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Microchip Technology MIC26603YJL-TR
- Part No.:
- MIC26603YJL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 28-PowerVQFN
- Datasheet:
-
MIC26603YJL-TR.pdf
- Description:
- IC REG BUCK ADJ 6A 28QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC26603YJL-TR from Micrel is a 28V, 6A synchronous DC/DC buck regulator with adaptive on-time control, Hyper Light Load™ architecture, and integrated 5V linear regulator. It operates from 4.5V–28V input, delivers adjustable output down to 0.8V, and maintains up to 95% efficiency at full load while sustaining ~80% efficiency at 10mA light load - ideal for telecom power rails and GPU core supplies.
For engineers reviewing the MIC26603YJL-TR datasheet, MIC26603YJL-TR pinout, MIC26603YJL-TR application, or MIC26603YJL-TR equivalent, this page provides verified pin functions, thermal derating curves, Hyper Speed Control™ transient response behavior, PG threshold accuracy (±3%), and confirmed 5mm × 6mm MLF®-28 package compatibility with PCB layout guidelines for PVIN/PGND separation.
Technical Context
The MIC26603YJL-TR uses adaptive on-time control with fixed 600kHz nominal switching frequency in continuous-conduction mode and transitions to variable-frequency discontinuous mode under light loads. Its zero-cross comparator monitors low-side MOSFET voltage during OFF-time to detect inductor current zero crossing and enable Hyper Light Load™ operation.
It integrates dual internal N-channel MOSFETs (RDS(ON) = 42mΩ high-side, 12.5mΩ low-side), eliminates external current-sense resistors via RDS(ON)-based foldback current limiting (7.5–17A range), and implements digital soft-start with 5ms ramp time using a 0.8V reference that steps in 9.7mV increments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports 12V/24V industrial and telecom bus rails without external pre-regulation. |
| Output Current | Up to 6A continuous - sufficient for FPGA I/O banks or ASIC core logic with margin at 125°C junction. |
| Output Voltage Range | Adjustable 0.8V to 5.5V - enables direct regulation of DDR3/DDR4 VDDQ (1.5V/1.35V) or PCIe 3.3V rails. |
| Feedback Accuracy | ±1% at 0°C–85°C - ensures stable 1.0V CPU core voltage within ±10mV tolerance across temperature. |
| Switching Frequency | 600kHz nominal - allows compact 2.2µH inductors and reduces EMI filter size vs. lower-frequency alternatives. |
| Quiescent Current | 450–750µA - enables >80% efficiency at 10mA load, critical for always-on management subsystems. |
| Thermal Shutdown | 160°C with 15°C hysteresis - protects against sustained overload in enclosed telecom chassis. |
| Power Good Threshold | 92% of VOUT with 5.5% hysteresis - provides reliable sequencing signal for downstream FPGAs or processors. |
Pinout & Package
Package: 28-pin 5mm × 6mm MLF® (exposed thermal pad), RoHS-compliant Pb-free finish, rated for −40°C to +125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVDD (Pin 1) | Internal LDO output for gate drive | Supplies high-side MOSFET driver; requires 2.2µF ceramic cap to PGND; tie to PVIN if VIN < 5.5V. |
| SW (Pins 4,9–12) | Switch node | Connects high-side source and low-side drain; high dv/dt node requiring short, isolated routing away from analog traces. |
| PGND (Pins 2,5–8,21) | Power ground return | Carries full 6A switch current; must form tight loop with input/output capacitors and be separated from SGND plane. |
| PVIN (Pins 13–19) | Main input power connection | Accepts 4.5V–26V; multiple pins reduce IR drop and thermal resistance; bypass with low-ESR ceramics near package. |
| BST (Pin 20) | Bootstrap supply for high-side driver | Requires 0.1µF capacitor to SW and Schottky diode from PVDD; resistor here slows high-side turn-on to reduce EMI. |
| CS (Pin 22) | Current sense input | Monitors low-side MOSFET VDS during OFF-time for foldback protection; Kelvin connection required for accuracy. |
| FB (Pin 24) | Voltage feedback input | Regulated to 0.8V ±1%; sets output via resistor divider; sensitive to noise - route away from SW and PGND loops. |
| PG (Pin 25) | Open-drain Power Good | Asserts high when VOUT ≥ 92% nominal; requires external pull-up to VDD (>10kΩ); used for system power sequencing. |
| EN (Pin 26) | Enable control input | CMOS-compatible; logic high enables converter (IEN ≤ 30µA); must not float - tie to VDD or controller GPIO. |
| VIN (Pin 27) | Control circuit supply input | Bypass with 1.0µF ceramic to SGND; powers internal logic; internal LDO derives VDD from VIN when VIN ≥ 5.5V. |
| VDD (Pin 28) | Internal 5V regulator output | Supplies control circuitry; 4.8–5.4V output at 40mA; tie to PVIN if VIN < 5.5V; bypass with 1.0µF ceramic to SGND. |
Key Features
| Feature | Design Value |
|---|---|
| Hyper Light Load™ architecture | Maintains ~80% efficiency at 10mA by entering discontinuous mode and reducing bias currents - extends battery life in standby states. |
| Hyper Speed Control™ topology | Enables high VIN/VOUT ratios (e.g., 24V→0.8V) with minimal output capacitance - reduces BOM cost and board area vs. conventional buck controllers. |
| Any Capacitor™ stability | Stable with zero-to-high ESR output capacitors - eliminates need for specific low-ESR tantalum or polymer types; supports ceramic-only designs. |
| Integrated power MOSFETs | 42mΩ high-side / 12.5mΩ low-side RDS(ON) - achieves 95% peak efficiency at 6A without external FETs or drivers. |
| Safe start-up into pre-biased loads | Prevents reverse current flow during hot-plug events - protects downstream circuits when VOUT is already charged before enable. |
| "Hiccup mode" short-circuit protection | Shuts down after overcurrent detection, waits, then retries - limits average power dissipation during sustained shorts and avoids thermal runaway. |
Applications
| Telecom Line Cards | GPU Core Power |
|---|---|
|
Use Scenario: Regulating 12V backplane to 0.9V/1.0V for ASICs on carrier-grade line cards operating in -40°C to +85°C environments. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering up to 6A with precise 0.8V reference and ±1% FB accuracy for stable core voltage. Use Value: Hyper Light Load™ sustains >75% efficiency at 20mA idle current, reducing system heat and enabling fanless designs in dense chassis. |
Use Scenario: Supplying dynamic core voltage to discrete graphics processing units in workstations and gaming PCs with rapid load transients. IC Role / Device Role / Timing Role: Adaptive on-time buck controller with 600kHz switching and fast transient response (<10µs recovery) for GPU DVFS scaling. Use Value: Hyper Speed Control™ enables 24V→0.9V conversion with only 22µF total output capacitance, minimizing footprint and cost. |
| Industrial PLC I/O Modules | Network Switch ASIC Rails |
|
Use Scenario: Generating isolated 3.3V and 5V rails from 24V DC field bus in programmable logic controllers with strict EMC requirements. IC Role / Device Role / Timing Role: High-efficiency buck regulator with integrated MOSFETs and PG output for safe power sequencing with microcontrollers. Use Value: Any Capacitor™ stability allows use of low-cost X7R ceramics instead of expensive polymer caps, simplifying procurement and qualification. |
Use Scenario: Powering multi-core network switch ASICs requiring tightly regulated 1.2V/1.8V rails with fast load-step response in 1U rack systems. IC Role / Device Role / Timing Role: Synchronous buck regulator with 5mm × 6mm MLF® package and exposed thermal pad for efficient heat transfer to heatsink. Use Value: Thermal derating curve confirms 6A capability at 70°C ambient - meets airflow-limited thermal budgets in high-port-density switches. |
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 | 36V input, 0.8A output, external MOSFETs required; no integrated PG or Hyper Light Load™ mode. | Limited to low-current auxiliary rails; lacks light-load efficiency optimization and sequencing support. | Select when cost sensitivity outweighs efficiency needs and output current < 1A. |
| TPS54620RGYT | 17V input, 6A output, 2.5MHz switching, integrated compensation; no discontinuous-mode light-load optimization. | Better for space-constrained designs needing higher frequency; quiescent current 1.8mA - 3.6× higher than MIC26603YJL-TR. | Select when PCB area is critical and light-load efficiency is secondary to transient speed. |
Compared with MP2451DT-LF-Z and TPS54620RGYT, the MIC26603YJL-TR uniquely combines 28V input rating, 6A integrated power stage, Hyper Light Load™ efficiency below 10mA, and PG output - making it optimal for telecom and industrial systems requiring wide VIN, high current, and ultra-low standby power.
Availability
MIC26603YJL-TR is available at Aetrix Electronics and suitable for telecom infrastructure, GPU power delivery, and industrial PLC I/O modules requiring stable component supply with long lifecycle assurance.
Supply support for MIC26603YJL-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; known for high-performance power management and timing solutions.
The MIC26603YJL-TR belongs to Micrel's SuperSwitcher II™ family, designed specifically for high-efficiency, high-current DC/DC conversion in space- and thermally-constrained telecom and computing applications.
FAQ
What is the maximum input voltage supported by the MIC26603YJL-TR?
The MIC26603YJL-TR supports an absolute maximum PVIN voltage of +29V, with recommended continuous operation up to 28V. Its 4.5V–28V input range enables direct use with 24V industrial buses and 12V telecom distribution systems without pre-regulation. Exceeding 28V risks violating the 29V absolute maximum rating and may trigger overvoltage shutdown.
Does the MIC26603YJL-TR require external current-sense resistors?
No, the MIC26603YJL-TR does not require external current-sense resistors. It implements RDS(ON)-based current sensing using its internal low-side MOSFET (12.5mΩ typical), enabling foldback current limiting and hiccup-mode short-circuit protection while saving board space and eliminating associated power loss.
How does the MIC26603YJL-TR achieve high light-load efficiency?
The MIC26603YJL-TR achieves high light-load efficiency via Hyper Light Load™ architecture: it transitions from fixed-frequency continuous conduction mode to variable-frequency discontinuous mode when load drops below ~200mA, reducing bias currents to ~450µA and maintaining ~80% efficiency at 10mA output current.
What is the purpose of the BST pin on the MIC26603YJL-TR?
The BST pin on the MIC26603YJL-TR supplies bootstrapped voltage to the high-side N-channel MOSFET gate driver. It requires a 0.1µF capacitor between BST and SW, plus a Schottky diode from PVDD to BST. Adding a small series resistor slows high-side turn-on, reducing EMI and preventing shoot-through during switching transitions.
Can the MIC26603YJL-TR start up into a pre-biased output?
Yes, the MIC26603YJL-TR supports safe start-up into pre-biased outputs. Its control architecture prevents reverse current flow during enable, protecting downstream components when the output capacitor is already charged - a critical feature for hot-swap and redundant power systems where MIC26603YJL-TR is commonly deployed.
MIC26603YJL-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®, SuperSwitcher IIG™
- 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)
MIC26603YJL-TR FAQ
1.How can I place an order for MIC26603YJL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC26603YJL-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 MIC26603YJL-TR reliable?
The price and inventory of MIC26603YJL-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC26603YJL-TR is usually 5 days.
3.What payment methods are accepted for MIC26603YJL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC26603YJL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC26603YJL-TR?
MIC26603YJL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC26603YJL-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 MIC26603YJL-TR?
For technical support, including MIC26603YJL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC26603YJL-TR requirements.
6.How does Aetrix verify that MIC26603YJL-TR is sourced from the original manufacturer or authorized distributors?
All MIC26603YJL-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 MIC26603YJL-TR meets industry standards.
7.What is the process for return or replacement of MIC26603YJL-TR?
All MIC26603YJL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC26603YJL-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 MIC26603YJL-TR part is unused and in its original packaging.
Return procedure for MIC26603YJL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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