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Microchip Technology MIC4950YFL-T5
- Part No.:
- MIC4950YFL-T5
- Manufacturer:
- Microchip Technology
- Package:
- 10-VDFN Exposed Pad
- Datasheet:
-
MIC4950YFL-T5.pdf
- Description:
- IC REG BUCK ADJ 5A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,515
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Product details
Overview
MIC4950YFL-T5 from Micrel is a synchronous buck regulator delivering 5A output current with Hyper Speed Control™ ripple-based regulation, 3.3MHz switching frequency, and 95% peak efficiency-designed for processor core/I/O voltage regulation from 3.3V/5V buses in space-constrained DTVs and set-top boxes.
For engineers reviewing the MIC4950YFL-T5 datasheet, MIC4950YFL-T5 pinout, MIC4950YFL-T5 application, or MIC4950YFL-T5 equivalent, key selection criteria include its 0.625V feedback reference, pre-biased start-up capability, integrated low-RDS(ON) MOSFETs (30Ω P-channel / 25Ω N-channel), thermal shutdown at 150°C, and support for 1µH inductors with 10µF ceramic output capacitance.
Technical Context
The MIC4950YFL-T5 implements an adaptive Constant-ON-Time control architecture with three internal timers (min ON time, max ON time, min OFF time) that shifts regulation between valley FB ripple (low duty cycle) and peak FB ripple (high duty cycle) to maintain stability across input voltage and load transients.
It separates analog and power ground paths (AGND vs. PGND), requires independent decoupling on AVIN (1µF) and PVIN (≥10µF), and integrates internal ripple injection-eliminating need for external ripple injection unless nonstandard feedback dividers or large CF values are used.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports direct regulation from common 3.3V and 5V system rails without intermediate LDOs. |
| Output Current | 5A continuous - sufficient for high-current processor I/O domains and FPGA auxiliary rails. |
| Switching Frequency | Up to 3.3MHz - enables use of ultra-small 1µH inductors and reduces output filter size/cost. |
| Feedback Reference | 0.625V ±1.2% - sets precise output voltage via external resistor divider; supports outputs as low as 0.7V. |
| Efficiency | Up to 95% at 5A - minimizes thermal load in sealed enclosures like set-top boxes and DVD players. |
| Shutdown Current | 0.01µA - enables ultra-low-power standby modes in consumer electronics with battery backup. |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects against sustained overload or poor heatsinking in compact DFN packages. |
Pinout & Package
The MIC4950YFL-T5 is housed in a 10-pin 3mm × 4mm DFN package with exposed thermal pad (EP), optimized for high-power density and thermal performance (θJA = 35°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, EP | PGND | Power ground return for high-current SW node; EP must be soldered to PCB thermal plane for thermal management. |
| 3, 8 | PVIN | Main power input (2.7–5.5V); internally connected pins require single 10µF ceramic bypass to PGND. |
| 4 | AVIN | Analog supply for control circuitry; requires dedicated 1µF ceramic cap to AGND to isolate switching noise. |
| 5 | AGND | Analog ground reference; must be routed separately from PGND and joined at single point near IC. |
| 6 | FB | Feedback input referenced to 0.625V internal reference; connects to resistor divider from VOUT to AGND. |
| 7 | PG | Open-drain Power Good output; requires external pull-up to VOUT to signal valid regulation (88% threshold). |
| 9 | EN | Logic-enable input; 0.5–1.2V threshold; drives device into 0.01µA shutdown when pulled low. |
| 10 | SW | Switch node output; connects directly to inductor; high dv/dt demands careful routing away from sensitive analog traces. |
Key Features
| Feature | Design Value |
|---|---|
| Hyper Speed Control™ topology | Adaptive Constant-ON-Time + min-OFF-time modulation enables stable 3.3MHz operation with ultra-fast transient response (<1µs recovery). |
| Safe pre-biased start-up | Allows reliable turn-on when output capacitor is already charged-critical for hot-swap and multi-rail sequencing systems. |
| Integrated MOSFETs | Low RDS(ON) (30Ω P-ch / 25Ω N-ch) eliminates external FETs and gate drivers, reducing BOM count and layout complexity. |
| Internal ripple injection | Eliminates need for external RC network on FB pin under standard conditions-simplifies design and improves reliability. |
| Power Good (PG) output | Open-drain status flag enables system-level power sequencing and fault monitoring without additional supervisor ICs. |
Applications
| DTV Power Rails | Set-Top Box Core Supply |
|---|---|
Use Scenario: Regulating 1.2V/1.8V core and I/O voltages for MPEG decoder SoCs in digital television receivers. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise DC power with fast load-step response to handle video decode bursts. Use Value: 3.3MHz switching and 1µH inductor enable compact 4-layer PCB layout while maintaining <1% output voltage deviation during 0–5A load steps. | Use Scenario: Supplying 2.5V/3.3V I/O rails for tuners, demodulators, and HDMI interface ICs in cable/satellite set-top boxes. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with pre-biased start-up supporting hot-plug firmware updates and multi-rail power sequencing. Use Value: 95% peak efficiency and 35°C/W θJA allow full 5A operation within 70°C ambient without forced air cooling. |
| Printer Engine Control | DVD Player Motor & Logic Supply |
Use Scenario: Powering stepper motor drivers and real-time MCU subsystems in all-in-one inkjet/laser printers. IC Role / Device Role / Timing Role: Robust buck converter handling repetitive 0–4A pulsed loads from motor commutation while maintaining logic rail stability. Use Value: Thermal shutdown (150°C) and current limit (5.5–10A) prevent latch-up during motor stall conditions without external protection circuitry. | Use Scenario: Delivering clean 1.8V/2.5V supplies to DVD servo controllers, laser diode drivers, and audio DACs. IC Role / Device Role / Timing Role: Low-ripple, low-noise DC-DC regulator minimizing EMI coupling into sensitive analog audio paths. Use Value: Ultra-low output ripple (enabled by 3.3MHz operation and 10µF ceramic output cap) ensures <100µV RMS noise on audio supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2359DJ-LF-P | 4A rated, 2MHz max frequency, 0.8V ref, no pre-bias start-up | Lacks safe start-up into pre-biased output; lower current rating limits use in high-pulse-load printer engines | Select when cost sensitivity outweighs need for 5A headroom or pre-bias sequencing. |
| TPS54560QDGQRQ1 | 5A, 2.5MHz, automotive-grade (-40°C to +125°C), 0.8V ref, integrated soft-start | Higher quiescent current (120µA vs. 0.01µA), no PG output, larger SOIC-8 footprint | Prefer for automotive infotainment where AEC-Q100 qualification and extended temperature margin are mandatory. |
Compared with MP2359DJ-LF-P and TPS54560QDGQRQ1, the MIC4950YFL-T5 uniquely combines 5A capability, 3.3MHz operation, pre-biased start-up, and 0.01µA shutdown in a thermally efficient 3mm×4mm DFN-making it optimal for consumer electronics requiring minimal board area and aggressive power sequencing.
Availability
MIC4950YFL-T5 is available at Aetrix Electronics and suitable for DTVs, set-top boxes, and DVD players requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.
Supply support for MIC4950YFL-T5 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
Micrel Inc. was a U.S.-based semiconductor company specializing in power management, timing, and interface ICs before its acquisition by Microchip Technology in 2015.
The MIC4950 product line was developed for high-frequency, high-current DC-DC conversion in space-constrained consumer electronics-emphasizing fast transient response, minimal external components, and seamless integration into multi-rail power architectures.
FAQ
What is the minimum recommended output capacitor value for stable operation of the MIC4950YFL-T5?
The MIC4950YFL-T5 is designed for stable operation with a minimum 10µF ceramic output capacitor. Using X5R or X7R dielectrics is recommended to maintain effective capacitance under DC bias. Reducing below 10µF may compromise loop stability and increase output ripple beyond specification, especially at full 5A load and 3.3MHz switching.
Does the MIC4950YFL-T5 support output voltage sequencing in multi-rail systems?
Yes, the MIC4950YFL-T5 supports controlled sequencing via its EN pin and Power Good (PG) output. The open-drain PG signal can drive the EN pin of downstream regulators, enabling cascaded turn-on. Its safe start-up into pre-biased outputs further ensures reliable operation when other rails power up first-critical in complex SoC power trees.
Can the MIC4950YFL-T5 operate with an input voltage below 2.7V?
No-the MIC4950YFL-T5 has a specified input voltage range of 2.7V to 5.5V. Operation below 2.7V violates the Absolute Maximum Ratings and may cause UVLO activation (2.5V typical turn-on threshold) or unpredictable regulation. For sub-2.7V inputs, a different regulator such as the MIC24045 must be selected.
How does the MIC4950YFL-T5 achieve ultra-fast transient response?
The MIC4950YFL-T5 achieves ultra-fast transient response through its Hyper Speed Control™ architecture-a proprietary ripple-based control scheme with adaptive Constant-ON-Time modulation and internal ripple injection. This eliminates traditional error amplifier delay, enabling sub-microsecond recovery from 0–5A load steps while maintaining stability across input and output variations.
Is the MIC4950YFL-T5 pin-compatible with other members of the MIC49xx family?
No-MIC4950YFL-T5 uses a unique 10-pin DFN-10L pinout distinct from the 8-pin SOIC variant (MIC4950YFM). Pin functions differ significantly (e.g., PVIN is split across pins 3 & 8 in DFN but single-pin in SOIC; AGND/PGND separation is more stringent in DFN). Direct substitution requires PCB redesign and layout verification per the DFN landing pattern.
MIC4950YFL-T5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- Hyper Speed Control®
- Package/Case:
- 10-VDFN Exposed Pad
- 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):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.625V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 5A
- Frequency - Switching:
- Up to 3.3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x4)
MIC4950YFL-T5 FAQ
1.How can I place an order for MIC4950YFL-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4950YFL-T5 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 MIC4950YFL-T5 reliable?
The price and inventory of MIC4950YFL-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC4950YFL-T5 is usually 5 days.
3.What payment methods are accepted for MIC4950YFL-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4950YFL-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4950YFL-T5?
MIC4950YFL-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4950YFL-T5 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 MIC4950YFL-T5?
For technical support, including MIC4950YFL-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4950YFL-T5 requirements.
6.How does Aetrix verify that MIC4950YFL-T5 is sourced from the original manufacturer or authorized distributors?
All MIC4950YFL-T5 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 MIC4950YFL-T5 meets industry standards.
7.What is the process for return or replacement of MIC4950YFL-T5?
All MIC4950YFL-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC4950YFL-T5, 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 MIC4950YFL-T5 part is unused and in its original packaging.
Return procedure for MIC4950YFL-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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