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Microchip Technology MIC22705YML-TR
- Part No.:
- MIC22705YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 24-VFQFN Exposed Pad, 24-MLF®
- Datasheet:
-
MIC22705YML-TR.pdf
- Description:
- IC REG BUCK ADJ 7A 24MLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,805
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Product details
Overview
MIC22705YML-TR from Microchip Technology is a 7A, 1 MHz synchronous buck regulator IC with integrated high-side P-channel and low-side N-channel MOSFETs, operating from 2.9V to 5.5V input and delivering adjustable output down to 0.7V - optimized for FPGA, DSP, and low-voltage ASIC point-of-load power in servers and base stations.
For engineers reviewing the MIC22705YML-TR datasheet, MIC22705YML-TR pinout, MIC22705YML-TR application, or MIC22705YML-TR equivalent, key selection criteria include pre-bias safe start-up, 95%+ efficiency at 7A, full sequencing/tracking capability via EN/DLY and RC pins, and thermal shutdown protection across –40°C to +125°C junction range.
Technical Context
The MIC22705YML-TR implements voltage-mode PWM control with fixed 1 MHz switching frequency and internal compensation architecture featuring a built-in phase-lead zero and phase-lag pole - enabling stable operation with minimal external components (single RC network on COMP pin). It supports 100% duty cycle during dropout and uses an internal 1 µA current source for both EN/DLY delay timing and RC-controlled soft-start/ramp tracking.
Its dual-input architecture separates PVIN (power path) from SVIN (signal reference), with dedicated PGND and SGND planes to minimize noise coupling. The device integrates thermal shutdown (160°C trip, 20°C hysteresis), overcurrent protection (7–21 A current limit), and Power Good monitoring with 90% VFB threshold and 2% hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9V to 5.5V - supports single 3.3V or dual 3.3V/5V rail systems without external LDO pre-regulation. |
| Output Current | Up to 7A continuous - sufficient for powering high-performance FPGAs and multi-core processors at sub-1.8V rails. |
| Switching Frequency | 1.0 MHz (±20%) - enables compact magnetics (e.g., 1 µH inductor) and predictable EMI filtering with fixed fundamental. |
| Feedback Reference | 0.700 V ±1.4% - sets precise output voltage via resistor divider; enables 0.7V–5.5V adjustable output with <0.2% load/line regulation. |
| Efficiency | >95% at 7A, VIN=3.3V/VOUT=1.8V - minimizes thermal load in dense PCB layouts and reduces system cooling requirements. |
| Junction Temp Range | –40°C to +125°C - qualified for industrial and telecom infrastructure environments without derating. |
| Package | 24-pin 4 mm × 4 mm QFN-ML (exposed pad) - provides low θJA = 40°C/W and θJC = 14°C/W for effective heat dissipation. |
Pinout & Package
24-pin 4 mm × 4 mm QFN-ML package with exposed thermal pad (EP) requiring full GND plane connection. Pin 1 is top-left corner (PVIN), with symmetric PVIN and PGND distribution for optimal power delivery and ground return.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (Pins 1,6,13,18) | High-current input supply | Connects to input capacitor bank; each requires local 22 µF ceramic bypass to suppress high-frequency ripple and reduce ESR-induced losses. |
| EN/DLY (Pin 2) | Enable with programmable delay | Internally sourced 1 µA current charges external capacitor; turn-on delayed until voltage reaches 1.24 V threshold - enables precise power sequencing. |
| RC (Pin 4) | Ramp control for soft-start/tracking | 1 µA current source drives external capacitor to generate linear VRC ramp; output voltage tracks VRC, enabling ratio-metric startup with other MIC22xxx/MIC68xxx devices. |
| PG (Pin 5) | Open-drain Power Good flag | Asserts low when VOUT falls below 90% of nominal; used to enable downstream regulators or trigger system reset logic. |
| FB (Pin 14) | Feedback input | Regulated to 0.7 V; connects to resistor divider from VOUT; high-impedance node (10 nA bias) requiring noise mitigation (e.g., 50–100 pF capacitor). |
| COMP (Pin 15) | Compensation network interface | Accepts series R-C network to add dominant pole-zero pair; simplifies stability design for ceramic-output applications with 0.47–4.7 µH inductors. |
| SW (Pins 8,9,10,11,20,21,22,23) | Switch node | Drain connection of internal P- and N-MOSFETs; high di/dt node requiring short, wide copper traces and minimized loop area to reduce EMI and switching losses. |
| PGND (Pins 7,12,19,24) | Power ground return | Low-impedance return path for switch current; must be connected directly to EP and separated from SGND to avoid noise coupling into control circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Pre-biased output start-up | Enables safe turn-on into existing VOUT voltage (e.g., from back-powering or shared rail); prevents reverse inductor current and output overshoot. |
| Full sequencing & tracking | EN/DLY and RC pins allow configurable turn-on/turn-off order and voltage-ratio alignment across multiple MIC22xxx regulators - critical for multi-rail SoC/FPGA power domains. |
| Integrated MOSFETs | 30 mΩ high-side P-MOSFET and 25 mΩ low-side N-MOSFET eliminate external switch selection, layout complexity, and gate-drive design effort. |
| Ultra-fast transient response | Control loop bandwidth ~150 kHz maintains ±1.5% VOUT regulation under 1–7 A load steps (200 ns rise/fall), essential for burst-mode digital loads. |
| Thermal & current protection | 160°C junction shutdown with 20°C hysteresis and cycle-by-cycle current limiting (7–21 A range) ensure robust operation under overload or short-circuit conditions. |
Applications
| Server Point-of-Load | FPGA Core Power |
|---|---|
Use Scenario: Delivering 1.2V/6A to Xilinx UltraScale+ FPGA core rail in 1U rack server with tight thermal constraints and strict sequencing requirements relative to I/O and auxiliary supplies. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing regulated core voltage; controlled via RC pin to track auxiliary 1.8V rail during power-up and EN/DLY for staggered enable timing. Use Value: Eliminates need for external MOSFETs and complex compensation, achieving >94% efficiency at full load while meeting JEDEC JESD22-A104 temperature cycling spec. |
Use Scenario: Powering Intel Agilex FPGA transceiver banks requiring clean, low-noise 0.85V supply with fast transient recovery to prevent bit errors during high-speed serial link initialization. IC Role / Device Role / Timing Role: High-bandwidth buck converter with ultra-fast transient response; FB pin referenced to 0.7V internal reference enables precise 0.85V setting using standard 1% resistors. Use Value: Maintains <±15 mV output deviation during 4 A/µs load transients, reducing need for bulk output capacitance and saving board space. |
| Base Station RF Front-End | Industrial Edge AI Module |
Use Scenario: Supplying 1.0V/5A to GaN amplifier bias controller in 5G massive MIMO active antenna unit, operating continuously at +85°C ambient with no forced airflow. IC Role / Device Role / Timing Role: Thermally robust buck regulator with –40°C to +125°C junction rating; PG signal used to validate stable output before enabling RF PA stage. Use Value: Delivers full 5A output at +125°C junction with <10°C temperature rise above ambient due to low RDS(ON) and QFN-ML thermal design. |
Use Scenario: Generating 1.8V/4A for NVIDIA Jetson Orin NX SoC in sealed industrial vision system requiring long-term reliability and immunity to voltage droop during inference bursts. IC Role / Device Role / Timing Role: Pre-bias safe regulator enabling hot-swap capability; EN/DLY pin tied to system supervisor IC for coordinated power-up after FPGA configuration completes. Use Value: Prevents output collapse during brown-out events and ensures deterministic restart without latch-up or latch-down behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4572GQB-Z (Monolithic Power Systems) | 6A rated, 2.5–18V input, 500kHz–1.5MHz adjustable frequency, no RC tracking pin, 0.6V reference | Lacks integrated ramp control for multi-rail tracking; better suited for standalone single-rail designs with wider VIN range | Select when input exceeds 5.5V or tracking is not required; verify thermal performance at 7A with external MOSFETs. |
| TPS54719RGRT (Texas Instruments) | 7A rated, 4.5–18V input, 1MHz fixed, 0.6V reference, no pre-bias start-up, separate BOOT pin | Requires external bootstrap capacitor and lacks pre-bias safety - unsuitable for systems with shared or back-powered rails | Choose only for non-pre-biased 5V-input applications where TI's WEBENCH support is prioritized over robustness. |
Compared with MPQ4572GQB-Z and TPS54719RGRT, the MIC22705YML-TR uniquely combines 7A capability, 2.9–5.5V input, pre-bias safe start-up, and RC-based tracking in a single 4×4 mm QFN - making it the only option qualified for tightly sequenced, multi-rail FPGA and ASIC power in space-constrained telecom and computing platforms.
Availability
MIC22705YML-TR is available at Aetrix Electronics and suitable for server power delivery, 5G base station RF subsystems, and industrial edge AI modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MIC22705YML-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 company specializing in microcontrollers, analog devices, and power management ICs, with ISO 9001-certified manufacturing and global distribution.
The MIC22705YML-TR belongs to Microchip's MIC22xxx family of high-efficiency, integrated synchronous buck regulators designed specifically for high-density point-of-load conversion in computing, networking, and communications infrastructure.
FAQ
What is the maximum output current capability of the MIC22705YML-TR?
The MIC22705YML-TR delivers up to 7A continuous output current under typical thermal conditions (TJ ≤ +125°C, 4-layer PCB with 1 oz copper and 2 in² thermal pad). Its current limit is programmable between 7A and 21A depending on VFB level, and thermal shutdown activates at 160°C junction temperature to protect against sustained overload. Full 7A operation is verified per DS20006307A with 1 µH inductor and 100 µF output capacitance.
Does the MIC22705YML-TR support pre-biased output start-up?
Yes, the MIC22705YML-TR is explicitly designed for safe start-up into a pre-biased output. During turn-on, the low-side MOSFET remains off until the RC ramp reaches the reference voltage, preventing reverse inductor current and output voltage oscillation. This behavior is validated in Figures 2-35 and 2-36 of the official datasheet DS20006307A and is critical for systems with shared power rails or hot-swap capability.
How is output voltage adjusted on the MIC22705YML-TR?
Output voltage is set via a resistor divider from VOUT to FB, with the internal 0.700 V reference regulating the FB pin. Using Equation 4-4 from the datasheet, R2 = R1 × (VOUT/0.7 − 1), where R1 ≤ 10 kΩ is recommended to minimize noise susceptibility. For example, a 1.8V output uses R1 = 1.10 kΩ and R2 = 69 Ω (as shown in the Typical Application Circuit on page 2 of DS20006307A).
What is the purpose of the RC pin on the MIC22705YML-TR?
The RC pin provides a precision 1 µA current source/sink to implement soft-start, voltage ramping, and inter-device tracking. When connected to a capacitor, it generates a linear voltage ramp controlling output slew rate; when driven externally, it allows ratio-metric voltage alignment with other MIC22xxx or MIC68xxx regulators. This enables synchronized power-up across multiple rails - a requirement for FPGA and multi-core SoC applications documented in Section 4.8 of DS20006307A.
Can the MIC22705YML-TR operate with 100% duty cycle?
Yes, the MIC22705YML-TR supports 100% duty cycle operation during input voltage dropout conditions, maintaining regulation as low as VOUT + VDS(ON) drop. This is enabled by its synchronous architecture and internal control logic that sustains high-side MOSFET conduction when needed - confirmed in the General Description (page 1) and Electrical Characteristics table (page 3) of DS20006307A, where "Maximum Duty Cycle" is specified as 100%.
MIC22705YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad, 24-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.7V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 7A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-MLF® (4x4)
MIC22705YML-TR FAQ
1.How can I place an order for MIC22705YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC22705YML-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 MIC22705YML-TR reliable?
The price and inventory of MIC22705YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC22705YML-TR is usually 5 days.
3.What payment methods are accepted for MIC22705YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC22705YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC22705YML-TR?
MIC22705YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC22705YML-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 MIC22705YML-TR?
For technical support, including MIC22705YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC22705YML-TR requirements.
6.How does Aetrix verify that MIC22705YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC22705YML-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 MIC22705YML-TR meets industry standards.
7.What is the process for return or replacement of MIC22705YML-TR?
All MIC22705YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC22705YML-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 MIC22705YML-TR part is unused and in its original packaging.
Return procedure for MIC22705YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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