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Monolithic Power Systems Inc. MP2131GG-Z
- Part No.:
- MP2131GG-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-PowerVFQFN
- Datasheet:
-
MP2131GG-Z.pdf
- Description:
- IC REG BUCK ADJ 4A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,102
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Product details
Overview
MP2131GG-Z from Monolithic Power Systems is a synchronous step-down DC-DC converter IC with integrated 35 mΩ high-side and 18 mΩ low-side MOSFETs, delivering up to 4 A continuous output current from a 2.7 V–5.5 V input. It regulates output down to 0.6 V using constant-on-time (COT) control, achieves >96% peak efficiency, and supports power sequencing via EN and open-drain PG pins - ideal for single-cell Li+-powered portable instruments and handheld devices.
For engineers reviewing the MP2131GG-Z datasheet, MP2131GG-Z pinout, MP2131GG-Z application, or MP2131GG-Z equivalent, key selection criteria include its 1.2 MHz fixed-frequency operation, 0.5 ms internal soft-start, 100% duty-cycle capability in dropout, thermal shutdown at 155°C, and QFN-12 (2 mm × 2 mm) package with dual PVIN/SW/PGND pins for enhanced thermal and current handling.
Technical Context
The MP2131GG-Z implements constant-on-time (COT) control with input voltage feed-forward to maintain stable 1.2 MHz switching across input (2.7–5.5 V) and output (0.6–VIN) ranges. Its dual-power-FET architecture enables high-efficiency synchronous rectification without external diodes.
It integrates cycle-by-cycle overcurrent protection (7.5 A HS / 3.5 A LS limits), hiccup-mode short-circuit recovery, and advanced asynchronous modulation (AAM) with zero-crossing detection to sustain DCM at light load - delivering >80% efficiency at 1 mA while maintaining <19 μA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports direct regulation from single-cell Li+ batteries (3.0–4.2 V nominal) without pre-regulation. |
| Output Current | 4 A continuous - sufficient for core logic rails in portable SoCs, FPGAs, and wireless baseband processors. |
| Switching Frequency | 1.2 MHz - enables compact 1 µH inductors and ceramic input/output capacitors, reducing board area vs. lower-frequency buck converters. |
| Feedback Voltage | 600 mV ±6 mV - sets precise output regulation; allows resistor-divider programming of any VOUT ≥ 0.6 V with <±1% error. |
| Quiescent Current | 19 µA - minimizes battery drain during standby in always-on subsystems like real-time clocks or sensor hubs. |
| Thermal Shutdown | 155°C with 25°C hysteresis - protects die under sustained overload or poor PCB thermal design without latch-up. |
| Power Good Accuracy | ±10% window around VFB - provides reliable system-level power sequencing and fault detection for downstream logic. |
Pinout & Package
MP2131GG-Z is housed in an ultra-compact, thermally enhanced QFN-12 package (2 mm × 2 mm, 0.5 mm pitch) with exposed thermal pad. Dual-source PVIN (pins 1 & 10), SW (pins 2 & 11), and PGND (pins 3 & 12) reduce conduction losses and improve thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (1,10) | High-current input supply rail | Connects to input capacitor and powers internal high-side MOSFET; dual pins reduce IR drop and thermal stress. |
| SW (2,11) | Switch node | Drives external inductor; dual pins minimize trace inductance and ringing in high-dI/dt switching paths. |
| PGND (3,12) | Power ground return | Low-impedance return path for switch current; dual pins reduce ground bounce and improve EMI performance. |
| AGND (4) | Analog reference ground | Quiet ground for feedback and control circuitry; must be isolated from noisy PGND to prevent regulation error. |
| NC (5) | No connection | Internally unconnected; must remain floating - no routing or soldering allowed. |
| OUT (6) | Output voltage sense | Direct connection to output capacitor; used for remote sensing in high-current layouts to compensate for trace IR drop. |
| FB (7) | Feedback input | Monitors resistor divider output; 600 mV reference enables accurate VOUT programming with minimal divider current (≤50 nA). |
| EN (8) | Enable control | Active-high logic input (1.2 V threshold); internal 1 MΩ pull-down enables default-disable behavior when left floating. |
| PG (9) | Power good indicator | Open-drain output with 400 kΩ internal pull-up to VIN; asserts high only when FB is within ±10% of 600 mV. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-On-Time (COT) Control | Delivers <10 µs load transient response without external compensation components - simplifies layout and reduces BOM count. |
| Integrated Dual MOSFETs | 35 mΩ HS + 18 mΩ LS RDS(on) enables >96% peak efficiency at 4 A, eliminating discrete FET selection and gate-drive design. |
| Auto-Discharge on Disable | Linearly discharges output during EN deactivation (0.8 ms soft-stop), preventing uncontrolled voltage decay that could reset downstream logic. |
| Hiccup-Mode Short-Circuit Protection | Enters safe, low-power restart loop upon persistent overload - avoids thermal runaway while enabling automatic recovery when fault clears. |
| 100% Duty Cycle Operation | Maintains regulation even as input drops to VOUT level (e.g., 1.2 V out from 1.3 V input), extending battery runtime in deep discharge conditions. |
Applications
| Portable Instrument Power | Wireless Network Card Rail |
|---|---|
|
Use Scenario: Powering a handheld multimeter's microcontroller, ADC, and display backlight from a single 3.7 V Li+ cell. IC Role / Device Role / Timing Role: Primary step-down regulator generating 1.2 V core and 3.3 V I/O rails with tight load regulation and low-noise output. Use Value: 19 µA IQ extends battery life beyond 100 hours in sleep mode; COT control prevents display flicker during rapid measurement bursts. |
Use Scenario: Supplying 1.2 V to a Wi-Fi 6 baseband processor on a mini-PCIe card operating from 5 V bus. IC Role / Device Role / Timing Role: High-current point-of-load converter with fast transient response to handle bursty RF transmit current demands. Use Value: 4 A capability and 1.2 MHz switching allow use of 1 µH inductor and 22 µF ceramic caps - meeting space-constrained PCIe slot height limits. |
| Low-Voltage I/O System Power | DVD Drive Motor & Logic Supply |
|
Use Scenario: Generating 0.9 V and 1.8 V rails for FPGA I/O banks in a battery-powered industrial data logger. IC Role / Device Role / Timing Role: Programmable-output buck converter supporting multiple voltage domains via external resistor dividers. Use Value: 0.6 V feedback reference enables precise low-voltage generation; ±10% PG accuracy ensures safe FPGA configuration sequencing. |
Use Scenario: Providing regulated 3.3 V for DVD drive controller logic and 5 V for spindle motor driver from a 5 V USB input. IC Role / Device Role / Timing Role: Main DC-DC stage converting USB 5 V to stable 3.3 V logic rail, with hiccup protection against motor stall faults. Use Value: Dual PGND/PVIN/SW pins handle high pulsed motor currents without ground shift; thermal shutdown prevents damage during mechanical jams. |
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 |
|---|---|---|---|
| RT6220BGQW | Fixed 3.3 V output (non-adjustable), 3 A rating, 2.5 V–5.5 V input, 2 MHz switching | Limited to fixed-output designs; lacks FB pin and PG signal - unsuitable for multi-rail sequencing or custom VOUT. | Select only if 3.3 V output suffices and 3 A current is adequate; no soft-start or AAM mode support. |
| TPS62864DLCR | 3 A rating, 2.7 V–6 V input, 1.8 MHz, 12-bit VID interface, 1.2 µA IQ in shutdown | Requires digital interface for VOUT setting; no EN/PG pins - incompatible with analog power sequencing architectures. | Prefer for digitally controlled systems with PMBus or GPIO-based voltage scaling; not drop-in for MP2131GG-Z analog designs. |
Compared with RT6220BGQW and TPS62864DLCR, MP2131GG-Z uniquely balances 4 A output, analog programmability (0.6 V–VIN), full power sequencing (EN/PG), and ultra-low 19 µA quiescent current - making it optimal for cost-sensitive, battery-powered analog-control systems requiring flexibility and reliability.
Availability
MP2131GG-Z is available at Aetrix Electronics and suitable for portable instrumentation, wireless network cards, low-voltage I/O systems, and optical storage drives requiring stable component supply across production lifecycles.
Supply support for MP2131GG-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 over two decades of expertise in DC-DC conversion, motor drivers, and LED lighting controllers.
The MP2131 belongs to MPS's high-efficiency, small-footprint buck converter product line, designed specifically for space- and battery-constrained portable electronics where thermal performance, light-load efficiency, and ease of integration are critical.
FAQ
What is the minimum recommended output capacitance for stable operation?
The MP2131GG-Z requires ≥22 µF ceramic output capacitance for stable regulation at full 4 A load. Lower values may cause excessive output ripple or instability, especially with high-ESR capacitors. For 3.3 V or higher outputs, 47 µF is recommended to maintain margin under transient load steps.
Does MP2131GG-Z support forced PWM mode, or does it automatically enter discontinuous conduction mode (DCM) at light load?
The MP2131GG-Z uses Advanced Asynchronous Modulation (AAM) to automatically enter DCM at light load - no external pin or register control is needed. This improves light-load efficiency (>80% at 1 mA) while maintaining COT benefits; forced PWM mode is not supported.
Can the NC pin (Pin 5) be grounded or connected to any other signal?
No. Pin 5 is internally unconnected and must remain electrically floating - grounding, tying to VOUT, or routing to any net violates the absolute maximum ratings and risks unpredictable behavior or device failure. Leave it unconnected and un-soldered.
How is thermal performance affected by using only one set of PVIN/SW/PGND pins instead of both?
Using only one PVIN (pin 1), one SW (pin 2), and one PGND (pin 3) increases conduction resistance and thermal impedance by ~2×, raising junction temperature by up to 25°C at 4 A. Both sets must be routed in parallel to meet the 1.6 W power dissipation limit and avoid thermal shutdown.
What is the purpose of the OUT pin (Pin 6), and is it required for basic operation?
Pin 6 (OUT) provides remote output voltage sensing to compensate for PCB trace IR drop between the IC and load. It is optional for short-trace, low-current layouts but mandatory for 4 A applications or long power traces to maintain ±1% output accuracy at the load.
Is the internal soft-start time adjustable, or is it fixed at 0.5 ms?
The soft-start time is fixed at 0.5 ms (10% to 90% VOUT ramp) and not user-adjustable. It is implemented with an internal capacitor and current source; no external components modify this timing. Soft-stop time is similarly fixed at 0.8 ms.
Does the PG pin require an external pull-up resistor, or is the 400 kΩ internal pull-up sufficient?
The internal 400 kΩ pull-up to VIN is fully sufficient - no external resistor is needed. The PG pin is open-drain and sinks ≤1 mA when asserted low; connecting an external pull-up would create conflicting current paths and degrade noise immunity.
MP2131GG-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 12-PowerVFQFN
- 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):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 4A
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-QFN (2x2)
MP2131GG-Z FAQ
1.How can I place an order for MP2131GG-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2131GG-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 MP2131GG-Z reliable?
The price and inventory of MP2131GG-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2131GG-Z is usually 5 days.
3.What payment methods are accepted for MP2131GG-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2131GG-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2131GG-Z?
MP2131GG-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2131GG-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 MP2131GG-Z?
For technical support, including MP2131GG-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2131GG-Z requirements.
6.How does Aetrix verify that MP2131GG-Z is sourced from the original manufacturer or authorized distributors?
All MP2131GG-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 MP2131GG-Z meets industry standards.
7.What is the process for return or replacement of MP2131GG-Z?
All MP2131GG-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2131GG-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 MP2131GG-Z part is unused and in its original packaging.
Return procedure for MP2131GG-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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