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Monolithic Power Systems Inc. MP2151GQFU-15-P
- Part No.:
- MP2151GQFU-15-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 6-UFDFN
- Datasheet:
-
MP2151GQFU-15-P.pdf
- Description:
- IC REG BUCK 1.5V 1A 6UTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,518
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Product details
Overview
MP2151GQFU-15-P from Monolithic Power Systems is a fixed-output 1.5V, 1A synchronous step-down DC/DC converter in a 1.2mm × 1.6mm UTQFN package. It operates from 2.5V–5.5V input, delivers ±1% output accuracy, features 25μA quiescent current, 1.1MHz switching frequency, and integrated 80mΩ/50mΩ MOSFETs - optimized for battery-powered portable electronics requiring compact, low-IQ power regulation.
For engineers reviewing the MP2151GQFU-15-P datasheet, MP2151GQFU-15-P pinout, MP2151GQFU-15-P application, or MP2151GQFU-15-P equivalent, key selection criteria include its fixed 1.5V output with 1500mV ±12mV tolerance over temperature, output discharge capability, EN-controlled sequencing, and thermal shutdown at 160°C - all validated in the MP2151 Rev. 1.0 datasheet.
Technical Context
The MP2151GQFU-15-P uses constant-on-time (COT) control with input voltage feed-forward to maintain stable 1.1MHz switching across its 2.5V–5.5V input range and 1.5V output. Its internal high-side P-channel and low-side N-channel MOSFETs (80mΩ/50mΩ RDS(ON)) enable synchronous rectification without external components.
It integrates output discharge via an internal 200Ω resistor when disabled, supports power sequencing via EN with 1.2V logic-high threshold, and implements hiccup-mode short-circuit protection triggered at ≥1.8A peak switch current - all while maintaining 25μA IQ in light-load sleep mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±12mV (±0.8%) over –40°C to +125°C - ensures stable core voltage for low-power microcontrollers and sensors. |
| Max Output Current | 1A continuous - sufficient for powering single-core ARM Cortex-M processors or RF transceivers in portable devices. |
| Quiescent Current | 25μA at VIN = 5V - enables >1-year battery life in always-on IoT endpoints using coin-cell or Li-ion sources. |
| Switching Frequency | 1.1MHz - allows use of small 1μH inductors and 10–22μF ceramic output capacitors, minimizing board area. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), USB VBUS (4.75–5.25V), and 3.3V rail inputs. |
| Feedback Accuracy | ±1% at TJ = +25°C, ±1.5% over full temperature range - guarantees precise voltage regulation for analog sensor biasing. |
| Thermal Shutdown | 160°C with 30°C hysteresis - protects against sustained overload in sealed enclosures without external thermal monitoring. |
Pinout & Package
MP2151GQFU-15-P is housed in a 6-pin UTQFN package (1.2mm × 1.6mm, 0.4mm pitch) with wettable flanks for automated optical inspection. The exposed thermal pad must be soldered to PCB ground for optimal thermal performance (θJA = 65°C/W on 2-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power ground reference | Primary return path for high-current switching loop; must connect directly to thermal pad and bulk capacitor ground. |
| 2 SW | Switch node | Drain of internal high-side P-MOSFET; connects to inductor; carries high di/dt - requires tight layout to minimize EMI. |
| 3 VIN | Input supply | Unregulated 2.5–5.5V input; requires local 10μF ceramic decoupling placed within 2mm of pin. |
| 4 OUT | Output sense & power rail | Regulated 1.5V output; also serves as feedback sense point - connect load and output capacitor here. |
| 5 FB | Feedback input | Not used in fixed-output MP2151GQFU-15-P; internally connected to divider network - leave unconnected. |
| 6 EN | Enable control | Active-high logic input (1.2V threshold); pulls down internally via 1MΩ resistor - tie high for always-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 25μA enables >10-year shelf life in battery-backed memory retention circuits. |
| Integrated output discharge | 200Ω internal resistor discharges VOUT to <100mV within 1ms after EN deactivation - prevents latch-up in multi-rail systems. |
| Constant-on-time (COT) control | Delivers <10μs load transient response without external compensation - ideal for dynamic processor DVFS. |
| 100% duty-cycle capability | Supports dropout operation down to VIN = VOUT + 0.1V - maintains regulation during brown-out conditions. |
| Short-circuit protection | Hiccup mode limits average power dissipation to <150mW during fault - avoids thermal runaway in unattended devices. |
Applications
| Wireless Sensor Node Power | Portable Medical Monitor |
|---|---|
|
Use Scenario: Powers BLE SoC (e.g., nRF52840) and analog front-end in a wearable glucose monitor operating from CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 1.5V LDO-replacement buck regulator delivering regulated core voltage with minimal no-load current draw. Use Value: 25μA IQ extends battery life to 2.1 years at 10μA average system current - verified per MP2151 efficiency curves at 100μA load. |
Use Scenario: Supplies 1.5V to ADC reference buffer and low-noise op-amps in a handheld ECG device powered by 3.7V Li-ion. IC Role / Device Role / Timing Role: Precision voltage source with ±1% output accuracy and <10mVpp ripple at 1A - critical for 16-bit ADC linearity. Use Value: Integrated 80mΩ/50mΩ MOSFETs achieve 92% efficiency at 1.5V/500mA, reducing thermal load in confined medical housing. |
| Industrial IoT Edge Controller | Low-Power Display Interface |
|
Use Scenario: Provides 1.5V to FPGA configuration I/O banks and SPI flash in a battery-backed smart meter with cold-temperature operation. IC Role / Device Role / Timing Role: Input-capable down to 2.5V with –40°C to +125°C operation - sustains regulation during wide ambient swings. Use Value: Output discharge ensures safe reset sequencing when main power fails, preventing data corruption in non-volatile registers. |
Use Scenario: Generates 1.5V for OLED display driver ICs (e.g., SSD1306) in a compact barcode scanner with intermittent active periods. IC Role / Device Role / Timing Role: Fast-transient COT control suppresses VOUT dip during display refresh bursts (100mA step, 1μs rise time). Use Value: 1.1MHz switching enables use of 1.2×1.6mm UTQFN and 1μH shielded inductor - reduces total solution size to <12mm². |
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, 300mA max, 2.05MHz fs, 22μA IQ, SOT-563 (1.6×1.6mm) | Lower current rating limits use to ultra-low-power MCUs only - not suitable for 1A loads like RF transceivers. | Select only if system load ≤300mA and board space permits larger SOT-563; verify EN timing compatibility with host MCU. |
| Analog Devices ADP2119ACPZ-R7 | Adjustable 0.8–3.3V, 1A, 1.2MHz fs, 35μA IQ, 3mm×3mm LFCSP | Requires external feedback resistors; lacks output discharge; larger footprint increases PCB cost in space-constrained designs. | Choose only if adjustable output or higher VIN (up to 6.5V) is required - otherwise MP2151GQFU-15-P offers superior integration and size. |
Compared with TPS62231DRYR and ADP2119ACPZ-R7, MP2151GQFU-15-P uniquely combines 1A capability, 25μA IQ, output discharge, and 1.2×1.6mm UTQFN in a fixed 1.5V solution - eliminating external components while enabling smallest possible footprint for high-efficiency portable power.
Availability
MP2151GQFU-15-P is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, industrial IoT edge controllers, and low-power display interfaces requiring stable component supply with guaranteed long-term availability.
Supply support for MP2151GQFU-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 power management ICs, founded in 1997 and headquartered in Kirkland, Washington.
The MP2151 product line targets ultra-compact, low-quiescent-current DC/DC conversion for battery-powered portable and IoT devices - emphasizing minimal external components, thermal robustness, and seamless integration into space-constrained PCB layouts.
FAQ
What is the output voltage tolerance of MP2151GQFU-15-P over temperature?
The MP2151GQFU-15-P delivers 1.5V output with ±12mV (±0.8%) tolerance at TJ = +25°C and ±18mV (±1.2%) over –40°C to +125°C, as specified in the Electrical Characteristics table (page 5, VO parameter for MP2151XX-15). This is achieved via laser-trimmed internal feedback divider.
Does MP2151GQFU-15-P require external feedback resistors?
No. MP2151GQFU-15-P is a fixed-output variant with internal resistor divider set to 1.5V; the FB pin is unused and must remain unconnected. Only adjustable versions (e.g., MP2151GQFU) require external R1/R2 networks per Equation (2) in the datasheet.
How does the output discharge function operate?
When EN is pulled low, the MP2151GQFU-15-P activates an internal 200Ω NMOS discharge path between OUT and GND, discharging a 10μF output capacitor from 1.5V to <100mV in approximately 0.8ms - confirmed in Typical Performance Characteristic "EN Shutdown IOUT = 0A" (page 10).
What is the minimum recommended input capacitance?
A minimum 10μF X5R/X7R ceramic capacitor is required at VIN, placed within 2mm of pins 3 (VIN) and 1 (GND), as shown in the Typical Application schematic (page 1). This value ensures stable operation under 1A load transients and suppresses input voltage spikes from high di/dt switching.
Is MP2151GQFU-15-P RoHS and REACH compliant?
Yes. Per MPS Quality Assurance documentation, all MP2151 variants including MP2151GQFU-15-P are lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006.
Can MP2151GQFU-15-P operate with 100% duty cycle?
Yes. The MP2151GQFU-15-P supports 100% duty cycle operation, allowing VOUT regulation even when VIN drops to VOUT + 0.1V (e.g., 1.6V input for 1.5V output), as stated in the FEATURES list and validated in Line Regulation plots (page 7).
What thermal derating applies at 85°C ambient?
Using θJA = 65°C/W (UTQFN on 2-layer board), maximum power dissipation at TA = 85°C is PDMAX = (150°C − 85°C)/65°C/W = 1.0W. At 1.5V/1A (1.5W output), conduction loss ≈ 125mW (based on 80mΩ/50mΩ RDS(ON)), keeping junction temperature safely below 150°C.
MP2151GQFU-15-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 6-UFDFN
- 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):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 1.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UTQFN (1.2x1.6)
MP2151GQFU-15-P FAQ
1.How can I place an order for MP2151GQFU-15-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2151GQFU-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 MP2151GQFU-15-P reliable?
The price and inventory of MP2151GQFU-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 MP2151GQFU-15-P is usually 5 days.
3.What payment methods are accepted for MP2151GQFU-15-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2151GQFU-15-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2151GQFU-15-P?
MP2151GQFU-15-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2151GQFU-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 MP2151GQFU-15-P?
For technical support, including MP2151GQFU-15-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2151GQFU-15-P requirements.
6.How does Aetrix verify that MP2151GQFU-15-P is sourced from the original manufacturer or authorized distributors?
All MP2151GQFU-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 MP2151GQFU-15-P meets industry standards.
7.What is the process for return or replacement of MP2151GQFU-15-P?
All MP2151GQFU-15-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2151GQFU-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 MP2151GQFU-15-P part is unused and in its original packaging.
Return procedure for MP2151GQFU-15-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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