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Monolithic Power Systems Inc. MPQ20051DQ-LF-Z
- Part No.:
- MPQ20051DQ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
MPQ20051DQ-LF-Z.pdf
- Description:
- IC REG LINEAR POS ADJ 1A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,542
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Product details
Overview
MPQ20051DQ-LF-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, low-noise, high-PSRR 1A linear regulator with 140mV dropout at 1A, 130μA ground current, and externally adjustable 0.8V–5V output across 2.5V–5.5V input. It employs an internal PMOS pass element and integrates thermal shutdown, short-circuit protection, and logic-controlled enable for automotive power rails and battery-powered industrial systems.
For engineers reviewing the MPQ20051DQ-LF-Z datasheet, MPQ20051DQ-LF-Z pinout, MPQ20051DQ-LF-Z application, or MPQ20051DQ-LF-Z equivalent, key selection criteria include its AEC-Q100 qualification, 13μVRMS output noise (10Hz–100kHz), 63dB PSRR at 1kHz, ceramic-capacitor stability, and QFN-8 (3mm×3mm) package with exposed thermal pad.
Technical Context
The MPQ20051DQ-LF-Z uses a PMOS-based LDO architecture with voltage-mode error amplifier control and integrated UVLO (1.95V rising threshold, 160mV hysteresis). Its feedback loop references a precision 0.8V bandgap, enabling accurate output regulation across -40°C to +125°C junction temperature.
Thermal protection activates at 150°C with 20°C hysteresis, and current limiting is implemented via gate-voltage control of the PMOS pass device-guaranteeing 1.2A–2.3A short-circuit current and 1.4A–3.0A in-regulation limit depending on VIN and VOUT conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A continuous - supports high-current digital loads like SoC cores and RF transceivers without external boost stages. |
| Dropout Voltage | 140mV at 1A - enables stable 1.1V output from 2.5V input, critical for ultra-low-voltage battery operation. |
| Ground Current | 130μA at light load - extends battery life in always-on automotive sensors and telematics modules. |
| Output Noise | 13μVRMS (10Hz–100kHz) at 1.1V - meets stringent noise requirements for RF front-end biasing and ADC reference supplies. |
| PSRR | 63dB at 1kHz - suppresses switching noise from adjacent DC/DC converters in mixed-signal automotive ECUs. |
| Enable Threshold | EN high ≥1.5V, low ≤0.4V - compatible with 1.8V/3.3V logic interfaces and supports clean power sequencing. |
| Thermal Shutdown | 150°C with 20°C hysteresis - provides autonomous recovery after overload without system-level intervention. |
Pinout & Package
MPQ20051DQ-LF-Z is housed in a thermally enhanced 3mm × 3mm QFN-8 package with exposed thermal pad (connected to GND). The package complies with MSL Level 1 and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 - VOUT | Regulator output node | High-current output path; requires 4.7μF ceramic capacitor directly to GND; pins must be shorted externally. |
| 3 - FB | Feedback input | Senses output via resistor divider; 0.8V reference enables precise 0.8V–5V programmability; input bias <0.3μA minimizes divider error. |
| 4 - GND | Power and signal ground | Exposed thermal pad - must be soldered to large PCB ground plane for θJA = 50°C/W and reliable 1A operation. |
| 5 - EN | Logic-enable control | Active-high digital input; 1.5V min turn-on threshold ensures compatibility with 1.8V I/O domains; floating prohibited. |
| 6 - NC | No connection | Internally unconnected; must remain open - no routing or copper fill allowed. |
| 7, 8 - VIN | Input supply rail | 2.5V–5.5V input path; requires 2.2μF ceramic bypass; pins internally connected but must be externally joined for low-impedance routing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures (-40°C to +125°C) and stress testing per Rev H, enabling use in engine bay and ADAS modules. |
| Stable with ceramic capacitors only | Eliminates need for tantalum or aluminum electrolytics - reduces BOM cost, size, and failure risk in space-constrained modules. |
| Low 130μA quiescent current | Enables >1-year battery runtime in always-on vehicle tracking units powered by 200mAh Li-ion cells. |
| 63dB PSRR at 1kHz | Attenuates ripple from upstream buck converters driving infotainment SoCs, preventing audible noise and data corruption. |
| Fast 45–100μs startup time | Meets automotive cold-cranking timing requirements where power rails must stabilize before MCU boot sequence begins. |
Applications
| Automotive Infotainment Core Supply | Industrial IoT Sensor Node Power |
|---|---|
Use Scenario: Powers ARM Cortex-A72 core and DDR3L memory in head-unit SoC under stop-start engine conditions. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering 1.1V @ 1A with <100mV dropout margin during 6.5V battery dips. Use Value: 13μVRMS noise prevents bit errors in DDR3L eye diagrams; 63dB PSRR rejects alternator ripple at 1kHz. | Use Scenario: Supplies ultra-low-power wireless sensor hub (BLE + environmental sensors) in predictive maintenance gateway. IC Role / Device Role / Timing Role: Always-on 3.3V LDO with shutdown control, enabling <1μA system sleep current when BLE radio is inactive. Use Value: 130μA ground current extends 2xAA alkaline battery life to 3+ years; AEC-Q100 qualification ensures field reliability. |
| Automotive Camera Module Bias Rail | Medical Portable Diagnostic Device |
Use Scenario: Provides clean 2.8V bias to CMOS image sensor and ISP in rear-view camera ECU operating at -40°C to +105°C. IC Role / Device Role / Timing Role: Low-noise analog supply isolated from noisy motor driver domains; enabled only during video capture. Use Value: 140mV dropout allows operation down to 3.0V input during cranking; 13μVRMS prevents fixed-pattern noise in raw sensor output. | Use Scenario: Delivers regulated 1.8V to ADC and microcontroller in handheld ultrasound probe requiring FDA Class II compliance. IC Role / Device Role / Timing Role: Safety-critical analog supply with thermal shutdown and short-circuit protection to prevent overheating in sealed enclosure. Use Value: 150°C thermal cutoff and 2.3A short-circuit limit meet IEC 60601-1 fault tolerance requirements; RoHS/LF compliance supports global medical certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS7A8300RGRT | Lower noise (4.7μVRMS), higher PSRR (75dB @1kHz), but 300μA IQ and non-AEC-Q100 rated. | Preferred for lab-grade instrumentation; unsuitable for automotive production due to lack of qualification. | Select only for non-automotive high-precision analog systems where qualification is not required. |
| ON Semi NCP1117ST50T3G | Fixed 5.0V output, 1.2A rating, 1.2V dropout, no enable pin, no AEC-Q100 grade. | Used in legacy industrial controls; lacks programmability, low-noise performance, and automotive reliability validation. | Consider only for cost-sensitive, non-automotive, fixed-output applications where PSRR and noise are secondary. |
Compared with TPS7A8300RGRT and NCP1117ST50T3G, MPQ20051DQ-LF-Z uniquely balances AEC-Q100 Grade 1 qualification, 13μVRMS noise, 140mV dropout, and 130μA quiescent current - making it the only viable choice for next-generation automotive LDO applications demanding both reliability and signal integrity.
Availability
MPQ20051DQ-LF-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial IoT sensor nodes, and medical portable diagnostic devices requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MPQ20051DQ-LF-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 MPQ20051 belongs to MPS's automotive-grade LDO portfolio, engineered specifically for noise-sensitive, safety-critical power rails in ADAS, infotainment, and body electronics - emphasizing AEC-Q100 compliance, thermal robustness, and low-EMI operation.
FAQ
What is the minimum input voltage required for MPQ20051DQ-LF-Z to regulate a 1.1V output?
The MPQ20051DQ-LF-Z requires a minimum input voltage of 1.24V (1.1V + 140mV dropout) to maintain regulation. However, its absolute minimum specified input is 2.5V per datasheet - meaning 1.1V output operation is only valid when VIN ≥2.5V, ensuring sufficient headroom for transient response and PSRR performance.
Can MPQ20051DQ-LF-Z be used without an external feedback resistor divider?
No - the MPQ20051DQ-LF-Z has no fixed-output variants and requires an external R1/R2 resistor divider connected to the FB pin to set the output voltage. The feedback threshold is fixed at 0.8V, so omitting the divider results in undefined or non-regulated output behavior.
Is the exposed thermal pad on the QFN-8 package electrically connected internally?
Yes - the exposed pad is internally connected to GND and must be soldered to a PCB ground plane. This connection is mandatory for thermal performance (θJA = 50°C/W) and electrical stability; leaving it unconnected degrades thermal dissipation and may cause premature thermal shutdown at <1A load.
Does MPQ20051DQ-LF-Z support reverse voltage protection on the output?
No - the internal PMOS pass device includes a body diode that conducts from OUT to IN if VOUT > VIN. In backup-battery or hot-swap scenarios, this can cause destructive reverse current. An external Schottky diode between VIN and OUT is required to block reverse conduction.
What is the maximum allowable output capacitance for MPQ20051DQ-LF-Z?
The datasheet specifies stability with ≥4.7μF ceramic output capacitance and does not define an upper limit. Larger values (e.g., 10–22μF) improve load-transient response and reduce output ripple but increase startup time and inrush current - design trade-offs must be validated per application using the recommended layout and thermal derating curves.
How does the EN pin behave during power-up when tied directly to VIN?
When EN is tied to VIN, the regulator enables as soon as VIN rises above 1.5V (EN threshold). Since VIN itself ramps with input supply, this provides simple, self-synchronizing enable timing - but note that UVLO (1.95V) activates before EN threshold, so the device remains disabled until VIN exceeds both UVLO and EN thresholds, ensuring clean start-up.
MPQ20051DQ-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.28V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 200 µA
- Current - Supply (Max):
- 700 µA
- PSRR:
- 65dB ~ 33dB (100Hz ~ 1MHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-QFN (3x3)
MPQ20051DQ-LF-Z FAQ
1.How can I place an order for MPQ20051DQ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ20051DQ-LF-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 MPQ20051DQ-LF-Z reliable?
The price and inventory of MPQ20051DQ-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ20051DQ-LF-Z is usually 5 days.
3.What payment methods are accepted for MPQ20051DQ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ20051DQ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ20051DQ-LF-Z?
MPQ20051DQ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ20051DQ-LF-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 MPQ20051DQ-LF-Z?
For technical support, including MPQ20051DQ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ20051DQ-LF-Z requirements.
6.How does Aetrix verify that MPQ20051DQ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MPQ20051DQ-LF-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 MPQ20051DQ-LF-Z meets industry standards.
7.What is the process for return or replacement of MPQ20051DQ-LF-Z?
All MPQ20051DQ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ20051DQ-LF-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 MPQ20051DQ-LF-Z part is unused and in its original packaging.
Return procedure for MPQ20051DQ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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