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Monolithic Power Systems Inc. MP2326GD-P
- Part No.:
- MP2326GD-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-VFQFN
- Datasheet:
-
MP2326GD-P.pdf
- Description:
- IC REG BUCK ADJ 4A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,590
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Product details
Overview
MP2326GD-P from Monolithic Power Systems is a fully integrated, synchronous, constant-on-time (COT) step-down DC/DC converter delivering 4A continuous output current with 40µA quiescent current, 3.9V–19V input range, and adjustable 0.6V output voltage. It integrates 90mΩ/30mΩ high-side/low-side MOSFETs, features power-good indication, programmable soft-start, and operates in forced PWM or auto PFM/PWM mode - optimized for battery-powered SSDs and portable computing.
For engineers reviewing the MP2326GD-P datasheet, MP2326GD-P pinout, MP2326GD-P application, or MP2326GD-P equivalent, key selection criteria include light-load efficiency at 40µA IQ, COT-based transient response, thermal shutdown at 150°C, and QFN-14 (2mm×3mm) layout constraints for compact power delivery.
Technical Context
The MP2326GD-P uses constant-on-time (COT) control with feed-forward input voltage sensing to achieve fast load transient response and simplified loop stability-no external compensation required. Its internal ramp generator supports stable operation with low-ESR ceramic output capacitors when paired with an external CR capacitor.
It implements non-latching over-current protection with hiccup-mode recovery, under-voltage lockout (3.7V rising threshold, 200mV hysteresis), and thermal shutdown at 150°C with 20°C hysteresis. The device supports pre-biased start-up and monotonic output ramping via 8µA soft-start current source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.9V to 19V - supports wide-input battery and adapter-fed systems without external LDO pre-regulation. |
| Output Current | 4A continuous - enables single-chip power for SoC cores or DDR memory rails in space-constrained designs. |
| Quiescent Current | 40µA - sustains >100-hour standby in always-on IoT or tablet applications with minimal battery drain. |
| Feedback Reference | 600mV ±6mV - enables precise 0.6V–19V output adjustment using standard resistor dividers with <1% regulation error. |
| RDS(ON) | 90mΩ HS / 30mΩ LS - reduces conduction loss to <120mW at 4A, enabling >92% peak efficiency at 12V→1.2V conversion. |
| Switching Frequency | Programmable up to ~1.1MHz - allows use of 2.2µH inductors and 22µF ceramic output caps for ultra-compact PCB footprint. |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects against sustained overload while permitting safe re-start at 130°C junction temperature. |
Pinout & Package
MP2326GD-P is housed in a thermally enhanced, lead-free, halogen-free QFN-14 package measuring 2mm × 3mm with exposed thermal pad (EP). The package supports high-density layout and efficient heat dissipation via PCB copper pour connected to Pin 1/12 (GND) and EP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 12 | GND | System ground reference for output regulation and thermal path - requires low-impedance connection to PCB ground plane and thermal pad. |
| 2, 13 | SW | Switch node connecting internal HS/LS FETs - must use wide copper traces and multiple vias to minimize ringing and EMI. |
| 3, 14 | VIN | Main input supply (3.9–19V) - decoupled by ≥10µF ceramic capacitor placed adjacent to pins for high-frequency noise suppression. |
| 4 | FREQ/MODE | Configures switching frequency and operating mode: resistor-to-VIN = forced PWM; resistor-to-GND = auto PFM/PWM. |
| 5 | PG | Open-drain power-good signal - asserts high after 140µs when VFB ≥ 90% of 600mV; requires external pull-up to VCC. |
| 6 | SS | Soft-start timing node - charges with 8µA current; 4.7nF capacitor yields ~3.5ms ramp time to prevent inrush current. |
| 7 | FB | Feedback input monitoring output voltage divider - high-impedance (10–50nA bias) for minimal loading on resistor network. |
| 8 | CR | External ramp compensation - connects capacitor from VOUT to adjust internal ramp amplitude for stability with low-ESR ceramics. |
| 9 | EN | Enable control with 1MΩ internal pulldown - logic-high (>1.6V) enables operation; clamped at 6.5V for robustness. |
| 10 | BST | Bootstrap supply for HS gate driver - requires 0.1µF ceramic capacitor between BST and SW to sustain gate drive above VIN. |
| 11 | VCC | Internal 5V LDO output - powers internal circuitry; requires 1µF ceramic decoupling capacitor placed within 2mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-On-Time (COT) Control | Eliminates need for external compensation components and delivers sub-10µs load transient response without phase-margin tuning. |
| 40µA Quiescent Current | Enables >100-hour battery life in always-on modes for SSDs and portable devices without sacrificing dynamic performance. |
| Integrated 90mΩ/30mΩ MOSFETs | Reduces BOM count and PCB area versus discrete FET solutions while maintaining >92% efficiency at full 4A load. |
| Programmable Soft-Start | Prevents output overshoot and inductor saturation during startup using externally adjustable capacitor (4.7–100nF). |
| Hiccup-Mode Short-Circuit Protection | Automatically recovers from sustained overloads by cycling enable/disable with soft-start reset - no manual intervention needed. |
Applications
| SSD Power Rail | Tablet Core Voltage |
|---|---|
|
Use Scenario: Powers NAND flash controller and DRAM interface in M.2 and BGA SSD modules requiring tight voltage tolerance and low-noise operation. IC Role / Device Role / Timing Role: Primary buck regulator supplying 1.2V/1.8V/3.3V rails with <±1% line/load regulation and <10mV ripple under 4A dynamic load. Use Value: 40µA IQ extends SSD sleep-mode battery life; COT control maintains regulation during burst read/write current transients. |
Use Scenario: Supplies CPU/GPU core voltage in 7–10 inch tablets where board space and thermal envelope are tightly constrained. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter stepping down 12V adapter or battery to 0.8–1.3V core rail with programmable soft-start. Use Value: 2mm×3mm QFN-14 package saves >30% area vs. comparable 3mm×3mm converters; forced PWM mode ensures consistent EMI profile. |
| Gaming Peripheral PSU | Industrial Handheld Terminal |
|
Use Scenario: Powers RGB lighting controllers, USB-C PD negotiation ICs, and microcontrollers in compact gaming mice/keyboards. IC Role / Device Role / Timing Role: Secondary buck stage converting 5V USB power to 3.3V logic rail with power-good sequencing and hiccup-mode fault recovery. Use Value: PG signal enables firmware-controlled power sequencing; auto PFM/PWM mode minimizes idle power draw during peripheral standby. |
Use Scenario: Delivers regulated 5V or 3.3V from 7.4V Li-ion battery packs in rugged handheld scanners and data collectors. IC Role / Device Role / Timing Role: Main system power IC supporting wide input range (3.9–19V), thermal shutdown, and pre-biased start-up for hot-swap battery replacement. Use Value: UVLO hysteresis prevents brown-out oscillation during battery sag; 150°C thermal shutdown ensures reliability in sealed enclosures. |
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 |
|---|---|---|---|
| RT6220AGQW | Higher IQ (65µA), fixed 500kHz frequency, no FREQ/MODE pin - lacks programmable mode selection and soft-start adjustability. | Suitable for cost-sensitive, fixed-frequency designs where light-load efficiency is secondary to BOM simplicity. | Select RT6220AGQW only if design does not require auto PFM/PWM mode or adjustable soft-start timing. |
| TPS543320RNVR | Higher VIN max (20V), integrated PMBus interface, 12-bit VID control - adds digital configurability but increases complexity and cost. | Targeted at server/industrial applications needing telemetry, margining, and remote configuration - not optimized for battery IQ. | Choose TPS543320RNVR only when digital control, fault logging, or multi-rail coordination are required. |
Compared with RT6220AGQW and TPS543320RNVR, MP2326GD-P uniquely balances ultra-low 40µA quiescent current, dual-mode (PWM/PFM) operation, and compact 2mm×3mm footprint - making it optimal for battery-constrained portable electronics where analog simplicity and standby efficiency are primary.
Availability
MP2326GD-P is available at Aetrix Electronics and suitable for solid-state drives, tablet PCs, gaming peripherals, and industrial handheld terminals requiring stable component supply across long production lifecycles.
Supply support for MP2326GD-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 analog and mixed-signal ICs for power management, motion control, and automotive applications.
The MP2326GD-P belongs to MPS's high-efficiency, low-IQ DC/DC converter product line, designed specifically for battery-operated and space-constrained portable electronics demanding extended runtime and minimal PCB area.
FAQ
What is the minimum output voltage achievable with MP2326GD-P?
The MP2326GD-P has a fixed 600mV feedback reference voltage with ±6mV tolerance. Using an external resistor divider, the output can be set as low as 0.6V - confirmed by electrical characteristics table and typical application circuits in Rev. 1.2 datasheet. No internal clamp prevents operation at this minimum.
Does MP2326GD-P support pre-biased output startup?
Yes. The MP2326GD-P implements monotonic pre-bias start-up: when the output is already biased, the internal soft-start capacitor charges only after BST voltage exceeds its 2.2V UVLO threshold and FB voltage remains below the reference, preventing reverse current flow and ensuring controlled ramp-up.
How is thermal performance affected by the QFN-14 (2mm×3mm) package?
The QFN-14 package has θJA = 70°C/W and θJC = 15°C/W on a 4-layer JEDEC PCB. With 1.8W max power dissipation, junction temperature rise is limited to ~126°C at 25°C ambient - well within the 150°C shutdown threshold, provided the thermal pad is soldered to ≥1cm² copper pour.
Can MP2326GD-P operate with ceramic output capacitors only?
Yes, but external ramp compensation is required. The CR pin accepts a capacitor from VOUT to stabilize COT control with low-ESR ceramics. Table 1 in the datasheet specifies Cr values (e.g., 100pF for 1.2V output) - omitting CR causes instability in PWM mode.
What happens to PG during EN de-assertion or input undervoltage?
When EN is pulled low or VIN drops below 0.8V, PG de-asserts (goes low) only if pulled up to VCC - per datasheet recommendation on page 15. If pulled to an external rail, PG remains high and cannot indicate fault conditions reliably.
Is the FREQ/MODE pin mandatory to connect?
Yes. The datasheet explicitly states "Do NOT float FREQ/MODE." Leaving it unconnected risks undefined switching behavior and potential instability. A resistor to VIN (for forced PWM) or GND (for auto PFM/PWM) is required for guaranteed operation.
What is the maximum supported switching frequency at 12V input and 1.2V output?
Based on minimum on-time (90ns) and minimum off-time (150ns) limits, the theoretical maximum frequency is ~1.1MHz - calculated using equations (4) and (5) on page 13 of Rev. 1.2. This is achievable in forced PWM mode with appropriate R6 selection.
MP2326GD-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-VFQFN
- 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):
- 3.9V
- Voltage - Input (Max):
- 19V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- -
- Current - Output:
- 4A
- Frequency - Switching:
- 1.1MHz
- Synchronous Rectifier:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (2x3)
MP2326GD-P FAQ
1.How can I place an order for MP2326GD-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2326GD-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 MP2326GD-P reliable?
The price and inventory of MP2326GD-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2326GD-P is usually 5 days.
3.What payment methods are accepted for MP2326GD-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2326GD-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2326GD-P?
MP2326GD-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2326GD-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 MP2326GD-P?
For technical support, including MP2326GD-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2326GD-P requirements.
6.How does Aetrix verify that MP2326GD-P is sourced from the original manufacturer or authorized distributors?
All MP2326GD-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 MP2326GD-P meets industry standards.
7.What is the process for return or replacement of MP2326GD-P?
All MP2326GD-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2326GD-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 MP2326GD-P part is unused and in its original packaging.
Return procedure for MP2326GD-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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