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Monolithic Power Systems Inc. MP20042DG-SJ-LF-P
- Part No.:
- MP20042DG-SJ-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-TFDFN Exposed Pad
- Datasheet:
-
MP20042DG-SJ-LF-P.pdf
- Description:
- IC REG LINEAR 2.5V/3.3V 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,187
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Product details
Overview
MP20042DG-SJ-LF-P from Monolithic Power Systems is a dual-channel, low-noise, high-PSRR linear regulator with fixed 3.3V and 2.5V outputs, ±1% accuracy, 72dB PSRR at 1kHz, 11μVRMS output noise, and 200mA per channel capability-designed for powering RF and analog circuitry in battery-powered wireless LAN modules.
For engineers reviewing the MP20042DG-SJ-LF-P datasheet, MP20042DG-SJ-LF-P pinout, MP20042DG-SJ-LF-P application, or MP20042DG-SJ-LF-P equivalent, key selection criteria include dual independent enable control, ultra-low quiescent current (114μA), fast load transient response with 2.2μF ceramic output capacitors, and thermal shutdown at 140°C with 10°C hysteresis.
Technical Context
The MP20042DG-SJ-LF-P integrates two independent PMOS-based LDOs with separate EN1/EN2 inputs, enabling selective channel shutdown to minimize system standby current. Each regulator maintains regulation down to 110mV dropout at 100mA and supports input voltages from 2.5V to 6.0V.
Its architecture delivers channel-to-channel isolation >150dB at 100Hz and features internal current limiting (450mA per channel) and thermal protection with automatic recovery. The device operates across –40°C to +85°C and targets space-constrained, noise-sensitive applications requiring stable dual-rail biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V (Channel 1), 2.5V (Channel 2); factory-trimmed, ±1% accuracy over load/temperature ensures stable reference for ADCs and RF ICs. |
| Max Output Current | 200mA per channel; sufficient to power Wi-Fi transceivers, microcontroller cores, and sensor signal chains without external boost. |
| PSRR @ 1kHz | 72dB; suppresses switching noise from adjacent DC-DC converters, critical for clean analog supply rails. |
| Output Noise | 11μVRMS (10Hz–100kHz); enables use in low-phase-noise VCOs and precision op-amp front-ends. |
| Dropout Voltage | 110mV @ 100mA; allows operation from single-cell Li-ion (3.0V min) while maintaining regulation on both rails. |
| Quiescent Current | 114μA (both channels active); extends battery life in always-on IoT sensors and portable medical devices. |
| Shutdown Current | 0.03–1μA (both EN pins low); meets ultra-low-power requirements for sleep-mode operation in handheld equipment. |
Pinout & Package
MP20042DG-SJ-LF-P uses a thermally enhanced 2mm × 2mm QFN8 package with exposed thermal pad (JEDEC MO-229 VCCD-3 compliant). Pin 4 is common GND; Pin 2 is shared VIN; Pins 1 and 8 are isolated VOUT1 and VOUT2; Pins 3 and 5 are independent EN1 and EN2; Pins 6 and 7 are no-connect (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT1 (Pin 1) | Channel 1 regulated output | Delivers fixed 3.3V to I/O peripherals or digital subsystems; requires local 2.2μF ceramic capacitor for stability. |
| VIN (Pin 2) | Shared input supply | Accepts 2.5V–6.0V; must be decoupled with ≥0.47μF ceramic capacitor close to pin to suppress line transients. |
| EN1 (Pin 3) | Channel 1 enable input | Active-high logic control (VIH = 1.6V min); ties to system MCU GPIO for dynamic rail management. |
| GND (Pin 4) | Common ground reference | Must connect to large PCB copper pour or ground plane to ensure thermal dissipation and low-noise return path. |
| EN2 (Pin 5) | Channel 2 enable input | Independent active-high control (VIL = 0.45V max); enables staggered power-up sequencing for analog subsystems. |
| NC (Pins 6, 7) | No connection | Not internally bonded; must remain unconnected and unpopulated on PCB layout. |
| VOUT2 (Pin 8) | Channel 2 regulated output | Delivers fixed 2.5V to RF front-end or precision analog circuits; shares same stability requirements as VOUT1. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | EN1/EN2 allow per-rail power gating-enables dynamic voltage scaling and reduces system idle current by >99.9%. |
| Ultra-low output noise | 11μVRMS (10Hz–100kHz) eliminates need for post-regulation filtering in sensitive RF/analog stages. |
| High PSRR with minimal capacitance | 72dB at 1kHz using only 2.2μF ceramic output caps-reduces BOM count and board area vs. legacy LDOs requiring 10μF+. |
| Thermal protection with hysteresis | Shuts down at 140°C and auto-recovers at 130°C-prevents latch-up during sustained overload without external supervision. |
| Low dropout with PMOS pass element | 110mV dropout at 100mA enables efficient operation from aging batteries or low-headroom intermediate rails. |
Applications
| Wireless LAN Modules | Portable Medical Sensors |
|---|---|
|
Use Scenario: Dual-rail power for IEEE 802.11n transceiver ICs requiring clean 3.3V I/O and low-noise 2.5V RF bias. IC Role / Device Role / Timing Role: Primary analog/digital LDO pair supplying VDD_IO and VDD_RF rails with independent enable sequencing. Use Value: 72dB PSRR rejects noise from Wi-Fi PA switching; 11μVRMS noise prevents EVM degradation in 2.4GHz transmit paths. |
Use Scenario: Battery-powered ECG patch with real-time signal acquisition and Bluetooth LE transmission. IC Role / Device Role / Timing Role: Dual LDO delivering stable 3.3V to MCU/Bluetooth SoC and 2.5V to instrumentation amplifier/ADC front-end. Use Value: 114μA quiescent current extends 2-week battery life; independent EN control powers analog chain only during sampling bursts. |
| Industrial Handheld Scanners | Laptop Subsystem Power |
|
Use Scenario: Rugged barcode scanner with laser diode driver, CMOS image sensor, and BLE radio-all powered from single Li-ion cell. IC Role / Device Role / Timing Role: Dual LDO providing isolated 3.3V (sensor interface) and 2.5V (laser driver bias) with fast load transient response. Use Value: 110mV dropout sustains regulation down to 3.0V battery voltage; <10mV load transient spike preserves image sensor SNR. |
Use Scenario: Secondary power rail for embedded controller (EC) and keyboard backlight driver in thin-and-light notebooks. IC Role / Device Role / Timing Role: Compact dual LDO replacing discrete regulators to reduce footprint and improve thermal margin on dense motherboard layouts. Use Value: 2mm × 2mm QFN8 saves >60% board area vs. SOIC-8 alternatives; exposed thermal pad lowers θJA to 80°C/W for reliable 200mA operation. |
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 | Fixed 3.3V/2.5V outputs, but only 150mA per channel; 65dB PSRR at 1kHz; 25μVRMS noise. | Lacks independent EN pins-uses single enable for both channels; no thermal hysteresis. | Select when lower cost and reduced feature set are acceptable; avoid in noise-critical RF designs. |
| Ricoh RP111N332B-TR-F | 3.3V/2.5V outputs, 200mA/channel, but 55dB PSRR at 1kHz; 20μVRMS noise; 250mV dropout @ 100mA. | Single EN pin; no channel isolation spec; thermal shutdown at 150°C (no hysteresis). | Use where PSRR >65dB is not required and board space permits larger 3mm × 3mm DFN package. |
Compared with XC6223D332MR-G and RP111N332B-TR-F, MP20042DG-SJ-LF-P delivers superior noise performance (11 vs. ≥20μVRMS), higher PSRR (72dB vs. ≤65dB), and true per-channel enable control-making it optimal for co-located RF/analog systems demanding rail independence and spectral purity.
Availability
MP20042DG-SJ-LF-P is available at Aetrix Electronics and suitable for wireless LAN modules, portable medical sensors, and industrial handheld scanners requiring stable component supply, consistent top-marking (2M), and RoHS-compliant tape-and-reel packaging.
Supply support for MP20042DG-SJ-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 analog and power ICs, with design centers in the US, China, and Taiwan.
The MP20042 belongs to MPS's low-noise, micropower LDO product line-engineered specifically for battery-powered wireless and portable electronics where PSRR, noise, and quiescent current are critical system-level constraints.
FAQ
What are the exact output voltages of MP20042DG-SJ-LF-P?
The MP20042DG-SJ-LF-P provides factory-trimmed fixed outputs: Channel 1 delivers 3.3V ±1%, and Channel 2 delivers 2.5V ±1%. These values are confirmed in the official MPS ordering guide (Rev. 0.9, p.2) and correspond to top-marking code "2M".
Can MP20042DG-SJ-LF-P operate from a 2.7V input?
Yes-its specified input range is 2.5V to 6.0V. At 2.7V input, the 2.5V output remains regulated with 200mV headroom, satisfying the 110mV dropout requirement at 100mA load. Full 200mA capability requires ≥2.6V input for the 2.5V rail.
Is an external Schottky diode required for reverse current protection?
Yes-due to the inherent body diode in the internal PMOS pass transistor, an external Schottky diode (e.g., BAT54) must be placed between VIN and each VOUT to prevent reverse current flow when VOUT > VIN, as specified in the application note (p.7, Figure 4).
What is the thermal resistance (θJA) of the QFN8 package?
The 2mm × 2mm QFN8 package has θJA = 80°C/W when mounted on a standard 4-layer JEDEC test board (JESD51-7), per Absolute Maximum Ratings table (p.3). Layout with exposed pad soldered to ≥1cm² copper improves thermal performance.
Does MP20042DG-SJ-LF-P support output voltage adjustment via external resistors?
No-it is a fixed-output device only. The datasheet confirms all variants (including SJ) have factory-set voltages; no feedback pin or resistor-divider option exists. Adjustable versions require different part numbers (e.g., MP20041 series).
How does channel-to-channel isolation affect system design?
Measured >150dB at 100Hz, this isolation prevents crosstalk between rails-critical when powering noise-sensitive analog circuits (e.g., VCOs) on VOUT2 while digital loads switch on VOUT1, avoiding spurious tones in RF output spectra.
What is the minimum output capacitor value for stable operation?
A minimum 0.47μF ceramic capacitor is required per output, with ESR <1.2Ω. The typical application uses 2.2μF (p.2), and larger values (up to 10μF) improve load transient response without compromising stability.
MP20042DG-SJ-LF-P 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-P FAQ
1.How can I place an order for MP20042DG-SJ-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP20042DG-SJ-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 MP20042DG-SJ-LF-P reliable?
The price and inventory of MP20042DG-SJ-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 MP20042DG-SJ-LF-P is usually 5 days.
3.What payment methods are accepted for MP20042DG-SJ-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP20042DG-SJ-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP20042DG-SJ-LF-P?
MP20042DG-SJ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP20042DG-SJ-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 MP20042DG-SJ-LF-P?
For technical support, including MP20042DG-SJ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP20042DG-SJ-LF-P requirements.
6.How does Aetrix verify that MP20042DG-SJ-LF-P is sourced from the original manufacturer or authorized distributors?
All MP20042DG-SJ-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 MP20042DG-SJ-LF-P meets industry standards.
7.What is the process for return or replacement of MP20042DG-SJ-LF-P?
All MP20042DG-SJ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP20042DG-SJ-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 MP20042DG-SJ-LF-P part is unused and in its original packaging.
Return procedure for MP20042DG-SJ-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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