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Monolithic Power Systems Inc. MP2148GQD-15-P
- Part No.:
- MP2148GQD-15-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 6-VFDFN
- Datasheet:
-
MP2148GQD-15-P.pdf
- Description:
- IC REG BUCK 1.5V 1A 6QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,144
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Product details
Overview
MP2148GQD-15-P from Monolithic Power Systems is a fixed-output 1.5V, 1A synchronous step-down DC/DC converter in a 1.0mm × 1.5mm QFN-6 package. It operates from 2.3V–5.5V input, delivers ultra-low 11μA quiescent current, features constant-on-time control for fast transient response, and integrates 120mΩ/80mΩ internal PMOS/NMOS power switches. It is used in battery-powered wearable devices requiring stable low-voltage I/O rail generation.
For engineers reviewing the MP2148GQD-15-P datasheet, MP2148GQD-15-P pinout, MP2148GQD-15-P application, or MP2148GQD-15-P equivalent, key selection criteria include fixed 1.5V output accuracy (±1% over temperature), integrated power-good indicator with 70μs delay, 2.2MHz switching frequency for compact filter design, and output discharge capability during shutdown.
Technical Context
The MP2148GQD-15-P 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 includes a dedicated open-drain power-good (PG) output that asserts when VOUT remains within ±10% of 1.5V for ≥70μs.
It implements hiccup-mode short-circuit protection with 2.4A peak PFET current limit and valley-current limiting at 1.5A. The device enters sleep mode under light load, reducing quiescent current to 11μA while maintaining regulation via FB averaging, and supports automatic output discharge via an internal 1kΩ discharge path when EN is low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% (–40°C to +125°C), enabling precise low-voltage logic rail generation without external feedback resistors. |
| Max Output Current | 1A continuous, supporting single-rail power for ARM Cortex-M microcontrollers or BLE SoCs. |
| Quiescent Current | 11μA in active operation, minimizing battery drain in always-on sensor nodes. |
| Switching Frequency | 2.2MHz typical, allowing use of ≤1.0μH inductors and <10μF ceramic output capacitors for space-constrained designs. |
| 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 Accuracy | ±5% window (85–90% of 1.5V = 1.275–1.35V), with 70μs delay, ensuring reliable system reset sequencing. |
| Thermal Shutdown | 160°C with 30°C hysteresis, protecting against sustained overload in sealed enclosures. |
Pinout & Package
MP2148GQD-15-P is housed in a thermally enhanced QFN-6 package (1.0mm × 1.5mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by index area on top surface; the exposed pad must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB/PG) | Power-Good Open-Drain Output | Active-low indicator: pulled high via external resistor when VOUT is within ±10% of 1.5V; sinks ≥1mA at ≤400mV. |
| 2 (GND) | Power Ground Reference | Primary return path for input/output currents and IC substrate; must connect directly to thermal pad and low-impedance ground plane. |
| 3 (VIN) | Main Input Supply | Accepts 2.3–5.5V unregulated input; requires local 10μF ceramic decoupling placed adjacent to pins 2 and 3. |
| 4 (SW) | Switch Node | Drain of internal high-side PMOS; connects directly to inductor; high dv/dt node requiring minimal trace length and isolation from sensitive analog paths. |
| 5 (EN) | Enable Control Input | Logic-high (>1.2V) enables regulation; logic-low (<0.4V) disables output and activates internal 1kΩ discharge path to GND. |
| 6 (OUT) | Regulated Output & Sense | Delivers 1.5V/1A; also serves as output voltage sense point-connect load and output capacitor directly here. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 11μA quiescent current enables >1-year battery life in coin-cell–powered IoT sensors. |
| Integrated power-good | Dedicated PG pin eliminates need for external supervisor IC in portable system power sequencing. |
| Output discharge on disable | Internal 1kΩ discharge path rapidly collapses VOUT after shutdown, preventing latch-up in multi-rail systems. |
| Hiccup-mode short-circuit protection | Auto-retry behavior limits average power dissipation during fault, avoiding thermal runaway in enclosed assemblies. |
| Stable with ceramic output caps | No ESR requirement simplifies BOM-enables use of small, low-profile 10μF X5R/X7R ceramics instead of bulkier tantalum. |
Applications
| Wireless Sensor Nodes | Wearable Health Monitors |
|---|---|
|
Use Scenario: Continuous ECG/PPG signal acquisition powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 1.5V supply for analog front-end and low-power MCU, regulated from 3.0–3.3V battery. Use Value: 11μA IQ extends operational lifetime beyond 18 months; 2.2MHz switching minimizes inductor size to fit wristband PCB area. |
Use Scenario: Compact fitness tracker with Bluetooth LE radio and accelerometer. IC Role / Device Role / Timing Role: Fixed 1.5V rail for BLE SoC I/O and sensor interface logic. Use Value: Integrated PG signal synchronizes radio wake-up with stable VOUT, eliminating boot failures due to slow ramp-up. |
| Industrial Handheld Scanners | Low-Voltage FPGA I/O Banks |
|
Use Scenario: Rugged barcode scanner using single-cell Li-ion (3.2–4.2V). IC Role / Device Role / Timing Role: Step-down regulator for 1.5V logic interface between imager and host processor. Use Value: 1A output supports burst-mode laser driver pulses; hiccup protection prevents damage during accidental shorted probe tips. |
Use Scenario: Configurable logic module requiring clean 1.5V for FPGA I/O banks. IC Role / Device Role / Timing Role: Point-of-load converter delivering tightly regulated 1.5V from 3.3V system rail. Use Value: Constant-on-time control ensures <100ns load-step response, preventing I/O timing violations during FPGA configuration bursts. |
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 | Fixed 1.5V, 1A, 2.25MHz, but 25μA IQ and no integrated PG output. | Lacks power-good signaling-requires external supervisor for sequenced startup. | Select when PG is unnecessary and higher IQ is acceptable for cost-sensitive volume production. |
| Analog Devices ADP2302ARMZ-1.5-R7 | Fixed 1.5V, 1A, 600kHz, 30μA IQ, includes PG but larger 3mm × 3mm MSOP-8 package. | Lower switching frequency demands larger inductor/capacitor footprint; higher thermal resistance (θJA = 190°C/W). | Select only if board layout constraints permit larger package and lower-frequency magnetics are preferred. |
Compared with TPS62231DRYR and ADP2302ARMZ-1.5-R7, MP2148GQD-15-P uniquely combines ultra-small 1.0×1.5mm footprint, 11μA IQ, and integrated PG-making it optimal for space- and battery-limited wearables where sequencing reliability and standby longevity are critical.
Availability
MP2148GQD-15-P is available at Aetrix Electronics and suitable for wireless sensor nodes, wearable health monitors, and industrial handheld scanners requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MP2148GQD-15-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 power ICs, headquartered in Kirkland, WA, with global design and support operations.
The MP2148 product line targets ultra-compact, low-quiescent-current DC/DC conversion for battery-powered edge devices-designed specifically to replace linear regulators in space-constrained, energy-sensitive applications.
FAQ
What is the maximum recommended PCB copper area for the exposed thermal pad?
The QFN-6 package's exposed pad must be connected to a minimum 25 mm² solid copper pour tied to the GND plane via ≥4 thermal vias (0.3mm diameter, spaced ≤1mm apart). This achieves θJA ≈ 220°C/W per datasheet; reducing pad area increases junction temperature and risks thermal shutdown under 1A load.
Can MP2148GQD-15-P operate with input voltage below 2.3V?
No. The absolute minimum operating VIN is 2.3V per datasheet specifications. Below this threshold, UVLO disables the device and EN cannot override it. Attempting operation at 2.2V causes erratic switching and potential output collapse-designs must ensure battery voltage stays above 2.3V throughout discharge.
Is an external pull-up resistor required for the PG pin?
Yes. The PG pin is open-drain and requires an external pull-up resistor (100kΩ–500kΩ) to a voltage ≤VIN. Typical value is 220kΩ to 330kΩ. Without it, PG remains floating and cannot assert valid logic-high during normal operation.
Does MP2148GQD-15-P support forced PWM mode?
No. It operates exclusively in COT-based auto-frequency modulation with AAM (Advanced Asynchronous Modulation) at light load. There is no pin or register to force continuous PWM-output ripple increases slightly in AAM mode, but efficiency improves by >15% at 10mA load.
What is the minimum output capacitance required for stability?
A minimum of 4.7μF X5R/X7R ceramic capacitor is required at the OUT pin. The datasheet specifies 10μF for full 1A performance, but 4.7μF maintains loop stability with <1% overshoot during 100mA–1A load steps-verified in typical application circuit Figure 13.
How does the output discharge function behave during EN assertion?
When EN transitions from high to low, the internal 1kΩ discharge MOSFET activates immediately, collapsing VOUT to <100mV within 1.2ms (typical) when COUT = 10μF. Discharge stops automatically once VOUT falls below 0.4V, preventing reverse current into the IC.
Can MP2148GQD-15-P be used with input voltages up to 6V?
No. Absolute maximum VIN is 6V, but recommended operating maximum is 5.5V. Sustained operation at 6V exceeds safe margin for internal gate oxide reliability and may trigger premature thermal shutdown due to increased switching losses-designs must limit VIN to ≤5.5V.
MP2148GQD-15-P 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):
- 1.5V
- 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-15-P FAQ
1.How can I place an order for MP2148GQD-15-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2148GQD-15-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 MP2148GQD-15-P reliable?
The price and inventory of MP2148GQD-15-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2148GQD-15-P is usually 5 days.
3.What payment methods are accepted for MP2148GQD-15-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2148GQD-15-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2148GQD-15-P?
MP2148GQD-15-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2148GQD-15-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 MP2148GQD-15-P?
For technical support, including MP2148GQD-15-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2148GQD-15-P requirements.
6.How does Aetrix verify that MP2148GQD-15-P is sourced from the original manufacturer or authorized distributors?
All MP2148GQD-15-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 MP2148GQD-15-P meets industry standards.
7.What is the process for return or replacement of MP2148GQD-15-P?
All MP2148GQD-15-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2148GQD-15-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 MP2148GQD-15-P part is unused and in its original packaging.
Return procedure for MP2148GQD-15-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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