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Microchip Technology MIC23350YFT-TR
- Part No.:
- MIC23350YFT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 16-PowerUFQFN
- Datasheet:
-
MIC23350YFT-TR.pdf
- Description:
- IC REG BUCK PROG 3A 16FTQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC23350YFT-TR from Microchip Technology is a 3A synchronous step-down DC/DC converter with Constant-On-Time (COT) control, HyperLight Load® mode, and pin-strapped output voltage selection across nine fixed values (0.6V–3.3V). It operates from 2.4V to 5.5V input, delivers ±1.5% output accuracy over line/load/temperature, and supports safe start-up into pre-biased outputs - ideal for powering FPGA core rails in portable SSDs.
For engineers reviewing the MIC23350YFT-TR datasheet, MIC23350YFT-TR pinout, MIC23350YFT-TR application, or MIC23350YFT-TR equivalent, key selection criteria include its 1.2 MHz switching frequency at 1.0V output, 10 Ω internal output discharge path, latch-off thermal/current protection, Power Good open-drain signal, and compatibility with the MIC23356 for I²C-based upgrade paths.
Technical Context
The MIC23350YFT-TR implements adaptive COT control with ripple injection and zero-crossing detection to maintain stable switching frequency in continuous conduction mode while enabling ultra-fast transient response. Its HyperLight Load® mode dynamically reduces average switching frequency under light loads to sustain >90% efficiency down to 1 mA.
It integrates high-side (30 mΩ typ.) and low-side (16 mΩ typ.) N-channel MOSFETs, uses VSEL1/VSEL2 three-state logic pins for voltage configuration, and features a dedicated SVIN supply rail with internal 10 Ω resistor coupling to PVIN - decoupling analog reference stability from power-stage noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V to 5.5V - supports single-cell Li-ion battery operation with UVLO at 2.225V (153 mV hysteresis). |
| Output Current | 3A continuous - sustained without derating up to +125°C junction temperature. |
| Output Voltage Options | Nine fixed values (0.6V–3.3V) set by VSEL1/VSEL2 logic states - eliminates external feedback resistors and improves accuracy to ±1.5%. |
| Switching Frequency | 1.2 MHz typical at VOUT = 1.0V - enables compact 0.47 µH inductor and low-output-ripple design. |
| Efficiency | Up to 95% - achieved via COT control, low RDS-ON MOSFETs, and HyperLight Load® mode. |
| Shutdown Current | 1.5 µA typical - minimizes battery drain during system sleep modes. |
| Power Good Output | Open-drain PG with 91% activation threshold and 4% hysteresis - enables reliable power sequencing with MCU or downstream regulators. |
| Thermal Protection | Latch-off shutdown at +165°C with +22°C hysteresis - prevents thermal runaway during sustained overload. |
Pinout & Package
Package: 16-pin FTQFN (2.5 mm × 2.5 mm × 0.55 mm), thermally enhanced with exposed pad (EP) connected internally to PGND. Operating junction temperature range: –40°C to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pins 2,3,13,14,15) | Power ground return | Carries high-frequency switch-node current; must be routed separately from AGND to avoid noise coupling into control circuitry. |
| SW (Pins 1,16) | Switch node | Connects directly to inductor; requires short, wide copper trace to minimize EMI and voltage overshoot. |
| PVIN (Pins 4,5) | Main power input | Supplies high-side MOSFET; requires local 10 µF ceramic capacitor to PGND for high-frequency decoupling. |
| SVIN (Pin 6) | Analog supply input | Provides clean bias for internal reference and control logic; decoupled with 1 µF ceramic capacitor to AGND. |
| VSEL2 (Pin 7), VSEL1 (Pin 8) | Output voltage selection inputs | Three-state logic (GND/float/VIN) sets one of nine output voltages; no external pull-ups required. |
| EN (Pin 9) | Enable control | Active-high logic input; must not be left floating; 1.2V min high threshold ensures robust noise immunity. |
| PG (Pin 10) | Power Good indicator | Open-drain output signals regulation status; requires external pull-up to VIN, VOUT, or auxiliary rail ≤ PVIN. |
| VOUT (Pin 11) | Remote sense & discharge path | Enables point-of-load regulation; also provides 10 Ω internal discharge path to PGND when disabled. |
| AGND (Pin 12) | Analog ground reference | Reference for error amplifier and internal DAC; must connect to quiet ground plane near output capacitor. |
| EP (Pin 17) | Exposed thermal pad | Internally tied to PGND; requires ≥4 thermal vias to inner ground plane for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| No external feedback resistors | VSEL1/VSEL2 pin-strapping eliminates resistor divider network, reducing BOM count and improving voltage-setting accuracy to ±1.5%. |
| Ultra-fast transient response | COT architecture with ripple injection enables sub-10 µs recovery from 0.5A→3A load steps without external compensation. |
| Safe pre-biased start-up | Internal cycle counter delays PWM activation for 8 cycles before enabling negative current limit - prevents reverse inductor current damage. |
| 100% duty-cycle low-dropout mode | High-side MOSFET latches on above ~92% duty cycle, sustaining regulation as VIN approaches VOUT - extends battery runtime. |
| Output discharge on disable | Integrated 10 Ω pull-down between VOUT and PGND ensures controlled discharge to known state, preventing undefined power-up conditions. |
| Latch-off fault protection | Four consecutive hiccup events trigger permanent shutdown until EN toggle or power cycle - protects against persistent overcurrent/overtemperature faults. |
Applications
| FPGA Core Power Supply | SSD Controller Rail |
|---|---|
|
Use Scenario: Powers 1.0V or 1.2V core logic of Xilinx Artix-7 or Intel MAX 10 FPGAs in battery-operated edge devices. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated, low-noise core voltage with fast transient response to logic switching. Use Value: ±1.5% output accuracy and 1.2 MHz switching enable compact layout with 0.47 µH inductor and minimal output capacitance (47 µF). |
Use Scenario: Supplies 1.8V or 2.5V I/O and 1.2V core rails for NVMe SSD controllers in ultraportable laptops. IC Role / Device Role / Timing Role: High-efficiency step-down converter supporting dynamic voltage scaling and deep-sleep modes. Use Value: 1.5 µA shutdown current and HyperLight Load® mode maintain >85% efficiency at 100 µA load - extending SSD standby time. |
| Low-Voltage ASIC Bias | Li-ion Powered IoT Node |
|
Use Scenario: Generates 0.9V or 0.6V supply for custom ASICs in industrial sensor hubs requiring precise voltage margins. IC Role / Device Role / Timing Role: Fixed-output DC/DC regulator with remote sensing (VOUT pin) for accurate point-of-load regulation. Use Value: VOUT remote sense capability compensates for PCB trace IR drop, ensuring ±1.5% accuracy at the ASIC die. |
Use Scenario: Powers ARM Cortex-M4 microcontroller and BLE radio in coin-cell or single-cell Li-ion IoT endpoints. IC Role / Device Role / Timing Role: Main system regulator with programmable output, soft-start, and PG sequencing for orderly boot. Use Value: 0.8 ms/V soft-start limits inrush current; PG output coordinates wake-up of peripheral regulators to avoid peak current surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC23356YFT-TR | I²C-programmable output (0.6V–3.3V in 10 mV steps) vs. pin-strapped fixed options; same package, pinout, and thermal specs. | Required where dynamic voltage scaling or firmware-controlled rail adjustment is needed - not suitable for static voltage designs. | Select MIC23356YFT-TR only if I²C interface and fine-grained voltage control are mandatory; otherwise MIC23350YFT-TR offers lower BOM cost and simpler layout. |
| TPS628641RQYR | 3A buck with 1.8V–5.5V input, 0.6V–3.3V output, but uses external resistor feedback; lacks integrated output discharge and pre-bias start-up support. | Used in cost-sensitive consumer applications where ±2% accuracy and basic sequencing suffice - not recommended for mission-critical FPGA/ASIC rails. | Choose TPS628641RQYR only for non-pre-biased, non-remote-sense applications with relaxed accuracy; MIC23350YFT-TR provides superior regulation integrity and safety features. |
Compared with MIC23356YFT-TR, the MIC23350YFT-TR trades programmability for reduced component count and guaranteed pre-bias robustness; versus TPS628641RQYR, it delivers higher accuracy, integrated discharge, and proven safe start-up - critical for FPGA and SSD controller power domains.
Availability
MIC23350YFT-TR is available at Aetrix Electronics and suitable for FPGA core supplies, SSD controller rails, and low-voltage ASIC biasing requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.
Supply support for MIC23350YFT-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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs, with a focus on reliability, longevity, and industrial-grade qualification.
The MIC23350YFT-TR belongs to Microchip's HyperLight Load® synchronous buck regulator family, designed specifically for high-efficiency, low-noise, and fast-transient power delivery in space-constrained portable and embedded systems.
FAQ
What is the maximum supported output voltage for the MIC23350YFT-TR?
The MIC23350YFT-TR supports nine fixed output voltages: 0.6V, 0.8V, 0.9V, 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. These are selected exclusively via VSEL1 and VSEL2 pin states per Table 4-1 in the datasheet; no other output voltages are supported or guaranteed for the MIC23350YFT-TR.
Does the MIC23350YFT-TR support remote sensing, and how is it implemented?
Yes, the MIC23350YFT-TR supports remote sensing via the dedicated VOUT pin (Pin 11), which connects directly to the load side of the output capacitor. This compensates for PCB trace resistance and ensures ±1.5% regulation accuracy at the point of load - a critical feature for FPGA and ASIC core supplies where voltage margin is tight.
How does the MIC23350YFT-TR handle startup into a pre-biased output?
The MIC23350YFT-TR implements safe pre-biased start-up by disabling PWM for the first 8 switching cycles after EN assertion. During this period, the low-side current limit remains at 0A to prevent reverse inductor current. After 8 cycles, the limit switches to –3A, allowing normal operation - protecting both the IC and external components.
What is the purpose of the SVIN pin on the MIC23350YFT-TR, and how should it be decoupled?
The SVIN pin supplies clean power to the MIC23350YFT-TR's internal reference and control circuitry. It is internally connected to PVIN through a 10 Ω resistor and must be decoupled with a 1.0 µF ceramic capacitor to AGND - placed as close as possible to the pin - to suppress noise coupling into the error amplifier and DAC.
Can the MIC23350YFT-TR operate in dropout mode, and what is its behavior below VIN = VOUT?
Yes, the MIC23350YFT-TR supports 100% duty-cycle dropout operation. When VIN drops near VOUT, the high-side MOSFET latches on above ~92% duty cycle and remains on until VOUT falls 4% below regulation. In dropout, VOUT ≈ VIN – (IOUT × RDS-ON-HS), maintaining usable output down to VIN = VOUT + (IOUT × 30 mΩ).
MIC23350YFT-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):
- 3.3V
- Current - Output:
- 3A
- Frequency - Switching:
- 1.1MHz, 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-FTQFN (2.5x2.5)
MIC23350YFT-TR FAQ
1.How can I place an order for MIC23350YFT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23350YFT-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 MIC23350YFT-TR reliable?
The price and inventory of MIC23350YFT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23350YFT-TR is usually 5 days.
3.What payment methods are accepted for MIC23350YFT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23350YFT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23350YFT-TR?
MIC23350YFT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23350YFT-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 MIC23350YFT-TR?
For technical support, including MIC23350YFT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23350YFT-TR requirements.
6.How does Aetrix verify that MIC23350YFT-TR is sourced from the original manufacturer or authorized distributors?
All MIC23350YFT-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 MIC23350YFT-TR meets industry standards.
7.What is the process for return or replacement of MIC23350YFT-TR?
All MIC23350YFT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23350YFT-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 MIC23350YFT-TR part is unused and in its original packaging.
Return procedure for MIC23350YFT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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