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Monolithic Power Systems Inc. MP2229GQ-P
- Part No.:
- MP2229GQ-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-PowerVFQFN
- Datasheet:
-
MP2229GQ-P.pdf
- Description:
- IC REG BUCK ADJ 6A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,116
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Product details
Overview
MP2229GQ-P from Monolithic Power Systems is a high-frequency synchronous step-down DC/DC converter with integrated 40mΩ/18mΩ MOSFETs, delivering 6A continuous output current across a 4.5V–21V input range and adjustable 0.6V–VIN×0.95 output voltage. It supports external frequency synchronization (300kHz–2MHz), programmable soft-start, pre-bias start-up, and low-power mode for PFM operation - deployed in DSL/cable modems and telecom distributed power systems.
For engineers reviewing the MP2229GQ-P datasheet, MP2229GQ-P pinout, MP2229GQ-P application, or MP2229GQ-P equivalent, key selection criteria include its 6A output capability at 21V max input, QFN-14 (3mm×3mm) thermal performance (θJA = 60°C/W), hiccup-mode OCP, and dual-mode control (CCM/PFM) enabled via LPM pin - all critical for compact, high-efficiency point-of-load designs.
Technical Context
The MP2229GQ-P employs fixed-frequency peak current-mode control with internal 0.6V reference and error amplifier driving COMP node; switching cycle is initiated by internal clock or synchronized to external 300kHz–2MHz signal on FREQ/SYNC pin. Its bootstrap circuit charges BST via SW–BST capacitor (recommended 0.1µF) with internal UVLO (2.03V rising threshold) and optional external diode support for VIN < 5V or high-duty-cycle operation.
Low-power mode is implemented via comparator comparing VCOMP against externally set VLPM threshold (≥1.2V); below this, internal clock is blocked to enable pulse-skipping PFM, reducing light-load quiescent current to 400–500μA. EN pin enables/disables the IC with 1.28–1.65V rising threshold and internal 5.6V Zener clamp, eliminating need for pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 21V - supports wide industrial and telecom input rails including 12V and 19V systems without external regulators. |
| Output Current | 6A continuous - delivers full rated load with thermal shutdown protection at 150°C junction temperature. |
| Internal MOSFET RDS(ON) | 40mΩ (HS) / 18mΩ (LS) - enables high efficiency (>92% typical at 12V→1V/6A) and reduces external component count. |
| Switching Frequency | Programmable 200kHz–2.1MHz via resistor or sync clock - allows EMI optimization and inductor size reduction (e.g., 1µH at 500kHz). |
| Feedback Reference | 600mV ±6mV (–40°C to +125°C) - sets precise output voltage with external resistor divider; supports 0.6V minimum output. |
| Soft-Start Current | 10μA typical - controls ramp rate of output voltage using external SS capacitor; ensures monotonic start into pre-biased loads. |
| Quiescent Current | 400–500μA in active mode - balances light-load efficiency and transient response in always-on systems. |
Pinout & Package
MP2229GQ-P is housed in a thermally enhanced 3mm × 3mm QFN-14 package with exposed thermal pad (Pin 3), supporting high-power density PCB layouts and θJA = 60°C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 12, 13, 14 | GND | Power ground return path; requires large copper pour connected to input/output capacitor negatives for low-impedance thermal and EMI paths. |
| 2, 11 | SW | Switch node connecting internal HS/LS MOSFETs; must use wide PCB traces and multiple vias to minimize switching loss and ringing. |
| 3, Exposed Pad | IN | Main input supply (4.5V–21V); connects directly to low-ESR input capacitor bank placed within 2mm of pins. |
| 4 | EN | Enable control with 1.28–1.65V rising threshold; floating or pulled high enables operation; internal 5.6V Zener eliminates external pull-up. |
| 5 | LPM | Low-power mode select: ≥1.2V enables PFM; grounded forces continuous conduction mode (CCM) for stable light-load regulation. |
| 6 | FB | Feedback input referenced to 0.6V internal reference; connects to resistor divider tap for output voltage setting and loop compensation. |
| 7 | SS | Soft-start timing node charged by internal 10μA current source; external capacitor determines monotonic output ramp time. |
| 8 | FREQ/SYNC | Frequency programming/synchronization input: resistor-to-GND sets fSW; external 300kHz–2MHz clock synchronizes switching edge. |
| 9 | VCC | Internal 5V LDO output powering control circuitry; requires 0.1µF ceramic decoupling capacitor placed adjacent to pin. |
| 10 | BST | Bootstrap supply for high-side gate driver; requires capacitor between BST and SW (0.1µF typical) with optional 10Ω series resistor. |
Key Features
| Feature | Design Value |
|---|---|
| External frequency synchronization | Supports 300kHz–2MHz external clock on FREQ/SYNC pin - enables system-level EMI reduction and deterministic timing across multiple converters. |
| Pre-bias start-up capability | Monotonic start into pre-charged outputs - prevents reverse current flow and ensures safe power sequencing in multi-rail systems. |
| Hiccup-mode over-current protection | Enters periodic restart after sustained overload or short-circuit - limits average fault current and die temperature during extended faults. |
| Adjustable low-power mode transition | LPM pin accepts externally set voltage (≥1.2V) to define CCM-to-PFM crossover point - optimizes efficiency vs. ripple trade-off per application. |
| Integrated bootstrap charging circuit | Self-contained BST regulator with 2.03V UVLO and internal charge path - eliminates need for external diode except under high-duty-cycle or low-VIN conditions. |
Applications
| DSL Modem Power Supply | Cable Modem Core Rail |
|---|---|
|
Use Scenario: Provides 1.0V/6A core voltage for Broadcom BCM3383/BCM3390 SoCs in DSL access terminals operating from 12V adapter input. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with pre-bias start-up ensuring clean boot sequence when auxiliary rails power up first. Use Value: 6A output headroom supports CPU burst currents; 500kHz switching enables compact 1µH inductor and low-profile 22µF input capacitance. |
Use Scenario: Generates 1.2V/6A for cable modem DOCSIS 3.1 PHY processors (e.g., Intel Puma 6) under dynamic load transients. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with hiccup-mode OCP protecting against PHY rail shorts during firmware updates. Use Value: External SYNC input aligns switching edges with system clock domain, reducing conducted EMI in RF-sensitive upstream/downstream paths. |
| Set-Top Box SoC Core | Telecom Distributed Power |
|
Use Scenario: Delivers 1.8V/6A to ARM-based STB application processors (e.g., Amlogic S905X3) with rapid 2A/µs load steps during video decode. IC Role / Device Role / Timing Role: Current-mode controlled buck with fast transient response; FB pin interfaces with external RC compensation network for stability. Use Value: 40mΩ/18mΩ MOSFETs achieve >93% efficiency at 12V→1.8V/6A, minimizing heatsink requirements in sealed enclosures. |
Use Scenario: Supplies 2.5V/6A to FPGA I/O banks and SerDes transceivers in carrier-grade optical line terminals (OLTs). IC Role / Device Role / Timing Role: Synchronous step-down converter with thermal shutdown (150°C) and -40°C to +125°C operation for uncooled chassis environments. Use Value: QFN-14 (3mm×3mm) package enables dense board layout; 60°C/W θJA supports 6A load without forced air in 1RU rack units. |
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 |
|---|---|---|---|
| MP2238GQ-Z | Higher 30V input rating, 8A output, 35mΩ/15mΩ MOSFETs; same QFN-14 package and pinout. | Targets 24V industrial inputs and higher current FPGA cores; not drop-in for 21V max systems due to different UVLO thresholds. | Select when input exceeds 21V or output current >6A is required; verify EN/LPM logic compatibility and thermal margin. |
| TPS546B24RVFT | Pin-compatible 6A buck with PMBus interface, 4.5–18V input, 0.5–3.3V output; uses external MOSFETs and requires more external components. | Used where digital telemetry (voltage/current/temp monitoring) and dynamic voltage scaling are needed - absent in MP2229GQ-P. | Choose only if PMBus telemetry, adaptive voltage positioning, or multi-phase scalability are mandatory; adds BOM cost and layout complexity. |
Compared with MP2229GQ-P, MP2238GQ-Z extends input voltage and output current but increases thermal design complexity, while TPS546B24RVFT trades integration for digital control - making MP2229GQ-P optimal for cost-sensitive, analog-controlled 6A PoL applications requiring minimal external parts.
Availability
MP2229GQ-P is available at Aetrix Electronics and suitable for DSL modems, cable modems, and telecom distributed power systems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MP2229GQ-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, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP2229 belongs to MPS's high-efficiency synchronous buck converter product line, engineered for space-constrained, high-current point-of-load applications in broadband communications and infrastructure equipment.
FAQ
What is the maximum recommended input voltage for MP2229GQ-P?
The absolute maximum input voltage is 24V, but the recommended operating maximum is 21V per datasheet specifications. Operation above 21V risks exceeding internal MOSFET breakdown ratings and may trigger thermal shutdown under sustained load. The device is characterized and guaranteed for reliable operation up to 21V across –40°C to +125°C junction temperature.
Can MP2229GQ-P operate with an input voltage below 4.5V?
No - the minimum recommended input voltage is 4.5V, defined by the VIN under-voltage lockout (UVLO) rising threshold of 4.1V ±0.25V. Below 4.5V, the internal 5V VCC regulator cannot maintain regulation, causing erratic operation or failure to start. The device will remain disabled until VIN rises above the UVLO hysteresis threshold (3.5V falling).
How does the LPM pin affect efficiency and output ripple?
When LPM ≥1.2V, the IC enters pulse-frequency modulation (PFM) mode at light loads (<100mA), reducing quiescent current to ~400μA and improving efficiency. However, PFM increases output voltage ripple due to variable switching frequency; grounding LPM forces continuous conduction mode (CCM), maintaining fixed frequency and lower ripple at the cost of higher light-load current.
Is an external bootstrap diode required for MP2229GQ-P?
An external bootstrap diode (e.g., 1N4148) is optional and only recommended when VIN < 5V or duty cycle >65% (e.g., 12V→3.3V), where internal BST charging may become insufficient. In standard 12V→1V/1.2V applications, the internal bootstrap circuit with 0.1µF BST capacitor is sufficient and validated per datasheet test conditions.
What is the purpose of the exposed thermal pad on the QFN-14 package?
The exposed pad (Pin 3) serves as the primary thermal conduction path from the die to the PCB. It must be soldered to a solid copper thermal plane connected to GND, with ≥4 thermal vias (0.3mm diameter) to inner ground layers. This configuration achieves the specified θJA = 60°C/W and prevents thermal shutdown during 6A continuous operation.
Does MP2229GQ-P support output voltages below 0.6V?
No - the internal feedback reference is fixed at 0.6V ±6mV, and the datasheet specifies minimum output voltage as 0.6V. Attempting to set lower outputs via resistor divider violates the error amplifier's common-mode input range and results in regulation failure. For sub-0.6V rails, a dedicated low-VREF converter or post-regulator is required.
How is soft-start time calculated for MP2229GQ-P?
Soft-start time (tSS) is determined by tSS (ms) = (CSS × 0.6V) / 10μA, where CSS is the external capacitor value in nanofarads. For example, a 100nF capacitor yields a 6ms soft-start period. This linear ramp ensures monotonic output rise and prevents inrush current into pre-biased loads.
MP2229GQ-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-PowerVFQFN
- 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):
- 4.5V
- Voltage - Input (Max):
- 21V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 19.95V
- Current - Output:
- 6A
- Frequency - Switching:
- 300kHz ~ 1.8MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x3)
MP2229GQ-P FAQ
1.How can I place an order for MP2229GQ-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2229GQ-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 MP2229GQ-P reliable?
The price and inventory of MP2229GQ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2229GQ-P is usually 5 days.
3.What payment methods are accepted for MP2229GQ-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2229GQ-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2229GQ-P?
MP2229GQ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2229GQ-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 MP2229GQ-P?
For technical support, including MP2229GQ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2229GQ-P requirements.
6.How does Aetrix verify that MP2229GQ-P is sourced from the original manufacturer or authorized distributors?
All MP2229GQ-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 MP2229GQ-P meets industry standards.
7.What is the process for return or replacement of MP2229GQ-P?
All MP2229GQ-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2229GQ-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 MP2229GQ-P part is unused and in its original packaging.
Return procedure for MP2229GQ-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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