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Monolithic Power Systems Inc. MP2338GTL-Z
- Part No.:
- MP2338GTL-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-583
- Datasheet:
-
MP2338GTL-Z.pdf
- Description:
- IC REG BUCK ADJ 3A SOT583
- Quantity:
- Payment:
- Shipping:
Inventory:3,574
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Product details
Overview
MP2338GTL-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter with integrated 115mΩ/55mΩ MOSFETs, delivering up to 3A continuous output current across 4.5V–28V input and 0.5V–16V output ranges. It operates at 450kHz fixed switching frequency with constant-on-time (COT) control, enabling fast transient response and tight regulation in space-constrained applications such as flat-panel displays and multi-function printers.
For engineers reviewing the MP2338GTL-Z datasheet, MP2338GTL-Z pinout, MP2338GTL-Z application, or MP2338GTL-Z equivalent, key selection criteria include its SOT583 package footprint, ±1.5% reference accuracy over temperature, power-good (PG) open-drain indicator, hiccup-mode over-current protection, and tON extension for improved dropout performance under high-duty-cycle conditions.
Technical Context
The MP2338GTL-Z employs constant-on-time (COT) control architecture with input- and output-voltage-dependent on-time modulation to maintain stable 450kHz operation across wide VIN/VOUT combinations. Its internal high-side and low-side N-channel MOSFETs operate in synchronous rectification mode, eliminating external diode losses and supporting >90% efficiency at 24V→5V/3A.
Protection logic integrates valley-current sensing for over-current detection, thermal shutdown at 150°C with 20°C hysteresis, and dual-threshold power-good monitoring (84–95% and 101–117% of 500mV reference). The device supports pre-biased start-up and features an internal 7.5μA soft-start current source configurable via external capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports industrial 24V rails and automotive cold-crank margins without external LDO pre-regulation. |
| Output Current | 3A continuous - sustains full load without derating at +85°C ambient on standard 2-layer PCB per EVL2338-TL-00A layout. |
| Switching Frequency | 450kHz typical - enables compact magnetics (e.g., 6.8μH) while maintaining EMI compliance in noise-sensitive consumer systems. |
| Reference Accuracy | ±1.5% over –40°C to +125°C - ensures stable output voltage across extended temperature range without calibration. |
| RDS(ON) | 115mΩ (HS), 55mΩ (LS) - minimizes conduction loss and thermal rise during high-current operation at light-to-moderate loads. |
| Quiescent Current | 160μA typical - extends battery life in always-on subsystems and enables efficient light-load PFM operation. |
| PG Thresholds | 90% rising / 84% falling VREF - provides robust power-rail sequencing margin for downstream processors and FPGAs. |
Pinout & Package
MP2338GTL-Z is housed in a thermally enhanced 8-pin SOT583 package (2.0mm × 2.5mm × 0.55mm), optimized for high-power density and low thermal resistance (θJA = 55°C/W on 2-layer EVL2338-TL-00A board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PG | Open-drain power-good indicator | Pulls low during startup, fault, or disable; requires external pull-up to VOUT for valid de-assertion when input fails. |
| 2 VIN | Main input supply rail | Accepts 4.5V–28V; must be decoupled with ≥22μF ceramic capacitor close to pin; connects to wide PCB trace for low impedance. |
| 3 SW | Switch node | Drives external inductor; high dv/dt node requiring minimized loop area and direct connection to BST capacitor negative terminal. |
| 4 GND | Power and signal ground reference | Primary return path for high-current switching; requires solid copper pour and multiple vias to inner ground plane. |
| 5 BST | Bootstrap supply for high-side driver | Connects to 0.1μF ceramic capacitor between BST and SW; enables floating gate drive for integrated HS-FET. |
| 6 EN | Enable control input | Digital logic input (1.2V threshold); max 6V rating; internal 1MΩ pull-down allows resistive divider for automatic VIN-based startup. |
| 7 SS | Soft-start timing node | Sinks 7.5μA current to charge external capacitor; sets monotonic output ramp time (e.g., 22nF → ~1.5ms). |
| 8 FB | Feedback voltage sense input | Monitors resistor divider output; regulates VOUT to 500mV reference; sensitive to noise-requires short trace and local bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-on-time (COT) control | Enables <10μs load transient recovery without external compensation components, simplifying design for dynamic loads like CPU cores. |
| Integrated 115mΩ/55mΩ MOSFETs | Eliminates external power switches and associated gate-drive complexity; reduces BOM count and layout area by >30% vs discrete solutions. |
| Hiccup-mode over-current protection | Prevents thermal runaway during sustained overload or short-circuit by cycling soft-start after fault detection-no latch-up or manual reset required. |
| tON extension at high duty cycle | Maintains regulation down to VIN – VOUT < 1.2V by extending on-time and reducing frequency to 250kHz minimum, improving dropout behavior. |
| Pre-biased output start-up | Supports hot-swap and rail-sequencing requirements by safely charging BST and SS nodes when VOUT is pre-charged before enable. |
Applications
| Game Consoles | Multi-Function Printers |
|---|---|
Use Scenario: Powering SoC core voltage rails (e.g., 1.2V/2A) and memory interfaces in compact handheld or home console designs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with COT control ensuring sub-10μs response to GPU/CPU burst loads. Use Value: Delivers >90% efficiency at 12V→1.2V conversion while occupying <5mm² PCB area in SOT583, reducing thermal mass and system cooling needs. |
Use Scenario: Generating 3.3V/3A for controller logic, scanner sensors, and USB interface circuitry in office MFPs. IC Role / Device Role / Timing Role: Main system supply with PG output coordinating firmware boot sequence and peripheral power-up timing. Use Value: Integrated OCP and thermal shutdown prevent damage during paper-jam-induced motor stall events, enhancing field reliability. |
| Power Meters | Flat Panel Televisions |
Use Scenario: Providing isolated 5V/2A auxiliary supply for metrology ICs and wireless communication modules in smart electricity meters. IC Role / Device Role / Timing Role: High-input-range buck converter accepting wide AC-DC adapter outputs (12–24V) with precise 5V regulation. Use Value: ±1.5% reference accuracy ensures stable ADC reference voltage across –40°C to +85°C operating range, meeting IEC 62053 accuracy class. |
Use Scenario: Generating 12V/3A backlight LED driver supply and 5V/2A main logic rail in slim LCD/LED TV power architectures. IC Role / Device Role / Timing Role: Secondary buck stage following PFC front-end; synchronized soft-start prevents inrush into large bulk capacitors. Use Value: 160μA quiescent current enables <100mW no-load consumption, satisfying Energy Star Tier 2 standby power requirements. |
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 |
|---|---|---|---|
| MP2338GQ-Z | Same die in QFN-10 (3mm×3mm) package; θJA = 45°C/W; includes exposed thermal pad for higher power dissipation. | Better thermal performance in high-ambient or sealed enclosures; requires rework of PCB layout and stencil design. | Select for >2.5A continuous load above +70°C ambient or where thermal headroom is constrained. |
| TPS54332DR | TI part with 3.5A rating, 500kHz freq, but uses external MOSFETs; 1.5% ref accuracy; no integrated BST capacitor support. | Higher peak current capability but larger solution size and added component count; lacks PG and tON extension. | Select only if 3.5A output or adjustable frequency (400–3000kHz) is mandatory and board area is not limiting. |
Compared with MP2338GTL-Z, MP2338GQ-Z offers superior thermal management in high-power-density designs, while TPS54332DR trades integration for flexibility in high-current or variable-frequency applications-neither matches the SOT583's combination of 3A capability, ultra-compact footprint, and advanced protection features.
Availability
MP2338GTL-Z is available at Aetrix Electronics and suitable for game consoles, multi-function printers, power meters, and flat-panel televisions requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MP2338GTL-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 power management ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP2338 belongs to MPS's high-efficiency synchronous buck converter product line, engineered for space-constrained consumer, industrial, and computing applications demanding minimal external components, fast transient response, and robust fault protection.
FAQ
What is the maximum recommended output current for MP2338GTL-Z at +85°C ambient?
The MP2338GTL-Z delivers 3A continuous output current at +85°C ambient when mounted on a 2-layer 63.5mm×63.5mm evaluation board (EVL2338-TL-00A) with 1oz copper and standard thermal relief. Derating is not required below this condition, as thermal shutdown activates only above 125°C junction temperature, and θJA = 55°C/W ensures sufficient margin.
Can MP2338GTL-Z operate with a 3.3V input supply?
No. The MP2338GTL-Z has a minimum input voltage of 4.5V due to its internal UVLO threshold of 3.96V (rising) and 3.63V (falling). Operation below 4.5V risks unstable regulation or failure to start. For 3.3V input applications, consider the MP2307 (3.3V–17V input) or MP2317 (2.5V–17V input) families instead.
How is the soft-start time calculated for a given SS capacitor value?
Soft-start time (tSS) is calculated using tSS = (CSS × VREF) / ISS, where CSS is in farads, VREF = 0.5V, and ISS = 7.5μA typical. For example, a 22nF capacitor yields tSS ≈ (22×10−9 × 0.5) / (7.5×10−6) ≈ 1.47ms. This defines the time for VOUT to ramp from 0% to 100% of target voltage.
Does MP2338GTL-Z support forced PWM mode to eliminate audible noise?
No. The MP2338GTL-Z automatically enters pulse-frequency modulation (PFM) mode at light loads to maximize efficiency and cannot be forced into continuous PWM operation. Its COT architecture inherently skips cycles below ~100mA load, which may cause low-frequency inductor whine in sensitive audio environments. For forced-PWM applications, consider the MP2315 or MP2318 series.
What is the purpose of the BST capacitor, and what value is recommended?
The BST capacitor forms a floating supply for the high-side MOSFET gate driver. It must be placed directly between BST and SW pins with low-ESR/ESL characteristics. A 0.1μF X7R ceramic capacitor is recommended-smaller values risk insufficient gate drive under heavy load, while larger values increase start-up time and do not improve performance.
How does the power-good (PG) pin behave during thermal shutdown?
During thermal shutdown, the PG pin immediately pulls low and remains low until the junction temperature falls below the hysteresis threshold (~130°C) and the output voltage re-stabilizes within 84–112% of VREF. This provides unambiguous fault signaling to system controllers, enabling graceful shutdown or thermal throttling before catastrophic failure.
Is MP2338GTL-Z compatible with MPS's MPL-AL series inductors?
Yes. The MP2338GTL-Z is characterized and optimized for use with MPS's MPL-AL series shielded power inductors (e.g., MPL-AL4022-6R8 for 6.8μH). These inductors feature low DCR, high saturation current, and consistent shielding-ensuring predictable efficiency, thermal performance, and EMI behavior per the MP2338 EVB design guidelines.
MP2338GTL-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-583
- 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):
- 28V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 26.6V
- Current - Output:
- 3A
- Frequency - Switching:
- 450kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-583
MP2338GTL-Z FAQ
1.How can I place an order for MP2338GTL-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2338GTL-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 MP2338GTL-Z reliable?
The price and inventory of MP2338GTL-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2338GTL-Z is usually 5 days.
3.What payment methods are accepted for MP2338GTL-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2338GTL-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2338GTL-Z?
MP2338GTL-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2338GTL-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 MP2338GTL-Z?
For technical support, including MP2338GTL-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2338GTL-Z requirements.
6.How does Aetrix verify that MP2338GTL-Z is sourced from the original manufacturer or authorized distributors?
All MP2338GTL-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 MP2338GTL-Z meets industry standards.
7.What is the process for return or replacement of MP2338GTL-Z?
All MP2338GTL-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2338GTL-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 MP2338GTL-Z part is unused and in its original packaging.
Return procedure for MP2338GTL-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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