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Microchip Technology MIC23451-AAAYFL-T5
- Part No.:
- MIC23451-AAAYFL-T5
- Manufacturer:
- Microchip Technology
- Package:
- 26-VFQFN Exposed Pad
- Datasheet:
-
MIC23451-AAAYFL-T5.pdf
- Description:
- IC REG BUCK ADJ 2A TRPL 26QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,672
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Product details
Overview
MIC23451-AAAYFL-T5 from Microchip Technology is a triple-channel synchronous buck regulator IC delivering three independent 2A outputs with HyperLight Load® operation, 3 MHz PWM switching, and 93% peak efficiency - designed for powering µC/FPGA core rails in space-constrained SSDs and high-performance servers.
For engineers reviewing the MIC23451-AAAYFL-T5 datasheet, MIC23451-AAAYFL-T5 pinout, MIC23451-AAAYFL-T5 application, or MIC23451-AAAYFL-T5 equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and efficiency behavior across load ranges, and real-world alternative selection guidance for multi-rail POL designs.
Technical Context
The MIC23451-AAAYFL-T5 integrates three fully independent buck regulators sharing a single 2.7V–5.5V input supply but operating with separate enable (EN1/2/3), feedback (FB1/2/3), sense (SNS1/2/3), and power good (PG1/2/3) controls. Each channel uses proprietary HyperLight Load® architecture to switch between discontinuous PFM mode at light loads (≤1 mA) and fixed-frequency 3 MHz PWM mode above ~130 mA.
Its control loop employs minimum on/off time regulation with internal PMOS/NMOS synchronous switches, achieving ultra-fast transient response (<10 µs recovery from 10 mA→1 A step) and low output ripple (5 mVPP in full PWM, 30 mVPP in HyperLight Load). Input voltage sensing (AVIN/PVIN separation) and dedicated analog ground (AGND) routing ensure noise immunity for precision feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single 3.3 V or 5 V rail input without pre-regulation. |
| Output Current per Channel | 2 A continuous - enables direct core powering of modern FPGAs and multi-core µCs. |
| Switching Frequency | 3 MHz nominal - allows use of sub-1 µH inductors (down to 0.47 µH) and compact 2.2 µF ceramic output caps. |
| Peak Efficiency | 93% - minimizes thermal load in dense server/SSD PCB layouts with limited airflow. |
| Quiescent Current | 24 µA per channel - extends battery life in always-on subsystems and enables low-power standby modes. |
| Output Voltage Range | 1.0 V to 3.3 V - covers standard I/O and core voltages for ARM, RISC-V, and FPGA applications. |
| Junction Temperature Range | –40°C to +125°C - qualified for industrial and extended-temperature embedded systems. |
| Package | 26-lead 4 mm × 4 mm FQFN (FL) - exposes EP pads for thermal enhancement; footprint compatible with automated reflow. |
Pinout & Package
26-lead 4 mm × 4 mm FQFN (FL) package with exposed thermal pads (EP1, EP2); requires solder paste stencil design for optimal thermal transfer and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1 / SW2 / SW3 | Switch Node Output | High-speed power switch output per channel; connects directly to inductor; must be routed short and away from sensitive analog traces. |
| EN1 / EN2 / EN3 | Enable Input | Logic-level control (0.5–1.2 V threshold) for independent channel startup/shutdown; not floating-tolerant. |
| SNS1 / SNS2 / SNS3 | Voltage Sense Input | Connects to VOUT near output capacitor for accurate remote sensing; rejects PCB IR drop. |
| FB1 / FB2 / FB3 | Feedback Input | Compares divided output voltage against 0.62 V internal reference; sets VOUT via resistor divider (1 V–3.3 V range). |
| PG1 / PG2 / PG3 | Power Good Indicator | Open-drain output asserting when VOUT ≥ 90% of target; requires external pull-up to VOUT for sequencing logic. |
| PVIN1 / PVIN2 / PVIN3 | Power Input Supply | Supplies high-current MOSFETs; requires local 2.2–4.7 µF ceramic bypass to PGND per channel. |
| AVIN1 / AVIN2 / AVIN3 | Analog Input Supply | Powers control circuitry; decoupled with RC filter + 100 nF cap to AGND for noise immunity. |
| PGND / AGND | Ground Terminals | Separate power (PGND) and analog (AGND) grounds; must be connected externally with low-inductance trace. |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load® Mode | Enables >81% efficiency at 1 mA while maintaining <10 µs transient response - eliminates need for external LDOs in low-power states. |
| Three Independent Power Good Outputs | Per-channel open-drain PG signals allow precise power sequencing (e.g., EN1 → PG1 → EN2 → PG2 → EN3) without external logic. |
| Fully Integrated MOSFETs | Eliminates external high-side PMOS and low-side NMOS; reduces BOM count by 6 devices per channel and simplifies layout. |
| Ultra-Low Shutdown Current | 0.1 µA per channel shutdown current enables true zero-power sleep modes in battery-backed systems. |
| Thermal & Current Protection | Integrated overtemperature shutdown (160°C) and cycle-by-cycle current limiting (2.2–4.1 A peak) prevent damage under fault conditions. |
| Small Solution Size | Supports 0.47 µH inductors and 2.2 µF output capacitors - total solution height <1 mm and area <25 mm² per channel. |
Applications
| Solid State Drives (SSD) | µC/FPGA Core Power |
|---|---|
Use Scenario: Powering NAND controller, DRAM cache, and PCIe PHY rails in M.2/U.2 SSD modules with strict height and thermal limits. IC Role / Device Role / Timing Role: Triple-output POL regulator supplying 1.2 V (controller), 1.8 V (DRAM), and 3.3 V (PHY) simultaneously from 3.3 V input. Use Value: 3 MHz switching enables tiny 0.47 µH inductors and 2.2 µF caps - reducing total solution volume by >40% vs. 500 kHz alternatives. |
Use Scenario: Delivering tightly regulated core, I/O, and auxiliary voltages to multi-domain SoCs and Xilinx/Intel FPGAs in test equipment. IC Role / Device Role / Timing Role: Independent channel control allows staggered startup and dynamic voltage scaling (DVS) per domain. Use Value: Per-channel EN/PG pins enable hardware-based sequencing without microcontroller intervention - critical for deterministic boot timing. |
| Security/Surveillance Cameras | High-Performance Servers |
Use Scenario: Powering image sensor ISP, AI accelerator, and video encoder in edge AI cameras with intermittent processing bursts. IC Role / Device Role / Timing Role: HyperLight Load® maintains >80% efficiency at idle (1–10 mA) and transitions seamlessly to 3 MHz PWM during inference bursts (up to 2 A). Use Value: 24 µA quiescent current per channel extends battery runtime in wire-free deployments without sacrificing peak performance. |
Use Scenario: Providing point-of-load power to CPU VRM companion rails, memory buffers, and PCIe retimers in 1U rack servers. IC Role / Device Role / Timing Role: Three 2A channels replace discrete dual-buck + LDO solutions for DDR4/5 termination, PLL, and management ASIC supplies. Use Value: 93% peak efficiency and 20°C/W θJA reduce localized hot spots - enabling higher power density without forced-air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z (Monolithic Power Systems) | Single 2A output; no integrated PG; 2 MHz max frequency; requires external compensation. | Not suitable for simultaneous triple-rail generation; lacks independent enable/PG per channel. | Select only if system needs one high-efficiency 2A rail and space allows adding two more converters. |
| TPS543320RHLR (Texas Instruments) | Dual 3A outputs; 2.5 V–18 V input; 2.2 MHz; includes PMBus interface and telemetry; larger 32-pin QFN. | Higher input range and digital control suit industrial 12 V systems; over-specified for 3.3/5 V SSD/server use cases. | Prefer when telemetry, margining, or wider VIN range justifies added complexity and cost. |
Compared with MP2451DT-LF-Z and TPS543320RHLR, the MIC23451-AAAYFL-T5 uniquely delivers three independent 2A outputs in a 4 mm × 4 mm package with per-channel sequencing and HyperLight Load® efficiency - making it the only drop-in solution for compact, multi-rail 3.3 V/5 V POL applications requiring minimal external components.
Availability
MIC23451-AAAYFL-T5 is available at Aetrix Electronics and suitable for solid-state drives, FPGA-based test equipment, and security camera power systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for MIC23451-AAAYFL-T5 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs, with broad industrial, automotive, and computing market presence.
The MIC23451-AAAYFL-T5 belongs to Microchip's HyperLight Load® synchronous buck regulator product line, engineered specifically for high-density, low-profile point-of-load applications where light-load efficiency, fast transient response, and minimal external component count are critical.
FAQ
What is the maximum output voltage supported by the MIC23451-AAAYFL-T5?
The MIC23451-AAAYFL-T5 supports an output voltage range of 1.0 V to 3.3 V per channel, set via external resistor dividers connected to the FB1/2/3 pins. The internal reference voltage is 0.62 V, and Equation 4-1 in the datasheet defines the exact relationship between feedback resistors and VOUT. Operation outside this range is not guaranteed.
Does the MIC23451-AAAYFL-T5 require external compensation components?
No, the MIC23451-AAAYFL-T5 is internally compensated and designed to be stable with inductors from 0.47 µH to 2.2 µH and a 4.7 µF ceramic output capacitor (X5R/X7R). External compensation networks are unnecessary, reducing BOM count and layout complexity compared to adjustable controllers.
How does the HyperLight Load® mode improve efficiency at light loads?
HyperLight Load® mode uses pulse-frequency modulation (PFM) with fixed on-time and variable off-time to deliver energy only when needed. At loads below ~130 mA, this reduces switching losses and gate drive current, enabling 81% efficiency at 1 mA - far exceeding standard PWM-mode buck regulators at the same condition.
Can the MIC23451-AAAYFL-T5 operate with a 2.7 V input supply?
Yes, the MIC23451-AAAYFL-T5 is fully specified for operation from 2.7 V to 5.5 V input. Its undervoltage lockout (UVLO) turns on at 2.55 V typical and has 75 mV hysteresis, ensuring reliable startup and dropout behavior even at the lower end of the input range.
What thermal derating applies when all three channels deliver 2 A simultaneously?
At 2 A per channel and 25°C ambient, the MIC23451-AAAYFL-T5 dissipates approximately 0.6 W total. With θJA = 20°C/W, junction temperature rises ~12°C - well within the –40°C to +125°C rating. Derating begins above ~85°C ambient; Figure 2-19 in the datasheet shows max output current vs. temperature for 1/2/3 active channels.
MIC23451-AAAYFL-T5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 26-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 3
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 2A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 26-QFN (4x4)
MIC23451-AAAYFL-T5 FAQ
1.How can I place an order for MIC23451-AAAYFL-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23451-AAAYFL-T5 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 MIC23451-AAAYFL-T5 reliable?
The price and inventory of MIC23451-AAAYFL-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23451-AAAYFL-T5 is usually 5 days.
3.What payment methods are accepted for MIC23451-AAAYFL-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23451-AAAYFL-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23451-AAAYFL-T5?
MIC23451-AAAYFL-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23451-AAAYFL-T5 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 MIC23451-AAAYFL-T5?
For technical support, including MIC23451-AAAYFL-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23451-AAAYFL-T5 requirements.
6.How does Aetrix verify that MIC23451-AAAYFL-T5 is sourced from the original manufacturer or authorized distributors?
All MIC23451-AAAYFL-T5 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 MIC23451-AAAYFL-T5 meets industry standards.
7.What is the process for return or replacement of MIC23451-AAAYFL-T5?
All MIC23451-AAAYFL-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC23451-AAAYFL-T5, 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 MIC23451-AAAYFL-T5 part is unused and in its original packaging.
Return procedure for MIC23451-AAAYFL-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC23451-AAAYFL-T5 Tags
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