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Monolithic Power Systems Inc. MP2104DJ-1.8-LF-P
- Part No.:
- MP2104DJ-1.8-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MP2104DJ-1.8-LF-P.pdf
- Description:
- IC REG BUCK 1.8V 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,170
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Product details
Overview
MP2104DJ-1.8-LF-P from Monolithic Power Systems is a 1.7MHz synchronous step-down DC/DC converter delivering 600mA output current with fixed 1.8V output, operating from 2.5V–6V input, integrated PFET/NFET switches, and 100% duty-cycle capability for low-dropout operation in Li+-powered portable systems.
For engineers reviewing the MP2104DJ-1.8-LF-P datasheet, MP2104DJ-1.8-LF-P pinout, MP2104DJ-1.8-LF-P application, or MP2104DJ-1.8-LF-P equivalent, key selection criteria include fixed-output accuracy (±3% over –40°C to +85°C), TSOT23-5 thermal resistance (θJA = 220°C/W), shutdown current <1μA, and compatibility with 10μH inductors and 4.7μF ceramic input capacitors.
Technical Context
The MP2104DJ-1.8-LF-P implements constant-frequency current-mode PWM control with slope compensation, enabling stable regulation and cycle-by-cycle peak-current limiting. Its internal feedback reference is trimmed to 0.600V ±2%, and the fixed 1.8V output is set via an on-chip resistor divider connected to the OUT pin.
It integrates a 0.44Ω PFET high-side switch and 0.29Ω NFET synchronous rectifier, supporting 100% duty cycle during dropout and reducing external component count. Thermal shutdown triggers at 145°C, and short-circuit protection reduces oscillator frequency and PFET current limit to 0.7–1.35A under fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.7MHz typical; enables compact 10μH inductor and small ceramic capacitors, minimizing board area in space-constrained portable designs. |
| Output Voltage | Fixed 1.8V ±3% (–40°C to +85°C); eliminates external feedback resistors and simplifies layout for core voltage rails in microprocessors and DSPs. |
| Load Current | 600mA continuous; sufficient for single-core ARM Cortex-M processors and low-power FPGAs without thermal derating at TA ≤ +60°C in TSOT23-5. |
| Input Voltage Range | 2.5V to 6V; supports direct regulation from single-cell Li-ion (3.0–4.2V) or dual-cell alkaline (3.0–3.6V) sources without pre-regulation. |
| Shutdown Current | <1μA max; extends battery life in standby modes of smartphones and wearables where system-level power gating is critical. |
| Efficiency | Up to 95% at 3.3VIN/1.8VOUT/200mA; achieved via synchronous rectification and low RDS(on) switches, reducing heat generation in sealed enclosures. |
| Duty Cycle | 100% supported; maintains regulation down to VIN ≈ VOUT + ILOAD × (0.44Ω + 0.29Ω), enabling operation near battery end-of-discharge. |
Pinout & Package
MP2104DJ-1.8-LF-P is housed in a lead-free, RoHS-compliant TSOT23-5 package (1.0mm height, 2.9mm × 1.6mm footprint) with exposed pad omitted - thermal performance relies on PCB copper area under pins 2 (GND) and 4 (IN).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | EN | Active-high enable input; logic threshold 0.3V (off) / 1.5V (on); allows system-level power sequencing and deep-sleep control with <1μA quiescent draw when pulled low. |
| 2 | GND | Power ground return for SW, IN, and internal circuitry; must connect to solid PCB ground plane to minimize noise coupling and support thermal dissipation (θJA = 220°C/W). |
| 3 | SW | Switch node connecting internal PFET drain and NFET source; routes high di/dt switching current to external inductor; requires tight layout to reduce EMI and voltage spikes. |
| 4 | IN | Main power input (2.5–6V); requires local 4.7μF X5R/X7R ceramic bypass capacitor placed within 2mm to suppress switching transients and stabilize input impedance. |
| 5 | OUT | Fixed-output voltage sense; connects internally to precision resistor divider; no external feedback components needed - simplifies BOM and improves production yield. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing conduction loss by ~30% vs. asynchronous designs and enabling >90% efficiency at 100mA–600mA loads. |
| Current-mode PWM control | Provides inherent cycle-by-cycle current limiting, fast line/load transient response (<50μs settling), and stable operation without external compensation components. |
| 100% duty-cycle operation | Maintains regulation when VIN drops to within ~150mV of VOUT at 600mA, extending usable battery range in Li+-powered devices beyond conventional buck converters. |
| Thermal & short-circuit protection | Auto-recovering shutdown at 145°C junction temperature and reduced-frequency short-circuit mode prevent damage during sustained overload or PCB solder faults. |
| Low shutdown current | <1μA max draw in EN = low state ensures negligible battery drain during multi-week storage or firmware update cycles in IoT endpoints. |
Applications
| Smartphone Core Rail | DSP Audio Processing |
|---|---|
|
Use Scenario: Powering ARM Cortex-A53 CPU cores requiring stable 1.8V at up to 500mA during burst-mode video decode. IC Role / Device Role / Timing Role: Primary synchronous buck regulator supplying core logic voltage; operates at 1.7MHz to avoid AM radio band interference and enable small passive components. Use Value: Delivers 94% efficiency at 3.7VIN/1.8VOUT/400mA, reducing thermal load on stacked PCBs and eliminating need for heatsinking in 7mm-thin form factors. |
Use Scenario: Generating clean 1.8V supply for TI C55x DSP audio codecs in portable Bluetooth speakers. IC Role / Device Role / Timing Role: Low-noise point-of-load regulator; uses current-mode control to reject ripple from shared 3.3V system rail and maintain PSRR >60dB at 100kHz. Use Value: Fixed 1.8V output tolerance (±3%) ensures consistent ADC reference stability and prevents digital audio clipping across battery discharge curve (3.6V → 3.0V). |
| Wearable Sensor Hub | Industrial Handheld Terminal |
|
Use Scenario: Powering Bosch BME680 environmental sensor + Nordic nRF52840 MCU in coin-cell–powered fitness trackers. IC Role / Device Role / Timing Role: Always-on buck converter with ultra-low shutdown current; enabled only during sensor readout bursts to extend 220mAh CR2032 life beyond 12 months. Use Value: 0.01μA shutdown current minimizes self-discharge; 100% duty cycle sustains 1.8V output down to 2.55V input, capturing full battery capacity before cutoff. |
Use Scenario: Supplying 1.8V I/O rail for FPGA configuration memory and LVDS display interface in ruggedized warehouse scanners. IC Role / Device Role / Timing Role: Industrial-grade DC/DC stage tolerant of 125kPa pressure washes and –25°C cold starts; leverages thermal shutdown for fault containment. Use Value: TSOT23-5 package withstands 50g mechanical shock; 145°C thermal trip protects against sustained overcurrent in dusty, poorly ventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS62231DRYR | 1.8V fixed, 600mA, 3MHz switching, 2.05–6.5V input, 2.5μA quiescent current in PWM mode | Higher frequency enables smaller inductors but increases EMI sensitivity; lacks 100% duty cycle | Select when board space is constrained and input voltage stays ≥3.0V; avoid for Li+ end-of-discharge operation. |
| Analog Devices ADP2301ARMZ-1.8-R7 | 1.8V fixed, 600mA, 700kHz switching, 3.0–20V input, 2.5mA quiescent current, requires external diode | Asynchronous architecture reduces efficiency (~88% at 3.3VIN) and adds BOM cost; wider input suits industrial 5V/12V rails | Select only for legacy 5V-powered instrumentation where efficiency is secondary to input voltage range. |
Compared with TPS62231DRYR and ADP2301ARMZ-1.8-R7, MP2104DJ-1.8-LF-P uniquely combines 100% duty cycle, 1.7MHz frequency, and sub-1μA shutdown current in a 5-pin TSOT23, making it optimal for battery-critical portable applications where dropout margin and standby leakage dominate design trade-offs.
Availability
MP2104DJ-1.8-LF-P is available at Aetrix Electronics and suitable for smartphone core rails, wearable sensor hubs, industrial handheld terminals, and DSP audio processing systems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MP2104DJ-1.8-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, and global manufacturing partnerships.
The MP2104 series belongs to MPS's high-frequency synchronous buck converter product line, engineered specifically for space- and efficiency-constrained portable electronics powered by single-cell Li-ion batteries.
FAQ
What is the recommended input capacitor for MP2104DJ-1.8-LF-P?
A 4.7μF X5R or X7R ceramic capacitor placed within 2mm of the IN and GND pins is specified in the datasheet for optimal high-frequency decoupling. This value suppresses switching noise and maintains input impedance below the source impedance at 1.7MHz, preventing instability and voltage droop during load transients.
Does MP2104DJ-1.8-LF-P require external feedback resistors?
No. The MP2104DJ-1.8-LF-P uses an internal resistor divider connected to the OUT pin to set the fixed 1.8V output, eliminating external feedback components. This reduces BOM count, layout complexity, and potential drift from resistor tolerance or temperature coefficients.
Can MP2104DJ-1.8-LF-P operate with a 2.5V input?
Yes. The device supports input voltages from 2.5V to 6V and can sustain 1.8V output at full 600mA load down to 2.5V input using 100% duty cycle. However, maximum load current decreases below 2.8V due to increased conduction losses in the internal PFET and NFET switches.
What is the thermal resistance θJA for the TSOT23-5 package?
The datasheet specifies θJA = 220°C/W for the TSOT23-5 package on a standard 4-layer JEDEC test board. Real-world performance improves significantly with ≥1cm² copper pour connected to pins 2 (GND) and 4 (IN), reducing effective θJA to ~120°C/W in optimized layouts.
How does short-circuit protection work on MP2104DJ-1.8-LF-P?
Under output short-circuit, the device reduces switching frequency and lowers the PFET current limit to 0.7–1.35A, limiting fault current and power dissipation. Once the short is removed and FB/OUT voltage recovers to 0.6V, normal operation resumes automatically without requiring reset or power cycle.
Is MP2104DJ-1.8-LF-P compatible with the EV2104DJ-00A evaluation board?
Yes. The EV2104DJ-00A board is designed for the MP2104DJ family and supports all fixed-output variants including MP2104DJ-1.8-LF-P. It implements the recommended 10μH inductor, 4.7μF input, and 10μF output capacitors per the datasheet layout guidelines.
What is the output voltage accuracy over temperature?
The MP2104DJ-1.8-LF-P guarantees output voltage accuracy of ±3% (1.746V to 1.854V) across the full operating temperature range of –40°C to +85°C, measured at 50mA load, ensuring reliable logic-level compatibility for 1.8V I/O standards.
MP2104DJ-1.8-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.7MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MP2104DJ-1.8-LF-P FAQ
1.How can I place an order for MP2104DJ-1.8-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2104DJ-1.8-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 MP2104DJ-1.8-LF-P reliable?
The price and inventory of MP2104DJ-1.8-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 MP2104DJ-1.8-LF-P is usually 5 days.
3.What payment methods are accepted for MP2104DJ-1.8-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2104DJ-1.8-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2104DJ-1.8-LF-P?
MP2104DJ-1.8-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2104DJ-1.8-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 MP2104DJ-1.8-LF-P?
For technical support, including MP2104DJ-1.8-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2104DJ-1.8-LF-P requirements.
6.How does Aetrix verify that MP2104DJ-1.8-LF-P is sourced from the original manufacturer or authorized distributors?
All MP2104DJ-1.8-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 MP2104DJ-1.8-LF-P meets industry standards.
7.What is the process for return or replacement of MP2104DJ-1.8-LF-P?
All MP2104DJ-1.8-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2104DJ-1.8-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 MP2104DJ-1.8-LF-P part is unused and in its original packaging.
Return procedure for MP2104DJ-1.8-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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