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Monolithic Power Systems Inc. MP20042DG-SJ-LF-Z
- Part No.:
- MP20042DG-SJ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-TFDFN Exposed Pad
- Datasheet:
-
MP20042DG-SJ-LF-Z.pdf
- Description:
- IC REG LINEAR 2.5V/3.3V 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,567
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Product details
Overview
MP20042DG-SJ-LF-Z from Monolithic Power Systems is a dual-channel, low-noise, high-PSRR linear regulator with fixed 3.3V and 2.5V outputs, 1% accuracy, 200mA per channel, 72dB PSRR at 1kHz, and 11μVRMS output noise - designed for powering sensitive analog and RF circuitry in portable electronics.
For engineers reviewing the MP20042DG-SJ-LF-Z datasheet, MP20042DG-SJ-LF-Z pinout, MP20042DG-SJ-LF-Z application, or MP20042DG-SJ-LF-Z equivalent, key selection criteria include dual independent enable control (EN1/EN2), ultra-low quiescent current (114μA), fast transient response with small ceramic capacitors, and thermal shutdown protection for battery-powered systems.
Technical Context
The MP20042DG-SJ-LF-Z integrates two independent PMOS-based LDOs with separate enable inputs, enabling selective power gating of each rail. Each channel delivers regulated 3.3V and 2.5V outputs with <1% initial accuracy and maintains regulation down to 110mV dropout at 100mA load.
Its architecture achieves 72dB PSRR at 1kHz and 11μVRMS integrated noise (10Hz–100kHz) via internal compensation optimized for 0.47–10μF ceramic output capacitors. Thermal shutdown activates at 140°C with 10°C hysteresis, and current limiting caps output at 450mA per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage (Ch1/Ch2) | 3.3V / 2.5V - Fixed, factory-trimmed outputs requiring no external resistors. |
| Output Accuracy | ±1% - Ensures stable supply for precision analog circuits and core logic rails. |
| Max Output Current | 200mA per channel - Supports dual-rail microcontrollers, RF transceivers, and sensor interfaces. |
| PSRR @ 1kHz | 72dB - Rejects switching noise from adjacent DC/DC converters in mixed-signal PCBs. |
| Output Noise | 11μVRMS (10Hz–100kHz) - Low enough for ADC reference supplies and RF VCOs. |
| Quiescent Current | 114μA (both channels active) - Extends battery life in always-on subsystems. |
| Dropout Voltage | 110mV @ 100mA - Enables operation from single-cell Li-ion (3.0V min) with margin. |
Pinout & Package
MP20042DG-SJ-LF-Z is housed in a thermally enhanced 2mm × 2mm QFN-8 package with exposed thermal pad (JEDEC MO-229 VCCD-3 compliant). The package supports high-density layout and efficient heat dissipation when soldered to a PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT1 | Channel 1 regulated output | Delivers fixed 3.3V; requires local 0.47–10μF ceramic capacitor for stability. |
| 2 - VIN | Common input supply | Accepts 2.5V–6.0V; shared by both LDOs; requires ≥0.47μF input capacitor. |
| 3 - EN1 | Channel 1 enable (active-high) | Logic-controlled ON/OFF of VOUT1; must be tied to VIN or GND - never floated. |
| 4 - GND | Power and signal ground | Common return path; connects to thermal pad for optimal thermal performance. |
| 5 - EN2 | Channel 2 enable (active-high) | Independent control of 2.5V output; enables flexible power sequencing. |
| 6, 7 - NC | No connect | Not internally bonded; leave unconnected and unpopulated on PCB. |
| 8 - VOUT2 | Channel 2 regulated output | Delivers fixed 2.5V; decoupled separately from VOUT1 to minimize crosstalk. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable pins | EN1 and EN2 allow asynchronous power-up/down sequencing for multi-rail SoCs. |
| Ultra-low noise output | 11μVRMS enables clean power for RF front-ends and high-resolution ADCs. |
| High PSRR at audio frequencies | 72dB rejection at 1kHz suppresses noise from buck converter ripple and digital clocks. |
| Thermal + current protection | 140°C shutdown with 10°C hysteresis and 450mA per-channel current limit ensure robustness. |
| Low dropout with PMOS pass element | 110mV dropout at 100mA allows use with aging batteries or low-headroom sources. |
Applications
| Wireless LAN Modules | Portable Medical Sensors |
|---|---|
|
Use Scenario: Powering 2.4GHz/5GHz RF transceivers and baseband processors in compact Wi-Fi modules. IC Role / Device Role / Timing Role: Dual-rail LDO supplying 3.3V for I/O and 2.5V for RF VCO/PLL analog blocks. Use Value: 72dB PSRR prevents switching noise from DC/DC converters from degrading EVM and receiver sensitivity. |
Use Scenario: Regulating power for low-power biosignal amplifiers and 16-bit ADCs in wearable ECG monitors. IC Role / Device Role / Timing Role: Ultra-low-noise 2.5V rail for analog front-end reference and 3.3V rail for microcontroller core. Use Value: 11μVRMS noise ensures <1 LSB error in 16-bit conversion at 1kSPS sampling rate. |
| Industrial Handheld Scanners | Smart IoT Edge Nodes |
|
Use Scenario: Supplying barcode image sensor, laser driver, and ARM Cortex-M MCU in battery-operated scanners. IC Role / Device Role / Timing Role: Independent EN1/EN2 enables dynamic power gating: 3.3V for MCU during idle, 2.5V only during image capture. Use Value: 114μA quiescent current extends 2000mAh Li-ion battery life to >12 months in sleep mode. |
Use Scenario: Powering BLE SoC (3.3V), environmental sensors (2.5V), and secure element in sealed environmental nodes. IC Role / Device Role / Timing Role: Dual LDO replaces discrete regulators, reducing BOM count and PCB area in 12mm × 12mm modules. Use Value: 2mm × 2mm QFN8 footprint saves >40% board space vs. two SOT-23-5 LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6223D332MR-G | 3.3V/2.5V dual, 150mA/channel, 45dB PSRR @ 1kHz, 25μVRMS noise, SOT-25 package | Lowers PSRR and noise performance; suitable only where RF/ADC sensitivity is non-critical | Select when cost is prioritized over noise/PSRR and board space allows larger SOT-25 footprint |
| Richtek RT9013-33PB | Single 3.3V LDO (200mA), no dual output; requires second regulator for 2.5V rail | Increases BOM count, layout complexity, and total solution size | Use only if existing design already uses RT9013 and dual-rail integration is not required |
Compared with XC6223D332MR-G and RT9013-33PB, MP20042DG-SJ-LF-Z uniquely delivers simultaneous 3.3V/2.5V regulation with best-in-class noise (11μVRMS) and PSRR (72dB), enabling higher-performance RF and precision analog subsystems in minimal area.
Availability
MP20042DG-SJ-LF-Z is available at Aetrix Electronics and suitable for wireless LAN modules, portable medical sensors, and industrial handheld scanners requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MP20042DG-SJ-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 low-noise, micropower LDO product line, engineered specifically for battery-powered portable electronics demanding ultra-low quiescent current, high PSRR, and tight output accuracy.
FAQ
What are the exact output voltages of MP20042DG-SJ-LF-Z?
The MP20042DG-SJ-LF-Z provides factory-set outputs of 3.3V on VOUT1 and 2.5V on VOUT2, with ±1% initial accuracy across temperature and load. These are fixed outputs - no external feedback resistors are required or supported.
Can MP20042DG-SJ-LF-Z operate from a single-cell Li-ion battery?
Yes - with a minimum input voltage of 2.5V and 110mV dropout at 100mA, it operates reliably down to ~2.6V input, covering the usable discharge range of a single-cell Li-ion (3.0V–4.2V nominal, down to 2.7V cutoff).
Is an external Schottky diode required for reverse current protection?
Yes - the internal PMOS pass element has a body diode that conducts if VOUT > VIN by >0.3V. An external Schottky diode (e.g., BAT54) between VIN and VOUT is recommended to prevent reverse current in systems with multiple power domains.
What is the maximum allowable power dissipation at 85°C ambient?
Using θJA = 80°C/W and TJ(MAX) = 125°C, maximum continuous power dissipation is (125 − 85)/80 = 0.5W. Derating is required above 25°C ambient; full 200mA per channel is only sustainable with adequate PCB copper area and airflow.
Does MP20042DG-SJ-LF-Z require specific output capacitor ESR?
No - unlike older LDOs, it is optimized for low-ESR ceramic capacitors (≤1.2Ω) in the 0.47–10μF range. Tantalum or aluminum electrolytics are not recommended due to higher ESR and instability risk.
How does the thermal shutdown behave during overload conditions?
When junction temperature exceeds 140°C, the device shuts down both outputs. It remains off until temperature drops by 10°C (to ~130°C), then automatically resumes regulation - providing self-recovering protection without external intervention.
Can EN1 and EN2 be tied together for simultaneous control?
Yes - EN1 and EN2 may be connected to a common logic signal for synchronized enable/disable. However, independent control is supported and recommended for power sequencing in complex SoC systems.
MP20042DG-SJ-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):
- 2.5V, 3.3V
- 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-SJ-LF-Z FAQ
1.How can I place an order for MP20042DG-SJ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP20042DG-SJ-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-SJ-LF-Z reliable?
The price and inventory of MP20042DG-SJ-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-SJ-LF-Z is usually 5 days.
3.What payment methods are accepted for MP20042DG-SJ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP20042DG-SJ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP20042DG-SJ-LF-Z?
MP20042DG-SJ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP20042DG-SJ-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-SJ-LF-Z?
For technical support, including MP20042DG-SJ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP20042DG-SJ-LF-Z requirements.
6.How does Aetrix verify that MP20042DG-SJ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP20042DG-SJ-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-SJ-LF-Z meets industry standards.
7.What is the process for return or replacement of MP20042DG-SJ-LF-Z?
All MP20042DG-SJ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP20042DG-SJ-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-SJ-LF-Z part is unused and in its original packaging.
Return procedure for MP20042DG-SJ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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