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Monolithic Power Systems Inc. MP2238GD-P
- Part No.:
- MP2238GD-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-PowerVFQFN
- Datasheet:
-
MP2238GD-P.pdf
- Description:
- IC REG BUCK ADJ 8A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,987
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Product details
Overview
MP2238GD-P from Monolithic Power Systems is a high-efficiency, synchronous step-down DC/DC converter delivering 8A continuous output current with 4.2V–18V input range, 600kHz switching frequency, and constant-on-time (COT) control for fast transient response. It integrates 22mΩ/10mΩ high- and low-side MOSFETs in a thermally enhanced 12-pin QFN 2mm×3mm package and supports adjustable output voltage down to 0.6V - used in flat-panel TV power rails and digital set-top box core supplies.
For engineers reviewing the MP2238GD-P datasheet, MP2238GD-P pinout, MP2238GD-P application, or MP2238GD-P equivalent, key selection criteria include hiccup-mode over-current protection, thermal shutdown at 150°C, bootstrap capacitor requirements (0.1µF), FB reference accuracy (±1% over –40°C to +125°C), and minimum on/off time constraints (70ns/170ns) critical for high-duty-cycle operation.
Technical Context
The MP2238GD-P implements constant-on-time (COT) control with internal ramp compensation to stabilize regulation without requiring external ESR-dependent output capacitors. Its dual-MOSFET architecture uses valley-current sensing for cycle-by-cycle over-current protection and features integrated dead-time generation to prevent shoot-through.
It operates across three load regimes: PWM mode above critical current (~2.5A at VIN=12V/VOUT=1V), PFM skip mode below that threshold for >90% light-load efficiency, and low-dropout extension mode where on-time extends and frequency drops to 260kHz when duty cycle exceeds 85% - enabling stable regulation down to VOUT = 0.6V even at VIN = 4.2V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2V to 18V - supports wide industrial and consumer input rails including 5V, 12V, and 18V battery or adapter sources. |
| Output Current | 8A continuous - enables single-chip core supply for SoCs, FPGAs, and multi-core processors in compact designs. |
| Switching Frequency | 600kHz ±20% - balances size (small inductor/capacitor) and efficiency; fixed by internal oscillator, not externally programmable. |
| RDS(ON) | 22mΩ (HS) / 10mΩ (LS) - minimizes conduction loss at full load, enabling >92% peak efficiency at 12VIN/3.3VOUT. |
| Reference Voltage | 600mV ±1% (–40°C to +125°C) - sets output via external resistor divider; enables precise 0.6V–12V adjustment with <±1.5% total output error. |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects die during sustained overload or poor PCB thermal design; resumes operation at ≤130°C. |
| Enable Threshold | 1.2V typical rising threshold with 200mV hysteresis - allows direct connection to 3.3V/5V logic or VIN for automatic startup; internal 2MΩ pull-down ensures default-off state. |
Pinout & Package
MP2238GD-P is housed in a thermally optimized 12-pin QFN package measuring 2mm × 3mm with exposed thermal pad (EP). The package supports high-power density layouts and requires solder paste stencil optimization for EP reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable control input | Digital enable with 2MΩ internal pull-down; 20V absolute max rating allows direct VIN tie; rising threshold 1.2V ensures noise immunity. |
| 2,8 SW | Power switch node | High-current path connecting internal HS/LS FETs; must be routed with wide copper trace and minimal loop area to reduce EMI and switching loss. |
| 3 BST | Bootstrap supply | Connects to 0.1µF ceramic capacitor between SW and BST to generate floating gate drive for HS-FET; critical for proper high-side turn-on. |
| 4,5,6,7 GND | Power ground | Primary return path for high-current loops; must connect directly to thermal pad and system ground plane using multiple vias to minimize impedance and thermal resistance. |
| 9 IN | Main input supply | Accepts 4.2V–18V; requires local 22µF ceramic decoupling placed adjacent to pin; wide trace routing essential for low AC impedance. |
| 10 AGND | Analog ground reference | Separate ground for feedback and bias circuitry; must be tied to PGND at single point near IC to avoid noise coupling into FB path. |
| 11 FB | Feedback input | Senses output voltage via external resistor divider; 50nA max input current enables high-value resistors (e.g., 100kΩ/22.1kΩ for 3.3V) minimizing quiescent loss. |
| 12 VCC | Internal bias supply | Regulated internal rail; requires 1µF ceramic capacitor placed as close as possible to pin and GND to suppress switching noise and ensure stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-On-Time (COT) Control | Enables <10µs load transient recovery without external compensation components - simplifies design for dynamic loads like CPU burst modes. |
| Hiccup-Mode Over-Current Protection | Enters periodic restart after 3 or 31 cycles depending on UV threshold violation - limits average short-circuit current to ~1.5A, preventing thermal runaway. |
| Low-RDS(ON) Integrated MOSFETs | 22mΩ HS + 10mΩ LS reduces full-load conduction loss by >40% vs. discrete solutions - enables 8A output in 2mm×3mm footprint without external switches. |
| Pre-Bias Start-Up Support | Disables switching until soft-start voltage exceeds pre-biased output - prevents reverse current flow into powered downstream circuits during hot-plug scenarios. |
| Adjustable Soft-Start Time | Internally fixed 1ms (10%→90%) - eliminates need for external SS capacitor while preventing output overshoot during cold start. |
Applications
| Flat-Panel TV Power Rail | Digital Set-Top Box Core Supply |
|---|---|
|
Use Scenario: Powers 1.2V/3.3V SoC cores and memory interfaces in 4K UHD television mainboards with tight board space and thermal constraints. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 1.2V at up to 8A with COT control ensuring rapid response to video processing load transients. Use Value: Eliminates need for external MOSFETs and compensation network - reduces BOM count by ≥5 parts and PCB area by >30% vs. controller+discrete solution. |
Use Scenario: Supplies 1.8V/2.5V FPGA I/O banks and 3.3V USB/PCIe interface rails in compact set-top box enclosures with limited airflow. IC Role / Device Role / Timing Role: High-density synchronous buck converter operating at 600kHz to fit small filter components while maintaining >90% efficiency at partial load. Use Value: Internal 10mΩ LS-FET and PFM light-load mode achieve >88% efficiency at 100mA - extending standby runtime and reducing heatsink requirements. |
| Distributed Power System Bus Converter | Industrial Display Backlight Driver Supply |
|
Use Scenario: Serves as intermediate bus converter (12V→5V/3.3V) in modular industrial HMIs where input voltage varies from 9V–18V due to battery or unregulated DC sources. IC Role / Device Role / Timing Role: Wide-input buck regulator with UVLO (3.85V rising) and thermal shutdown (150°C) ensuring robust operation under brownout and ambient temperature extremes. Use Value: 4.2V–18V input range and hiccup OCP allow reliable operation across automotive-grade input fluctuations without external supervision circuitry. |
Use Scenario: Generates 5V/12V bias for LED driver ICs in medical-grade diagnostic displays requiring low-noise, ripple-free supply rails. IC Role / Device Role / Timing Role: Low-ripple synchronous buck with ceramic-capacitor-only output filtering (enabled by internal ramp compensation) minimizing conducted EMI. Use Value: Built-in ramp compensation removes ESR dependency - permits use of ultra-low-ESR X7R ceramics, cutting output ripple to <15mVpp at 8A. |
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 |
|---|---|---|---|
| MP2238DQ-LF-Z | Same die, 12-pin QFN 2mm×3mm but with wettable flank leads for automated optical inspection (AOI); identical electrical specs and thermal performance. | Preferred for high-volume SMT lines requiring AOI compatibility; no change in layout or thermal design. | Select when AOI capability is required in production; pin-compatible drop-in replacement with same footprint and thermal pad. |
| RT7295BGJ8F | 6A rated, 4.5V–18V input, 600kHz, but uses current-mode control and requires external compensation; RDS(ON) 28mΩ/14mΩ higher than MP2238GD-P. | Better suited for designs needing adjustable frequency or external loop tuning; less efficient at 8A due to higher conduction loss. | Choose only if COT control is not required and design allows extra compensation components; not suitable for 8A continuous loads without derating. |
Compared with MP2238DQ-LF-Z, MP2238GD-P offers identical regulation performance but lacks wettable flanks for AOI - making it optimal for cost-sensitive, non-AOI production. Versus RT7295BGJ8F, MP2238GD-P delivers higher current, lower RDS(ON), and simpler layout, but sacrifices frequency adjustability and external loop control.
Availability
MP2238GD-P is available at Aetrix Electronics and suitable for flat-panel TV power rails, digital set-top box core supplies, and distributed power system bus converters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2238GD-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 power management ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP2238GD-P belongs to MPS's high-current synchronous buck converter product line, engineered for space-constrained consumer and industrial applications demanding >8A output, wide input range, and minimal external component count.
FAQ
What is the maximum recommended PCB temperature rise for MP2238GD-P at 8A continuous load?
At 8A continuous output with 12V input and 3.3V output, the MP2238GD-P case temperature rise is typically 45°C above ambient on a 4-layer evaluation board (EV2238-D-00A). To maintain junction temperature below 125°C, keep ambient ≤80°C and ensure ≥4 cm² of 2-oz copper connected to the thermal pad with ≥6 thermal vias - exceeding this rise risks thermal shutdown activation.
Can MP2238GD-P operate with a 0.47µH inductor?
Yes - MP2238GD-P supports inductors from 0.47µH to 10µH. A 0.47µH inductor is valid for high-frequency, low-ripple designs at light-to-moderate loads, but at 8A it increases peak inductor current and RMS losses. For full 8A operation, a 1.0µH–2.2µH inductor with ≤11mΩ DCR is recommended to limit ∆IL to ~30% of load current and maintain >90% efficiency.
Does MP2238GD-P require an external bootstrap diode?
No - MP2238GD-P integrates bootstrap charging circuitry and operates reliably with only a 0.1µF ceramic capacitor between BST and SW pins. An external diode (e.g., 1N4148) is optional only when VIN < 5V and duty cycle >65% (e.g., 3.3V output from 4.5V input), where it improves BST voltage stability and efficiency by ~1–2%.
How does the hiccup over-current protection behave during a sustained short circuit?
Under sustained short, MP2238GD-P enters hiccup mode after either 3 cycles (if UV2 threshold is triggered) or 31 cycles (if only UV1 is active), disabling switching for ~10ms before attempting restart. This limits average short-circuit current to ~1.2A and junction temperature rise to <10°C per cycle - preventing thermal damage while allowing safe recovery once fault clears.
Is MP2238GD-P compatible with ceramic-only output capacitors?
Yes - unlike traditional COT controllers, MP2238GD-P includes internal ramp compensation that stabilizes regulation without requiring ESR-based damping. It supports pure ceramic output capacitors (e.g., 2×47µF X7R 0805), reducing output ripple to <12mVpp at 8A and eliminating electrolytic/tantalum parts for improved reliability and lifetime.
What is the minimum output voltage achievable with MP2238GD-P?
The MP2238GD-P supports output voltages down to 0.6V, set by its internal 600mV reference and FB pin architecture. With precision resistors (e.g., 0.1% tolerance), 0.6V can be achieved directly; for lower voltages, external resistor networks or voltage dividers are not supported - the IC is not designed for sub-0.6V operation.
How does the EN pin behave during power-up when connected directly to VIN?
When EN is tied to VIN, MP2238GD-P enables automatically once VIN exceeds the 3.85V UVLO rising threshold. The internal 2MΩ pull-down ensures EN remains low during initial power ramp, preventing premature startup. No external RC delay is needed - the device sequences internal reference and bias rails before enabling switching, ensuring controlled soft-start.
MP2238GD-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 12-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):
- 4.2V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 12V
- Current - Output:
- 8A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-QFN (2x3)
MP2238GD-P FAQ
1.How can I place an order for MP2238GD-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2238GD-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 MP2238GD-P reliable?
The price and inventory of MP2238GD-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2238GD-P is usually 5 days.
3.What payment methods are accepted for MP2238GD-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2238GD-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2238GD-P?
MP2238GD-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2238GD-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 MP2238GD-P?
For technical support, including MP2238GD-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2238GD-P requirements.
6.How does Aetrix verify that MP2238GD-P is sourced from the original manufacturer or authorized distributors?
All MP2238GD-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 MP2238GD-P meets industry standards.
7.What is the process for return or replacement of MP2238GD-P?
All MP2238GD-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2238GD-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 MP2238GD-P part is unused and in its original packaging.
Return procedure for MP2238GD-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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