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Monolithic Power Systems Inc. MP2040DQ-LF-P
- Part No.:
- MP2040DQ-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP2040DQ-LF-P.pdf
- Description:
- IC REG LINEAR POS ADJ 3A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,080
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Product details
Overview
MP2040DQ-LF-P from Monolithic Power Systems is a dual-supply, very low dropout linear regulator delivering up to 3A output current with 150mV dropout at full load, 0.51V feedback threshold, and adjustable 0.9V–3.3V output via external resistor divider. It employs separate BIAS (3.3–5.5V) and IN (1.1–5.5V) supplies to enable high-efficiency regulation near output voltage, used in post-regulation for switching power supplies feeding DSPs, ASICs, and microcontrollers.
For engineers reviewing the MP2040DQ-LF-P datasheet, MP2040DQ-LF-P pinout, MP2040DQ-LF-P application, or MP2040DQ-LF-P equivalent, key selection criteria include its dual-supply architecture, 3A fast-transient capability, 80µVRMS noise, 40dB PSRR at 100kHz, and compatibility with ultra-low-ESR 1µF ceramic output capacitors.
Technical Context
The MP2040DQ-LF-P uses an NMOS pass device driven by a dedicated BIAS supply (3.3–5.5V) to power internal reference and control circuitry, while load current flows directly from the lower-voltage IN rail (1.1–5.5V), minimizing conduction loss. Its feedback loop references a precision 0.51V bandgap, enabling stable 2% output accuracy across temperature and line variations.
Transient response is enhanced by internal soft-start (280µs), open-drain PGOOD with 440mV threshold and 80µs delay, and thermal protection with 135°C trip point and 15°C hysteresis. Stability is guaranteed with ≥1µF ceramic output capacitors due to optimized compensation for low-ESR operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A maximum continuous - supports high-current digital loads like ASICs and DSPs without external boost stages. |
| Dropout Voltage | 150mV at 3A - enables operation with VIN as low as VOUT + 0.15V, critical for battery-powered or tightly regulated systems. |
| Feedback Voltage | 0.51V ±1% - sets precise output via resistor divider; enables 0.9V–3.3V adjustment with <0.001%/mA load regulation. |
| PSRR | 40dB at 100kHz - suppresses high-frequency ripple from upstream switching converters, preserving signal integrity in sensitive analog/digital domains. |
| Output Noise | 80µVRMS (10Hz–100kHz) - low-noise performance suitable for powering RF sections, ADC references, and PLLs. |
| Quiescent Current | 0.1µA in shutdown - minimizes standby power in always-on subsystems and battery-backed applications. |
| Thermal Protection | 135°C trip with 15°C hysteresis - prevents permanent damage during overload or poor heatsinking; auto-recovery after cooldown. |
Pinout & Package
MP2040DQ-LF-P is housed in a 10-pin QFN package (3mm × 3mm, exposed thermal pad), RoHS-compliant and lead-free. Pin functions are validated per Monolithic Power Systems Rev. 1.01 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 2) | Power Input Source | Supplies load current directly through NMOS pass device; bypass with ≥1µF ceramic capacitor to GND. |
| BIAS (Pin 3) | Bias Supply Input | Powers internal reference and control circuitry; must be ≥3.3V and ≥2.5V above VOUT; bypass with ≥1µF ceramic capacitor. |
| FB (Pin 8) | Feedback Input | Monitors output via resistive divider; 0.51V threshold sets VOUT = 0.51 × (R1+R2)/R2; high-impedance input. |
| EN (Pin 7) | Enable Control | Active-high logic input; <0.8V disables regulator (IQ < 1µA); >1.5V enables; internal hysteresis prevents chatter. |
| GND (Pin 5) | Ground Reference | Common return for all circuits; connects to exposed thermal pad for optimal heat dissipation and noise immunity. |
| VOUT (Pins 9, 10) | Regulated Output | Delivers up to 3A; bypass with ≥4.7µF ceramic capacitor to GND for stability and transient response. |
| PGOOD (Pin 4) | Power-Good Indicator | Open-drain output; pulls low when VOUT < 90% of target; sinks ≥230µA; requires external pull-up to BIAS or VIN. |
| BYPASS (Pin 6) | Soft-Start Timing | Connects to 1nF capacitor to ground; controls 280µs soft-start ramp; no resistive loading permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Supply Architecture | Separates bias (3.3–5.5V) and power-input (1.1–5.5V) rails to minimize dropout loss while maintaining internal circuit integrity. |
| Ultra-Low-ESR Stability | Stable with 1µF ceramic output capacitors - eliminates need for bulky electrolytics and reduces board area in space-constrained designs. |
| Fast Transient Response | Minimizes output voltage deviation during rapid load steps (e.g., CPU burst modes) without external compensation components. |
| Integrated Protection | Combines current limiting (3.6A typ), thermal shutdown (135°C), and under-voltage lockout (2.35V BIAS threshold) for robust system-level reliability. |
| Low-Noise Regulation | 80µVRMS output noise enables clean power delivery to noise-sensitive analog blocks such as ADCs, DACs, and RF front-ends. |
Applications
| Telecom Baseband Processing | DSP/ASIC Core Power |
|---|---|
|
Use Scenario: Regulating power for multi-core baseband processors in 4G/5G small cells where thermal density and transient load spikes are extreme. IC Role / Device Role / Timing Role: Post-regulator supplying 1.2V/3A to processor cores, rejecting ripple from upstream DC/DC converters. Use Value: 150mV dropout enables use of 1.35V input rail, reducing conduction loss by >40% vs. conventional LDOs; 40dB PSRR at 100kHz suppresses switching noise. |
Use Scenario: Providing clean, tightly regulated voltage to high-speed DSPs in industrial vision systems requiring sub-1% output tolerance. IC Role / Device Role / Timing Role: Precision low-noise LDO delivering 1.8V/3A with 2% accuracy and 80µVRMS noise for analog signal chain integrity. Use Value: 0.51V feedback reference and <0.001%/mA load regulation ensure stable core voltage across wide temperature (-40°C to +85°C) and load ranges. |
| Industrial PLC I/O Modules | PAID Storage Controller Power |
|
Use Scenario: Powering isolated analog input/output channels in programmable logic controllers where EMI immunity and long-term stability are critical. IC Role / Device Role / Timing Role: Local LDO generating 3.3V/2.5A from intermediate 5V rail, with PGOOD signaling for system health monitoring. Use Value: Open-drain PGOOD (440mV threshold, 80µs delay) provides deterministic power sequencing and fault detection for safety-critical firmware boot. |
Use Scenario: Supplying 0.9V/3A to NAND flash controller ICs in enterprise SSDs where low dropout and fast load-step response prevent data corruption. IC Role / Device Role / Timing Role: High-current LDO with 280µs soft-start and fast transient recovery protecting flash memory timing margins during burst writes. Use Value: Dual-supply topology allows VIN = 1.1V (just above 0.9V VOUT), maximizing efficiency in ultra-low-voltage storage subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS7A8300RGRT | Single-supply LDO (no BIAS pin); 2A max; 125mV dropout at 2A; 50µVRMS noise; requires ≥2.2µF output cap. | Lacks dual-supply architecture - cannot achieve same low-VIN operation; better noise but lower current capacity. | Select when noise is primary concern and load ≤2A; avoid when VIN must be within 150mV of VOUT. |
| Analog Devices ADM7172ACPZ-R7 | Single-supply LDO; 2A max; 175mV dropout at 2A; 3.5µVRMS noise; 100% tested PSRR >60dB @ 10kHz. | Superior low-frequency PSRR and noise, but higher dropout and no BIAS-assisted efficiency; requires ≥10µF ceramic output cap. | Prefer for ultra-low-noise analog rails (e.g., ADC reference); not suitable for high-current, low-dropout digital core regulation. |
Compared with TPS7A8300RGRT and ADM7172ACPZ-R7, MP2040DQ-LF-P uniquely delivers 3A current with 150mV dropout via dual-supply architecture-enabling efficient operation where input voltage margin is minimal-while maintaining competitive noise and transient performance without demanding larger output capacitance.
Availability
MP2040DQ-LF-P is available at Aetrix Electronics and suitable for telecom baseband processing, industrial PLC I/O modules, and PAID storage controller power requiring stable component supply, RoHS compliance, and QFN-10 thermal performance.
Supply support for MP2040DQ-LF-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 San Jose, California.
The MP2040 belongs to MPS's high-current, fast-transient LDO product line, designed specifically for post-regulation in digitally intensive systems where efficiency, low noise, and tight voltage tolerance are non-negotiable.
FAQ
What is the minimum required BIAS voltage for MP2040DQ-LF-P to operate?
The BIAS pin requires a minimum of 3.3V to enable regulation, and must be at least 2.5V higher than the desired output voltage (e.g., for 1.2V VOUT, BIAS ≥ 3.7V). Below 2.35V, UVLO disables the part regardless of EN state. This ensures internal circuitry operates within specification before enabling output.
Can MP2040DQ-LF-P be used with only one supply rail?
Yes - if the single supply meets both requirements: ≥3.3V and ≥2.5V above the target VOUT, it can be connected to both BIAS and VIN pins. However, this forfeits the efficiency advantage of independent supplies and increases power dissipation in the pass device compared to using a higher-voltage BIAS rail.
How does the BYPASS pin affect startup behavior?
The BYPASS pin connects to a 1nF capacitor that controls the 280µs internal soft-start ramp. During faults (UVLO, thermal shutdown, or EN low), the BYPASS node is held to GND, halting soft-start. This prevents uncontrolled inrush into large output capacitors and ensures monotonic VOUT rise during valid startup.
What is the maximum output voltage achievable at 3A load current?
At 3A, the maximum output voltage is limited to 2.5V when BIAS = 5.0V (VOUT ≤ BIAS − 2.5V). For 3.3V output, the maximum load current drops to 2.5A per datasheet specifications. This trade-off arises from pass device RDS(on) and thermal constraints under high VIN−VOUT conditions.
Is MP2040DQ-LF-P compatible with 1µF ceramic output capacitors across temperature?
Yes - the MP2040DQ-LF-P is explicitly characterized and guaranteed stable with ≥1µF ceramic capacitors (ultra-low ESR) over the full operating temperature range (−40°C to +85°C), eliminating need for tantalum or aluminum electrolytic alternatives and reducing footprint and cost.
How is power-good assertion verified during design-in?
PGOOD asserts high when VOUT exceeds 90% of its final regulated value (e.g., >1.08V for 1.2V output), with 440mV FB threshold and 80µs delay. To verify, monitor PGOOD with oscilloscope while stepping load; ensure pull-up resistor (100kΩ to BIAS) provides sufficient drive and that undershoot does not trigger false low pulses.
Does MP2040DQ-LF-P support adjustable current limiting?
No - current limit is fixed at 3.6A (typical) and not user-adjustable. It is internally trimmed and guaranteed over process and temperature. External current sensing or foldback is required for programmable or reduced current limits.
MP2040DQ-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 3.3V
- Voltage Dropout (Max):
- 0.15V @ 3A (Typ)
- Current - Output:
- 3A
- Current - Quiescent (Iq):
- 3.5 mA
- Current - Supply (Max):
- -
- PSRR:
- 40dB (100kHz)
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Current, Over Temperature, Soft Start
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP2040DQ-LF-P FAQ
1.How can I place an order for MP2040DQ-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2040DQ-LF-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 MP2040DQ-LF-P reliable?
The price and inventory of MP2040DQ-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2040DQ-LF-P is usually 5 days.
3.What payment methods are accepted for MP2040DQ-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2040DQ-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2040DQ-LF-P?
MP2040DQ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2040DQ-LF-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 MP2040DQ-LF-P?
For technical support, including MP2040DQ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2040DQ-LF-P requirements.
6.How does Aetrix verify that MP2040DQ-LF-P is sourced from the original manufacturer or authorized distributors?
All MP2040DQ-LF-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 MP2040DQ-LF-P meets industry standards.
7.What is the process for return or replacement of MP2040DQ-LF-P?
All MP2040DQ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2040DQ-LF-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 MP2040DQ-LF-P part is unused and in its original packaging.
Return procedure for MP2040DQ-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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