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Microchip Technology MIC23356-HAYFT-TR
- Part No.:
- MIC23356-HAYFT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 16-PowerUFQFN
- Datasheet:
-
MIC23356-HAYFT-TR.pdf
- Description:
- IC REG BUCK PROG 3A 16FTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,114
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Product details
Overview
MIC23356-HAYFT-TR from Microchip Technology is a 3A synchronous step-down DC-DC converter with I²C programmability, designed for low-voltage FPGA, ASIC, and SSD power rails. It operates from 2.4V–5.5V input, delivers 1.0V default output (5 mV resolution), achieves ±1.5% output accuracy over line/load/temperature, and integrates latch-off thermal and current-limit protection.
For engineers reviewing the MIC23356-HAYFT-TR datasheet, MIC23356-HAYFT-TR pinout, MIC23356-HAYFT-TR application, or MIC23356-HAYFT-TR equivalent, key selection criteria include I²C-configurable slew rate (0.2–3.2 ms/V), 1.5 µA shutdown current, 100% duty cycle capability for ultra-low dropout, and compatibility with MIC23350 for drop-in migration in space-constrained portable designs.
Technical Context
The MIC23356-HAYFT-TR uses Constant-On-Time (COT) control with HyperLight Load™ mode to maintain high efficiency at light loads while delivering ultra-fast transient response. Its adaptive COT architecture dynamically adjusts switching frequency based on load and input conditions, enabling stable operation across 0–3A output range without external compensation.
I²C interface (up to 3.4 MHz) provides full configuration of output voltage (0.6–1.28 V @ 5 mV steps), high-side current limit (5 A typical), enable delay (0.2–3 ms), and soft-start slew rate. Fault reporting-including thermal warning (118°C), latch-off shutdown (165°C), and hiccup-mode short-circuit protection-is communicated via dedicated registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4 V to 5.5 V - supports single-cell Li-ion battery systems with headroom for voltage sag and ripple. |
| Output Current | 3 A continuous - sufficient for core power of mid-tier FPGAs and SSD controllers without derating at +125°C junction. |
| Default Output Voltage | 1.0 V - safe startup level pre-programmed at power-up; configurable via I²C to 0.6–1.28 V in 5 mV steps. |
| Output Accuracy | ±1.5 % - guaranteed over full -40°C to +125°C junction temperature, line, and load range; enables tight regulation without post-regulation. |
| Shutdown Current | 1.5 µA typical - minimizes battery drain in always-on subsystems; enabled by pulling EN = GND. |
| Thermal Protection | Latch-off at 165°C with 22°C hysteresis - prevents thermal runaway; four-cycle overtemp latch ensures robust fault recovery. |
| I²C Speed | Up to 3.4 MHz - supports high-speed host MCU configuration during boot or dynamic voltage scaling (DVS). |
Pinout & Package
Package: 16-lead 2.5 mm × 2.5 mm × 0.55 mm thin FTQFN with exposed thermal pad (EP), rated θJA = 45°C/W. Thermally optimized for compact PCB layouts in portable and embedded applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 (SW) | Switch Node | High-current connection to internal MOSFETs; requires short, wide trace to inductor to minimize EMI and conduction loss. |
| 2, 3, 13, 14, 15 (PGND) | Power Ground | Return path for buck power stage; must be isolated from AGND and connected directly to input/output capacitor negatives and EP. |
| 4, 5 (PVIN) | Power Input Supply | Main input rail (2.4–5.5 V); requires local 10 µF ceramic capacitor to PGND for high-frequency decoupling. |
| 6 (SVIN) | Analog Input Supply | Bias supply for control circuitry; internally connected to PVIN via 10 Ω resistor; requires 1.0 µF ceramic capacitor to AGND. |
| 7 (SCL) | I²C Clock Input | Slave clock input (max 3.4 MHz); pulled up externally; no internal pull-up; must meet standard-mode/fast-mode timing. |
| 8 (SDA) | I²C Data I/O | Open-drain bidirectional data line; requires external pull-up; supports multi-master arbitration and ACK/NACK. |
| 9 (EN) | Enable Control | Active-high logic input; 1.2 V min high threshold; 0.4 V max low threshold; internal 0.01–500 nA leakage. |
| 10 (PG) | Power Good Output | Open-drain status signal; asserts high when VOUT ≥ 91% of target; deasserts at ≤87%; includes 65 µs blanking. |
| 11 (VOUT) | Remote Sense / Discharge Path | Connects near output capacitor for accurate regulation; enables internal 10 Ω discharge path when EN = GND. |
| 12 (AGND) | Analog Ground | Reference for error amplifier, DAC, and I²C logic; must tie to clean ground plane, separate from PGND loop. |
| 17 (EP) | Exposed Thermal Pad | Internally tied to PGND; requires ≥4 thermal vias to inner ground plane for effective heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| I²C Programmable Output Voltage | 0.6 V–1.28 V in 5 mV steps - enables precise core voltage tuning for performance vs. power trade-offs in FPGAs and ASICs. |
| HyperLight Load™ Mode | Automatic transition to diode-emulation PFM at light loads - maintains >85% efficiency down to 10 mA without external components. |
| Slew Rate Control | Configurable 0.2–3.2 ms/V ramp - prevents overshoot during dynamic voltage scaling and ensures controlled inrush into large bulk capacitance. |
| Safe Start-Up with Pre-Biased Output | Enables reliable power-up into existing output voltage - critical for hot-swap and multi-rail sequencing where downstream rails may already be active. |
| Output Discharge on Disable | Internal 10 Ω pull-down activated via I²C - guarantees known low-state output after shutdown, eliminating floating rail risks in safety-critical systems. |
| 100% Duty Cycle Operation | Supports dropout as low as 100 mV - extends usable battery life in Li-ion systems by maintaining regulation until input falls to ~1.1 V above output. |
Applications
| FPGA Core Power | SSD Controller Supply |
|---|---|
Use Scenario: Powers 28 nm or 16 nm FPGA core logic requiring tightly regulated 0.85–1.0 V at up to 3 A peak current. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with remote sensing and I²C-based dynamic voltage scaling (DVS). Use Value: ±1.5% output accuracy and ultra-fast transient response (<80 µs) prevent logic errors during burst-mode operation. |
Use Scenario: Supplies NAND flash controller and DRAM cache in consumer and enterprise SSDs with strict power sequencing requirements. IC Role / Device Role / Timing Role: Main 1.0 V supply with Power Good (PG) output used to sequence auxiliary LDOs and NAND I/O rails. Use Value: PG blanking (65 µs) and hysteresis (4%) eliminate false triggers during voltage ramp; latch-off thermal protection prevents NAND corruption under thermal stress. |
| Portable Li-ion System Rail | Low-Power Industrial MCU Core |
Use Scenario: Delivers regulated 1.0 V to ARM Cortex-M7 or RISC-V SoC in handheld test equipment powered by single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: High-efficiency main PMIC buck stage with 1.5 µA shutdown current and 100% duty cycle for extended runtime. Use Value: HyperLight Load™ mode sustains >90% efficiency at 100 µA load, extending battery life in sleep modes without compromising wake-up speed. |
Use Scenario: Powers real-time industrial microcontroller (e.g., SAM E70) requiring stable 1.0 V core voltage in vibration-prone environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Robust, thermally protected buck regulator with -40°C to +125°C operation and latch-off fault handling. Use Value: 165°C thermal shutdown with 22°C hysteresis prevents field failures; ±1.5% accuracy eliminates need for calibration across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC23350YFT | Same pinout, 0.6 V default, 3.5 A high-side current limit, no output discharge, lower thermal shutdown threshold (150°C). | Targeted at cost-sensitive, fixed-voltage applications without I²C configuration needs or active discharge requirement. | Select when migrating legacy MIC23350 designs; verify thermal margin and disable discharge function if unused. |
| TPS628641RQYR | 3 A, 0.6–1.2 V output, 1.8–5.5 V input, 1.2 MHz fixed frequency, no I²C, 2.5 µA shutdown current, no PG or thermal latch-off. | Designed for simpler, non-sequenced point-of-load applications where configurability and fault reporting are secondary. | Choose for minimal BOM count and layout simplicity; avoid where I²C telemetry, PG sequencing, or latch-off safety is required. |
Compared with MIC23356-HAYFT-TR, MIC23350YFT offers pin compatibility but lacks I²C programmability and active discharge, while TPS628641RQYR trades configurability and fault intelligence for lower quiescent current and simpler integration-making MIC23356-HAYFT-TR optimal for systems demanding dynamic voltage control, robust fault handling, and precise sequencing.
Availability
MIC23356-HAYFT-TR is available at Aetrix Electronics and suitable for FPGA core power, SSD controller supply, and portable Li-ion system rail applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC23356-HAYFT-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, FPGA, and power management semiconductors, with a focus on reliability, longevity, and embedded system integration.
The MIC23356 belongs to Microchip's HyperLight Load™ synchronous buck regulator product line, engineered for high-efficiency, low-noise, and I²C-configurable power delivery in space-constrained portable and industrial applications.
FAQ
What is the default output voltage of the MIC23356-HAYFT-TR at power-up?
The MIC23356-HAYFT-TR powers up with a factory-programmed default output voltage of 1.0 V. This value is stored in nonvolatile configuration bits and remains active until overwritten via I²C. The device supports subsequent reprogramming to any value between 0.6 V and 1.28 V in 5 mV increments, ensuring safe startup before dynamic voltage scaling begins. The 1.0 V default aligns with common FPGA core and SSD controller requirements.
Does the MIC23356-HAYFT-TR support remote voltage sensing, and how is it implemented?
Yes, the MIC23356-HAYFT-TR supports true remote voltage sensing via the dedicated VOUT pin (Pin 11). This pin connects directly to the load side of the output capacitor to compensate for PCB trace IR drop. When enabled, the internal error amplifier regulates based on this sensed voltage-not the IC's VOUT pin voltage-ensuring ±1.5% accuracy at the point of load. Remote sensing is mandatory for applications requiring tight regulation under high-current or long-trace conditions.
Can the MIC23356-HAYFT-TR operate with an input voltage below its nominal 2.4 V minimum?
No-the MIC23356-HAYFT-TR has a hard undervoltage lockout (UVLO) threshold of 2.225 V (typical), with hysteresis of 153 mV. Below 2.15 V (min), the device disables switching and asserts PG low. However, it supports 100% duty cycle operation down to ~1.1 V above the programmed output voltage (e.g., 2.1 V input for 1.0 V output), enabling extended battery runtime right up to UVLO activation.
How does the MIC23356-HAYFT-TR handle short-circuit faults?
The MIC23356-HAYFT-TR detects short circuits using dual high-side and low-side current sensing. Upon exceeding the programmed high-side current limit (5 A typical for MIC23356-HAYFT-TR), it enters hiccup mode: eight current-limit pulses occur, followed by a 1 ms restart attempt. If fault persists over four thermal cycles, it latches off permanently until EN is cycled. This behavior prevents thermal damage and ensures predictable failure mode in safety-critical systems.
Is the MIC23356-HAYFT-TR pin-compatible with other devices in the MIC2335x family?
Yes-the MIC23356-HAYFT-TR shares identical 16-pin FTQFN pinout and footprint with the MIC23350 series, including MIC23350YFT. This allows direct replacement in existing layouts without PCB revision. However, functional differences exist: MIC23356-HAYFT-TR adds I²C programmability, output discharge, higher current limit (5 A vs. 3.5 A), and enhanced thermal protection (165°C latch-off vs. 150°C), requiring firmware and system-level validation during migration.
MIC23356-HAYFT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 16-PowerUFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 1.28V
- Current - Output:
- 3A
- Frequency - Switching:
- 1.6MHz, 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-FTQFN (2.5x2.5)
MIC23356-HAYFT-TR FAQ
1.How can I place an order for MIC23356-HAYFT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23356-HAYFT-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 MIC23356-HAYFT-TR reliable?
The price and inventory of MIC23356-HAYFT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23356-HAYFT-TR is usually 5 days.
3.What payment methods are accepted for MIC23356-HAYFT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23356-HAYFT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23356-HAYFT-TR?
MIC23356-HAYFT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23356-HAYFT-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 MIC23356-HAYFT-TR?
For technical support, including MIC23356-HAYFT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23356-HAYFT-TR requirements.
6.How does Aetrix verify that MIC23356-HAYFT-TR is sourced from the original manufacturer or authorized distributors?
All MIC23356-HAYFT-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 MIC23356-HAYFT-TR meets industry standards.
7.What is the process for return or replacement of MIC23356-HAYFT-TR?
All MIC23356-HAYFT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23356-HAYFT-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 MIC23356-HAYFT-TR part is unused and in its original packaging.
Return procedure for MIC23356-HAYFT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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