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Monolithic Power Systems Inc. MP2104DJ-LF-Z
- Part No.:
- MP2104DJ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MP2104DJ-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:14,942
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Product details
Overview
MP2104DJ-LF-Z from Monolithic Power Systems is a 1.7MHz constant-frequency, current-mode PWM synchronous step-down converter delivering up to 600mA load current from 2.5V–6V input, regulating output down to 0.6V with integrated PFET/NFET switches-enabling high-efficiency (up to 95%) power conversion in space-constrained Li+-powered portable devices such as smart phones and digital cameras.
For engineers reviewing the MP2104DJ-LF-Z datasheet, MP2104DJ-LF-Z pinout, MP2104DJ-LF-Z application, or MP2104DJ-LF-Z equivalent, key selection considerations include its 100% duty-cycle dropout capability, 0.6V feedback reference, <0.1μA shutdown current, thermal/short-circuit protection, and TSOT23-5 package compatibility with compact PCB layouts.
Technical Context
The MP2104DJ-LF-Z implements slope-compensated current-mode control for stable regulation across line/load transients and inherent cycle-by-cycle current limiting. Its 1.7MHz fixed-frequency operation enables small external passive components while maintaining tight output voltage regulation (±2% over temperature) via a precision 0.600V ±2% internal feedback reference.
It integrates both high-side PFET (0.44Ω RDS(on)) and low-side NFET (0.29Ω RDS(on)) switches, eliminating external diode losses. The EN pin provides precise enable threshold (0.3V to 1.5V), and the device enters ultra-low-power shutdown (<0.1μA) when disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.7MHz ±25% - Enables use of small 1–10μH inductors and ceramic capacitors for compact footprint. |
| Max Output Current | 600mA - Sustained continuous load under thermal limits at TA = +25°C with proper PCB copper area. |
| Input Voltage Range | 2.5V to 6V - Matches single-cell Li-ion battery discharge profile (4.2V → 2.5V) without intermediate regulation. |
| Feedback Reference Voltage | 0.600V ±2% - Sets output via external resistor divider; enables 0.6V–6V adjustable VOUT with ±1.5% total accuracy. |
| Shutdown Current | <0.1μA - Minimizes battery drain during system sleep modes in portable applications. |
| Thermal Shutdown Threshold | 145°C - Protects die integrity; auto-recovery after cooldown ensures robust field operation. |
| PFET On Resistance | 0.44Ω - Limits conduction loss at 600mA, contributing to ≥92% efficiency at mid-load (VIN=3.3V, VOUT=1.8V). |
Pinout & Package
MP2104DJ-LF-Z is housed in a 5-pin TSOT23-5 package (1.0mm height, JEDEC MO-193 AA), with exposed pad omitted-thermal dissipation relies on PCB copper area under pins 2 (GND) and 4 (IN). Pin 1 (EN) controls startup/shutdown; Pin 3 (SW) drives the inductor; Pin 5 (FB) senses output via resistive divider.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | EN | Enable control input: logic-high (>1.5V) activates regulator; logic-low (<0.3V) forces shutdown with <0.1μA quiescent draw. |
| 2 | GND | Power ground return for internal switches and control circuitry; must connect to solid PCB ground plane for stability and thermal relief. |
| 3 | SW | Switch node connecting internal PFET/NFET drains to inductor; carries high di/dt switching current-requires short, low-inductance routing. |
| 4 | IN | Main power input (2.5V–6V); requires local 2.2μF+ X5R/X7R ceramic bypass capacitor placed adjacent to pin for EMI suppression. |
| 5 | FB | Feedback input referenced to 0.600V; connects to center tap of external resistor divider to set regulated output voltage (0.6V–6V). |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated NFET replaces Schottky diode-eliminates 0.3V forward drop, enabling >95% peak efficiency and no external diode BOM cost. |
| 100% duty-cycle operation | Allows VIN-to-VOUT dropout ≤150mV at 600mA-critical for maintaining core voltage during Li+ battery sag near end-of-discharge. |
| Current-mode PWM control | Provides inherent cycle-by-cycle current limiting and fast transient response without external compensation components. |
| Thermal & short-circuit protection | Auto-throttles switching frequency and reduces PFET current limit during fault-prevents damage without requiring external circuitry. |
| Low shutdown current | <0.1μA enables multi-week battery shelf life in always-on IoT sensors or standby peripherals. |
Applications
| Smartphone Core Rail | DSP I/O Supply |
|---|---|
|
Use Scenario: Powers ARM Cortex-A series application processor I/O domain from single Li+ cell (3.0–4.2V). IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering stable 1.8V @ 600mA with fast load-step response. Use Value: Eliminates need for discrete MOSFET + diode + controller; 1.7MHz switching allows 2.2μF input / 4.7μF output ceramics, reducing board area by >30% vs lower-frequency alternatives. |
Use Scenario: Supplies 1.2V rail to TI C6000 DSP I/O buffers in portable audio analyzers. IC Role / Device Role / Timing Role: Adjustable-output buck converter configured via FB divider for precise 1.2V regulation. Use Value: 0.6V feedback reference enables accurate low-VOUT setting; 100% duty cycle sustains regulation down to VIN = 1.35V, extending usable battery range. |
| Digital Camera Sensor Bias | Wearable MCU Core |
|
Use Scenario: Generates clean 2.8V bias for CMOS image sensor analog front-end in compact action cameras. IC Role / Device Role / Timing Role: High-PSRR, low-noise step-down converter operating at 1.7MHz to avoid interference with sensor readout timing. Use Value: Integrated synchronous switches reduce switching ripple; thermal shutdown prevents overheating in sealed enclosures during extended video capture. |
Use Scenario: Powers Nordic nRF52840 SoC core (0.8–1.3V) from coin-cell or thin-film battery in medical patches. IC Role / Device Role / Timing Role: Ultra-low-IQ buck regulator supporting deep-sleep modes with <0.1μA shutdown current. Use Value: Extends battery life beyond 12 months in intermittent-sensing applications; TSOT23-5 footprint fits sub-10mm² wearable PCBs. |
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 | 1.8MHz switching, 600mA, 0.6V ref, but uses external compensation and lacks 100% duty cycle. | Requires additional RC network for loop stability; unsuitable for ultra-low-VIN dropout scenarios. | Select when design already uses TI ecosystem tools or needs adjustable soft-start not offered by MP2104DJ. |
| Analog Devices ADP2303ARMZ-R7 | Fixed 3.3V/5V variants only; 0.8V ref; 300mA max output; no 100% duty cycle. | Limited to higher-VOUT, lower-current applications-cannot replace MP2104DJ's 0.6V–6V adjustability or 600mA capability. | Consider only for legacy designs where ADI qualification is mandated and output requirements align with fixed options. |
Compared with TPS62231DRYR and ADP2303ARMZ-R7, MP2104DJ-LF-Z uniquely combines adjustable 0.6V–6V output, 600mA capacity, 100% duty cycle, and zero external compensation-making it optimal for new Li+-powered portable designs demanding minimal BOM count and maximum battery utilization.
Availability
MP2104DJ-LF-Z is available at Aetrix Electronics and suitable for smartphone power rails, wearable MCU cores, digital camera sensor bias, and portable instrument supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MP2104DJ-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP2104 belongs to MPS's high-frequency synchronous buck converter product line, engineered specifically for space- and efficiency-critical battery-powered portable electronics-emphasizing integration, low quiescent current, and robust protection features.
FAQ
What is the minimum input voltage required for MP2104DJ-LF-Z to regulate a 1.8V output?
The MP2104DJ-LF-Z maintains regulation down to 2.5V input for a 1.8V output under full 600mA load. Below 2.5V, UVLO disables the device. At light loads (<100mA), regulation can extend slightly lower due to reduced IR drop, but operation below 2.5V is not guaranteed per datasheet specifications.
Can MP2104DJ-LF-Z be used with an output voltage lower than 0.6V?
No. The internal feedback reference is fixed at 0.600V ±2%, and the device is not designed to regulate below this threshold. Attempting to set VOUT < 0.6V via external divider violates the error amplifier's common-mode input range and results in loss of regulation and potential instability.
How does the MP2104DJ-LF-Z handle short-circuit conditions?
Under output short-circuit, the MP2104DJ-LF-Z reduces switching frequency and lowers the PFET current limit to ~0.7A, limiting fault current and power dissipation. Once the short is removed and FB voltage recovers to 0.6V, normal operation resumes automatically-no latch-off or manual reset required.
Is an external compensation network required for MP2104DJ-LF-Z?
No. The MP2104DJ-LF-Z uses internal Type-II compensation optimized for standard 1–10μH inductors and ceramic output capacitors. No external compensation components are needed-simplifying layout and reducing BOM count versus controllers requiring external networks.
What PCB layout practices are critical for stable MP2104DJ-LF-Z operation?
Key practices include: (1) placing 2.2μF input capacitor within 2mm of IN/GND pins; (2) routing SW trace short and wide, away from FB/EN; (3) connecting FB resistors directly to pin 5 with minimal trace length; (4) tying GND pin 2 to a large internal/external ground plane for thermal and noise control.
Does MP2104DJ-LF-Z support forced PWM mode or only PFM at light load?
The MP2104DJ-LF-Z operates exclusively in PWM mode across all load conditions-no pulse-frequency modulation (PFM) or discontinuous conduction mode (DCM) is implemented. This ensures constant 1.7MHz switching, predictable EMI spectrum, and consistent transient response even at microamp loads.
MP2104DJ-LF-Z 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-Z FAQ
1.How can I place an order for MP2104DJ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2104DJ-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 MP2104DJ-LF-Z reliable?
The price and inventory of MP2104DJ-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 MP2104DJ-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2104DJ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2104DJ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2104DJ-LF-Z?
MP2104DJ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2104DJ-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 MP2104DJ-LF-Z?
For technical support, including MP2104DJ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2104DJ-LF-Z requirements.
6.How does Aetrix verify that MP2104DJ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2104DJ-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 MP2104DJ-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2104DJ-LF-Z?
All MP2104DJ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2104DJ-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 MP2104DJ-LF-Z part is unused and in its original packaging.
Return procedure for MP2104DJ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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