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Monolithic Power Systems Inc. MP2148GQD-18-Z
- Part No.:
- MP2148GQD-18-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 6-VFDFN
- Datasheet:
-
MP2148GQD-18-Z.pdf
- Description:
- IC REG BUCK 1.8V 1A 6QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,477
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Product details
Overview
MP2148GQD-18-Z from Monolithic Power Systems is a fixed-output 1.8V, 1A synchronous step-down DC/DC converter in a QFN-6 (1.0mm × 1.5mm) package. It operates from 2.3V–5.5V input, delivers 11μA quiescent current, features 2.2MHz switching frequency, power-good indication, and integrated 120mΩ/80mΩ MOSFETs-designed for low-power I/O rail generation in portable and wearable devices.
For engineers reviewing the MP2148GQD-18-Z datasheet, MP2148GQD-18-Z pinout, MP2148GQD-18-Z application, or MP2148GQD-18-Z equivalent, key selection criteria include fixed 1.8V output accuracy (±1.2% over temperature), hiccup-mode short-circuit protection, 70μs power-good delay, and compatibility with low-ESR ceramic output capacitors in space-constrained designs.
Technical Context
The MP2148GQD-18-Z uses constant-on-time (COT) control with input-voltage feedforward to maintain stable 2.2MHz switching across its 2.3V–5.5V input range. Its internal architecture integrates high-side P-channel (120mΩ) and low-side N-channel (80mΩ) MOSFETs, eliminating external switch requirements.
It implements sleep-mode operation for ultra-low quiescent current (11μA), AAM (Advanced Asynchronous Modulation) with ZCD for light-load efficiency, and a dedicated open-drain PG pin with ±5% trip thresholds (85%–90% of nominal VOUT) and 400mV sink capability-enabling precise power-rail monitoring in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1.2% over -40°C to +125°C - ensures stable core/I/O rail for low-voltage processors and sensors. |
| Max Output Current | 1A continuous - supports single-rail powering of SoCs, RF transceivers, or sensor hubs without external current boosting. |
| Quiescent Current | 11μA - enables multi-week battery life in always-on wearable or IoT edge nodes. |
| Switching Frequency | 2.2MHz typical - allows use of sub-2mm footprint 1μH shielded inductors and minimizes EMI in dense PCB layouts. |
| Input Voltage Range | 2.3V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), LiFePO₄ (2.5–3.65V), and USB-powered systems. |
| Power Good Delay | 70μs - provides deterministic system reset timing after VOUT stabilization, critical for FPGA and microcontroller sequencing. |
| Thermal Shutdown | 160°C with 30°C hysteresis - protects against sustained overload while enabling automatic recovery after cooling. |
Pinout & Package
MP2148GQD-18-Z is housed in an ultra-compact QFN-6 package (1.0mm × 1.5mm, 0.5mm pitch) with exposed thermal pad for enhanced power dissipation in thermally constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB/PG | Power Good Indicator (open-drain) | Active-low signal asserts when VOUT drops below 85% of 1.8V; requires external 100kΩ–500kΩ pull-up to voltage ≤ VIN. |
| 2 GND | Power Ground | Primary return path for input, output, and internal switching currents; must be connected to solid ground plane under exposed pad. |
| 3 VIN | Input Supply | Accepts 2.3V–5.5V unregulated input; requires ≥10μF ceramic decoupling capacitor placed adjacent to pins 2 and 3. |
| 4 SW | Switching Node | Drain of internal high-side MOSFET; connects directly to inductor; must be routed short and away from sensitive analog traces. |
| 5 EN | Enable Control | Logic-high (>1.2V) enables regulation; logic-low (<0.4V) disables converter and activates internal 1kΩ output discharge path. |
| 6 OUT | Output Power Rail | Delivers regulated 1.8V; connects to load and output capacitor; serves as voltage sense point for internal feedback loop. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ sleep mode | 11μA quiescent current enables >1-year battery life in coin-cell–powered sensors with 10μA average load. |
| Integrated power-good indicator | Dedicated open-drain PG pin with 70μs delay and ±5% window eliminates need for external supervisor IC in compact designs. |
| Hiccup-mode short-circuit protection | Auto-recovering fault response limits average power dissipation during sustained shorts, preventing thermal runaway. |
| 100% duty-cycle capability | Enables dropout operation down to VIN = VOUT, supporting brownout resilience in Li-ion systems nearing end-of-discharge. |
| Stable with ceramic output capacitors | No external compensation required - simplifies BOM and layout for designs using standard 10μF X5R/X7R ceramics. |
Applications
| Wearable Health Monitor | Bluetooth LE Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG sensing powered by CR2032 or rechargeable Li-ion cell. IC Role / Device Role / Timing Role: Primary 1.8V I/O and sensor interface rail generator with precise power-good signaling for MCU wake-up synchronization. Use Value: 11μA IQ extends battery runtime beyond 6 months; 2.2MHz switching avoids audible noise and enables <2mm² total solution size. | Use Scenario: Compact environmental sensor (temp/humidity/pressure) transmitting data via Bluetooth Low Energy. IC Role / Device Role / Timing Role: Fixed 1.8V supply for BLE SoC digital core and analog front-end, sequenced via EN pin during deep-sleep wake cycles. Use Value: PG pin triggers MCU reset only after VOUT stabilizes within ±1.2%, ensuring reliable radio initialization and eliminating boot failures. |
| Industrial IoT Edge Node | Low-Voltage FPGA I/O Bank |
Use Scenario: Battery- or energy-harvesting–powered condition-monitoring node in factory automation. IC Role / Device Role / Timing Role: Main 1.8V rail for microcontroller, wireless transceiver, and precision ADC, with hiccup-mode protection against field-wiring faults. Use Value: 160°C thermal shutdown with 30°C hysteresis prevents latch-up during ambient temperature spikes; QFN-6 footprint eases conformal coating. | Use Scenario: Powering 1.8V I/O banks on Spartan-7 or iCE40UP FPGA in space-limited embedded vision modules. IC Role / Device Role / Timing Role: Dedicated point-of-load regulator with fast transient response to handle dynamic I/O switching currents up to 1A peak. Use Value: Constant-on-time control delivers <10μs load-step response; 120mΩ/80mΩ MOSFETs minimize dropout and thermal rise at full load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS62231DRYR | 1.8V fixed, 300mA max, 2.25MHz, 17μA IQ, SOT-563 package | Limited to 300mA - insufficient for 1A FPGA I/O or sensor hub loads. | Select only for sub-300mA wearables where board area is secondary to cost. |
| Analog Devices ADP2119ACPZ-R7 | 1.8V fixed, 1A, 3MHz, 30μA IQ, 10-lead LFCSP (2mm × 2mm) | Larger 2mm × 2mm footprint and higher IQ reduce battery life and board density vs. MP2148GQD-18-Z. | Consider only if 3MHz switching is mandatory to avoid sensitive IF bands, accepting 2.7× higher IQ. |
Compared with TPS62231DRYR and ADP2119ACPZ-R7, MP2148GQD-18-Z uniquely combines 1A capability, 11μA IQ, and 1.0mm × 1.5mm footprint-making it optimal for miniaturized 1.8V systems requiring both high current and multi-year battery life.
Availability
MP2148GQD-18-Z is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, industrial IoT edge nodes, and low-voltage FPGA I/O banks requiring stable component supply and long-term lifecycle support.
Supply support for MP2148GQD-18-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 MP2148 product line targets ultra-compact, low-IQ DC/DC conversion for battery-powered and space-constrained applications-emphasizing integration, efficiency, and ease of use in portable and wearable electronics.
FAQ
What is the maximum allowable input voltage for MP2148GQD-18-Z?
The absolute maximum input voltage is 6V, but the recommended operating range is strictly 2.3V to 5.5V. Exceeding 5.5V risks permanent damage to the internal MOSFETs and control circuitry, as confirmed by MPS Absolute Maximum Ratings table. Operation above 5.5V voids warranty and may trigger immediate thermal shutdown.
Does MP2148GQD-18-Z require external feedback resistors?
No. Unlike the adjustable MP2148GQD variant, the MP2148GQD-18-Z has factory-trimmed internal feedback for fixed 1.8V output. Pin 1 functions solely as an open-drain Power Good (PG) indicator-not a feedback input-so no external resistor divider is needed or supported.
Can MP2148GQD-18-Z operate in 100% duty cycle mode?
Yes. The device supports 100% duty cycle operation, allowing VOUT to remain regulated even when VIN drops to the output voltage level (e.g., VIN = 1.8V). This feature maintains system uptime during battery brownout conditions, as verified in the Electrical Characteristics table under "100% Duty Cycle" specification.
What is the purpose of the exposed thermal pad on the QFN-6 package?
The exposed pad (EPAD) provides the primary thermal conduction path from the die to the PCB. It must be soldered to a solid copper thermal pad connected to ≥2 internal ground planes via ≥4 thermal vias (0.3mm diameter) to achieve the specified θJA of 220°C/W and prevent junction temperature exceedance at 1A load.
How does the power-good (PG) pin behave during startup and fault conditions?
The PG pin remains low until VOUT reaches 90% of 1.8V, then pulls high after a 70μs delay. If VOUT falls below 85% of 1.8V (e.g., due to overload or short), PG immediately pulls low. During shutdown (EN = low), PG is high-impedance-no internal pull-up-requiring external bias for defined logic state.
Is output capacitor ESR critical for stability with MP2148GQD-18-Z?
No. The MP2148GQD-18-Z is internally compensated and stable with low-ESR ceramic capacitors (e.g., 10μF X5R/X7R) without requiring minimum ESR. Unlike older buck controllers, it does not rely on capacitor ESR for loop compensation-confirmed by "Stable with Low ESR Output Ceramic Capacitors" in the official features list.
What happens to the output during shutdown (EN = low)?
When EN is pulled low, the MP2148GQD-18-Z disables switching and activates an internal 1kΩ discharge MOSFET between OUT and GND. This actively discharges the output capacitor, bringing VOUT to near-zero volts within milliseconds-preventing floating rails that could cause downstream latch-up or leakage in powered-off subsystems.
MP2148GQD-18-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 6-VFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-QFN (1x1.5)
MP2148GQD-18-Z FAQ
1.How can I place an order for MP2148GQD-18-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2148GQD-18-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 MP2148GQD-18-Z reliable?
The price and inventory of MP2148GQD-18-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2148GQD-18-Z is usually 5 days.
3.What payment methods are accepted for MP2148GQD-18-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2148GQD-18-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2148GQD-18-Z?
MP2148GQD-18-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2148GQD-18-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 MP2148GQD-18-Z?
For technical support, including MP2148GQD-18-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2148GQD-18-Z requirements.
6.How does Aetrix verify that MP2148GQD-18-Z is sourced from the original manufacturer or authorized distributors?
All MP2148GQD-18-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 MP2148GQD-18-Z meets industry standards.
7.What is the process for return or replacement of MP2148GQD-18-Z?
All MP2148GQD-18-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2148GQD-18-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 MP2148GQD-18-Z part is unused and in its original packaging.
Return procedure for MP2148GQD-18-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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