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Monolithic Power Systems Inc. MP2322GQH-Z
- Part No.:
- MP2322GQH-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-VFDFN
- Datasheet:
-
MP2322GQH-Z.pdf
- Description:
- IC REG BUCK ADJ 1A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,610
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Product details
Overview
MP2322GQH-Z from Monolithic Power Systems is a synchronous step-down DC-DC converter with integrated 260mΩ/120mΩ MOSFETs, delivering 1A continuous output current across a 3V–22V input range. It features 5μA quiescent current, constant-on-time (COT) control for fast transient response, and power-good (PG) indication - deployed in battery-powered IoT sensors and home security hubs requiring ultra-low standby power and compact footprint.
For engineers reviewing the MP2322GQH-Z datasheet, MP2322GQH-Z pinout, MP2322GQH-Z application, or MP2322GQH-Z equivalent, key selection criteria include light-load efficiency down to 100μA, 1.25MHz fixed-frequency operation in CCM, EN-controlled output discharge, and QFN-8 (1.5×2mm) thermal performance under 125°C junction temperature.
Technical Context
The MP2322GQH-Z implements a constant-on-time (COT) control architecture with valley-current limiting and automatic mode transition between PWM and power-save mode (PSM). Its internal 3.3V LDO powers control logic and gate drivers, while bootstrap charging enables high-side N-channel MOSFET operation without external charge pumps.
Protection circuitry includes hiccup-mode over-current protection (OCP), over-voltage protection (OVP) with 8μs deglitch, thermal shutdown at 150°C with 20°C hysteresis, and input UVLO with 2.8V rising threshold and 170mV hysteresis - all implemented in silicon without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 22V - supports single/multi-cell Li-ion, 12V rails, and dry-cell battery systems without pre-regulation. |
| Output Current | 1A continuous - sustains full load across ambient temperatures up to +125°C with proper PCB copper area. |
| Quiescent Current | 5μA - enables >1-year battery life in always-on IoT endpoints powered by coin cells or 2xAA alkalines. |
| Switching Frequency | 1.25MHz ±10% in CCM - allows use of small 2.2–4.7μH inductors and reduces EMI filtering complexity. |
| Feedback Reference | 600mV ±1.5% - sets output voltage via resistor divider; enables adjustable outputs from 0.6V to ≤12V. |
| Power Good Threshold | 92% rising / 87% falling of VREF - provides precise enable/disable signaling for downstream processors and PMIC sequencing. |
| RDS(ON) HS/LS | 260mΩ / 120mΩ - minimizes conduction loss at 1A, enabling >90% efficiency at 12VIN/3.3VOUT. |
Pinout & Package
MP2322GQH-Z is housed in a thermally enhanced QFN-8 package (1.5mm × 2mm, 0.5mm pitch, exposed thermal pad). The package supports high-density layout with minimal board area and efficient heat dissipation through the bottom pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | System ground reference | Primary return path for output current and feedback; requires low-impedance connection to thermal pad and input/output capacitors. |
| 2 IN | Main input supply | Accepts 3–22V; must be decoupled with ≥22μF ceramic capacitor placed adjacent to pin with short wide traces. |
| 3 EN | Enable control input | Logic-high (>1.2V) enables regulation; logic-low disables IC and activates output discharge via LS-FET. |
| 4 VCC | Internal 3.3V LDO output | Powers internal circuitry; requires ≥1μF X7R/X5R ceramic capacitor placed within 2mm of pin. |
| 5 FB | Feedback voltage sense | Monitors resistive divider output; 600mV reference enables precise output voltage setting and stability. |
| 6 PG | Open-drain power-good flag | Asserts high after soft-start and valid VOUT; pulls low on UV/OV/fault - requires external pull-up (e.g., 100kΩ to VCC). |
| 7 BST | Bootstrap supply node | Connects to SW via 0.1μF ceramic capacitor; supplies floating gate drive for high-side MOSFET. |
| 8 SW | Switch node | Drives external inductor; requires short, wide copper trace and direct connection to BST capacitor and inductor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 5μA shutdown current and light-load PSM extend battery runtime in always-on sensing nodes. |
| Integrated dual MOSFETs | 260mΩ HS + 120mΩ LS switches eliminate external FETs and gate drivers, reducing BOM count and layout area. |
| EMI-optimized switching edge | Controlled slew rate minimizes high-frequency harmonics, easing compliance with CISPR 22/32 Class B limits. |
| Pre-biased start-up support | Enables monotonic ramp-up into pre-charged output rails - critical for hot-swap and multi-rail power sequencing. |
| Output discharge on disable | Active LS-FET discharge during EN=low clears residual VOUT, preventing back-powering of upstream circuits. |
Applications
| Smart Sensor Node | Home Security Hub |
|---|---|
Use Scenario: Battery-powered environmental sensor (temp/humidity/CO₂) transmitting data every 5 minutes via BLE or LoRaWAN. IC Role / Device Role / Timing Role: Primary 3.3V system rail regulator; supplies MCU, radio, and analog front-end from 2xAA or CR123A cells. Use Value: 5μA IQ enables >2 years of operation on 2500mAh alkaline cells; QFN-8 footprint fits sub-10cm² PCBs. | Use Scenario: Central alarm panel with motion detectors, door/window contacts, and cellular backup. IC Role / Device Role / Timing Role: Secondary 3.3V rail generator from 12V wall adapter or sealed lead-acid backup battery. Use Value: 3–22V input range accommodates brownout conditions and battery sag; PG signal synchronizes MCU wake-up with stable VOUT. |
| White Goods Control Board | Industrial IoT Gateway |
Use Scenario: Washing machine main control board powering microcontroller, display, and motor driver logic. IC Role / Device Role / Timing Role: Point-of-load regulator converting 12V system rail to 3.3V for digital subsystems. Use Value: High efficiency across 0.1–1A load range reduces thermal stress in enclosed cabinets; OVP protects against 24V surge events. | Use Scenario: DIN-rail mounted gateway aggregating Modbus RTU sensors and forwarding via Ethernet/Wi-Fi. IC Role / Device Role / Timing Role: Input-flexible 5V or 3.3V rail generator from 12–24V industrial supply. Use Value: Wide VIN range eliminates need for input pre-regulators; thermal shutdown ensures reliability in unventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DRLR | Lower IQ (300nA), but max 0.6A output and 5.5V max input - lacks 22V capability and 1A rating. | Suitable only for ultra-low-power sub-500mA loads; not viable for 12V input or 1A motor driver rails. | Select when battery life dominates over current capability and input voltage stays below 5.5V. |
| RT7297CGQW | 1.2A rating and 24V input, but 15μA IQ and no PG pin - higher static loss and no power sequencing support. | Acceptable for cost-sensitive industrial controls where PG signaling and microamp IQ are non-critical. | Choose if thermal margin >125°C is required and PG functionality is omitted from system design. |
Compared with TPS62840DRLR and RT7297CGQW, MP2322GQH-Z uniquely balances 1A delivery, 22V input tolerance, 5μA IQ, and PG signaling in a 1.5×2mm footprint - making it optimal for space-constrained, battery-backed, and multi-rail embedded systems requiring robust fault reporting.
Availability
MP2322GQH-Z is available at Aetrix Electronics and suitable for IoT sensor nodes, home security hubs, white goods control boards, and industrial gateways requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MP2322GQH-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 MP2322 belongs to MPS's low-IQ synchronous buck converter product line, engineered specifically for battery-powered and energy-conscious applications where extended runtime, small solution size, and reliable fault protection are mandatory.
FAQ
What is the minimum output voltage achievable with MP2322GQH-Z?
The MP2322GQH-Z has a 600mV feedback reference voltage with ±1.5% tolerance. Using an external resistor divider, the lowest regulated output is 0.6V - confirmed in the datasheet's "Recommended Operating Conditions" table and validated across temperature. Output voltages below 0.6V are unsupported and will not regulate.
Does MP2322GQH-Z support forced PWM mode?
No. MP2322GQH-Z operates exclusively in automatic mode transition between CCM and power-save mode (PSM) based on load current. There is no pin or register to force continuous PWM operation - light-load efficiency is achieved solely through frequency reduction and valley-current zero-crossing detection.
Can MP2322GQH-Z be used with ceramic output capacitors only?
Yes. The MP2322GQH-Z is optimized for ceramic output capacitors (e.g., 22μF X5R/X7R). Its COT control loop is stable with ESR <10mΩ, eliminating the need for electrolytic or tantalum capacitors. Layout guidelines specify placing the output capacitor within 5mm of SW and GND pins.
What is the maximum recommended PCB copper area for thermal relief?
For continuous 1A operation at +85°C ambient, MPS recommends ≥200mm² of 2oz copper connected to the exposed thermal pad on layer 1, with ≥4 thermal vias (0.3mm diameter) to inner ground planes. This achieves θJA ≈ 65°C/W - verified in the "Thermal Resistance" section of the datasheet.
Is the BST capacitor value critical, and what type is specified?
Yes. A 0.1μF X7R ceramic capacitor rated for ≥16V must be placed directly between BST and SW pins, with trace length <1mm. This value ensures sufficient charge transfer for high-side gate drive across duty cycles up to 98%; deviation causes premature HS-FET turn-off or bootstrap undervoltage faults.
How does the MP2322GQH-Z respond to input voltage dropout below UVLO?
When VIN drops below 2.63V (UVLO falling threshold), the MP2322GQH-Z immediately disables switching, turns off both MOSFETs, pulls PG low, and enters shutdown with 2μA current draw. Recovery occurs only after VIN rises above 2.97V (rising threshold) and soft-start reinitializes - no latch-up or manual reset required.
Does MP2322GQH-Z support output voltages above 5V?
Yes. The device supports output voltages up to 12V, limited by the maximum duty cycle (96–98%) and minimum off-time (140ns). At VIN = 22V, VOUT = 12V is achievable with appropriate inductor and compensation; Table 1 in the datasheet lists R1/R2 values for 5V and confirms 12V as the absolute maximum per "Recommended Operating Conditions".
MP2322GQH-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 8-VFDFN
- 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):
- 3V
- Voltage - Input (Max):
- 22V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 12V
- Current - Output:
- 1A
- Frequency - Switching:
- 1.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-QFN (1.5x2)
MP2322GQH-Z FAQ
1.How can I place an order for MP2322GQH-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2322GQH-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 MP2322GQH-Z reliable?
The price and inventory of MP2322GQH-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2322GQH-Z is usually 5 days.
3.What payment methods are accepted for MP2322GQH-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2322GQH-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2322GQH-Z?
MP2322GQH-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2322GQH-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 MP2322GQH-Z?
For technical support, including MP2322GQH-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2322GQH-Z requirements.
6.How does Aetrix verify that MP2322GQH-Z is sourced from the original manufacturer or authorized distributors?
All MP2322GQH-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 MP2322GQH-Z meets industry standards.
7.What is the process for return or replacement of MP2322GQH-Z?
All MP2322GQH-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2322GQH-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 MP2322GQH-Z part is unused and in its original packaging.
Return procedure for MP2322GQH-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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