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Microchip Technology MIC22400YTSE
- Part No.:
- MIC22400YTSE
- Manufacturer:
- Microchip Technology
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MIC22400YTSE.pdf
- Description:
- IC REG BUCK ADJ 4A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,183
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Product details
Overview
MIC22400YTSE from Microchip Technology is a 4A integrated synchronous buck regulator with adjustable output down to 0.7V, 300 kHz–4 MHz programmable switching frequency, and full sequencing/tracking capability for multi-rail systems. It delivers >90% efficiency at 1 MHz across wide load range and supports FPGA, ASIC, and server point-of-load applications requiring fast transient response and tight voltage tracking.
For engineers reviewing the MIC22400YTSE datasheet, MIC22400YTSE pinout, MIC22400YTSE application, or MIC22400YTSE equivalent, key selection factors include its 20-pin QFN (3 mm × 4 mm) package, 100% duty cycle operation, integrated 60 mΩ P-FET / 35 mΩ N-FET switches, thermal shutdown, and precise 0.7 V ±1% feedback reference-critical for low-voltage, high-density power delivery designs.
Technical Context
The MIC22400YTSE implements voltage-mode PWM control with an internal 1 MHz ramp generator and adaptive drive circuitry enabling ultra-fast transient response under FPGA/ASIC load steps. Its dual-input power architecture separates PVIN (for high-side switch) and SVIN (for signal circuitry), each with dedicated ground paths (PGND and SGND) to minimize noise coupling.
Sequencing is achieved via EN/DLY (1 μA current source, 1.24 V threshold) and DELAY (1 μA source/sink) pins, while RC pin enables programmable output slew rate for voltage tracking between multiple MIC22400YTSE units. The device supports soft-start, POR generation, and operates over –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.6 V to 5.5 V - supports single-supply operation from common intermediate bus rails (3.3 V, 5 V) |
| Output Current | Up to 4 A continuous - sufficient for core I/O power of FPGAs and low-voltage ASICs |
| Feedback Reference | 0.7 V ±1% - enables precise 0.7 V–5.5 V adjustable output with minimal resistor divider error |
| Switching Frequency | 300 kHz to 4 MHz - programmable via CF capacitor and optional RCF resistor for EMI optimization |
| Efficiency | >90% at 1 MHz, 1.2 V/4 A - reduces thermal load in high-power-density PCB layouts |
| Thermal Protection | 150°C overtemperature shutdown with 10°C hysteresis - prevents permanent damage during sustained overload |
| Duty Cycle Range | 0–100% - maintains regulation even during input voltage dropout conditions |
Pinout & Package
Package: 20-pin 3 mm × 4 mm QFN with exposed thermal pad (EP). Pin mapping validated per Microchip DS20006243A, page 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| POR | Open-drain Power-On-Reset output | Signals output regulation status after DELAY timeout; requires external pull-up for system reset coordination |
| CF | Frequency programming input | Capacitor-to-GND sets switching frequency (300 kHz–4 MHz); adds resistor for sub-800 kHz operation |
| COMP | Compensation network node | RC network (resistor + capacitor to SGND) stabilizes voltage-mode loop with ceramic output capacitors |
| FB | Feedback input | Connects to resistor divider; compares output to 0.7 V reference for closed-loop regulation |
| EN/DLY | Enable/delay control input | 1 μA current source charges external capacitor; 1.24 V threshold initiates startup with programmable delay |
| RC | Ramp control input | 1 μA current source sets output voltage slew rate during startup for precise tracking with other MIC22400YTSE units |
| SW | Switch node output | Drain connection of internal P-FET and N-FET; high di/dt path requiring short, wide PCB traces |
| PGND | Power ground | Return path for high-current N-FET source and SW node; must be low-inductance plane connection |
| SGND | Signal ground | Reference for FB, COMP, EN/DLY, RC, POR, CF - isolated from PGND to prevent noise coupling |
| PVIN / SVIN | Power and signal input supplies | PVIN powers high-side switch; SVIN powers control circuitry - both require local 22 μF X5R/X7R bypass |
Key Features
| Feature | Design Value |
|---|---|
| Fully integrated MOSFETs | 60 mΩ P-channel and 35 mΩ N-channel switches eliminate external FETs and reduce BOM count |
| Ultra-fast transient response | Stabilizes output within microseconds under 0.1 A/μs load steps - critical for FPGA core voltage integrity |
| Programmable sequencing & tracking | EN/DLY, DELAY, and RC pins enable deterministic multi-rail power-up/down order and ΔV-controlled ramp matching |
| Micropower shutdown | 5 μA shutdown current - preserves battery life in always-on subsystems or standby modes |
| Thermal and current protection | 150°C thermal shutdown + cycle-by-cycle current limit (4–10 A) - ensures robust operation under fault conditions |
Applications
| Server Core Voltage Regulation | FPGA I/O Bank Power |
|---|---|
Use Scenario: Providing tightly regulated 1.2 V/4 A supply to CPU cores in 1U rack servers with strict thermal and space constraints. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator delivering stable core voltage with <±1% line/load regulation and 100 ns transient recovery. Use Value: Enables >90% efficiency at 1 MHz, reducing heat sink requirements and allowing higher power density in air-cooled chassis. | Use Scenario: Powering multiple I/O banks on Xilinx or Intel FPGAs where rail sequencing and voltage tracking are mandatory. IC Role / Device Role / Timing Role: Synchronized buck controller using RC and DELAY pins to match slew rates and enforce turn-on order across 3+ voltage domains. Use Value: Eliminates need for external tracking ICs; achieves <±10 mV inter-rail tracking during startup via integrated RC control. |
| Telecom Baseband Processing | Industrial PLC CPU Module |
Use Scenario: Supplying 1.8 V/3 A to DSP-based baseband processors in 5G small cells operating at –40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-reliability buck converter with –40°C to +125°C junction rating and built-in POR for cold-start robustness. Use Value: Maintains 0.7 V reference accuracy over full temperature range, ensuring consistent ADC/DAC biasing and signal chain performance. | Use Scenario: Delivering 3.3 V/4 A to ARM Cortex-A series CPUs in DIN-rail mounted PLC controllers with long lifecycle requirements. IC Role / Device Role / Timing Role: Industrial-grade POL regulator with thermal shutdown, current limiting, and 100% duty cycle support for brownout resilience. Use Value: Withstands 150°C junction shutdown and 10 A peak current limit, preventing field failures during motor drive EMI transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4420AGL-A-Z | 4 A, 36 V input, 500 kHz–3 MHz freq, 0.8 V ref, no integrated RC/DELAY sequencing | Lacks dedicated tracking/sequencing pins; requires external circuitry for multi-rail coordination | Preferred when wider input range (up to 36 V) is needed but sequencing is handled externally |
| TPS544B20RTWR | 4 A, 4.5–18 V input, 400 kHz–2 MHz freq, 0.6 V ref, PMBus interface, no RC pin | Includes digital interface for telemetry and margining; no analog ramp control for tracking | Chosen when remote monitoring, dynamic voltage scaling, or firmware-configurable settings are required |
Compared with MPQ4420AGL-A-Z and TPS544B20RTWR, the MIC22400YTSE uniquely integrates RC-controlled slew rate and DELAY-timed POR for analog-only multi-rail coordination-eliminating microcontroller dependency in cost-sensitive, high-reliability embedded systems.
Availability
MIC22400YTSE is available at Aetrix Electronics and suitable for server power delivery, FPGA board design, and industrial PLC development requiring stable component supply, extended temperature operation, and seamless multi-rail sequencing.
Supply support for MIC22400YTSE 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 leading provider of microcontrollers, analog devices, and power management ICs, headquartered in Chandler, Arizona.
The MIC22400 product line delivers high-efficiency, fully integrated synchronous buck regulators optimized for FPGA, ASIC, and processor core power in space-constrained, thermally demanding applications.
FAQ
What is the maximum output current capability of the MIC22400YTSE?
The MIC22400YTSE supports up to 4 A continuous output current under typical thermal conditions. Its current limit is specified at 4 A minimum (7 A typical, 10 A max), and thermal shutdown activates at 150°C junction temperature. Actual achievable current depends on PCB layout, ambient temperature, and heatsinking-validated designs with 2-layer 2 oz copper achieve 4 A at +85°C ambient using the 3 mm × 4 mm QFN package.
Does the MIC22400YTSE support 100% duty cycle operation?
Yes, the MIC22400YTSE supports 100% duty cycle operation when the output voltage drops below regulation due to input voltage sag or heavy load. This feature maintains output regulation during input brownout conditions without requiring external components, preserving system uptime in industrial and telecom applications where input rails may fluctuate.
How is output voltage adjusted on the MIC22400YTSE?
The MIC22400YTSE uses a resistor divider connected to the FB pin to set output voltage, referenced to an internal 0.7 V ±1% precision bandgap. For example, a 10 kΩ lower resistor and 17.1 kΩ upper resistor yields 1.2 V output. Feedback impedance should remain ≤10 kΩ to minimize noise susceptibility, and a 50–100 pF capacitor across the lower resistor improves noise immunity.
What is the function of the RC pin on the MIC22400YTSE?
The RC pin on the MIC22400YTSE controls output voltage slew rate during startup by sourcing a precise 1 μA current into an external capacitor to ground. This enables voltage tracking between multiple MIC22400YTSE units-e.g., coordinating 1.2 V and 1.8 V rails to ramp within ±10 mV-without external timing circuitry or microcontroller intervention.
Can the MIC22400YTSE operate over the full industrial temperature range?
Yes, the MIC22400YTSE is rated for –40°C to +125°C junction temperature, meeting industrial and extended commercial requirements. Its electrical characteristics-including 0.7 V feedback reference, 1.24 V EN threshold, and 150°C thermal shutdown-are guaranteed across this range, making it suitable for base stations, factory automation, and outdoor networking equipment.
MIC22400YTSE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 4A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
MIC22400YTSE FAQ
1.How can I place an order for MIC22400YTSE through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC22400YTSE 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 MIC22400YTSE reliable?
The price and inventory of MIC22400YTSE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC22400YTSE is usually 5 days.
3.What payment methods are accepted for MIC22400YTSE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC22400YTSE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC22400YTSE?
MIC22400YTSE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC22400YTSE 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 MIC22400YTSE?
For technical support, including MIC22400YTSE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC22400YTSE requirements.
6.How does Aetrix verify that MIC22400YTSE is sourced from the original manufacturer or authorized distributors?
All MIC22400YTSE 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 MIC22400YTSE meets industry standards.
7.What is the process for return or replacement of MIC22400YTSE?
All MIC22400YTSE units undergo pre-shipment inspection (PSI). If there is an issue with MIC22400YTSE, 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 MIC22400YTSE part is unused and in its original packaging.
Return procedure for MIC22400YTSE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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