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Microchip Technology MIC22700YML-TR
- Part No.:
- MIC22700YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 24-VFQFN Exposed Pad, 24-MLF®
- Datasheet:
-
MIC22700YML-TR.pdf
- Description:
- IC REG BUCK ADJ 7A 24MLF
- Quantity:
- Payment:
- Shipping:
Inventory:5,797
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Product details
Overview
MIC22700YML-TR from Microchip Technology is a 7A, 1 MHz synchronous buck regulator with integrated high-side P-channel and low-side N-channel MOSFETs, adjustable output down to 0.7V, ultra-fast transient response, and full sequencing/tracking capability for multi-rail systems. It delivers >95% efficiency at 1.8V/7A output from 2.6–5.5V input and operates across –40°C to +125°C junction temperature in a 24-pin 4 mm × 4 mm QFN package.
For engineers reviewing the MIC22700YML-TR datasheet, MIC22700YML-TR pinout, MIC22700YML-TR application, or MIC22700YML-TR equivalent, key selection considerations include its 100% duty cycle capability, RC-controlled soft-start/ramp-down for voltage tracking, integrated POR/PG with programmable delay, and compatibility with small 1 μH inductors and 100 μF ceramic output capacitors in high-density point-of-load designs.
Technical Context
The MIC22700YML-TR implements voltage-mode PWM control with a fixed 1 MHz oscillator and internal compensation architecture optimized for stability with low-ESR ceramic capacitors. Its adaptive drive circuitry enables efficient switching using integrated 30 mΩ P-FET and 25 mΩ N-FET switches, while the RC and DELAY pins provide precise control over output slew rate and power-on-reset timing.
Sequencing and tracking are implemented via analog current-source-based ramp control (RC pin), enable/delay timing (EN/DLY and DELAY pins), and open-drain POR/PG assertion triggered at 90% of nominal VOUT. The device supports both delayed/windowed sequencing and normal/ratio-metric tracking configurations when cascaded with other MIC22xxx or MIC68xxx family members.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.6V to 5.5V - Supports single-cell Li-ion, USB PD, and 3.3V/5V system rails without external LDO pre-regulation. |
| Output Current | Up to 7A - Delivers full rated load with thermal derating up to +125°C junction temperature. |
| Output Voltage Range | Adjustable down to 0.7V - Enables direct powering of modern FPGAs, ASICs, and DDR memory core supplies. |
| Switching Frequency | 1 MHz (±20%) - Enables compact magnetics (e.g., 1 μH) and predictable EMI filtering without burst-mode noise. |
| Feedback Reference | 0.7V ±2% - Sets output accuracy and enables standard resistor-divider design for any VOUT ≥ 0.7V. |
| Current Limit Threshold | 7A (min), 12.5A (typ) - Provides robust overload protection with part-to-part consistency via reference-FET current mirroring. |
| Thermal Shutdown | 160°C (trip), 20°C hysteresis - Prevents permanent damage during sustained overload or poor PCB thermal design. |
| Quiescent Current | 850 μA (typ) in PWM mode - Minimizes no-load power loss in always-on subsystems. |
Pinout & Package
Package: 24-pin, 4 mm × 4 mm QFN (ML), exposed pad (EP) connected to PGND for optimal thermal and electrical performance. Junction temperature range: –40°C to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (1,6,13,18) | Power Input Supply | Bypassed input for high-side P-FET; requires local 22 μF ceramic capacitor per pin. |
| SVIN (17) | Signal Input Supply | Provides clean bias for internal logic and error amplifier; separate bypassing improves noise immunity. |
| EN/DLY (2) | Enable & Startup Delay Control | 1 μA internal current source charges external capacitor to set turn-on delay; threshold = 1.24V. |
| RC (4) | Ramp Control | 1 μA current source/sink programs output voltage slew rate for soft-start and tracking applications. |
| FB (14) | Feedback Input | Connects to resistor divider; compares against 0.7V internal reference to regulate output voltage. |
| COMP (15) | Compensation Node | External RC network (e.g., 20 kΩ + 15–33 pF) sets loop stability for 1 MHz operation with ceramic output caps. |
| POR/PG (5) | Power-on-Reset / Power Good | Open-drain output asserted high when VOUT ≥ 90% of nominal after DELAY timeout; used for system sequencing. |
| SW (8,9,10,11,20,21,22,23) | Switch Node | High-frequency, high-current connection to internal MOSFET drains; requires short, wide PCB traces. |
| PGND (7,12,19,24) | Power Ground | Source connection for internal N-FETs; must be tied to EP and low-impedance ground plane. |
| SGND (16) | Signal Ground | Reference for low-power analog circuitry; isolated from PGND to reduce noise coupling. |
| DELAY (3) | Power-On Reset Delay | 1 μA current source charges external capacitor to delay POR assertion until VOUT reaches regulation. |
| EP | Exposed Pad | Thermal and electrical connection to PGND; mandatory for full 7A output and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Fully integrated synchronous MOSFETs | Eliminates external high-side driver and low-side diode; reduces BOM count and layout complexity. |
| Ultra-fast transient response with easy RC compensation | Stabilizes within microseconds under FPGA/ASIC load steps; requires only one external RC on COMP pin. |
| Full sequencing and tracking capability | Enables precise voltage ramp alignment between multiple rails (e.g., VDDQ/VTT for DDR) without external controllers. |
| 100% maximum duty cycle | Supports dropout operation down to VIN ≈ VOUT, critical for low-VIN, high-efficiency point-of-load conversion. |
| Micropower shutdown mode | Reduces quiescent current to 5 μA (max), enabling low-power standby states in battery-backed systems. |
| Thermal shutdown and current-limit protection | Prevents failure under fault conditions; current limit uses reference-FET mirroring for consistent trip point across temperature and process. |
Applications
| Server CPU Core Supply | DDR Memory VDDQ & VTT Tracking |
|---|---|
Use Scenario: Delivering tightly regulated 0.85V/6A to high-performance server CPUs with rapid load transients during instruction bursts. IC Role / Device Role / Timing Role: Primary point-of-load regulator providing dynamic voltage scaling and fast transient recovery via voltage-mode PWM control. Use Value: Achieves >94% efficiency at 0.85V/6A with 1 μH inductor, minimizing heat generation in dense 1U chassis layouts. | Use Scenario: Simultaneously powering DDR4 VDDQ (1.2V) and VTT (0.6V) rails with matched startup ramp rates and tight voltage tracking. IC Role / Device Role / Timing Role: Dual-MIC22700 configuration using RC and DELAY pins to enforce ratio-metric tracking (VTT = 0.5 × VDDQ) during power-up/down. Use Value: Eliminates need for external tracking ICs; maintains ΔV < 30 mV between rails under all load and temperature conditions. |
| FPGA I/O Bank Power | Industrial PLC Digital I/O Module |
Use Scenario: Supplying 1.8V/5A to FPGA I/O banks requiring independent sequencing relative to core voltage and clean power-good signaling. IC Role / Device Role / Timing Role: Secondary buck regulator controlled by primary's POR/PG signal to ensure safe power-up order and prevent latch-up. Use Value: Uses EN/DLY and POR/PG pins to implement "first-up, last-down" sequencing with programmable delays up to 100 ms. | Use Scenario: Providing isolated 3.3V/3A power to industrial digital I/O modules operating in harsh environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Robust point-of-load converter with –40°C to +125°C operation, thermal shutdown, and ESD-hardened inputs. Use Value: Maintains regulation and protection functionality across extended temperature range without derating, reducing field failure risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 3A max output, 2 MHz switching, no integrated tracking/sequencing pins, smaller 8-pin SOIC package | Suitable for lower-current, space-constrained applications where multi-rail coordination is not required | Select when cost and footprint are prioritized over 7A capability and advanced sequencing features |
| TPS54332DDAR | 3.5A max output, adjustable frequency (100 kHz–2.5 MHz), external MOSFETs, no RC/DELAY pins | Used in designs requiring flexible frequency tuning or higher input voltage (up to 28V) | Select when input voltage exceeds 5.5V or when discrete FETs are preferred for thermal management |
Compared with MP2451DT-LF-Z and TPS54332DDAR, the MIC22700YML-TR uniquely combines 7A output, integrated MOSFETs, and dedicated RC/DELAY/EN-DLY pins for hardware-based voltage tracking-enabling deterministic multi-rail startup without microcontroller intervention or external timing components.
Availability
MIC22700YML-TR is available at Aetrix Electronics and suitable for server power delivery, FPGA/ASIC point-of-load conversion, DDR memory subsystems, and industrial embedded power supplies requiring stable component supply and long-term production continuity.
Supply support for MIC22700YML-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 a focus on reliability, longevity, and embedded system integration.
The MIC22700YML-TR belongs to Microchip's high-efficiency synchronous buck regulator product line, designed specifically for high-power-density point-of-load applications in computing, networking, and industrial equipment where thermal performance, transient response, and multi-rail coordination are critical.
FAQ
What is the minimum recommended output capacitor value for stable operation of the MIC22700YML-TR?
The MIC22700YML-TR requires a minimum 22 μF ceramic output capacitor (X5R or X7R dielectric) for stability. While the typical application uses 100 μF to optimize transient response, values below 22 μF may cause loop instability or excessive output ripple. Y5V and Z5U dielectrics are explicitly prohibited due to capacitance loss and resistive behavior at high frequencies, which can destabilize the voltage-mode control loop.
Can the MIC22700YML-TR operate with a 2.5V input supply?
No, the MIC22700YML-TR cannot operate reliably with a 2.5V input supply. Its absolute minimum input voltage is 2.6V, and the UVLO turn-on threshold is specified at 2.4V–2.6V. At 2.5V, the device may fail to start or exhibit erratic behavior due to insufficient gate drive margin for the internal P-channel MOSFET. For 2.5V input applications, an alternative regulator with lower VIN min specification is required.
How does the RC pin on the MIC22700YML-TR enable voltage tracking between two outputs?
The RC pin on the MIC22700YML-TR sources or sinks a precise 1 μA current to control the slew rate of its own output voltage. In a dual-rail tracking configuration, the RC pin of the master MIC22700YML-TR is connected to the RC pin of the slave device, forcing identical ramp rates during startup and shutdown. This achieves ratio-metric tracking (e.g., VTT = 0.5 × VDDQ) without external op-amps or DACs, as confirmed in Figures 5-8 and 5-10 of the official datasheet DS20006297A.
What is the purpose of the DELAY pin on the MIC22700YML-TR, and how is it used in sequencing?
The DELAY pin on the MIC22700YML-TR provides a programmable delay for the POR/PG output assertion. After VOUT reaches 90% of nominal, a 1 μA current source charges an external capacitor on the DELAY pin; POR/PG goes high when the voltage crosses 1.24V. This allows precise "first-up, last-down" sequencing-for example, delaying the enable of a secondary rail until the primary rail is fully regulated-without software or external timers.
Does the MIC22700YML-TR support 100% duty cycle operation, and under what conditions?
Yes, the MIC22700YML-TR supports 100% duty cycle operation when the feedback voltage falls to ≤0.5V, enabling dropout mode where VOUT ≈ VIN. This occurs during low-input, high-output-current conditions (e.g., VIN = 2.7V, VOUT = 2.5V), ensuring continuous regulation without forced discontinuous conduction mode. The datasheet specifies "100% Maximum Duty Cycle" as a guaranteed feature, critical for maintaining system uptime in marginal input voltage scenarios.
MIC22700YML-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):
- 2.6V
- 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)
MIC22700YML-TR FAQ
1.How can I place an order for MIC22700YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC22700YML-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 MIC22700YML-TR reliable?
The price and inventory of MIC22700YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC22700YML-TR is usually 5 days.
3.What payment methods are accepted for MIC22700YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC22700YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC22700YML-TR?
MIC22700YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC22700YML-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 MIC22700YML-TR?
For technical support, including MIC22700YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC22700YML-TR requirements.
6.How does Aetrix verify that MIC22700YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC22700YML-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 MIC22700YML-TR meets industry standards.
7.What is the process for return or replacement of MIC22700YML-TR?
All MIC22700YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC22700YML-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 MIC22700YML-TR part is unused and in its original packaging.
Return procedure for MIC22700YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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