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Monolithic Power Systems Inc. MP3422GG-Z
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- Part No.:
- MP3422GG-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-PowerVFQFN
- Datasheet:
-
MP3422GG-Z.pdf
- Description:
- IC REG BOOST ADJ 6.5A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,339
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Product details
Overview
MP3422GG-Z from Monolithic Power Systems is a synchronous step-up DC-DC converter IC with true output disconnect, designed for battery-powered systems requiring regulated 5V output from inputs as low as 1.9V. It delivers up to 2.5A at 5V from 2.8V input, features 600kHz fixed-frequency current-mode control, integrated 13mΩ NMOS and 18mΩ PMOS switches, and supports >6.5A peak switch current limit.
For engineers reviewing the MP3422GG-Z datasheet, MP3422GG-Z pinout, MP3422GG-Z application, or MP3422GG-Z equivalent, key selection criteria include its 2×2mm QFN-14 package, 43µA quiescent current in normal operation, 0.1µA shutdown current, 795–819mV feedback reference voltage, and built-in OCP/SCP/OVP/OTP protection - all critical for compact, high-efficiency portable power designs.
Technical Context
The MP3422GG-Z implements fixed-frequency (500–700kHz) current-mode PWM control with internal slope compensation and soft-start, enabling stable regulation across wide input (1.9–5.5V) and output (2.5–5.5V) ranges. Its dual-MOSFET architecture includes a 13mΩ NMOS switch and 18mΩ PMOS synchronous rectifier with true output disconnect capability.
Startup begins in linear charge mode until VOUT reaches 1.7V, then transitions to boost mode with ≥6.5A current limit when VOUT ≥ VIN + 0.3V; it enters down-mode only during fault conditions. Bias sourcing shifts from IN to OUT once VOUT exceeds VIN, enabling input-independent operation after startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.9V to 5.5V - enables direct operation from single-cell Li-ion (2.8–4.2V) or alkaline/NiMH stacks without pre-regulation. |
| Output Voltage Range | 2.5V to 5.5V - programmable via external resistor divider on FB pin; supports USB 5V compliance and adjustable logic rail generation. |
| Switching Frequency | 600kHz (±100kHz) - allows use of small 1–2.2µH inductors and <22µF ceramic output capacitors for space-constrained layouts. |
| Peak Switch Current Limit | ≥6.5A - ensures robust transient response and sustained 2.5A output at 5V from 2.8V input under worst-case thermal conditions. |
| Quiescent Current | 43µA - minimizes standby drain in always-on battery backup circuits, extending shelf life in power banks and portable accessories. |
| Feedback Reference Voltage | 807mV (±12mV) - provides precise output regulation accuracy; enables ±1% output tolerance with 1% resistor dividers. |
| Shutdown Current | 0.1µA - isolates load completely during system sleep, eliminating parasitic discharge paths in IoT edge nodes. |
Pinout & Package
MP3422GG-Z is housed in a thermally enhanced 14-pin QFN package measuring 2mm × 2mm with 0.5mm pitch and exposed thermal pad (PGND-connected). The package supports high-density PCB layouts and efficient heat dissipation in thin-profile portable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 13 PGND | Power Ground | Primary return path for high-current switching loops; must be connected to large copper pour and multiple vias to thermal pad for EMI suppression and thermal management. |
| 3, 14 SW | Switch Node | Drain connection of internal NMOS and source of PMOS; carries high di/dt ripple current - requires shortest possible trace to inductor and low-inductance layout. |
| 4, 5, 6 OUT | Regulated Output | Drain of internal PMOS rectifier; fully disconnected from IN during shutdown; supplies load and powers internal bias when VOUT > VIN. |
| 7 NC | No Connect | Factory-reserved pin; must be left floating or tied to PGND - no functional role in application circuitry. |
| 8 EN | Enable Control | Active-high digital input (1.2V threshold); controls full device startup/shutdown and initiates soft-start sequence upon assertion. |
| 9 IN | Input Supply | Bias source during startup; powers internal circuitry until VOUT rises sufficiently to take over; requires local 22µF ceramic bypass. |
| 10 INA | Internal Bias Input | Must be externally shorted to IN pin; provides dedicated bias path for factory test - not optional in production design. |
| 11 AGND | Analog Ground | Reference for FB error amplifier and internal reference; must be separated from PGND and joined at single point near IC to avoid noise coupling. |
| 12 FB | Feedback Input | Connects to resistor divider midpoint; regulates output by comparing against 807mV internal reference; sensitive to noise - route away from SW node. |
Key Features
| Feature | Design Value |
|---|---|
| True Output Disconnect | PMOS-based isolation eliminates body diode conduction, enabling zero-VOUT shutdown and external bias retention - essential for USB OTG and dual-power-path systems. |
| Integrated Dual MOSFETs | 13mΩ NMOS switch + 18mΩ PMOS rectifier eliminate external Schottky diode and reduce BOM count while achieving up to 98% peak efficiency. |
| Programmable Soft-Start | Internally controlled 2ms reference ramp prevents inrush current during startup - avoids input voltage droop in weak battery or shared-rail applications. |
| Multi-Level Protection | Combines OCP (6.5A), SCP (linear charge mode fallback), OVP (7V cutoff), and OTP (150°C shutdown with 20°C hysteresis) for field-reliable operation. |
| Input UVLO with Hysteresis | 1.3V rising / 0.65V falling threshold prevents oscillation near battery depletion; supports graceful shutdown in energy-harvesting and coin-cell systems. |
Applications
| USB Power Delivery Adapter | Portable Power Bank |
|---|---|
|
Use Scenario: Step-up conversion from 3.3V or 3.7V Li-ion battery to stable 5V USB output for charging smartphones and peripherals. IC Role / Device Role / Timing Role: Primary synchronous boost regulator with output disconnect - manages power path, load switching, and battery-to-USB voltage translation. Use Value: Delivers 2.5A at 5V with <43µA quiescent current, enabling >100-hour standby in compact power banks using 2×2mm footprint. |
Use Scenario: Compact, high-efficiency boost stage in multi-cell or single-cell portable chargers supporting USB-A and USB-C PD profiles. IC Role / Device Role / Timing Role: Core voltage regulator with true output disconnect - isolates battery during idle, prevents reverse current, and enables fast wake-up. Use Value: 98% peak efficiency and 0.1µA shutdown current extend usable capacity by >8% versus discrete diode-based solutions in 10,000mAh power banks. |
| Wireless Headphone Charging Case | IoT Sensor Node Power Management |
|
Use Scenario: Boosting 3.7V battery voltage to 5V for fast-charging TWS earbuds inside compact charging cases with strict thermal limits. IC Role / Device Role / Timing Role: High-current boost converter with thermal foldback - regulates output while limiting die temperature in sealed plastic enclosures. Use Value: 6.5A switch current limit sustains 1.5A charging pulses without derating; 2×2mm QFN fits within 12mm × 12mm PCB area constraints. |
Use Scenario: Providing regulated 3.3V or 5V rail from primary 1.9–3.6V battery in ultra-low-power environmental sensors with intermittent transmit bursts. IC Role / Device Role / Timing Role: Always-on boost regulator with programmable output and deep-sleep disconnect - powers MCU, radio, and analog front-end on demand. Use Value: 43µA operating IQ and 0.1µA shutdown current enable >5-year battery life in LoRaWAN nodes using CR2032 or AA cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 12.5A switch limit, 2.7V min input, 500kHz switching, no true output disconnect (body diode leakage ~10µA) | Preferred for >3A continuous loads; unsuitable where zero-VOUT shutdown is required (e.g., USB OTG host mode) | Select if peak current >6.5A needed and output disconnect is non-critical; verify body diode leakage acceptable in system sleep state. |
| RT9086AGQW | 4.5A switch limit, 0.9V min input, 1.5MHz switching, integrated soft-start, no linear charge mode or output disconnect | Better for ultra-low-input (coin cell) apps; lacks inrush limiting and true disconnect - requires external MOSFET for isolation | Choose for sub-1V battery systems or where 1.5MHz enables smaller magnetics; add external PMOS if output isolation is mandatory. |
Compared with TPS61088RHLR and RT9086AGQW, MP3422GG-Z uniquely combines true output disconnect, 6.5A current capability, and 43µA quiescent current in a 2×2mm package - making it optimal for space- and efficiency-critical USB power banks and portable audio accessories requiring clean power sequencing.
Availability
MP3422GG-Z is available at Aetrix Electronics and suitable for battery-powered products, USB power supply modules, and consumer electronic accessories requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP3422GG-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 manufacturing partnerships.
The MP3422 belongs to MPS's high-efficiency DC-DC boost converter product line, engineered specifically for portable and battery-operated applications demanding minimal footprint, ultra-low quiescent current, and robust protection in harsh thermal environments.
FAQ
What is the minimum input voltage required for MP3422GG-Z to start switching?
The MP3422GG-Z starts up when the input voltage exceeds the rising UVLO threshold of 1.3V (typical), but stable closed-loop boost operation requires ≥1.9V input. Below 1.9V, the device remains in linear charge mode until VOUT reaches 1.7V, then transitions to switching only if VIN ≥1.9V.
Does MP3422GG-Z require an external Schottky diode?
No. The MP3422GG-Z integrates both NMOS and PMOS power switches, eliminating the need for an external Schottky diode. Adding one would compromise the true output disconnect feature and increase forward voltage drop, reducing efficiency and disabling inrush current limiting.
How is output voltage programmed on MP3422GG-Z?
Output voltage is set using a resistor divider from VOUT to AGND, with the midpoint connected to the FB pin. The formula is VOUT = 0.807V × (1 + R1/R2). For 5V output, typical values are R1 = 787kΩ and R2 = 150kΩ; R1 >600kΩ is recommended for stability and low IQ.
What thermal performance can be expected in a 2-layer PCB design?
In a standard 2-layer board with 1oz copper and no thermal vias, θJA is approximately 120°C/W. With the recommended 4-layer board (JESD51-7), θJA is 80°C/W. At 2.5A/5V output and 2.8V input, junction temperature rise is ~65°C above ambient - well within the 125°C max operating range.
Can MP3422GG-Z operate with input voltage higher than output voltage?
Yes - the MP3422GG-Z automatically enters down-mode (buck-like operation) when VOUT < VIN + 0.3V, limiting peak current to ~4A. However, this mode is intended only for startup and fault recovery; sustained operation in down-mode degrades efficiency and regulation and is not recommended for normal use.
Is the NC pin (Pin 7) required to be grounded?
No. Pin 7 is designated NC (No Connect) and is reserved for factory testing. It may be left floating or tied to PGND - neither choice affects functionality. Do not connect it to any active signal or power net, as it has no internal connection.
What is the purpose of the INA pin (Pin 10)?
INA is an internal bias supply pin used during factory testing. In all application circuits, it must be shorted directly to the IN pin using a low-impedance trace. Leaving INA unconnected or routing it separately will cause improper biasing and potential malfunction.
MP3422GG-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):
- 1.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6.5A (Switch)
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (2x2)
MP3422GG-Z FAQ
1.How can I place an order for MP3422GG-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3422GG-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 MP3422GG-Z reliable?
The price and inventory of MP3422GG-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3422GG-Z is usually 5 days.
3.What payment methods are accepted for MP3422GG-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3422GG-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3422GG-Z?
MP3422GG-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3422GG-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 MP3422GG-Z?
For technical support, including MP3422GG-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3422GG-Z requirements.
6.How does Aetrix verify that MP3422GG-Z is sourced from the original manufacturer or authorized distributors?
All MP3422GG-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 MP3422GG-Z meets industry standards.
7.What is the process for return or replacement of MP3422GG-Z?
All MP3422GG-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3422GG-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 MP3422GG-Z part is unused and in its original packaging.
Return procedure for MP3422GG-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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