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Monolithic Power Systems Inc. MP20042DG-PN-LF-Z
- Part No.:
- MP20042DG-PN-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-TFDFN Exposed Pad
- Datasheet:
-
MP20042DG-PN-LF-Z.pdf
- Description:
- IC REG LINEAR 2.85V/3V 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,069
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Product details
Overview
MP20042DG-PN-LF-Z from Monolithic Power Systems is a dual-channel, low-noise, high-PSRR linear regulator with fixed 3.0V and 2.85V outputs, 1% accuracy, 200mA per channel, 11μVRMS output noise, and 72dB PSRR at 1kHz-designed for power-sensitive RF and portable computing subsystems.
For engineers reviewing the MP20042DG-PN-LF-Z datasheet, MP20042DG-PN-LF-Z pinout, MP20042DG-PN-LF-Z application, or MP20042DG-PN-LF-Z equivalent, key selection criteria include dual independent enable control, ultra-low quiescent current (114μA), fast transient response with 2.2μF ceramic output capacitors, and thermal shutdown at 140°C.
Technical Context
The MP20042DG-PN-LF-Z integrates two independent PMOS-based LDOs with separate EN1/EN2 inputs, enabling asynchronous channel control and near-zero shutdown current (≤1μA). Each regulator maintains regulation down to 110mV dropout at 100mA load and supports input voltages from 2.5V to 6.0V.
Its architecture delivers channel-to-channel isolation >150dB across 10Hz–1MHz, suppresses supply ripple via 72dB PSRR at 1kHz, and ensures stability with 0.47–10μF ceramic output capacitors (ESR <1.2Ω), eliminating need for external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 3.0V (Ch1) and 2.85V (Ch2), factory-trimmed to ±1% accuracy over temperature and load |
| Max Output Current | 200mA per channel-supports simultaneous full-load operation without thermal derating in QFN8 package |
| PSRR @ 1kHz | 72dB-rejects switching noise from adjacent DC/DC converters in mixed-signal SoC power domains |
| Output Noise | 11μVRMS (10Hz–100kHz)-meets low-jitter clock generator and RF front-end biasing requirements |
| Dropout Voltage | 110mV @ 100mA-enables 3.3V rail powering 3.0V/2.85V logic while preserving headroom for battery discharge |
| Quiescent Current | 114μA (both channels active), ≤1μA (both disabled)-extends battery life in always-on sensor nodes |
| Thermal Shutdown | 140°C activation with 10°C hysteresis-prevents permanent damage during sustained overload or poor PCB heatsinking |
Pinout & Package
MP20042DG-PN-LF-Z uses a thermally enhanced 2mm × 2mm QFN8 package with exposed thermal pad (JEDEC MO-229 VCCD-3 compliant). Pin 4 is common GND; pins 6 and 7 are no-connect (NC); pin 1 = VOUT1 (3.0V), pin 8 = VOUT2 (2.85V), pin 2 = VIN, pins 3/5 = EN1/EN2 (active-high).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT1 | 3.0V regulated output-requires local 2.2μF ceramic capacitor; feeds core logic or I/O rails |
| 2 | VIN | Main input (2.5–6.0V); shared by both LDOs; must be bypassed with ≥0.47μF ceramic capacitor |
| 3 | EN1 | Active-high enable for 3.0V channel; ties to VIN for always-on operation; must not float |
| 4 | GND | Common ground reference and thermal path-must connect to large copper pour for θJA = 80°C/W |
| 5 | EN2 | Active-high enable for 2.85V channel; independent control enables staggered power-up sequencing |
| 6, 7 | NC | No internal connection-leave unconnected; no routing or solder mask required |
| 8 | VOUT2 | 2.85V regulated output-optimized for low-noise analog circuitry (e.g., ADC reference, RF bias) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | EN1/EN2 allow precise power sequencing-e.g., enable 2.85V analog rail before 3.0V digital core |
| Ultra-low noise output | 11μVRMS enables clean power for 12-bit+ SAR ADCs and low-phase-noise VCOs without post-regulation filtering |
| High PSRR at 1kHz | 72dB rejection of 1MHz switching harmonics from buck converters-reduces need for ferrite beads or LC filters |
| Fast transient response | Stable with 2.2μF ceramic output caps; <20mV undershoot on 0→80mA load step-minimizes voltage droop in burst-mode processors |
| Thermal + current protection | Integrated 140°C shutdown and per-channel current limiting (450mA trip) prevent field failures under short-circuit conditions |
Applications
| Wireless LAN Baseband | Portable Medical Sensors |
|---|---|
Use Scenario: Powering WLAN baseband ICs (e.g., Wi-Fi SoCs) requiring isolated 3.0V digital and 2.85V analog supplies. IC Role / Device Role / Timing Role: Dual LDO provides rail separation to prevent digital switching noise from coupling into sensitive RF receive paths. Use Value: 150dB channel isolation and 72dB PSRR eliminate need for discrete filtering, reducing BOM count and PCB area. | Use Scenario: Battery-powered ECG or pulse oximeter modules needing ultra-low-noise bias for analog front-end amplifiers. IC Role / Device Role / Timing Role: Supplies precision 2.85V reference and 3.0V microcontroller core from single-cell Li-ion (3.0–4.2V). Use Value: 11μVRMS noise ensures <0.01% gain error in 24-bit delta-sigma ADCs; 114μA quiescent current extends runtime >72 hours. |
| Laptop Subsystem Power | Industrial Handheld Terminals |
Use Scenario: Power management for laptop touchpad controllers and embedded security chips operating from 3.3V system rail. IC Role / Device Role / Timing Role: Generates tightly regulated 3.0V/2.85V from noisy 3.3V DC/DC output; EN pins synchronize with host suspend/resume. Use Value: 1% output accuracy maintains timing margin for I²C/SPI peripherals; 110mV dropout preserves operation down to 3.15V input. | Use Scenario: Ruggedized handheld terminals with barcode scanners and Bluetooth radios powered by 3.7V Li-ion batteries. IC Role / Device Role / Timing Role: Dual LDO powers scanner laser driver (3.0V) and BLE SoC RF section (2.85V) with independent enable for duty-cycle control. Use Value: Independent EN1/EN2 reduces average system current by 114μA during idle; thermal shutdown prevents overheating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6223D302MR-G | Single-channel only; 3.0V fixed output; 150mA max; 45dB PSRR @ 1kHz; 25μVRMS noise | Cannot replace dual-rail functionality; requires two devices for same function; larger board footprint | Select only if single-rail design suffices and lower PSRR/noise specs are acceptable |
| Ricoh RP111Q282D-TR-F | Dual-channel with 2.8V/2.8V outputs; 200mA/channel; 65dB PSRR @ 1kHz; 15μVRMS noise; no independent EN pins | Fixed identical outputs limit flexibility; shared enable prevents sequencing; higher noise degrades RF performance | Choose only when matched dual 2.8V rails are sufficient and sequencing is unnecessary |
Compared with XC6223D302MR-G and RP111Q282D-TR-F, MP20042DG-PN-LF-Z uniquely delivers asymmetric 3.0V/2.85V outputs, independent enable control, superior 72dB PSRR, and industry-leading 11μVRMS noise-making it optimal for space-constrained, noise-sensitive dual-rail systems.
Availability
MP20042DG-PN-LF-Z is available at Aetrix Electronics and suitable for wireless LAN baseband, portable medical sensors, and industrial handheld terminals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MP20042DG-PN-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 expertise in DC/DC converters, LDOs, motor drivers, and LED drivers.
The MP20042 belongs to MPS's ultra-low-noise LDO product line, engineered specifically for battery-powered RF and portable computing applications demanding high PSRR, tight output accuracy, and minimal quiescent current.
FAQ
What are the exact output voltages for MP20042DG-PN-LF-Z?
The MP20042DG-PN-LF-Z is factory-configured with fixed 3.0V on Channel 1 (VOUT1) and 2.85V on Channel 2 (VOUT2), trimmed to ±1% accuracy over -40°C to +85°C and full load range. These values are non-adjustable and defined by internal resistor networks per the ordering guide code "PN".
Can MP20042DG-PN-LF-Z operate from a 2.5V input with 3.0V output?
No-operation requires minimum input-output differential voltage. At 3.0V output, the 110mV dropout specification means VIN must be ≥3.11V to sustain 100mA load. For 2.5V input, only outputs ≤2.39V (e.g., 2.2V or 2.0V variants) are viable; this part's 3.0V/2.85V outputs require VIN ≥3.11V.
Is an external Schottky diode required for reverse current protection?
Yes-if VOUT exceeds VIN by >0.3V (e.g., during hot-swap or battery backup scenarios), the internal PMOS body diode conducts. An external Schottky (e.g., BAT54) between VIN and VOUT clamps reverse voltage to ~0.3V, preventing unintended current flow and potential system malfunction.
What is the recommended output capacitor for optimal transient response?
A 2.2μF X5R/X7R ceramic capacitor with ESR <1.2Ω is validated for stable operation and minimal load-step undershoot (<20mV for 0→80mA). Larger values (up to 10μF) further reduce noise and improve transient recovery but increase board area and cost.
How does the thermal shutdown behave during continuous overload?
At junction temperatures ≥140°C, the device disables both LDOs and enters thermal shutdown. After cooling by ≥10°C (to ≤130°C), automatic restart occurs. This cycle repeats until fault condition clears-protecting against permanent damage but requiring thermal design (e.g., 2-layer 1oz Cu + thermal pad) to avoid sustained cycling.
Are pins 6 and 7 electrically connected internally?
No-pins 6 and 7 are designated NC (no-connect) in the official datasheet and functional block diagram. They have no internal bonding or circuit connection. PCB layout should leave them unconnected; no trace routing, solder mask opening, or thermal relief is required.
Does MP20042DG-PN-LF-Z support power sequencing between channels?
Yes-EN1 and EN2 are fully independent active-high enables. Driving EN1 before EN2 establishes precise 3.0V-first sequencing for digital cores, while delaying EN2 enables controlled ramp-up of analog rails-critical for avoiding latch-up in mixed-signal ASICs.
MP20042DG-PN-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-TFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.85V, 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 200mA (Typ), 0.25V @ 200mA (Typ)
- Current - Output:
- 200mA, 200mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 72dB ~ 47dB (100Hz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-QFN (2x2)
MP20042DG-PN-LF-Z FAQ
1.How can I place an order for MP20042DG-PN-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP20042DG-PN-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 MP20042DG-PN-LF-Z reliable?
The price and inventory of MP20042DG-PN-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 MP20042DG-PN-LF-Z is usually 5 days.
3.What payment methods are accepted for MP20042DG-PN-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP20042DG-PN-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP20042DG-PN-LF-Z?
MP20042DG-PN-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP20042DG-PN-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 MP20042DG-PN-LF-Z?
For technical support, including MP20042DG-PN-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP20042DG-PN-LF-Z requirements.
6.How does Aetrix verify that MP20042DG-PN-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP20042DG-PN-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 MP20042DG-PN-LF-Z meets industry standards.
7.What is the process for return or replacement of MP20042DG-PN-LF-Z?
All MP20042DG-PN-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP20042DG-PN-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 MP20042DG-PN-LF-Z part is unused and in its original packaging.
Return procedure for MP20042DG-PN-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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