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Monolithic Power Systems Inc. MP2240GJ-Z
- Part No.:
- MP2240GJ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MP2240GJ-Z.pdf
- Description:
- IC REG BUCK ADJ 3A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,569
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Product details
Overview
MP2240GJ-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter IC with integrated 80mΩ/30mΩ MOSFETs, delivering 3A continuous output current across 6V–16V input and adjustable 0.8V–14.4V output. It operates at fixed 800kHz switching frequency with current-mode control, supports external soft-start and AAM-based power-save mode, and targets compact I/O power rails in space-constrained systems.
For engineers reviewing the MP2240GJ-Z datasheet, MP2240GJ-Z pinout, MP2240GJ-Z application, or MP2240GJ-Z equivalent, key selection criteria include its TSOT-23-8 package thermal performance (θJA = 100°C/W), 0.807V feedback reference accuracy (±1.6mV), hiccup-mode OCP response, and bootstrap-driven high-side gate drive architecture.
Technical Context
The MP2240 employs peak-current-mode control with an internal 0.807V reference and error amplifier driving COMP voltage to regulate output. Its fixed-frequency oscillator (660–940kHz) initiates PWM cycles, while cycle-by-cycle over-current protection triggers hiccup mode when FB drops below ~0.4V during short-circuit faults.
Internal 5V LDO (VCC) powers control circuitry across full VIN range; bootstrap capacitor between SW and BST enables floating high-side driver with UVLO (2.2V rising threshold). AAM pin allows programmable transition between asynchronous modulation (light-load efficiency) and forced CCM (transient response).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 16V - supports wide industrial and notebook input rails without external pre-regulation |
| Output Current | 3A continuous - sufficient for core logic, DDR termination, or USB PD sink rails |
| Switching Frequency | 800kHz typical - enables use of ≤3.3μH inductors and reduces EMI filter size |
| Feedback Reference | 0.807V ±1.6mV - sets output voltage via resistor divider; enables 0.8V minimum VOUT |
| HS/LS RDS(ON) | 80mΩ / 30mΩ - minimizes conduction loss at 3A, supporting >90% efficiency at mid-load |
| OCP Threshold | 5A typical - provides 67% headroom above 3A rating for transient surge margin |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects die during sustained overload or poor PCB thermal design |
Pinout & Package
MP2240GJ-Z is housed in an 8-pin TSOT-23 package (2.9mm × 1.6mm × 0.85mm), optimized for thermal dissipation on 2-layer PCBs with θJA = 100°C/W (JESD51-7, 4-layer reference). Exposed pad not present; GND pin (Pin 4) serves as primary thermal and electrical reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AAM | Advanced Asynchronous Modulation control | External resistor divider sets light-load mode transition point; drives high to force CCM |
| 2 IN | Main power input | Accepts 6–16V; requires low-ESR ceramic capacitor placed adjacent with wide traces/vias |
| 3 SW | Switch node | Connects to inductor and BST capacitor; swings from −0.3V to VIN; high di/dt node |
| 4 GND | System ground reference | Return path for output, feedback, and internal regulator; must connect to solid ground plane |
| 5 BST | Bootstrap supply | Capacitor between BST and SW forms floating rail for high-side gate driver |
| 6 SS | Soft-start timing | 11μA current source charges external capacitor; determines ramp time to avoid inrush |
| 7 VCC | Internal 5V LDO output | Powers control circuitry; decoupled with 0.1–0.22μF ceramic cap close to pin |
| 8 FB | Feedback input | Senses resistor divider output; internal 0.807V reference sets regulation point |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing conduction loss and enabling >92% peak efficiency |
| External soft-start | Programmable ramp time prevents input inrush and output overshoot during power-up |
| Hiccup-mode OCP | Auto-restarts after fault clearance; limits average short-circuit power to <1W under dead-short |
| Fixed 800kHz operation | Enables predictable EMI filtering and consistent loop compensation across input/output conditions |
| TSOT-23-8 footprint | Reduces board area by >40% vs. SOIC-8; compatible with standard pick-and-place and reflow profiles |
Applications
| Notebook I/O Power Rail | Digital Set-Top Box Core Supply |
|---|---|
Use Scenario: Powers USB controller, PCIe switch, or SATA PHY in ultrabook mainboard with 12V input. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3V/3A with fast load transient response to burst data traffic. Use Value: Integrated MOSFETs and 800kHz switching eliminate discrete FETs and reduce BOM count by 4 components versus controller+MOS solution. | Use Scenario: Supplies 1.2V/3A to ARM Cortex-A series SoC in cable/satellite STB with 12V intermediate bus. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with AAM mode extending standby battery life. Use Value: 0.807V reference tolerance ensures ±1.5% output accuracy across temperature, meeting SoC core voltage spec. |
| Flat-Panel Display Logic Supply | Distributed Telecom Power |
Use Scenario: Generates 5V/3A for display timing controller and interface ICs in 24" LCD monitor. IC Role / Device Role / Timing Role: Main system rail converter operating from 12V or 16V panel supply with hiccup protection against ESD-induced shorts. Use Value: Thermal shutdown at 150°C prevents latch-up during ambient temperature excursions in enclosed display enclosures. | Use Scenario: Provides isolated 3.3V/3A for FPGA configuration and management MCU in remote radio unit. IC Role / Device Role / Timing Role: Compact secondary-side buck stage downstream of 48V-to-12V intermediate bus. Use Value: 6–16V input range accommodates 12V bus droop under load, maintaining regulation without brownout reset. |
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 |
|---|---|---|---|
| MP2315GJ-Z | Higher 6A rating, 500kHz fSW, same TSOT-23-8 package, lower RDS(ON) (45mΩ/22mΩ) | Better suited for higher-current loads; reduced switching loss but larger inductor required | Select when >3.5A output or lower quiescent current (<100μA) is required |
| TPS563201DDFR | 3A, 6V–17V, 500kHz, SOT-23-6 package, no AAM pin, integrated compensation | Lacks programmable light-load mode; smaller package but higher thermal resistance (θJA = 210°C/W) | Select when board space is tighter and light-load efficiency is secondary to cost |
Compared with MP2240GJ-Z, MP2315GJ-Z delivers higher current with improved thermal performance in identical footprint, while TPS563201DDFR trades AAM flexibility and thermal capability for lower component count and cost in less thermally demanding designs.
Availability
MP2240GJ-Z is available at Aetrix Electronics and suitable for notebook I/O power, digital set-top box core supplies, flat-panel display logic rails requiring stable component supply, high-volume consumer electronics production, and industrial embedded power subsystems.
Supply support for MP2240GJ-Z 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 distribution since 1997.
The MP2240 belongs to MPS's high-frequency synchronous buck converter product line, engineered for compact, efficient DC/DC conversion in portable and space-constrained computing and consumer electronics.
FAQ
What is the minimum recommended output voltage for MP2240GJ-Z?
The MP2240GJ-Z supports output voltages down to 0.8V, set by the feedback resistor divider using its internal 0.807V reference. This enables direct regulation for modern low-voltage processors and memory interfaces without external reference scaling.
Does MP2240GJ-Z require an external bootstrap diode?
No external bootstrap diode is required under typical operation. An optional IN4148 diode from VCC to BST is recommended only when VOUT ≥ 3.3V and duty cycle exceeds 65%, to improve high-side gate drive efficiency during heavy load.
How is soft-start time calculated for MP2240GJ-Z?
Soft-start time is determined by tSS(ms) = (0.8V × CSS(nF)) / 11μA, where CSS is the capacitor connected from SS pin to GND. For example, a 100nF capacitor yields ~7.3ms ramp time.
What thermal derating applies to MP2240GJ-Z at 85°C ambient?
At TA = 85°C, maximum continuous power dissipation is limited to (150°C − 85°C) / 100°C/W = 0.65W. With typical 85% efficiency at 3A/3.3V, this corresponds to ~2.6A output current before thermal shutdown activates.
Can MP2240GJ-Z operate with input voltage below 6V?
No. The absolute minimum operating input voltage is 6V per datasheet specifications. Input below 6V causes UVLO activation, disabling switching. The INUV threshold is 4.9V (rising), but guaranteed regulation begins only at 6V.
What is the purpose of the AAM pin in practical design?
The AAM pin allows designers to optimize light-load efficiency versus transient response: a low AAM voltage (e.g., 0.3V) extends AAM mode duration for higher efficiency at <100mA, while a high AAM voltage (e.g., 0.6V) forces earlier CCM entry for better line/load regulation during dynamic loads.
Is MP2240GJ-Z RoHS-compliant and lead-free?
Yes. MP2240GJ-Z is fully RoHS-compliant and lead-free, per MPS quality assurance documentation. All packaging materials and die attach meet EU Directive 2011/65/EU requirements without exemptions.
MP2240GJ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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):
- 6V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 14.4V
- Current - Output:
- 3A
- Frequency - Switching:
- 800kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MP2240GJ-Z FAQ
1.How can I place an order for MP2240GJ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2240GJ-Z 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 MP2240GJ-Z reliable?
The price and inventory of MP2240GJ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2240GJ-Z is usually 5 days.
3.What payment methods are accepted for MP2240GJ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2240GJ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2240GJ-Z?
MP2240GJ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2240GJ-Z 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 MP2240GJ-Z?
For technical support, including MP2240GJ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2240GJ-Z requirements.
6.How does Aetrix verify that MP2240GJ-Z is sourced from the original manufacturer or authorized distributors?
All MP2240GJ-Z 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 MP2240GJ-Z meets industry standards.
7.What is the process for return or replacement of MP2240GJ-Z?
All MP2240GJ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2240GJ-Z, 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 MP2240GJ-Z part is unused and in its original packaging.
Return procedure for MP2240GJ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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