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Monolithic Power Systems Inc. MP2344GJ-Z
- Part No.:
- MP2344GJ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MP2344GJ-Z.pdf
- Description:
- IC REG BUCK ADJ 2A TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:722
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Product details
Overview
MP2344GJ-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter with integrated 95mΩ high-side and 45mΩ low-side MOSFETs, delivering 2A continuous output current across a 7.5V–26V input range. It operates at a fixed 600kHz switching frequency in CCM mode, features internal soft-start, over-current protection with hiccup recovery, and thermal shutdown-designed for compact, low-EMI power rails in space-constrained industrial and consumer systems.
For engineers reviewing the MP2344GJ-Z datasheet, MP2344GJ-Z pinout, MP2344GJ-Z application, or MP2344GJ-Z equivalent, this device supports rapid design of efficient 3.3V/5V point-of-load supplies where input voltage range, thermal robustness, and EMI performance are critical selection criteria.
Technical Context
The MP2344GJ-Z uses peak-current-mode control with an internal 0.791V feedback reference and optimized compensation network, enabling stable regulation without external loop components in most designs. Its AAM (Advanced Asynchronous Modulation) light-load mode reduces quiescent current to 170μA while maintaining output accuracy.
It integrates a bootstrap driver with UVLO (2.2V rising threshold), internal VCC LDO powered from VIN, and cycle-by-cycle OCP triggered at 3A peak inductor current. Frequency foldback activates when FB drops below 396mV, improving short-circuit survivability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 26V - supports wide industrial and automotive battery-derived rails without pre-regulation. |
| Output Current | 2A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Switching Frequency | 600kHz ±100kHz - enables use of small 10μH inductors and reduces output filter size vs. lower-frequency converters. |
| RDS(ON) (HS/LS) | 95mΩ / 45mΩ - minimizes conduction loss at full load, supporting >90% efficiency at 12VIN/5VOUT. |
| Feedback Voltage | 791mV ±16mV - sets precise output voltage via resistor divider; enables 3.3V, 5V, and other custom outputs. |
| Soft-Start Time | 1.5ms (10%–90%) - prevents inrush current and output overshoot during power-up sequences. |
| OCP Threshold | 3A peak - provides margin above 2A rated load while enabling reliable short-circuit handling in hiccup mode. |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects die under sustained overload or poor PCB thermal design. |
Pinout & Package
MP2344GJ-Z is housed in a space-saving TSOT23-6 package (2.9mm × 1.6mm × 0.85mm), optimized for high-density PCB layouts and automated assembly. The exposed pad variant is not specified; standard TSOT23-6 thermal resistance is θJA = 62°C/W on a 2-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input supply rail | Accepts 7.5V–26V; requires local 22μF ceramic decoupling with low-ESR layout. |
| 2 SW | Switch node | Drives external inductor; high di/dt node requiring short, wide copper traces and minimal loop area. |
| 3 GND | Power ground reference | System return for all internal circuits; must connect to solid ground plane with multiple vias. |
| 4 BST | Bootstrap supply | Connects to SW via 0.1μF ceramic capacitor to bias high-side gate driver; optional external diode improves efficiency at 5VOUT. |
| 5 VCC | Internal LDO output | Supplies internal circuitry; decoupled with 0.1–0.22μF capacitor; can be externally biased from 5V rail via diode. |
| 6 FB | Feedback input | Senses output voltage via resistor divider; high-impedance node (<50nA bias) requiring short, noise-immune routing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated HS/LS MOSFETs | Eliminates need for external power switches and gate drivers, reducing BOM count and layout complexity. |
| Low-EMI Switching Edge | Optimized slew rate and SW anti-ringing reduce high-frequency radiation, easing EMC compliance in RF-sensitive devices. |
| Internal Soft Start | Prevents output overshoot and limits inrush current during startup-no external capacitor required. |
| AAM Light-Load Mode | Reduces quiescent current to 170μA while maintaining regulation, extending battery life in standby applications. |
| Hiccup-Mode OCP | Shuts down and auto-restarts during sustained overloads, limiting average power dissipation and preventing thermal runaway. |
| Wide Input Range | Supports direct connection to 12V/24V industrial buses or automotive batteries without upstream buck or LDO pre-regulation. |
Applications
| RF-Enabled Devices | Standby Power Supply |
|---|---|
|
Use Scenario: Powering cellular modem, Wi-Fi SoC, or BLE transceiver in IoT edge node with intermittent transmit bursts. IC Role / Device Role / Timing Role: Primary 3.3V/2A PoL regulator supplying core logic and RF front-end; maintains tight output regulation during fast load transients. Use Value: AAM mode extends battery runtime during idle periods; low-EMI operation avoids interference with sensitive RF receive paths. |
Use Scenario: Always-on auxiliary rail for real-time clock, memory retention, and wake-on-LAN circuitry in desktop PCs or smart displays. IC Role / Device Role / Timing Role: Standby converter operating continuously at <100mA; delivers stable 5V or 3.3V from main 12V or 24V bus. Use Value: 170μA quiescent current minimizes standby power draw; thermal shutdown ensures reliability during enclosure overheating events. |
| White Goods Control Board | Flat-Panel TV/Display Logic Rail |
|
Use Scenario: Powering MCU, touch controller, and sensor interface on refrigerator or washing machine main control board. IC Role / Device Role / Timing Role: Main 5V system rail sourced from 12V or 24V appliance bus; handles variable loads from motor drivers and display backlights. Use Value: 2A rating supports peak MCU + sensor + communication IC loads; wide input range accommodates unregulated transformer-derived supplies. |
Use Scenario: Generating 3.3V logic supply for TCON, HDMI receiver, and panel timing controller in LCD/LED TVs. IC Role / Device Role / Timing Role: Secondary regulated rail downstream of primary 12V supply; must meet strict ripple (<20mVpp) and transient response specs. Use Value: Fixed 600kHz frequency simplifies EMI filtering; internal compensation ensures stability with common 22μF ceramic output capacitors. |
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 |
|---|---|---|---|
| MP2338GJ-Z | Lower 6V–17V input range; 1.5A output; 1.2MHz switching frequency; same TSOT23-6 package. | Better suited for 12V-only systems needing higher frequency and smaller magnetics; insufficient for 24V industrial inputs. | Select when input is capped at 17V and board space demands higher fSW for smaller inductors. |
| RT7272BGJ8F | 7V–36V input; 2A output; 650kHz fSW; includes enable pin and power-good indicator; same 6-pin TSOT23. | Offers system-level monitoring (PGOOD) and precise enable control-valuable in multi-rail sequencing applications. | Choose when power sequencing, fault reporting, or extended 36V input tolerance is required. |
Compared with MP2344GJ-Z, MP2338GJ-Z trades input voltage headroom for higher switching frequency, while RT7272BGJ8F adds system integration features at the cost of slightly higher BOM count and different compensation behavior.
Availability
MP2344GJ-Z is available at Aetrix Electronics and suitable for RF-enabled devices, standby power supplies, and white goods control boards requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2344GJ-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 MP2344 belongs to MPS's high-efficiency synchronous buck converter product line, engineered for compact, low-EMI DC/DC conversion in industrial, consumer, and computing applications where thermal performance and ease of layout are critical.
FAQ
What is the minimum recommended output capacitance for stable operation?
The MP2344GJ-Z is stable with ≥22μF ceramic output capacitance (X5R/X7R). Lower values may cause instability or excessive ripple; typical designs use 22–100μF. ESR should be <10mΩ for ceramic types to ensure phase margin >45° across temperature and load.
Can MP2344GJ-Z operate with an external 5V bias on VCC?
Yes-VCC can be externally biased from a clean 5V rail via a Schottky diode (e.g., 1N5817), reducing power loss and heat generation inside the IC. This is especially beneficial in high-input-voltage applications where internal VCC LDO dissipation would otherwise increase.
Does MP2344GJ-Z require an external bootstrap diode?
No-bootstrap charging is fully internal using the SW node. However, adding an external diode from VOUT to BST improves efficiency at 5V output by reducing BST capacitor discharge losses; it is optional but recommended per MPS application notes.
What is the maximum achievable output voltage?
Maximum output is limited by duty cycle: VOUT(MAX) ≈ VIN(MIN) × DMAX = 7.5V × 0.93 ≈ 7.0V. For higher outputs, a flyback or SEPIC topology is required-the MP2344GJ-Z is strictly a step-down converter.
How does the hiccup-mode OCP behave during sustained short-circuit?
When FB falls below ~396mV, the MP2344GJ-Z enters hiccup mode: it shuts down for ~10ms, then attempts restart. Average short-circuit current is reduced to ~300mA, limiting junction temperature rise and enabling safe operation until fault removal.
Is the TSOT23-6 package lead-free and RoHS compliant?
Yes-MP2344GJ-Z is fully lead-free, halogen-free, and compliant with EU RoHS Directive 2011/65/EU. MSL rating is Level 1 (unlimited floor life at ≤30°C/60% RH), per ordering information table.
What inductor value is recommended for 12VIN/5VOUT/2A operation?
MPS recommends a 10μH inductor with ≥2.5A saturation current and <35mΩ DCR (e.g., MPL-AL5050-100). This balances efficiency (>92%), transient response, and physical size-verified in the MP2344 EV2344-J-00A evaluation board.
MP2344GJ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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):
- 7.5V
- Voltage - Input (Max):
- 26V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- 24.2V
- Current - Output:
- 2A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
MP2344GJ-Z FAQ
1.How can I place an order for MP2344GJ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2344GJ-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 MP2344GJ-Z reliable?
The price and inventory of MP2344GJ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2344GJ-Z is usually 5 days.
3.What payment methods are accepted for MP2344GJ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2344GJ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2344GJ-Z?
MP2344GJ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2344GJ-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 MP2344GJ-Z?
For technical support, including MP2344GJ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2344GJ-Z requirements.
6.How does Aetrix verify that MP2344GJ-Z is sourced from the original manufacturer or authorized distributors?
All MP2344GJ-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 MP2344GJ-Z meets industry standards.
7.What is the process for return or replacement of MP2344GJ-Z?
All MP2344GJ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2344GJ-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 MP2344GJ-Z part is unused and in its original packaging.
Return procedure for MP2344GJ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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