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Monolithic Power Systems Inc. MP3424AGG-Z
- Part No.:
- MP3424AGG-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-PowerVFQFN
- Datasheet:
-
MP3424AGG-Z.pdf
- Description:
- IC REG BOOST ADJ 3.1A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,261
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Product details
Overview
MP3424AGG-Z from Monolithic Power Systems is a synchronous, current-mode, step-up DC-DC converter with true output disconnect, configurable switching and average load current limits, and inrush current limiting. It operates from 2V–5.5V input to deliver up to 5.5V/3.1A output, supports 580kHz fixed-frequency operation, integrates N- and P-channel MOSFETs (RDS(ON) = 11mΩ/17mΩ), and targets battery-powered boost applications requiring precise current control and zero-output leakage during shutdown.
For engineers reviewing the MP3424AGG-Z datasheet, MP3424AGG-Z pinout, MP3424AGG-Z application, or MP3424AGG-Z equivalent, this device is selected for high-efficiency, low-inrush, output-isolated boost conversion in compact portable systems where input voltage may dip below 2.8V and load current must be tightly regulated across temperature and line variations.
Technical Context
The MP3424AGG-Z implements fixed-frequency (580kHz) current-mode PWM control with dual-loop regulation: a voltage loop using an internal 0.805V reference and FB feedback, and a programmable current loop supporting both cycle-by-cycle switching limit (via ILIM resistor) and average load current limit (via SENSE/SOUT sense resistor). Its start-up sequence includes linear charge mode (270mA inrush-limited), step-down mode (for short-circuit recovery), and boost mode-each governed by VOUT thresholds relative to VIN.
True output disconnect is achieved via integrated P-channel MOSFET body diode elimination, enabling full VOUT isolation during EN=low and preventing reverse current flow. Protection features include over-current (OCP), short-circuit (SCP), over-temperature (OTP), and over-voltage (OVP at 6.5V), all implemented with internal sensing and autonomous recovery timing (e.g., 40µs SCP restart).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2V to 5.5V - enables direct operation from single-cell Li-ion (2.8V min) or two-cell alkaline without pre-regulation. |
| Output Voltage Range | 3V to 5.5V - adjustable via external resistor divider on FB pin; supports USB PD 5V and optical module bias rails. |
| Switching Frequency | 580kHz (±10%) - allows use of small 1–2.2µH inductors (e.g., MPL-AL5030-1R5) and reduces output capacitor size. |
| Peak Switching Current Limit | Up to 9.5A - set by resistor from ILIM to AGND; provides robust short-circuit handling and inductor saturation margin. |
| Average Load Current Limit | Configurable via SENSE/SOUT sense resistor (e.g., 30mV threshold); enables precise constant-current sourcing for LED drivers or battery charging stages. |
| Efficiency | Up to 97% at 3.1A/5V from 2.8V input - achieved via integrated low-RDS(ON) MOSFETs and synchronous rectification. |
| Quiescent Current | 320µA on OUT, 13.5µA on IN - minimizes standby drain in always-on battery backup units. |
Pinout & Package
MP3424AGG-Z is housed in a thermally enhanced QFN-14 package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad (PGND-connected) for efficient heat dissipation in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SENSE | Current-sense input | Connects to one side of external sense resistor; used with SOUT to set average load current limit (VOCL = 30mV typical). |
| 2,13 PGND | Power ground | High-current return path for SW and OUT; must be tied to thermal pad for optimal thermal performance. |
| 3,14 SW | Switch node | Drain-source connection point of internal N- and P-channel MOSFETs; requires short, wide PCB trace to minimize EMI and voltage spikes. |
| 4,5,6 OUT | Regulated output | Drain of internal synchronous P-FET; supplies load and powers internal bias when VOUT > VIN; fully disconnected during shutdown. |
| 7 EN | Enable control | Active-high logic input (VEN_H ≥ 1.2V); pulls internal circuitry into low-power shutdown state with <1µA ISD. |
| 8 IN | Input supply | Battery or source input; powers startup bias; once VOUT > VIN, internal bias shifts to OUT for improved efficiency. |
| 9 ILIM | Current limit programming | Resistor-to-AGND sets peak switching current; pulled low during average current limit activation to regulate IL. |
| 10 AGND | Analog ground | Reference for FB, SENSE, ILIM; must be separated from PGND and connected at single point near IC for noise immunity. |
| 11 FB | Feedback input | Compares divided VOUT against 0.805V reference; determines output voltage setting (VOUT = 0.805V × (1 + R1/R2)). |
| 12 SOUT | Current-sense output | Connects to other side of external sense resistor; forms differential pair with SENSE for accurate load current monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| True output disconnect | Zero reverse current and VOUT collapse to 0V during EN=low - eliminates battery drain in powered-off states and prevents backfeed in multi-rail systems. |
| Configurable average load current limit | Set via external sense resistor (e.g., 10mΩ → 3A limit); enables constant-current operation for optical transceivers or USB power delivery compliance. |
| 270mA linear charge inrush limit | Prevents input surge during cold-start into large output capacitors - critical for stable operation in power banks with 1000µF+ output banks. |
| Integrated soft start and compensation | 3ms internal soft-start ramp and fully compensated EA eliminate need for external compensation network - reduces BOM count and layout sensitivity. |
| 580kHz fixed switching frequency | Enables consistent EMI filtering design and predictable inductor sizing; supports ceramic capacitors ≥22µF for stable regulation under dynamic loads. |
Applications
| Power Bank Output Stage | Optical Transceiver Bias |
|---|---|
|
Use Scenario: Boosting 2.8–4.2V Li-ion battery to regulated 5V for USB-A/C output ports in portable power banks. IC Role / Device Role / Timing Role: Primary synchronous boost regulator with output disconnect, inrush limiting, and SCP for safe hot-plug insertion. Use Value: Delivers 3.1A continuous output at >95% efficiency while preventing input surge and ensuring zero-load leakage during standby. |
Use Scenario: Providing stable 3.3V or 5V bias to SFP+/QSFP optical modules requiring precise current-limited startup and fault isolation. IC Role / Device Role / Timing Role: Constant-voltage/constant-current hybrid supply with fast SCP response (<40µs recovery) and thermal foldback. Use Value: Enables reliable hot-swap operation and protects sensitive laser diodes from overcurrent events during module insertion or cable faults. |
| USB-C Accessory Power | Portable Medical Sensor Supply |
|
Use Scenario: Generating 5V from single-cell battery for USB-C accessories (e.g., dongles, adapters) with strict inrush and EMI requirements. IC Role / Device Role / Timing Role: Compact, low-noise boost converter with integrated soft start and 580kHz switching for minimal filter footprint. Use Value: Meets USB-IF inrush limits (<100mA/ms) and maintains <100mVpp ripple under 1.5A load without external LDO post-regulation. |
Use Scenario: Powering low-power biosensors and analog front-ends in handheld diagnostic devices requiring ultra-low quiescent current and shutdown isolation. IC Role / Device Role / Timing Role: Always-on boost stage with 13.5µA IN quiescent current and true output disconnect to preserve battery life between measurements. Use Value: Extends single-cell battery runtime beyond 72 hours in sleep mode while enabling instant wake-up with controlled output ramp. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 2.7V minimum input; no true output disconnect; 1.2MHz switching; requires external Schottky for reverse blocking. | Lacks output isolation during shutdown - unsuitable for systems requiring zero standby leakage or bidirectional rail separation. | Select when higher switching frequency and smaller inductors are prioritized over output disconnect and sub-2.7V start-up. |
| MAX17222ETA+ | Lower 0.4V start-up; 500kHz switching; no average current limit; only cycle-by-cycle OCP; QFN-12 (2mm×2mm). | Cannot implement precise constant-current load regulation - limited to voltage-only applications like basic LED biasing. | Select for ultra-low-input-voltage applications (e.g., coin cell) where average current limiting is unnecessary and footprint is identical. |
Compared with TPS61088RHLR and MAX17222ETA+, MP3424AGG-Z uniquely combines sub-2V start-up, true output disconnect, and dual-mode current limiting - making it the only choice for battery-powered systems demanding both low-voltage operation and guaranteed zero-output leakage during standby.
Availability
MP3424AGG-Z is available at Aetrix Electronics and suitable for power banks, optical transceivers, and portable medical sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP3424AGG-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 expertise in DC-DC conversion, motor drivers, and LED lighting controllers.
The MP3424A belongs to MPS's configurable-current boost converter product line, designed specifically for battery-powered applications needing precise current regulation, minimized inrush, and seamless output isolation - addressing gaps left by traditional fixed-limit boost ICs.
FAQ
What is the minimum input voltage required for MP3424AGG-Z to start switching?
The MP3424AGG-Z starts up from as low as 2V input. Its UVLO rising threshold is 1.2–1.45V, but functional switching begins once VIN exceeds ~2V and VOUT reaches 1.7V during linear charge mode. This enables reliable operation from deeply discharged single-cell Li-ion batteries down to 2.8V nominal.
How is true output disconnect implemented, and what is its benefit?
True output disconnect is achieved by integrating a P-channel MOSFET whose body diode is actively blocked during shutdown, eliminating reverse conduction. When EN is low, OUT is fully isolated from IN, allowing VOUT to drop to 0V and preventing battery drain or backfeed - essential for multi-rail systems and always-on standby modes.
Can MP3424AGG-Z operate in constant-current mode only, without voltage regulation?
No - the MP3424AGG-Z is a CC/CV controller that requires FB feedback for voltage regulation. However, average load current limiting (via SENSE/SOUT) can dominate under overload, effectively enforcing constant-current behavior while maintaining voltage loop stability through internal compensation.
What is the recommended inductor value and why?
MPS recommends 1.5µH (e.g., MPL-AL5030-1R5) for most applications. This value balances peak current ripple (~30%), efficiency (>95% at 3.1A), and physical size. Lower values increase ripple and EMI; higher values reduce ripple but increase size and may degrade transient response due to slower current slew rates.
Does MP3424AGG-Z require external compensation components?
No - the error amplifier is internally compensated. Only RC compensation on the ILIM pin is required when using average load current limiting (not needed for switching current limit only). This eliminates external compensation networks and simplifies layout while maintaining loop stability across operating conditions.
How does the MP3424AGG-Z handle short-circuit conditions?
Upon short-circuit detection (VOUT < 50% of setpoint), the device shuts down within microseconds, holds off for 40µs, then restarts the full start-up sequence (linear charge → step-down → boost). During step-down mode, it limits current to ~0.27A, preventing thermal runaway and enabling safe recovery without external intervention.
Is the QFN-14 (2mm×2mm) package lead-free and RoHS-compliant?
Yes - MP3424AGG-Z is lead-free, halogen-free, and fully compliant with the EU RoHS directive. The top marking "LU" indicates MP3424AGG, "Y" is year code, and "LLLL" is lot number; full MSL rating is Level 1 per JEDEC J-STD-020.
MP3424AGG-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3.1A
- Frequency - Switching:
- 580kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (2x2)
MP3424AGG-Z FAQ
1.How can I place an order for MP3424AGG-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3424AGG-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 MP3424AGG-Z reliable?
The price and inventory of MP3424AGG-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3424AGG-Z is usually 5 days.
3.What payment methods are accepted for MP3424AGG-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3424AGG-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3424AGG-Z?
MP3424AGG-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3424AGG-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 MP3424AGG-Z?
For technical support, including MP3424AGG-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3424AGG-Z requirements.
6.How does Aetrix verify that MP3424AGG-Z is sourced from the original manufacturer or authorized distributors?
All MP3424AGG-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 MP3424AGG-Z meets industry standards.
7.What is the process for return or replacement of MP3424AGG-Z?
All MP3424AGG-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3424AGG-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 MP3424AGG-Z part is unused and in its original packaging.
Return procedure for MP3424AGG-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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