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Monolithic Power Systems Inc. MP2104DJ-1.5-LF-Z
- Part No.:
- MP2104DJ-1.5-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MP2104DJ-1.5-LF-Z.pdf
- Description:
- IC REG BUCK 1.5V 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,049
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Product details
Overview
MP2104DJ-1.5-LF-Z from Monolithic Power Systems is a 1.7MHz, 600mA synchronous step-down DC/DC converter in TSOT23-5 package with fixed 1.5V output, 2.5V–6V input range, and 100% duty-cycle capability for low-dropout operation in Li+-powered portable devices.
For engineers reviewing the MP2104DJ-1.5-LF-Z datasheet, MP2104DJ-1.5-LF-Z pinout, MP2104DJ-1.5-LF-Z application, or MP2104DJ-1.5-LF-Z equivalent, this page delivers verified electrical parameters, thermal performance data, fixed-output regulation accuracy (±3%), shutdown current (<1μA), and real-world efficiency curves at 3.3V/4.2V input.
Technical Context
The MP2104DJ-1.5-LF-Z implements constant-frequency current-mode PWM control with internal PFET/NFET power switches, enabling high-efficiency synchronous rectification without external diodes. Its 1.7MHz switching frequency allows compact 2.2μF input and 4.7μF output ceramic capacitors.
It features cycle-by-cycle current limiting, thermal shutdown at 145°C, short-circuit protection with frequency foldback, and EN pin logic-level enable/disable (0.3V/1.5V thresholds). The fixed 1.5V output eliminates external feedback resistors, simplifying layout for core voltage rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.7 MHz ±25% - Enables use of small 2.2μF input and 4.7μF output ceramic capacitors; reduces board area vs. lower-frequency converters. |
| Output Voltage | 1.5 V ±3% (–40°C to +85°C) - Tight regulation suitable for DSP/microprocessor core supplies requiring stable 1.5V bias. |
| Max Load Current | 600 mA continuous - Sustains full rated current across 2.5V–6V input range; derates gracefully below 2.5V due to RDS(on) limits. |
| Input Voltage Range | 2.5 V to 6 V - Matches single-cell Li-ion (2.7–4.2V) and dual-cell alkaline (3–6V) battery systems without pre-regulation. |
| Shutdown Current | <1 μA - Extends battery life in standby mode; enables ultra-low-power wake-on-event architectures. |
| Duty Cycle Range | 0% to 100% - Supports dropout operation down to VIN = VOUT + ILOAD × (RDS(on,P + RDS(on,N + RIND). |
| Thermal Shutdown | 145 °C - Protects die during sustained overload or poor PCB thermal design; auto-recovery on cooldown. |
Pinout & Package
MP2104DJ-1.5-LF-Z uses the TSOT23-5 package (1.0mm height, 2.9mm × 1.6mm footprint) with exposed pad not present - thermal path relies on PCB copper via leads. Pin functions are validated per MPS datasheet Rev. 1.4.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | EN | Enable control input; active-high logic (≥1.5V = ON, ≤0.3V = shutdown); draws <1μA in OFF state. |
| 2 | GND | Power ground reference for all internal circuitry and switch node return path; must connect to solid PCB ground plane. |
| 3 | SW | Switch node output; connects to inductor; carries high di/dt pulsed current; requires tight layout to minimize EMI. |
| 4 | IN | Main power input (2.5–6V); requires local 2.2μF X5R/X7R ceramic bypass capacitor placed within 2mm. |
| 5 | OUT | Fixed 1.5V output sense pin; internally connected to precision resistor divider; no external feedback components needed. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated PFET/NFET switches eliminate Schottky diode loss, enabling >92% peak efficiency at 3.3V→1.5V/300mA. |
| Current-mode PWM control | Provides inherent cycle-by-cycle current limiting, fast transient response, and stable operation without external compensation. |
| 100% duty-cycle operation | Permits linear dropout behavior when VIN approaches VOUT, extending usable battery range in portable systems. |
| Short-circuit protection | Reduces switching frequency and lowers current limit during fault, limiting power dissipation and preventing thermal runaway. |
| Low quiescent current | 400–600μA operating supply current enables >100-hour runtime in always-on sensor nodes powered by coin cells. |
Applications
| Smartphone Core Rail | DSP Processor Supply |
|---|---|
|
Use Scenario: Powers ARM Cortex-A series application processor cores requiring tightly regulated 1.5V at up to 600mA during burst-mode operation. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable core voltage; operates at 1.7MHz to avoid AM radio band interference. Use Value: Delivers 93% efficiency at 3.6V→1.5V/400mA, reducing thermal load on thin smartphone PCBs while supporting 100% duty cycle during brownout. |
Use Scenario: Supplies TI C6000 or Analog Devices SHARC DSP cores in portable audio analyzers with strict ripple & noise requirements. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter providing low-noise 1.5V rail; current-mode control ensures <50μs load transient recovery. Use Value: Achieves <15mVpp output ripple with 4.7μF X5R output cap, meeting DSP analog section PSRR specs without additional LDO post-regulation. |
| Portable Medical Sensor | Wearable Fitness Tracker |
|
Use Scenario: Powers low-power ECG front-end ASICs in disposable patch monitors running from CR2032 coin cell (3V nominal). IC Role / Device Role / Timing Role: Efficient step-down regulator enabling 1.5V operation from declining battery voltage (3.0V → 2.5V). Use Value: Maintains regulation down to 2.5V input with 100% duty cycle, extending usable battery life by 18% versus non-dropout alternatives. |
Use Scenario: Supplies motion sensor hub (accelerometer + gyroscope + BLE SoC) in wrist-worn trackers with space-constrained 2-layer PCB. IC Role / Device Role / Timing Role: Compact power solution using TSOT23-5 footprint; 1.7MHz switching avoids audible noise in piezoelectric components. Use Value: Occupies only 4.6mm² PCB area including bypass caps; shutdown current <0.1μA enables multi-year shelf life before first use. |
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 output; 3MHz switching; 300mA max load; 2.05–6.5V input | Higher frequency enables smaller inductors but lower current rating limits use in 600mA DSP rails. | Select when board space is critical and load current ≤300mA; not drop-in due to different output voltage and pinout. |
| Analog Devices ADP2301ARMZ-1.5-R7 | 1.5V fixed output; 700kHz switching; 600mA load; 3–20V input; larger MSOP-8 package | Wider input range suits industrial 12V systems but lower frequency increases inductor size and audible noise risk. | Choose for higher-input-voltage systems where thermal margin exceeds TSOT23-5 limits; requires PCB redesign. |
Compared with TPS62231DRYR and ADP2301ARMZ-1.5-R7, MP2104DJ-1.5-LF-Z uniquely balances 600mA capability, 1.7MHz frequency, 2.5V minimum input, and TSOT23-5 footprint-making it optimal for space-constrained Li+-powered 1.5V core rails where dropout and efficiency are co-prioritized.
Availability
MP2104DJ-1.5-LF-Z is available at Aetrix Electronics and suitable for smartphone core rails, DSP processor supplies, portable medical sensors, and wearable fitness trackers requiring stable component supply with full traceability and lifecycle management.
Supply support for MP2104DJ-1.5-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 over 20 years of leadership in DC/DC conversion and motor driver technology.
The MP2104 product line targets portable and battery-powered applications demanding high efficiency, small size, and robust protection-designed specifically for Li-ion–based consumer electronics where thermal and board-area constraints dominate.
FAQ
What is the maximum junction temperature and thermal shutdown threshold?
The MP2104DJ-1.5-LF-Z has a maximum junction temperature of +150°C and activates thermal shutdown at +145°C. Recovery occurs automatically once die temperature falls below +135°C. Thermal resistance θJA is 220°C/W for TSOT23-5 on a standard 2-layer PCB, requiring adequate copper pour under pins 2 (GND) and 4 (IN) for reliable 600mA operation.
Does MP2104DJ-1.5-LF-Z require external feedback resistors?
No. Unlike adjustable versions (MP2104DJ), the MP2104DJ-1.5-LF-Z integrates an internal resistor divider tied to the OUT pin, setting output voltage precisely to 1.5V. This eliminates external feedback components, reduces BOM count, and improves layout simplicity and long-term stability.
Can MP2104DJ-1.5-LF-Z operate with input voltage below 2.5V?
No. The absolute minimum input voltage is 2.5V per datasheet specifications. Below this, UVLO prevents startup, and operation is not guaranteed. At exactly 2.5V, the device sustains ~450mA load due to PFET/NFET RDS(on) losses-full 600mA requires ≥2.7V input.
What is the recommended input capacitor and placement?
A 2.2μF or greater X5R/X7R ceramic capacitor is required, placed within 2mm of the IN and GND pins. Layout must minimize loop area between capacitor, IN pin, and GND pin to suppress high-frequency switching noise and prevent input rail collapse during load transients.
How does short-circuit protection behave during output fault?
During output short, the MP2104DJ-1.5-LF-Z reduces oscillator frequency and lowers PFET current limit to ~0.7A, limiting power dissipation. Output voltage drops to ~0.2V, and the device remains in hiccup mode until the short is removed and FB/OUT voltage recovers to 1.5V ±3%, at which point normal regulation resumes.
Is the TSOT23-5 package lead-free and RoHS compliant?
Yes. The "-LF" suffix confirms lead-free termination, and "-Z" indicates tape-and-reel packaging. The device meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/60% RH.
What is the typical efficiency at 3.3V input and 1.5V/500mA output?
Typical efficiency is 92.5% at 3.3V→1.5V/500mA, per Figure MP2104-TPC03 in the datasheet. Efficiency peaks at 93.8% near 300mA and remains above 88% across 10–600mA load range with 3.3V input, enabled by synchronous rectification and low RDS(on) switches.
MP2104DJ-1.5-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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.5V
- 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-1.5-LF-Z FAQ
1.How can I place an order for MP2104DJ-1.5-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2104DJ-1.5-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-1.5-LF-Z reliable?
The price and inventory of MP2104DJ-1.5-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-1.5-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2104DJ-1.5-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2104DJ-1.5-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2104DJ-1.5-LF-Z?
MP2104DJ-1.5-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2104DJ-1.5-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-1.5-LF-Z?
For technical support, including MP2104DJ-1.5-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2104DJ-1.5-LF-Z requirements.
6.How does Aetrix verify that MP2104DJ-1.5-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2104DJ-1.5-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-1.5-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2104DJ-1.5-LF-Z?
All MP2104DJ-1.5-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2104DJ-1.5-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-1.5-LF-Z part is unused and in its original packaging.
Return procedure for MP2104DJ-1.5-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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