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Monolithic Power Systems Inc. MP2104DJ-LF-P
- Part No.:
- MP2104DJ-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MP2104DJ-LF-P.pdf
- Description:
- IC REG BUCK ADJ 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:195
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Product details
Overview
MP2104DJ-LF-P from Monolithic Power Systems is a 1.7MHz constant-frequency, current-mode PWM synchronous step-down converter in TSOT23-5 package. It delivers up to 600mA load current from 2.5V–6V input, regulates output down to 0.6V, supports 100% duty cycle for low-dropout operation, and integrates main PFET and synchronous NFET switches-eliminating external Schottky diodes. It targets Li+-powered portable devices such as smartphones and digital cameras.
For engineers reviewing the MP2104DJ-LF-P datasheet, MP2104DJ-LF-P pinout, MP2104DJ-LF-P application, or MP2104DJ-LF-P equivalent, key selection criteria include its 0.6V feedback reference, 1.7MHz fixed switching frequency, thermal/short-circuit protection, and TSOT23-5 footprint compatibility with space-constrained battery-powered designs.
Technical Context
The MP2104DJ-LF-P implements slope-compensated current-mode control with a 1.7MHz oscillator, enabling stable regulation and cycle-by-cycle peak current limiting. Its internal 0.6V feedback reference (±2% over temperature) sets output voltage via external resistor divider, while EN pin provides logic-level enable/disable with <0.1μA shutdown current.
It features integrated PFET (0.44Ω RDS(on)) and NFET (0.29Ω RDS(on)) power switches, allowing 100% duty-cycle operation near dropout and delivering up to 95% efficiency at 3.3VIN/1.8VOUT. Protection includes thermal shutdown (145°C trip), short-circuit foldback, and UVLO (2.27V rising threshold).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.7MHz ±22% - enables compact LC filter design with ≤10μH inductors and ceramic capacitors. |
| Max Output Current | 600mA continuous - sufficient for core supplies of microprocessors, DSPs, and camera sensors. |
| Input Voltage Range | 2.5V to 6V - matches single-cell Li-ion (2.7–4.2V) and USB-powered systems with margin. |
| Feedback Reference Voltage | 0.600V ±2% - sets precise output voltage via external resistor divider; supports 0.6V–6V adjustable range. |
| Duty Cycle Capability | 100% - maintains regulation during input voltage sag (e.g., Li+ discharge to 2.5V while powering 1.8V rail). |
| Shutdown Current | <0.1μA - preserves battery life in standby mode for portable electronics. |
| Thermal Shutdown | 145°C - protects die under sustained overload or poor PCB thermal design. |
Pinout & Package
MP2104DJ-LF-P uses the TSOT23-5 package (1.0mm height, 2.9mm × 1.6mm footprint), with exposed pad omitted-thermal path relies on PCB copper area under pins 2 (GND) and adjacent traces. Pin functions are validated per MPS datasheet Rev. 1.4.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | EN | Logic-enable input: >1.5V = active, <0.3V = shutdown; controls 0.1μA quiescent state. |
| 2 | GND | Power and signal ground reference; connects to PCB ground plane for thermal and noise control. |
| 3 | SW | Switch node connecting internal PFET/NFET drains to external inductor; carries high di/dt switching current. |
| 4 | IN | Input supply rail (2.5–6V); requires local 2.2μF+ ceramic bypass capacitor. |
| 5 | FB | Feedback input sensing output voltage divider; regulated at 0.6V; determines VOUT = 0.6V × (1 + R1/R2). |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated NFET replaces Schottky diode-reduces conduction loss and improves light-load efficiency. |
| Current-mode PWM control | Enables fast transient response and inherent cycle-by-cycle current limiting without external sense resistor. |
| 100% duty-cycle operation | Maintains regulation when VIN ≈ VOUT, critical for Li+ battery discharge down to 2.5V. |
| Thermal & short-circuit protection | Auto-recovering shutdown prevents damage during overload, ambient rise, or output fault conditions. |
| Low shutdown current | <0.1μA enables multi-week battery shelf life in always-on portable devices. |
Applications
| Smartphone Core Rail | DSP Processor Supply |
|---|---|
Use Scenario: Powering ARM Cortex-A series application processors in dual-SIM LTE smartphones with dynamic voltage scaling. IC Role / Device Role / Timing Role: Primary buck regulator generating 1.1V–1.3V core voltage from single-cell Li+ battery (3.0–4.2V). Use Value: 1.7MHz switching allows use of 2.2μF input and 4.7μF output ceramic capacitors, reducing board area by >40% vs. 500kHz converters. | Use Scenario: Supplying TI C6000 or Analog Devices SHARC DSPs in portable audio analyzers requiring clean, low-noise 1.2V core rails. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with tight load regulation (<±2%) across 10mA–600mA. Use Value: 0.6V feedback reference and current-mode control deliver <15mV output deviation during 500mA step transients, preserving signal integrity. |
| Digital Camera Sensor Bias | Portable Medical Monitor |
Use Scenario: Generating 2.8V bias for CMOS image sensors in compact 4K video recorders powered by 3.7V Li+ cells. IC Role / Device Role / Timing Role: Adjustable-output buck converter operating in forced PWM mode to suppress switching noise near analog sensor circuitry. Use Value: Fixed 1.7MHz frequency avoids interference with sensor pixel clock harmonics; 95% peak efficiency extends recording time per charge. | Use Scenario: Providing isolated 3.3V logic rail for ECG front-end ASICs and Bluetooth LE radios in handheld patient monitors. IC Role / Device Role / Timing Role: Primary DC/DC converter supporting battery backup operation with <0.1μA shutdown current during sleep mode. Use Value: 100% duty cycle sustains 3.3V output as battery discharges from 4.1V to 2.8V-enabling 72-hour continuous monitoring on single charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS62231DRYR | 3MHz switching frequency, 0.6V reference, 600mA rating, 2.05–6.5V input; smaller 1.2mm × 1.6mm DSBGA package. | Higher frequency enables smaller inductors but increases EMI sensitivity; lacks 100% duty cycle support. | Prefer for ultra-compact layouts where EMI filtering is feasible and dropout headroom exceeds 300mV. |
| Analog Devices ADP2301ARMZ-R7 | Fixed 1.4MHz frequency, 0.8V reference, 600mA rating, 3–20V input; requires external Schottky diode. | Wider input range suits multi-cell or industrial supplies, but lower efficiency (~90% max) and larger solution size due to diode. | Prefer when input exceeds 6V or cost sensitivity outweighs PCB area and efficiency requirements. |
Compared with TPS62231DRYR and ADP2301ARMZ-R7, MP2104DJ-LF-P uniquely combines 100% duty cycle, integrated synchronous FETs, and 1.7MHz operation in a TSOT23-5 package-making it optimal for space- and battery-life-constrained single-cell Li+ systems needing robust dropout behavior.
Availability
MP2104DJ-LF-P is available at Aetrix Electronics and suitable for smartphone power management, portable medical instrumentation, digital camera sensor biasing, and DSP core supply applications requiring stable component supply, full production traceability, and long-term lifecycle support.
Supply support for MP2104DJ-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 distribution since 1997.
The MP2104 belongs to MPS's high-frequency synchronous buck converter product line, engineered specifically for portable Li+-powered devices demanding minimal PCB area, high efficiency across load range, and seamless dropout transition.
FAQ
What is the minimum recommended output voltage for MP2104DJ-LF-P?
The MP2104DJ-LF-P supports output voltages as low as 0.6V, set by its internal 0.600V ±2% feedback reference and external resistor divider. This enables direct generation of sub-1V core rails for modern low-power microcontrollers and SoCs without additional post-regulation stages.
Does MP2104DJ-LF-P require an external Schottky diode?
No. The MP2104DJ-LF-P integrates both a PFET main switch and an NFET synchronous rectifier, eliminating the need for an external Schottky diode. This reduces component count, improves efficiency-especially at light loads-and simplifies layout compared to asynchronous buck converters.
How does the EN pin function, and what voltage thresholds activate shutdown?
The EN pin is a logic-controlled enable input. Driving EN above 1.5V (typical) turns the regulator on; driving it below 0.3V (typical) places the device in shutdown mode with <0.1μA quiescent current. Hysteresis of ~55mV prevents chatter near the threshold.
Can MP2104DJ-LF-P operate with input voltage equal to output voltage?
Yes. The MP2104DJ-LF-P supports 100% duty-cycle operation, allowing it to maintain regulation when input voltage drops to within the sum of the PFET RDS(on) drop and inductor DCR drop above the output voltage-critical for deep Li+ battery discharge scenarios.
What thermal considerations apply to the TSOT23-5 package?
The TSOT23-5 package has θJA = 220°C/W on a standard 4-layer PCB. To sustain 600mA continuous load, ensure ≥1cm² copper pour connected to pin 2 (GND) and minimize trace resistance to IN/SW/GND. Thermal shutdown triggers at 145°C junction temperature.
Is MP2104DJ-LF-P compatible with ceramic output capacitors?
Yes. The MP2104DJ-LF-P is optimized for X5R/X7R ceramic output capacitors (e.g., 4.7μF). Its internal compensation and current-mode architecture ensure stability with low-ESR ceramics-no tantalum or electrolytic capacitors required.
What is the typical efficiency at 3.3V input and 1.8V/300mA output?
At VIN = 3.3V, VOUT = 1.8V, and IOUT = 300mA, the MP2104DJ-LF-P achieves approximately 92% efficiency, as confirmed by Figure MP2104-TPC03 in the datasheet. Efficiency remains >85% down to 10mA load due to synchronous rectification.
MP2104DJ-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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 6V
- 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-LF-P FAQ
1.How can I place an order for MP2104DJ-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2104DJ-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-LF-P reliable?
The price and inventory of MP2104DJ-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-LF-P is usually 5 days.
3.What payment methods are accepted for MP2104DJ-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2104DJ-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2104DJ-LF-P?
MP2104DJ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2104DJ-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-LF-P?
For technical support, including MP2104DJ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2104DJ-LF-P requirements.
6.How does Aetrix verify that MP2104DJ-LF-P is sourced from the original manufacturer or authorized distributors?
All MP2104DJ-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-LF-P meets industry standards.
7.What is the process for return or replacement of MP2104DJ-LF-P?
All MP2104DJ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2104DJ-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-LF-P part is unused and in its original packaging.
Return procedure for MP2104DJ-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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