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Microchip Technology MIC23451-AAAYFL-TR
- Part No.:
- MIC23451-AAAYFL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 26-VFQFN Exposed Pad
- Datasheet:
-
MIC23451-AAAYFL-TR.pdf
- Description:
- IC REG BUCK ADJ 2A TRPL 26QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,302
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Product details
Overview
MIC23451-AAAYFL-TR 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 ultra-fast transient response-designed for powering µC/FPGA core rails in high-density SSDs and servers where low output ripple (5 mVPP in full PWM) and 81% efficiency at 1 mA are critical.
For engineers reviewing the MIC23451-AAAYFL-TR datasheet, MIC23451-AAAYFL-TR pinout, MIC23451-AAAYFL-TR application, or MIC23451-AAAYFL-TR equivalent, key selection factors include its 26-lead 4 mm × 4 mm FQFN package, per-channel 0.1 µA shutdown current, 0.62 V feedback reference, and independent EN/PG/SNS/FB pins enabling sequenced power-up and precise voltage monitoring across all three outputs.
Technical Context
The MIC23451-AAAYFL-TR implements a proprietary HyperLight Load® architecture combining fixed on-time pulse-frequency modulation (PFM) at light loads with continuous conduction mode (CCM) PWM at ≥130 mA per channel, maintaining 93% peak efficiency while achieving <30 mVPP ripple in HLL mode. Its control loop uses internal 0.62 V reference, integrated PMOS/NMOS switches, and per-channel error comparators with UVLO (2.55 V typ), thermal shutdown (160°C), and foldback current limit (2.3 A).
Each channel features independent analog and power input domains (AVIN/PVIN), separate AGND/PGND routing requirements, and open-drain PG outputs with 90% nominal threshold and 10% hysteresis-enabling robust sequencing and fault detection without external supervision circuitry.
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 with 6 V absolute max rating on PVIN/AVIN |
| Output Current per Channel | 2 A continuous - validated across –40°C to +125°C junction range with thermal derating curves for 1–3 active channels |
| Switching Frequency | 3 MHz (typ) in CCM - enables use of sub-1 µH inductors (0.47 µH min) and compact 2.2 µF ceramic output capacitors |
| Feedback Reference Voltage | 0.62 V (0.604–0.635 V) - sets output from 1 V to 3.3 V via resistor divider; stable over temperature (±0.5 mV drift from –40°C to +125°C) |
| Quiescent Current | 24 µA per channel - enables >81% efficiency at 1 mA load, critical for always-on subsystems in surveillance cameras and SSDs |
| Output Ripple | 5 mVPP in full PWM mode - achieved with 4.7 µF X5R/X7R output capacitor; no additional LC filtering required |
| Power Good Threshold | 90% of VOUT (83–96%) - open-drain PGx outputs assert after soft-start with 150 µs delay; 10% hysteresis prevents chatter |
| Shutdown Current | 0.1 µA per channel - allows individual channel disable via ENx without affecting others; total system standby <0.3 µA |
Pinout & Package
Package: 26-lead 4 mm × 4 mm FQFN (FL) with exposed thermal pads EP1/EP2; requires separate AGND and PGND planes per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1/SW2/SW3 (Pins 26,4,7) | Switch Node Output | Direct connection to inductor high-side; carries high di/dt PWM current-must be routed short and away from sensitive nodes |
| EN1/EN2/EN3 (Pins 21,19,15) | Enable Input | Logic-high (>0.9 V) activates channel; internal pull-down ensures safe default-off state; not floating |
| SNS1/SNS2/SNS3 (Pins 22,18,12) | Output Voltage Sense | Connected directly to VOUT near capacitor; provides regulation feedback independent of FB divider losses |
| FB1/FB2/FB3 (Pins 23,17,14) | Feedback Input | Compares divided VOUT against 0.62 V internal reference; sets output voltage per Equation 4-1 |
| PG1/PG2/PG3 (Pins 20,16,13) | Power Good Indicator | Open-drain output pulled up to VOUT; asserts high when VOUT ≥90% nominal-used for sequencing and fault reporting |
| AVIN1/AVIN2/AVIN3 (Pins 3,6,9) | Analog Supply Input | Powers control circuitry; requires RC filter + 100 nF decoupling to AGND to reject PVIN noise |
| PVIN1/PVIN2/PVIN3 (Pins 25,5,8) | Power Supply Input | Feeds internal MOSFETs; requires ≥2.2 µF ceramic bypass to PGND close to pin |
| AGND (Pins EP1,24,11) | Analog Ground | Reference for FB/SNS/AVIN; must be externally tied to PGND at single point only |
| PGND (Pins EP2,10,2,1) | Power Ground | High-current return path for SW/PVIN; requires wide copper pour and short loop to minimize EMI |
Key Features
| Feature | Design Value |
|---|---|
| Triple 2A Buck Architecture | Three fully independent regulators in one 4 mm × 4 mm FQFN-replaces three discrete converters, saving >60% board area |
| HyperLight Load® Mode | PFM operation below ~130 mA per channel delivers 81% efficiency at 1 mA and ultra-fast load transient recovery (<10 µs) |
| Integrated Power Switches | Fully integrated PMOS high-side and NMOS low-side switches eliminate external MOSFETs and gate drivers |
| Per-Channel Sequencing Support | Independent EN/PG pins enable daisy-chained startup (e.g., PG1 → EN2, PG2 → EN3) without external timers |
| Low-Ripple Full-PWM Operation | 5 mVPP output ripple at full load with 4.7 µF output capacitor-meets tight noise specs for FPGA I/O and ADC reference rails |
| Robust Protection Suite | Thermal shutdown (160°C), per-channel current limit (2.3 A foldback), UVLO (2.55 V), and PG fault detection |
Applications
| Solid State Drives (SSD) | µC/FPGA Core Power |
|---|---|
Use Scenario: Powering NAND flash controller, DRAM cache, and PCIe interface rails in M.2/U.2 SSD modules with strict height (<1 mm) and thermal constraints. IC Role / Device Role / Timing Role: Triple-output DC-DC regulator supplying 1.2 V (core), 1.8 V (I/O), and 3.3 V (interface) simultaneously from 5 V or 3.3 V input. Use Value: 3 MHz switching enables 0.47 µH inductors and 2.2 µF capacitors-achieving total solution height <1 mm while maintaining <30 mVPP ripple on all rails. |
Use Scenario: Delivering tightly regulated, low-noise power to multi-core microcontrollers and FPGA fabric in industrial PLCs and edge AI inference modules. IC Role / Device Role / Timing Role: Independent per-rail regulation with sequenced enable (EN1→PG1→EN2→PG2→EN3) ensuring correct power-up order for complex SoCs. Use Value: 24 µA quiescent current per channel and 81% efficiency at 1 mA extend battery life in always-on sensor fusion subsystems. |
| Security/Surveillance Cameras | High-Performance Servers |
Use Scenario: Powering image sensor, ISP, and video encoder in 4K/8K IP cameras operating in wide temperature ranges (–40°C to +85°C ambient). IC Role / Device Role / Timing Role: Triple buck supplying 1.1 V (sensor core), 1.8 V (memory), and 2.5 V (encoder) with independent PG monitoring for fault isolation. Use Value: –40°C to +125°C junction rating and 20°C/W θJA ensure reliable operation in sealed enclosures without forced airflow. |
Use Scenario: Providing point-of-load (POL) regulation for CPU/GPU voltage domains in 1U rack servers where board space and thermal density are constrained. IC Role / Device Role / Timing Role: High-efficiency triple regulator delivering 2 A each to multiple voltage islands (e.g., VDDIO, VDDA, VDDQ) from a common 5 V intermediate bus. Use Value: 93% peak efficiency reduces power loss by >1.5 W per channel vs. legacy 2 MHz solutions-lowering heatsink requirements and improving PUE. |
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 |
|---|---|---|---|
| MP8859GQ-Z (Monolithic Power) | Triple 3 A outputs; 2.5–6 V input; 1.2 MHz switching; no HyperLight Load mode; higher IQ (45 µA/ch) | Better suited for higher-current, lower-frequency designs where PCB area is less constrained than ripple/noise | Select MP8859GQ-Z when >2 A per rail or wider input range (up to 6 V) is required; avoid if 3 MHz switching or <30 mVPP ripple is mandatory |
| TPS65270PWP (Texas Instruments) | Dual 3 A + single 2 A outputs; 4.5–18 V input; 300–2000 kHz adjustable frequency; external compensation; larger HTSSOP-28 package | Targeted at industrial motor drives and PoE-powered systems needing higher VIN and programmable frequency | Select TPS65270PWP for >5.5 V input or when design flexibility (frequency adjust, external loop compensation) outweighs size/efficiency goals |
Compared with MP8859GQ-Z and TPS65270PWP, the MIC23451-AAAYFL-TR uniquely combines 3 MHz operation, HyperLight Load® efficiency at microamp loads, and 4 mm × 4 mm footprint-making it optimal for space-constrained, low-noise, battery-sensitive applications like SSDs and portable vision systems where alternatives require trade-offs in ripple, size, or light-load performance.
Availability
MIC23451-AAAYFL-TR is available at Aetrix Electronics and suitable for solid-state drives, FPGA-based edge AI accelerators, and security camera modules requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MIC23451-AAAYFL-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
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with emphasis on reliability, longevity, and automotive/industrial qualification.
The MIC23451 belongs to Microchip's HyperLight Load® buck regulator product line, engineered specifically for high-density computing and storage applications demanding ultra-low ripple, fast transient response, and minimal solution size at light-to-moderate loads.
FAQ
What is the maximum output voltage supported by MIC23451-AAAYFL-TR?
The MIC23451-AAAYFL-TR supports output voltages from 1.0 V to 3.3 V per channel, set via external resistor dividers connected to FB1/FB2/FB3 pins using the internal 0.62 V reference. The upper limit is constrained by the SNS pin absolute maximum rating of +6 V and the specified output voltage range in the Electrical Characteristics table.
Does MIC23451-AAAYFL-TR require external compensation components?
No, the MIC23451-AAAYFL-TR is internally compensated and designed to be stable with inductors from 0.47 µH to 2.2 µH and 4.7 µF ceramic output capacitors. External compensation is neither required nor supported-simplifying layout and reducing BOM count.
How does the HyperLight Load® mode affect efficiency at light loads?
In HyperLight Load® mode, the MIC23451-AAAYFL-TR operates in pulse-frequency modulation (PFM) with fixed on-time and variable off-time, reducing switching losses dramatically. This achieves 81% typical efficiency at 1 mA per channel-more than double the efficiency of conventional 3 MHz PWM regulators at the same load.
Can MIC23451-AAAYFL-TR support power sequencing between its three outputs?
Yes, the MIC23451-AAAYFL-TR supports hardware-based sequencing using its independent EN and PG pins: PG1 can drive EN2, and PG2 can drive EN3, enabling controlled, self-timed startup without external controllers. This is validated in Figure 2-33 of the datasheet.
What thermal derating applies when all three channels operate at 2 A simultaneously?
When all three channels deliver 2 A continuously, the MIC23451-AAAYFL-TR requires ≥1 in² copper area and forced airflow to maintain ≤125°C junction temperature. Derating curves in Figures 2-18 and 2-19 show maximum output current drops to ~1.4 A per channel at +85°C ambient with standard 2-layer PCB layout.
MIC23451-AAAYFL-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 26-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TR FAQ
1.How can I place an order for MIC23451-AAAYFL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23451-AAAYFL-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 MIC23451-AAAYFL-TR reliable?
The price and inventory of MIC23451-AAAYFL-TR 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-TR is usually 5 days.
3.What payment methods are accepted for MIC23451-AAAYFL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23451-AAAYFL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23451-AAAYFL-TR?
MIC23451-AAAYFL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23451-AAAYFL-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 MIC23451-AAAYFL-TR?
For technical support, including MIC23451-AAAYFL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23451-AAAYFL-TR requirements.
6.How does Aetrix verify that MIC23451-AAAYFL-TR is sourced from the original manufacturer or authorized distributors?
All MIC23451-AAAYFL-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 MIC23451-AAAYFL-TR meets industry standards.
7.What is the process for return or replacement of MIC23451-AAAYFL-TR?
All MIC23451-AAAYFL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23451-AAAYFL-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 MIC23451-AAAYFL-TR part is unused and in its original packaging.
Return procedure for MIC23451-AAAYFL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC23451-AAAYFL-TR Tags
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MC34063EBD-TR
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