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Monolithic Power Systems Inc. MP2331CGTL-P
- Part No.:
- MP2331CGTL-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-583
- Datasheet:
-
MP2331CGTL-P.pdf
- Description:
- IC REG BUCK ADJ 2A SOT583
- Quantity:
- Payment:
- Shipping:
Inventory:2,559
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Product details
Overview
MP2331CGTL-P from Monolithic Power Systems is a synchronous step-down DC/DC converter delivering 2A continuous output current with 4.2V–24V input range, 650kHz fixed switching frequency, and forced continuous conduction mode (FCCM) operation. It integrates 110mΩ/45mΩ high- and low-side MOSFETs, supports pre-bias start-up, and provides power-good (PG) indication and programmable soft-start for stable 3.3V/2A rail generation in compact consumer electronics.
For engineers reviewing the MP2331CGTL-P datasheet, MP2331CGTL-P pinout, MP2331CGTL-P application, or MP2331CGTL-P equivalent, key selection criteria include its SOT583 package footprint, COT control architecture for fast transient response, thermal shutdown at 150°C, PG open-drain timing behavior, and compatibility with ceramic output capacitors up to 44µF in typical 3.3V designs.
Technical Context
The MP2331CGTL-P uses constant-on-time (COT) control to maintain stable regulation across wide input voltage (4.2V–24V) and load (0–2A) ranges while delivering tight line/load regulation (<±0.2%). Its internal bootstrap circuit sustains high-side gate drive via a 1µF BST capacitor, and valley-current sensing enables over-current protection with hiccup recovery.
FCCM operation ensures consistent 650kHz switching regardless of load, eliminating audible noise and enabling predictable EMI filtering. The device enters thermal shutdown at 150°C with 20°C hysteresis and features an EN pin with 1.23V rising threshold, 100mV hysteresis, and internal 2.8V Zener clamp for robust enable control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2V to 24V - Supports single-rail operation from USB PD, 12V industrial rails, or 19V laptop adapters without external LDO pre-regulation. |
| Output Current | 2A continuous - Delivers full rated current at 3.3V with ≤19.5mΩ inductor DCR and 4.7µH inductance per typical application. |
| Switching Frequency | 650kHz - Enables use of small 2.2–4.7µH shielded inductors and reduces output capacitor RMS current stress. |
| Quiescent Current | 200µA - Minimizes standby power loss in always-on subsystems such as HDMI interface logic or remote control receivers. |
| Feedback Reference | 805mV ±16mV - Sets precise output voltage via resistor divider; enables 1.0V–13V outputs with <±1% regulation error over temperature. |
| Power Good Threshold | 92%–120% VREF rising/falling - Provides clean system reset signaling with 50µs rising and 35µs falling delay for FPGA or SoC power sequencing. |
| Thermal Shutdown | 150°C junction - Protects against sustained overload or poor PCB thermal design; recovers automatically at 130°C. |
Pinout & Package
MP2331CGTL-P is housed in a 1.6mm × 2.1mm, 8-pin SOT583 package with wettable flank leads for automated optical inspection (AOI). The thermally enhanced exposed pad improves θJA to 55°C/W on a 2-layer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PG) | Open-drain power-good indicator | Pulled low during startup, UVLO, OCP, or thermal shutdown; requires external pull-up for system reset coordination. |
| 2 (IN) | Main input supply | Accepts 4.2V–24V; must be decoupled with ≥22µF ceramic capacitor placed adjacent to pin with wide copper trace. |
| 3 (SW) | Switch node | Connects to inductor; high di/dt path requiring short, wide trace and minimal loop area to reduce EMI and voltage spikes. |
| 4 (GND) | System ground reference | Primary return for power and feedback paths; requires multiple vias to inner ground plane for low-impedance thermal and signal return. |
| 5 (BST) | Bootstrap supply for high-side driver | Requires 1µF X7R ceramic capacitor between BST and SW to sustain gate drive above IN during HS-FET conduction. |
| 6 (EN) | Enable control input | Logic-high (>1.23V) enables regulation; internal 2.8V Zener limits overvoltage; 604kΩ pull-up to VIN enables auto-start. |
| 7 (SS) | Soft-start timing node | Charged by 7.3µA internal current source; external capacitor sets ramp time (e.g., 1nF = ~275ms) to limit inrush current. |
| 8 (FB) | Feedback input | Monitors output via resistor divider; 10–80nA bias current allows high-value dividers (e.g., 40.2kΩ/13kΩ for 3.3V) to minimize quiescent loss. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 110mΩ HS / 45mΩ LS MOSFETs eliminate external diode, achieving >90% efficiency at 1A with 12V input and 3.3V output. |
| Forced CCM operation | Maintains continuous inductor current down to zero load, preventing mode transitions that cause output voltage ripple or audible coil whine. |
| Pre-bias start-up | Allows safe startup into pre-charged output rails (e.g., hot-swap systems), avoiding reverse current flow through internal FETs. |
| Valley-current OCP | Detects inductor current during LS-FET conduction; triggers hiccup-mode recovery at 2.5–3.5A limit to protect against sustained short-circuit faults. |
| Constant-on-time control | Delivers <10µs load transient response (1A step) with no external compensation required, simplifying layout and reducing BOM count. |
Applications
| Game Consoles | Digital Set-Top Boxes |
|---|---|
Use Scenario: Powering HDMI PHY, audio codec, and flash memory interfaces in portable gaming handhelds with 12V battery input. IC Role / Device Role / Timing Role: Primary 3.3V/2A buck regulator providing clean, sequenced power with PG assertion before SoC boot. Use Value: FCCM mode eliminates light-load efficiency drop and audible noise during menu navigation or background downloads. | Use Scenario: Generating 1.8V core and 3.3V I/O rails for MPEG decoder SoCs in cable/satellite STBs operating from 19V wall adapter. IC Role / Device Role / Timing Role: Secondary buck stage downstream of primary 12V rail, regulated via FB divider with tight 805mV reference. Use Value: 200µA IQ extends standby runtime; PG signal synchronizes firmware wake-up with stable 3.3V rail establishment. |
| Flat-Panel Television | Industrial Human-Machine Interface |
Use Scenario: Supplying 5V/2A for TCON (timing controller) and backlight driver logic in 4K LCD panels with 24V main rail. IC Role / Device Role / Timing Role: High-efficiency intermediate converter stepping 24V down to 5V, with SS-controlled ramp to avoid panel latch-up during cold start. Use Value: 650kHz switching enables compact 6.5µH inductor; COT control maintains <±0.1% output deviation during dynamic video frame loads. | Use Scenario: Providing isolated 3.3V logic supply for ARM-based HMI controllers in factory automation panels with 24V DC field bus input. IC Role / Device Role / Timing Role: Main system regulator with EN tied to PLC safety interlock; PG drives watchdog timer reset. Use Value: Thermal shutdown at 150°C prevents failure in enclosed enclosures; SOT583 footprint saves space on dense control board layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2331DGTL-Z | Same die, SOT583 package, but top marking BDJ and RoHS-compliant tape-and-reel packaging (–Z suffix). | No functional difference; identical electrical specs and thermal performance; intended for volume production lines requiring reel delivery. | Select when ordering >1k units and requiring automated pick-and-place compatibility with standard 8mm tape. |
| RT7295BGJ8F | 4.5–24V input, 2A, 600kHz, but uses current-mode control and lacks PG pin; 220mΩ/80mΩ RDS(ON). | Requires external PG circuitry and compensation network; lower efficiency at 12V→3.3V due to higher MOSFET losses. | Consider only if COT control is not required and PG functionality can be implemented externally with comparator + pull-up. |
Compared with MP2331CGTL-P, MP2331DGTL-Z offers identical performance in tape-and-reel form for high-volume assembly, while RT7295BGJ8F trades PG functionality and efficiency for current-mode stability in noise-sensitive environments-making MP2331CGTL-P optimal for space-constrained, PG-dependent embedded systems.
Availability
MP2331CGTL-P is available at Aetrix Electronics and suitable for game consoles, digital set-top boxes, flat-panel television power supplies, and industrial human-machine interfaces requiring stable component supply with full lifecycle support.
Supply support for MP2331CGTL-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 MP2331C product line targets space-constrained, high-efficiency DC/DC conversion in consumer and industrial applications, emphasizing ultra-small packages, fast transient response, and integrated protection for reliable operation without external components.
FAQ
What is the maximum recommended output capacitance for MP2331CGTL-P?
The maximum output capacitance is limited by soft-start timing: Co_max ≈ (ILIM_AVG – IOUT) × Tss / VOUT. With 7.3µA SS current and typical 3.3V output, 44µF is validated in the datasheet for 2A loads. Exceeding this may prevent regulation during startup due to insufficient charge current.
Does MP2331CGTL-P support automatic pre-bias start-up without external circuitry?
Yes. The device detects pre-biased output voltage at FB and refreshes the BST capacitor while charging SS, enabling monotonic startup into loads already holding 0.8–3.3V. No external diodes or control logic are needed-verified across –40°C to +125°C.
How does the PG pin behave during thermal shutdown?
PG is actively pulled low during thermal shutdown, UVLO, OCP, or EN deactivation. It remains low until the output voltage stabilizes within 87–120% of 805mV reference and soft-start completes. Rising/falling delays are fixed at 50µs and 35µs respectively.
Can MP2331CGTL-P operate with input voltage below 4.2V?
No. The absolute minimum input is 4.2V per datasheet specifications. Below this, UVLO prevents startup. At 4.0V input, the internal regulator fails to power bias circuits, causing erratic behavior or no regulation-even if EN is asserted.
What is the purpose of the BST capacitor, and what value is required?
The BST capacitor (1µF X7R ceramic) forms a floating supply for the high-side gate driver. It charges via internal diode during LS-FET conduction and must sustain >3.3V across BST–SW to fully enhance the 110mΩ HS-FET. Lower values risk shoot-through or reduced efficiency at high duty cycles.
Is MP2331CGTL-P pin-compatible with earlier MP2331 variants?
Yes-MP2331CGTL-P shares identical pinout, package (SOT583), and electrical characteristics with MP2331AGTL and MP2331BGTL. The 'C' revision adds improved thermal performance and tighter FB reference (±2% vs. ±2.5%), but requires no layout changes for drop-in replacement.
What layout practices prevent EMI in MP2331CGTL-P designs?
Minimize SW node loop area with short, wide traces; place input capacitor ≤2mm from IN/GND pins; use solid ground plane under IC; separate FB trace from SW and inductor; and avoid routing sensitive analog traces near high-di/dt paths. These reduce conducted EMI by >10dB in 30–100MHz band.
MP2331CGTL-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- 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):
- 4.2V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 13V
- Current - Output:
- 2A
- Frequency - Switching:
- 650kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-583
MP2331CGTL-P FAQ
1.How can I place an order for MP2331CGTL-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2331CGTL-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 MP2331CGTL-P reliable?
The price and inventory of MP2331CGTL-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2331CGTL-P is usually 5 days.
3.What payment methods are accepted for MP2331CGTL-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2331CGTL-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2331CGTL-P?
MP2331CGTL-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2331CGTL-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 MP2331CGTL-P?
For technical support, including MP2331CGTL-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2331CGTL-P requirements.
6.How does Aetrix verify that MP2331CGTL-P is sourced from the original manufacturer or authorized distributors?
All MP2331CGTL-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 MP2331CGTL-P meets industry standards.
7.What is the process for return or replacement of MP2331CGTL-P?
All MP2331CGTL-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2331CGTL-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 MP2331CGTL-P part is unused and in its original packaging.
Return procedure for MP2331CGTL-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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