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Microchip Technology MIC23450-AAAYML-TR
- Part No.:
- MIC23450-AAAYML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 32-VFQFN Exposed Pad, 32-MLF®
- Datasheet:
-
MIC23450-AAAYML-TR.pdf
- Description:
- IC REG BUCK ADJ 2A TRPL 32MLF
- Quantity:
- Payment:
- Shipping:
Inventory:530
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Product details
Overview
MIC23450-AAAYML-TR from Microchip Technology is a triple-channel, 2A synchronous buck regulator IC with HyperLight Load® mode, operating from 2.7V to 5.5V input and delivering adjustable outputs down to 1V. It integrates three independent 3 MHz PWM controllers, each with dedicated power-good indicators, 23 µA typical quiescent current per channel, and 93% peak efficiency-designed for powering FPGA core rails, SSD controller domains, and high-performance server SoCs.
For engineers reviewing the MIC23450-AAAYML-TR datasheet, MIC23450-AAAYML-TR pinout, MIC23450-AAAYML-TR application, or MIC23450-AAAYML-TR equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and transient performance, and real-world substitution guidance for multi-rail POL designs requiring ultra-low light-load efficiency and fast load-step response.
Technical Context
The MIC23450-AAAYML-TR implements a proprietary HyperLight Load® architecture that dynamically switches between pulse-frequency modulation (PFM) at light loads and fixed-frequency 3 MHz PWM in continuous conduction mode (CCM), enabling 81% efficiency at 1 mA while maintaining <30 mVPP output ripple. Each channel features independent enable, feedback, sense, and power-good pins with internal PMOS/NMOS synchronous switches and integrated current limiting.
Its control loop uses a minimum-on-time/minimum-off-time scheme with 0.62 V ±1.5% internal reference, supporting output voltage programming from 1.0 V to 3.3 V via external resistor dividers. Thermal shutdown activates at 160°C with 20°C hysteresis, and undervoltage lockout triggers at 2.55 V (±0.1 V) with 75 mV hysteresis-ensuring robust operation across –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single 3.3 V or dual 5 V/3.3 V system rails without pre-regulation. |
| Output Current (per channel) | 2 A continuous - sustains full load across full temperature range with proper PCB copper area. |
| Switching Frequency | 3 MHz nominal in CCM - enables use of sub-1 µH inductors (e.g., 0.47 µH) and compact 0603-size ceramic capacitors. |
| Quiescent Current | 23 µA per channel - minimizes standby power in always-on subsystems like security camera sensor bias rails. |
| Output Voltage Accuracy | ±2.5% over line/load/temp - ensures reliable core voltage margining for µP/FPGA I/O and memory interfaces. |
| Power-Good Threshold | 90% of VOUT nominal with 10% hysteresis - provides clean, glitch-free sequencing signals for downstream logic enable. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects against sustained overload or poor heatsinking in enclosed industrial enclosures. |
| Package | 32-pin 5 mm × 5 mm QFN-ML with exposed ePAD - achieves θJA = 30°C/W using ≥1 in² internal ground plane. |
Pinout & Package
32-pin 5 mm × 5 mm QFN-ML package with wettable flank leads and thermally enhanced ePAD connected to PGND. Pin 1 is top-left corner (PG1), pin numbering follows standard counter-clockwise sequence. Exposed pad must be soldered to solid PGND plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1, SW2, SW3 (Pins 26, 23, 21) | Switch Node Output | High-speed drain of internal PMOS/NMOS pair; connects directly to inductor; requires tight layout to minimize EMI and ringing. |
| EN1, EN2, EN3 (Pins 30, 3, 8) | Enable Input | Active-high logic control (0.8 V threshold); enables independent channel sequencing; must not float. |
| SNS1, SNS2, SNS3 (Pins 31, 4, 9) | Output Voltage Sense | Direct Kelvin connection point for feedback loop; must route adjacent to output capacitor anode to reject PCB IR drop. |
| FB1, FB2, FB3 (Pins 32, 5, 10) | Feedback Input | Compares divided output voltage to 0.62 V internal reference; sets VOUT = 0.62 × (1 + R1/R2) from 1.0 V to 3.3 V. |
| PG1, PG2, PG3 (Pins 1, 6, 12) | Open-Drain Power-Good | Asserts low when VOUT < 90% nominal; requires external pull-up (≥5 kΩ) to respective VOUT rail. |
| AGND1, AGND2, AGND3 (Pins 2, 7, 11) | Analog Ground Reference | Low-noise return for control circuitry; must be star-connected to quiet ground and tied externally to PGND. |
| PGND1, PGND2, PGND3 (Pins 24, 22, 18) | Power Ground Return | High-current return path for switch node currents; requires low-inductance polygon pour under ePAD and SW pins. |
| PVIN1, PVIN2, PVIN3 (Pins 27, 29, 14) | Power Input Supply | Supplies internal MOSFETs; requires local 2.2–4.7 µF X5R/X7R ceramic capacitor to PGND per channel. |
| AVIN1, AVIN2, AVIN3 (Pins 28, 15, 13) | Analog Input Supply | Supplies control logic; requires RC filter (50 Ω + 100 nF) to AGND to suppress PVIN switching noise. |
| ePAD (Pin EP) | Thermal & Electrical Ground | Exposed copper pad; must be soldered to ≥1 in² internal PGND plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load® Mode | Enables PFM operation below ~100 mA/channel, achieving 81% efficiency at 1 mA and ultra-fast transient recovery (<5 µs). |
| Triple Independent Regulation | Three fully isolated buck channels with separate EN, FB, SNS, and PG pins-supports independent voltage sequencing and fault isolation. |
| Ultra-Low Output Ripple | 30 mVPP in HLL mode and 5 mV in full PWM mode-eliminates need for large bulk capacitors in space-constrained SSD and camera modules. |
| Fully Integrated Power Stages | On-chip PMOS high-side and NMOS low-side switches with <0.2 Ω total RDS(ON)-reduces BOM count to only inductor + 2 capacitors per channel. |
| Robust Protection Suite | Includes per-channel current limit (2–4.5 A), thermal shutdown (160°C), UVLO (2.55 V), and soft-start (115 µs)-prevents damage during hot-plug or short-circuit events. |
| Small Solution Size | Supports 0.47 µH inductors and 2.2 µF output capacitors-enables total solution height <1 mm and footprint <120 mm² for all three rails. |
Applications
| Solid State Drive (SSD) Controller Power | FPGA Core & I/O Rail Sequencing |
|---|---|
|
Use Scenario: Powers NAND flash controller, DRAM cache, and PCIe interface logic in M.2 and U.2 SSDs where board space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Triple-buck regulator delivering 1.2 V (core), 1.8 V (I/O), and 3.3 V (interface) with independent enable and PG signaling for precise power-up/down sequencing. Use Value: HyperLight Load® maintains >80% efficiency at idle states, extending SSD standby time; 3 MHz switching allows use of 0603-sized 4.7 µF X5R output caps. |
Use Scenario: Supplies configurable logic (1.0 V core), transceivers (1.8 V), and auxiliary peripherals (2.5 V) in Xilinx Artix-7 and Intel Cyclone V FPGA-based edge AI accelerators. IC Role / Device Role / Timing Role: Single-package triple regulator replacing discrete DC/DC solutions; PG outputs feed FPGA INIT_B and configuration state machines for deterministic boot. Use Value: Independent EN/PG pins enable hardware-controlled staggered startup, preventing inrush current violations on shared 5 V input bus. |
| Security/Surveillance Camera SoC | High-Performance Server DIMM Power |
|
Use Scenario: Powers image signal processor (ISP), MIPI CSI-2 serializer, and DDR3L memory in 4K PTZ cameras operating in wide-temperature industrial enclosures. IC Role / Device Role / Timing Role: Delivers 1.1 V (ISP core), 1.8 V (MIPI PHY), and 1.35 V (DDR3L) with thermal shutdown protection up to +125°C junction. Use Value: 23 µA/channel quiescent current extends battery backup runtime; 32-pin QFN fits within 10 mm × 10 mm camera module keep-out zone. |
Use Scenario: Provides dynamic VDDQ (1.2 V), VPP (2.5 V), and termination (0.6 V) rails for DDR4 LRDIMMs in 1U rack servers with strict airflow constraints. IC Role / Device Role / Timing Role: High-efficiency POL regulator meeting JEDEC JESD209-4 requirements for memory subsystem power integrity and transient response. Use Value: 5 mV output ripple in PWM mode meets DDR4 VDDQ noise spec; 3 MHz switching avoids interference with 2666+ MT/s data eye timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65283-1RGER | 2.5–5.5 V input; dual 3 A + single 2 A outputs; 2.2 MHz switching; no HyperLight Load®; 45 µA IQ per channel | Lacks ultra-low-light-load efficiency and 3 MHz frequency; better suited for higher-current, lower-frequency systems with less stringent standby power targets | Select when needing higher per-channel current (3 A) and simpler compensation, but accept 15–20% lower efficiency below 10 mA |
| ISL9123IRAJZ-T7A | 2.5–5.5 V input; triple 2 A outputs; 4 MHz switching; 15 µA IQ per channel; no independent PG outputs | Higher switching frequency enables smaller inductors but lacks per-channel power-good signaling required for FPGA/SoC sequencing | Choose for space-critical portable devices where sequencing is handled externally, and 4 MHz operation avoids AM radio band interference |
Compared with TPS65283-1RGER and ISL9123IRAJZ-T7A, the MIC23450-AAAYML-TR uniquely combines 3 MHz operation, HyperLight Load® efficiency down to 1 mA, and three independent open-drain PG outputs-making it the only option among the three capable of autonomous, self-contained power sequencing for multi-domain processors without external supervisors.
Availability
MIC23450-AAAYML-TR is available at Aetrix Electronics and suitable for solid-state drive controller power, FPGA core/I/O rail sequencing, and security camera SoC applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MIC23450-AAAYML-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 Inc. is a leading provider of microcontrollers, analog components, and power management ICs, serving automotive, industrial, communications, and computing markets with vertically integrated silicon and software solutions.
The MIC23450-AAAYML-TR belongs to Microchip's HyperLight Load® family of high-frequency synchronous buck regulators, engineered specifically for multi-rail, low-voltage, low-power embedded systems where light-load efficiency, small solution size, and autonomous sequencing are critical design requirements.
FAQ
What is the maximum output voltage supported by the MIC23450-AAAYML-TR?
The MIC23450-AAAYML-TR supports output voltages from 1.0 V to 3.3 V per channel, set via external resistor dividers connected to the FB pins. The internal 0.62 V reference and feedback equation (VOUT = 0.62 × (1 + R1/R2)) allow precise adjustment across this range. Operation above 3.3 V is not supported, and the absolute maximum sense voltage is 6 V.
Does the MIC23450-AAAYML-TR require external compensation components?
No, the MIC23450-AAAYML-TR is internally compensated and designed to be stable with standard 0.47 µH to 2.2 µH inductors and 4.7 µF ceramic output capacitors. External compensation networks are unnecessary, reducing design complexity and BOM count. Stability is verified across the full operating temperature range (–40°C to +125°C).
How does the HyperLight Load® mode improve efficiency at light loads?
HyperLight Load® mode uses pulse-frequency modulation (PFM) with minimum-on-time/minimum-off-time control, activating switching cycles only when needed to maintain regulation. This reduces gate drive and switching losses dramatically-enabling 81% efficiency at 1 mA per channel, versus ~40–50% for conventional PWM regulators at the same load.
Can the MIC23450-AAAYML-TR operate with a 2.7 V input supply?
Yes, the MIC23450-AAAYML-TR operates down to 2.7 V input across its full temperature range. Its undervoltage lockout turns on at 2.55 V (±0.1 V), providing 150 mV of margin. At 2.7 V input, it reliably delivers 1.0–3.3 V outputs up to 2 A per channel, though peak efficiency decreases slightly compared to 3.6 V or 5 V operation.
What is the recommended PCB layout practice for the ePAD on the MIC23450-AAAYML-TR?
The ePAD on the MIC23450-AAAYML-TR must be soldered to a solid internal PGND plane covering ≥1 in². Use ≥4 thermal vias (0.3 mm diameter, spaced ≤1 mm apart) connecting the ePAD to inner-layer ground planes. Avoid splitting the ePAD ground pour-this ensures optimal thermal resistance (θJA = 30°C/W) and low-impedance return paths for high-frequency switch currents.
MIC23450-AAAYML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 32-VFQFN Exposed Pad, 32-MLF®
- 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:
- 32-MLF® (5x5)
MIC23450-AAAYML-TR FAQ
1.How can I place an order for MIC23450-AAAYML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23450-AAAYML-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 MIC23450-AAAYML-TR reliable?
The price and inventory of MIC23450-AAAYML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23450-AAAYML-TR is usually 5 days.
3.What payment methods are accepted for MIC23450-AAAYML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23450-AAAYML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23450-AAAYML-TR?
MIC23450-AAAYML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23450-AAAYML-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 MIC23450-AAAYML-TR?
For technical support, including MIC23450-AAAYML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23450-AAAYML-TR requirements.
6.How does Aetrix verify that MIC23450-AAAYML-TR is sourced from the original manufacturer or authorized distributors?
All MIC23450-AAAYML-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 MIC23450-AAAYML-TR meets industry standards.
7.What is the process for return or replacement of MIC23450-AAAYML-TR?
All MIC23450-AAAYML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23450-AAAYML-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 MIC23450-AAAYML-TR part is unused and in its original packaging.
Return procedure for MIC23450-AAAYML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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