My Inquiry
My Account
Monolithic Power Systems Inc. MP2148GQD-Z
- Part No.:
- MP2148GQD-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 6-VFDFN
- Datasheet:
-
MP2148GQD-Z.pdf
- Description:
- IC REG BUCK ADJ 1A 6QFN
- Quantity:
- Payment:
- Shipping:
Inventory:323
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP2148GQD-Z from Monolithic Power Systems is a 1A synchronous step-down DC/DC converter with 11µA quiescent current, Constant-On-Time control, and integrated 120mΩ/80mΩ MOSFETs. It operates from 2.3V–5.5V input, regulates output down to 0.6V, and delivers stable power in ultra-small QFN-6 (1.0mm×1.5mm) for portable and battery-powered systems.
For engineers reviewing the MP2148GQD-Z datasheet, MP2148GQD-Z pinout, MP2148GQD-Z application, or MP2148GQD-Z equivalent, key selection criteria include its 2.2MHz switching frequency, 100% duty cycle capability, output discharge function, thermal shutdown at 160°C, and compatibility with low-ESR ceramic output capacitors.
Technical Context
The MP2148GQD-Z uses Constant-On-Time (COT) control with input-voltage feed-forward to maintain near-constant switching frequency across 2.3V–5.5V input and 0.6V–5.5V output ranges. Its internal high-side P-MOSFET (120mΩ) and low-side N-MOSFET (80mΩ) enable synchronous rectification and 1A continuous output.
Sleep mode and Advanced Asynchronous Modulation (AAM) with Zero Current Detection (ZCD) reduce quiescent current to 11µA under light load while maintaining regulation. EN pin enables precise power sequencing, and FB pin supports adjustable output via external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3V to 5.5V - supports single-cell Li-ion, Li-polymer, and 3.3V/5V rail inputs without pre-regulation |
| Output Current | 1A continuous - sufficient for core logic, RF transceivers, and low-power microcontrollers |
| Quiescent Current | 11µA - enables multi-year battery life in always-on wearable and IoT sensors |
| Switching Frequency | 2.2MHz typical - allows use of compact 1µH inductors and minimizes EMI in space-constrained PCBs |
| Feedback Voltage | 600mV ±6mV - sets output voltage accuracy to ±1% over temperature with standard 1% resistors |
| Thermal Shutdown | 160°C with 30°C hysteresis - provides robust overtemperature protection without latch-up |
| Minimum On/Off Time | 60ns each - enables stable operation at high VIN/VOUT ratios (e.g., 5V→0.6V) and prevents subharmonic oscillation |
Pinout & Package
MP2148GQD-Z is housed in a thermally enhanced QFN-6 package (1.0mm × 1.5mm, 0.5mm pitch) with exposed thermal pad for efficient heat dissipation in ultra-dense layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB/PG | Feedback Input / Power Good Output | FB mode only on MP2148GQD-Z: senses output voltage via resistor divider; no PG function on this variant |
| 2 GND | Power Ground | Main return path for input/output currents; must be connected to thermal pad for optimal thermal performance |
| 3 VIN | Input Supply | Accepts 2.3V–5.5V unregulated input; requires local 10µF ceramic decoupling capacitor |
| 4 SW | Switch Node | Drain of internal high-side P-MOSFET; connects directly to inductor; high dv/dt node requiring short trace routing |
| 5 EN | Enable Control | Active-high logic input (1.2V threshold); internal 1MΩ pull-down enables default disable on power-up |
| 6 OUT | Output Power Rail | Delivers regulated output; also serves as output voltage sense point; requires local 10µF ceramic output capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 11µA enables >10-year battery life in coin-cell–powered devices like medical patches and BLE sensors |
| Integrated power MOSFETs | 120mΩ P-FET + 80mΩ N-FET eliminate external switches and reduce BOM count by 4 components |
| Output discharge function | Internal 1kΩ discharge path automatically bleeds output capacitor when EN = low, preventing residual voltage hold-up |
| 100% duty cycle operation | Maintains regulation even when VIN ≈ VOUT (e.g., 3.3V input → 3.3V output), eliminating dropout issues |
| Short-circuit hiccup protection | Enters timed restart cycle on overload-limits average power dissipation and prevents thermal runaway |
Applications
| Wireless Networking Cards | Portable Medical Sensors |
|---|---|
Use Scenario: Powering 2.4GHz/5GHz Wi-Fi/BT SoCs and RF front-end modules in M.2 and mini-PCIe cards. IC Role / Device Role / Timing Role: Primary buck regulator delivering 1.2V/1.8V/3.3V to baseband processors and transceivers. Use Value: 2.2MHz switching avoids interference with 2.4GHz ISM band; 11µA IQ extends runtime during deep-sleep beacon intervals. | Use Scenario: Supplying ultra-low-power ECG, SpO₂, and temperature sensor nodes in patch-style wearables. IC Role / Device Role / Timing Role: Main system regulator converting CR2032 or Li-SOCl₂ battery voltage to stable 1.8V/3.0V rails. Use Value: 11µA IQ enables >5-year shelf life; output discharge ensures safe reset between patient measurements. |
| Industrial IoT Edge Nodes | Low-Voltage I/O Power Supplies |
Use Scenario: Powering ARM Cortex-M based edge controllers with LoRaWAN or NB-IoT modems in remote monitoring units. IC Role / Device Role / Timing Role: Primary DC/DC stage stepping down 3.6V–5.5V battery or energy-harvested input to 3.3V MCU and 1.2V sensor interface rails. Use Value: COT control delivers <10µs transient response to modem transmit bursts; thermal shutdown protects against enclosure overheating. | Use Scenario: Generating clean 1.2V, 1.8V, or 2.5V supplies for FPGA I/O banks, ADC reference buffers, and LVDS drivers. IC Role / Device Role / Timing Role: Point-of-load regulator placed adjacent to high-speed digital ICs to minimize noise coupling. Use Value: Stable operation with low-ESR ceramic caps reduces output ripple to <10mVpp; 60ns min on/off time supports wide VIN/VOUT ratios. |
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 |
|---|---|---|---|
| TI TPS62231DRYR | 2.25V–6.5V input; 1.2A output; 17µA IQ; 3.6MHz switching; no output discharge | Higher input range suits 6V industrial batteries; higher fSW enables smaller inductors but increases EMI risk | Select when needing >5.5V input support and can manage higher EMI; avoid if output discharge is required for safety compliance |
| Analog Devices ADP5062ACBZ-1-R7 | 2.3V–5.5V input; 1A output; 25µA IQ; 2.25MHz switching; fixed 1.2V/1.5V/1.8V variants only | Lacks adjustable FB pin; no sleep mode; higher IQ reduces battery life in always-on designs | Select for cost-sensitive fixed-output applications where programmability and ultra-low IQ are not critical |
Compared with MP2148GQD-Z, TPS62231DRYR offers wider input range but lacks output discharge and has higher IQ, while ADP5062ACBZ-1-R7 sacrifices adjustability and efficiency for lower unit cost in fixed-voltage deployments.
Availability
MP2148GQD-Z is available at Aetrix Electronics and suitable for wireless networking cards, portable medical sensors, and industrial IoT edge nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MP2148GQD-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.
The MP2148 product line targets ultra-compact, battery-optimized DC/DC conversion for portable, wearable, and energy-constrained embedded systems-emphasizing minimal footprint, lowest possible IQ, and seamless integration with ceramic passives.
FAQ
What is the minimum recommended output capacitor value for MP2148GQD-Z?
A 10µF X5R/X7R ceramic capacitor is the minimum recommended value for stable operation across all loads and input voltages. The device is optimized for low-ESR ceramics, and using smaller values risks instability or excessive output ripple-especially at light loads where AAM mode dominates.
Does MP2148GQD-Z support forced PWM mode, or is it strictly COT-based?
MP2148GQD-Z operates exclusively in Constant-On-Time (COT) mode with automatic transition between CCM, DCM, and sleep modes. It does not support forced PWM or frequency synchronization; its switching frequency varies slightly with input/output conditions but remains centered at 2.2MHz due to input-voltage feed-forward.
Can MP2148GQD-Z regulate output below 0.6V?
No-the internal feedback reference is fixed at 600mV, and the datasheet specifies 0.6V as the minimum regulated output voltage. Attempting to set lower outputs via external resistor scaling violates the FB pin's operating range and results in loss of regulation and potential instability.
Is the exposed thermal pad on the QFN-6 package electrically connected internally?
Yes-the exposed thermal pad is internally connected to GND and must be soldered to a dedicated PCB thermal pad tied to the main ground plane. Failure to connect it degrades thermal performance by >40°C and may trigger premature thermal shutdown under 1A load.
How does the output discharge function behave during EN pin assertion?
When EN is pulled low, the internal 1kΩ discharge FET activates between OUT and GND, discharging the output capacitor with a time constant determined by COUT × 1kΩ. This occurs within microseconds and ensures VOUT falls below 100mV within ~5ms for a 10µF capacitor-critical for safe system reset and isolation.
What is the maximum allowable inductor DCR for 1A operation?
The maximum recommended inductor DC resistance is 15mΩ to maintain ≥85% efficiency at full 1A load and 3.6V input. Higher DCR increases conduction losses, raises junction temperature, and may cause thermal derating before reaching rated current-especially in enclosed or high-ambient environments.
MP2148GQD-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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- 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-Z FAQ
1.How can I place an order for MP2148GQD-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2148GQD-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-Z reliable?
The price and inventory of MP2148GQD-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-Z is usually 5 days.
3.What payment methods are accepted for MP2148GQD-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2148GQD-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2148GQD-Z?
MP2148GQD-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2148GQD-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-Z?
For technical support, including MP2148GQD-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2148GQD-Z requirements.
6.How does Aetrix verify that MP2148GQD-Z is sourced from the original manufacturer or authorized distributors?
All MP2148GQD-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-Z meets industry standards.
7.What is the process for return or replacement of MP2148GQD-Z?
All MP2148GQD-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2148GQD-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-Z part is unused and in its original packaging.
Return procedure for MP2148GQD-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP2148GQD-Z Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
