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Monolithic Power Systems Inc. MP8726EL-LF-P
- Part No.:
- MP8726EL-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-VFDFN Exposed Pad
- Datasheet:
-
MP8726EL-LF-P.pdf
- Description:
- IC REG BUCK ADJ 6A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,171
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Product details
Overview
MP8726EL-LF-P from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 120mΩ high-side and 20mΩ low-side MOSFETs, delivering up to 6A peak output current across a 4.5V–21V input range, fixed 500kHz switching frequency, and adjustable 0.8V output voltage - deployed in notebook I/O power rails and flat-panel display logic supplies.
For engineers reviewing the MP8726EL-LF-P datasheet, MP8726EL-LF-P pinout, MP8726EL-LF-P application, or MP8726EL-LF-P equivalent, key selection criteria include internal compensation, thermal shutdown at 150°C, 7A cycle-by-cycle OCP, EN/SYNC dual-function pin, and QFN3x4 package thermal resistance (θJA = 48°C/W).
Technical Context
The MP8726EL-LF-P operates in peak-current-mode control with fixed 500kHz oscillator and programmable sync range (300kHz–2MHz), enabling stable regulation under fast load transients. Its proprietary bootstrap charging circuit maintains gate drive for the high-side MOSFET using an external BST capacitor between SW and BST pins.
Internal 5V VCC regulator powers all control circuitry across full VIN range; feedback uses a precision 805mV reference with ±1% tolerance and 50nA bias current. Power Good (PG) provides open-drain status signaling with 90%/70% hysteresis relative to FB voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 21V - supports wide industrial and computing supply rails including 5V, 12V, and 19V adapters. |
| Output Current | 6A peak - sustains transient loads in CPU core I/O and GPU memory power domains without external current sensing. |
| Switching Frequency | Fixed 500kHz (±15%) - balances efficiency and EMI filtering component size; externally synchronizable to 300kHz–2MHz. |
| Feedback Reference | 805mV ±1.5% - enables precise output regulation down to 0.8V with standard resistor dividers. |
| Thermal Shutdown | 150°C activation - protects die during sustained overload or poor PCB thermal design; auto-recovery at ~140°C. |
| OCP Threshold | 7A cycle-by-cycle - prevents MOSFET failure during short-circuit events while maintaining soft-start integrity. |
| Package Thermal Resistance | θJA = 48°C/W - requires exposed pad soldered to ground plane for reliable 6A operation at +85°C ambient. |
Pinout & Package
MP8726EL-LF-P is housed in a thermally enhanced 3mm × 4mm, 14-pin QFN package with exposed thermal pad on underside. The package supports high-power density layouts via direct copper connection of the exposed pad to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input Supply Rail | Primary high-current path for 4.5–21V input; requires low-impedance decoupling and wide PCB traces. |
| 2–5 SW | Switch Node | Four paralleled switch outputs connect to inductor; shared node carries full AC switching current and must be minimized in loop area. |
| 6 BST | Bootstrap Supply | Connects to SW via 0.1–1µF ceramic capacitor to generate floating gate drive for high-side MOSFET. |
| 7 EN/SYNC | Enable & Clock Input | Dual-function pin: CMOS/TTL-compatible enable (1.3V threshold) or external sync clock input (300kHz–2MHz). |
| 8 FB | Voltage Feedback Sense | High-impedance input (50nA bias) monitoring resistor divider output; sets regulated VOUT = 0.805V × (1 + R1/R2). |
| 9 PG | Power Good Indicator | Open-drain output asserting high when FB ≥ 0.9×VFB and low when FB ≤ 0.7×VFB; used for system sequencing. |
| 11 VCC | Bias Regulator Output | Internally generated 5V supply for control circuitry; requires 0.1–0.22µF local decoupling. |
| 12–13 GND | Power Ground | Low-impedance return for power stage; must be connected directly to exposed pad and input/output capacitors. |
| 14 AGND | Analog Ground | Separate signal reference for FB, PG, and error amplifier; tied to GND only at single point on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 120mΩ HS + 20mΩ LS MOSFETs eliminate external FETs and drivers, reducing BOM count and layout complexity. |
| Internal Compensation | Optimized Type-II network eliminates need for external compensation components, accelerating design-in for 1.2–3.3V outputs. |
| Frequency Foldback | Reduces switching frequency to 25% of nominal when FB drops below 300mV - limits power dissipation during output short. |
| Soft-Start Time | Fixed 4ms ramp - prevents output overshoot and inrush current during power-up across all input voltages. |
| UVLO Threshold | 4.0V rising / 3.2V falling - ensures clean startup and shutdown without brown-out oscillation near minimum input. |
Applications
| Notebook I/O Power | Flat Panel Display Logic |
|---|---|
Use Scenario: Supplies 1.2V/3A to DDR3 memory I/O buffers and chipset southbridge rails in ultrabook platforms. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated, low-noise power with fast transient response to dynamic memory loads. Use Value: Internal 6A capability and 500kHz switching enable compact 2-layer PCB design without external current sense or loop compensation. |
Use Scenario: Powers 1.8V/4A timing controller (TCON) and scaler ICs in 24-inch LCD monitor main board. IC Role / Device Role / Timing Role: Fixed-frequency step-down converter providing stable logic rail with Power Good sequencing for display initialization. Use Value: PG pin with 20µs delay and 0.805V reference ensure accurate TCON reset timing and compatibility with JEDEC-compliant display firmware. |
| Distributed Telecom Power | Networking System Core |
Use Scenario: Generates 2.5V/5A intermediate bus for PoE-powered access point PHY and MAC subsystems. IC Role / Device Role / Timing Role: High-efficiency intermediate converter operating from 12V backplane, supporting dynamic load steps up to 3A/µs. Use Value: Current-mode control and 7A OCP withstand Ethernet surge-induced current spikes without latch-off or output collapse. |
Use Scenario: Delivers 3.3V/6A to FPGA configuration banks and Gigabit Ethernet PHYs in enterprise switch line cards. IC Role / Device Role / Timing Role: Main point-of-load regulator with EN/SYNC pin synchronized to system clock to reduce conducted EMI in dense backplane environments. Use Value: External sync capability (300kHz–2MHz) allows alignment with master clock, minimizing beat frequencies and easing EMC certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT6220HGQW | 4.5–18V input, 5A peak, 600kHz, no BST pin - uses charge pump instead of bootstrap; higher quiescent current (1.2mA vs 0.7mA). | Lacks EN/SYNC dual function and PG output; unsuitable for systems requiring power sequencing or external clock sync. | Select when footprint compatibility and lower cost outweigh need for PG signaling and sync flexibility. |
| TPS54620RGYR | 4.5–17V input, 6A continuous (not peak), 2.2MHz max, external compensation required; includes Eco-mode for light-load efficiency. | Requires external RC compensation network and separate PG supervisor; higher pin count (16-QFN) increases layout area. | Prefer when >1MHz operation is mandatory and design team has experience tuning Type-III compensation loops. |
Compared with RT6220HGQW and TPS54620RGYR, MP8726EL-LF-P uniquely integrates PG signaling, EN/SYNC duality, and internal compensation in a 14-pin QFN - reducing bill-of-materials and simplifying validation for mid-frequency, medium-power computing applications.
Availability
MP8726EL-LF-P is available at Aetrix Electronics and suitable for notebook systems, flat-panel displays, and distributed telecom power requiring stable component supply, RoHS-compliant packaging, and long-term industrial lifecycle support.
Supply support for MP8726EL-LF-P 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
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, headquartered in California and serving global industrial, computing, and communications markets since 1997.
The MP8726 belongs to MPS's high-current synchronous buck converter product line, engineered for space-constrained, thermally demanding applications where integration, reliability, and ease of use supersede ultra-high-frequency operation.
FAQ
What is the maximum recommended output current for continuous operation?
The MP8726EL-LF-P is rated for 6A peak output current, but continuous operation at 6A requires strict thermal management: PCB with 2oz copper, full-exposed-pad soldering to ≥2in² ground plane, and ambient temperature ≤+60°C. Derate to 4.5A at +85°C ambient per thermal simulation data in Rev. 0.92 datasheet.
Can the MP8726EL-LF-P operate with an input voltage below 4.5V?
No - the absolute minimum operating input voltage is 4.5V, enforced by internal UVLO with 4.0V rising threshold and 880mV hysteresis. Operation below 4.5V risks unstable regulation, premature shutdown, or failure to initiate soft-start; 3.3V rails require a pre-regulator stage.
How is the output voltage adjusted, and what is the minimum achievable value?
VOUT is set via external resistor divider on FB pin using VFB = 805mV nominal reference. Minimum output is 0.8V (per datasheet), achieved when R2 = 0Ω and R1 connects FB directly to VOUT - though practical minimum is 0.805V due to reference tolerance and layout parasitics.
Does the MP8726EL-LF-P support forced PWM mode or skip-cycle operation?
No - the MP8726EL-LF-P operates exclusively in peak-current-mode PWM with fixed frequency. It does not feature pulse-skipping, burst-mode, or forced-continuous conduction mode; light-load efficiency relies on low quiescent current (0.7mA) and optimized gate drive.
What is the purpose of the exposed thermal pad, and how must it be connected?
The exposed pad is electrically connected to GND and serves as primary thermal path. It must be soldered to a solid copper pour tied to ≥4 thermal vias (0.3mm diameter) connecting to inner ground planes. Leaving it unconnected degrades θJA by >25°C/W and risks thermal shutdown at <3A load.
Is an external bootstrap diode required for reliable operation?
An external bootstrap diode (e.g., 1N4148) is optional and recommended only when duty cycle exceeds 65% (i.e., VOUT > 0.65 × VIN). At 12V input/3.3V output (27.5% duty), internal bootstrap charging suffices; at 5V input/3.3V output (66%), external diode improves efficiency by ~1.2%.
How does the frequency foldback protection behave during output short-circuit?
When FB falls below 300mV (e.g., during short), the oscillator frequency reduces to 25% of nominal (e.g., 125kHz from 500kHz), lowering switching losses and junction temperature. This extends safe short-circuit time from <100ms to >500ms before thermal shutdown activates at 150°C.
MP8726EL-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 21V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 18.9V
- Current - Output:
- 6A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x4)
MP8726EL-LF-P FAQ
1.How can I place an order for MP8726EL-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8726EL-LF-P 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 MP8726EL-LF-P reliable?
The price and inventory of MP8726EL-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8726EL-LF-P is usually 5 days.
3.What payment methods are accepted for MP8726EL-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8726EL-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8726EL-LF-P?
MP8726EL-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8726EL-LF-P 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 MP8726EL-LF-P?
For technical support, including MP8726EL-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8726EL-LF-P requirements.
6.How does Aetrix verify that MP8726EL-LF-P is sourced from the original manufacturer or authorized distributors?
All MP8726EL-LF-P 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 MP8726EL-LF-P meets industry standards.
7.What is the process for return or replacement of MP8726EL-LF-P?
All MP8726EL-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP8726EL-LF-P, 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 MP8726EL-LF-P part is unused and in its original packaging.
Return procedure for MP8726EL-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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