θJA = 28°C/W. At 6A output and 12V input, typical die temperature rise is ~45°C above ambient - well within the −40°C to +125°C junction range, provided airflow or heatsinking meets system thermal targets.
MIC26601YJL-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:
- 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)
MIC26601YJL-TR FAQ
1.How can I place an order for MIC26601YJL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC26601YJL-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 MIC26601YJL-TR reliable?
The price and inventory of MIC26601YJL-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC26601YJL-TR is usually 5 days.
3.What payment methods are accepted for MIC26601YJL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC26601YJL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC26601YJL-TR?
MIC26601YJL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC26601YJL-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 MIC26601YJL-TR?
For technical support, including MIC26601YJL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC26601YJL-TR requirements.
6.How does Aetrix verify that MIC26601YJL-TR is sourced from the original manufacturer or authorized distributors?
All MIC26601YJL-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 MIC26601YJL-TR meets industry standards.
7.What is the process for return or replacement of MIC26601YJL-TR?
All MIC26601YJL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC26601YJL-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 MIC26601YJL-TR part is unused and in its original packaging.
Return procedure for MIC26601YJL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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