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Monolithic Power Systems Inc. MP2104DQT-LF-Z
- Part No.:
- MP2104DQT-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MP2104DQT-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 600MA 6TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,901
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Product details
Overview
MP2104DQT-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 via external resistor divider, and operating in 100% duty cycle for low-dropout Li+-battery-powered portable devices including smartphones and digital cameras.
For engineers reviewing the MP2104DQT-LF-Z datasheet, MP2104DQT-LF-Z pinout, MP2104DQT-LF-Z application, or MP2104DQT-LF-Z equivalent, key selection criteria include its 0.6V feedback reference, 1.7MHz fixed switching frequency, thermal shutdown at 145°C, <0.1μA shutdown current, and TQFN-6 package with exposed thermal pad tied to GND.
Technical Context
The MP2104DQT-LF-Z implements slope-compensated current-mode control with a 1.7MHz oscillator, enabling stable regulation and cycle-by-cycle peak current limiting. Its internal PFET/NFET power stage eliminates external Schottky diodes and supports continuous conduction mode across full load range.
It features an integrated 0.6V precision feedback reference, EN pin with 0.3V/0.96V/1.5V threshold hysteresis, and short-circuit protection that reduces switching frequency and PFET current limit during fault conditions before automatic recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.7MHz ±22% - Enables compact LC filter design with ≤10μH inductors and sub-10mm² total solution size. |
| Max Output Current | 600mA - Sustained delivery under 3.3VIN/1.8VOUT, limited by thermal resistance (θJA = 50°C/W) and internal PFET/NFET RDS(on). |
| Input Voltage Range | 2.5V to 6V - Matches single-cell Li-ion (2.7–4.2V) and dual-cell alkaline (3–6V) battery systems. |
| Feedback Reference | 0.600V ±2% - Sets output voltage via external resistor divider; enables 0.6V–6V programmability with <±1.5% line/load regulation. |
| Shutdown Current | <0.1μA - Achieved by pulling EN below 0.3V; critical for battery runtime extension in sleep modes. |
| Duty Cycle Range | 0–100% - Supports dropout operation where VIN ≈ VOUT; maintains regulation without foldback until PFET current limit (0.7–1.35A) is reached. |
| Thermal Shutdown | 145°C - Internal sensor disables switching until junction cools; protects against sustained overload or poor PCB thermal design. |
Pinout & Package
The MP2104DQT-LF-Z uses a 6-pin TQFN package (3mm × 3mm × 0.75mm) with exposed thermal pad connected to GND plane for optimal heat dissipation (θJC = 12°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Power Switch Node | Drain connection of internal PFET and NFET; drives external inductor; carries high di/dt switching current. |
| 2 & 6 (GND) | Ground Reference / Thermal Pad | Primary signal ground and thermal path; exposed pad must be soldered to ≥1cm² internal/external GND copper for θJA = 50°C/W. |
| 3 (EN) | Enable Control Input | Logic-level input: >0.96V enables regulator; <0.3V forces shutdown with <0.1μA quiescent draw. |
| 4 (FB) | Feedback Sense Input | Monitors voltage divider output; regulates VOUT to 0.6V reference; requires low-noise routing near IC. |
| 5 (IN) | Input Supply Rail | Connects to 2.5–6V source; requires ≥2.2μF X5R/X7R ceramic bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated NFET replaces Schottky diode, eliminating forward voltage drop and boosting efficiency to 95% at 200mA. |
| Current-Mode Control | Slope compensation prevents subharmonic oscillation above 50% duty cycle; ensures stability with wide input/output ratios. |
| Low Dropout Operation | 100% duty cycle capability maintains regulation when VIN − VOUT < 200mV, critical for end-of-battery-life operation. |
| Short-Circuit Recovery | Auto-reduces switching frequency and PFET current limit during output short; restores normal operation once FB rises to 0.6V. |
| Thermal Fault Protection | Junction temperature sensing triggers immediate shutdown at 145°C and holds off until safe cooldown, preventing permanent silicon damage. |
Applications
| Smartphone Core Rail | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Powering ARM Cortex-A series application processors requiring 1.0–1.2V @ 400mA from a 3.6V Li-ion battery. IC Role / Device Role / Timing Role: Primary DC/DC buck regulator providing dynamically scaled core voltage with fast transient response. Use Value: 1.7MHz switching enables use of 2.2μH inductors and 4.7μF ceramic output caps, reducing board area by >35% vs. 500kHz solutions. | Use Scenario: Supplying image sensor analog front-end (AFE) with ultra-low noise 2.8V bias from 3.3V system rail. IC Role / Device Role / Timing Role: High-efficiency, low-ripple step-down converter with tight load regulation (<±1.5%) across 10–600mA. Use Value: <0.1μA shutdown current extends standby time; 0.6V reference allows precise 2.8V setting using standard 1% resistors. |
| Portable Audio DAC Supply | Wearable MCU Subsystem |
Use Scenario: Generating clean 1.8V supply for high-resolution audio DAC in Bluetooth earbuds powered by 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Low-noise, high-PSRR buck converter minimizing switching artifacts in audio band (20Hz–20kHz). Use Value: Fixed 1.7MHz frequency avoids audible beat tones; thermal pad ensures stable operation at 60°C ambient inside sealed enclosure. | Use Scenario: Delivering 3.3V to ultra-low-power ARM Cortex-M0+ MCU and BLE radio in fitness tracker with 25mAh coin cell. IC Role / Device Role / Timing Role: Efficient point-of-load regulator supporting deep-sleep modes with <0.1μA quiescent draw. Use Value: 100% duty cycle sustains 3.3V output down to 3.4V input, extending usable battery life by ~12% versus non-dropout alternatives. |
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 |
|---|---|---|---|
| TPS62231DRYR | 2.25MHz switching, 0.6V reference, 600mA rating, but only 2.05–6.0V input range and no 100% duty cycle. | Not suitable for Li-ion discharge below 2.05V; lacks dropout support for end-of-life battery operation. | Select when higher frequency and smaller inductors are prioritized over low-VIN operation. |
| RT8059NGSP | 1.5MHz, 0.6V reference, 600mA, 2.5–5.5V input, but uses external compensation and lacks integrated thermal shutdown. | Requires additional loop compensation components; demands external thermal monitoring circuitry. | Select when BOM cost reduction outweighs layout simplicity and integrated protection. |
Compared with TPS62231DRYR and RT8059NGSP, the MP2104DQT-LF-Z uniquely combines 2.5V minimum input, 100% duty cycle, monolithic thermal shutdown, and TQFN-6 thermal performance-making it optimal for space-constrained, battery-critical portable designs where reliability and full discharge utilization are mandatory.
Availability
MP2104DQT-LF-Z is available at Aetrix Electronics and suitable for smartphone power management, digital camera sensor biasing, portable audio DAC supplies, and wearable MCU subsystems requiring stable component supply with guaranteed long-term sourcing.
Supply support for MP2104DQT-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.
The MP2104 product line targets ultra-compact, high-efficiency DC/DC conversion for battery-powered portable electronics, emphasizing minimal footprint, low quiescent current, and robust protection features.
FAQ
What is the minimum input voltage required for MP2104DQT-LF-Z to regulate 1.8V output?
The MP2104DQT-LF-Z maintains regulation down to 2.5V input for 1.8V output. Below this, UVLO (2.10–2.45V threshold) disables the device. At 2.5V input, 100% duty cycle enables continued operation until PFET current limit (0.7–1.35A) is reached, allowing functional margin during battery discharge.
Can MP2104DQT-LF-Z replace MP2104DJ-1.8 in an existing design?
No-MP2104DQT-LF-Z uses FB pin for adjustable output (0.6V–6V), while MP2104DJ-1.8 uses OUT pin with internal 1.8V divider. Swapping requires removing external resistors, relocating feedback network, and verifying loop stability; not a drop-in replacement.
How does the MP2104DQT-LF-Z achieve 95% efficiency?
95% efficiency results from synchronous rectification (eliminating Schottky VF loss), low RDS(on) PFET (0.44Ω) and NFET (0.29Ω), 1.7MHz operation minimizing core loss, and optimized gate drive reducing switching losses-all validated at 200mA load with 3.3VIN/1.8VOUT.
Is the exposed thermal pad on MP2104DQT-LF-Z electrically connected?
Yes-the exposed pad is internally connected to GND and must be soldered to a dedicated PCB GND plane. It serves both electrical grounding and thermal conduction; omitting this connection degrades θJA from 50°C/W to >100°C/W and risks thermal shutdown under 400mA load.
What happens during output short-circuit condition?
During short-circuit, the MP2104DQT-LF-Z reduces switching frequency and lowers PFET current limit to limit fault current. Once the short is removed and FB voltage recovers to 0.6V, it automatically resumes normal operation-no manual reset or power cycle required.
Does MP2104DQT-LF-Z require external compensation components?
No-the MP2104DQT-LF-Z uses internal compensation with a 17pF capacitor and optimized error amplifier. Only external R1/R2 feedback resistors are needed for output setting; no external poles/zeros or compensation network is required for stability.
What PCB layout practices maximize thermal performance?
Maximize thermal performance by soldering the exposed pad to ≥1cm² internal/external GND copper, placing IN and SW traces wide and short, routing FB away from noisy SW node, and using multiple thermal vias (≥4×0.3mm) under the pad to inner GND layers.
MP2104DQT-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- 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:
- 6-TQFN (3x3)
MP2104DQT-LF-Z FAQ
1.How can I place an order for MP2104DQT-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2104DQT-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 MP2104DQT-LF-Z reliable?
The price and inventory of MP2104DQT-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 MP2104DQT-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2104DQT-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2104DQT-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2104DQT-LF-Z?
MP2104DQT-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2104DQT-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 MP2104DQT-LF-Z?
For technical support, including MP2104DQT-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2104DQT-LF-Z requirements.
6.How does Aetrix verify that MP2104DQT-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2104DQT-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 MP2104DQT-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2104DQT-LF-Z?
All MP2104DQT-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2104DQT-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 MP2104DQT-LF-Z part is unused and in its original packaging.
Return procedure for MP2104DQT-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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