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Monolithic Power Systems Inc. MP2102DQ-LF-Z
- Part No.:
- MP2102DQ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP2102DQ-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 800MA DL 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,668
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Product details
Overview
MP2102DQ-LF-Z from Monolithic Power Systems is a dual-output, synchronous step-down DC-DC converter with integrated high-side and synchronous rectifier MOSFETs, delivering up to 800mA per channel from 2.5V–6V input. It operates at a fixed 1.5MHz switching frequency, regulates outputs down to 0.6V, and features cycle-by-cycle current limiting and thermal shutdown. It powers dual-rail subsystems in Li+-battery-powered portable instruments.
For engineers reviewing the MP2102DQ-LF-Z datasheet, MP2102DQ-LF-Z pinout, MP2102DQ-LF-Z application, or MP2102DQ-LF-Z equivalent, key selection criteria include dual-channel 800mA capability, QFN10 (3×3mm) package with exposed thermal pad, ±10% PWROK monitoring accuracy, 1.5MHz constant-frequency operation, and internal compensation enabling ceramic capacitor stability.
Technical Context
The MP2102DQ-LF-Z implements peak-current-mode PWM control with slope compensation for stable operation above 50% duty cycle. Each channel uses independent feedback loops with 0.6V reference voltage and internal error amplifiers, supporting output adjustment via external resistor dividers.
It integrates two P-channel main switches (0.4Ω typical RDS(on)) and two N-channel synchronous rectifiers (0.3Ω typical RDS(on)), eliminating external Schottky diodes. The open-drain PWROK pin asserts low when either output deviates beyond ±10% of target, and startup delay is programmable via external capacitor on DLY pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.5MHz fixed - enables compact LC filter design with ≤2.2µH inductors and 10µF ceramic output caps. |
| Max Output Current | 800mA per channel - supports dual-core processors or baseband + RF rails in handheld devices. |
| Input Voltage Range | 2.5V to 6V - compatible with single-cell Li+ (2.7–4.2V) and boosted battery or USB-supplied systems. |
| Feedback Reference | 0.600V ±2% - sets minimum output to 0.6V; allows precise regulation of core logic (1.2V) and I/O (1.8V/2.5V) rails. |
| Shutdown Current | 1µA max - preserves battery life during system sleep modes without external enable sequencing. |
| Thermal Shutdown | 150°C junction - protects against sustained overload or poor PCB thermal design in sealed enclosures. |
| PWROK Accuracy | ±10% output window - provides reliable power-good signaling for microcontroller reset coordination. |
Pinout & Package
MP2102DQ-LF-Z is housed in a 10-pin QFN package (3mm × 3mm, 0.5mm pitch) with an exposed thermal pad that must be soldered to a PCB ground plane for optimal thermal performance (θJA = 50°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB1 | Output 1 feedback input | Connects to resistor divider from VOUT1; sets regulation point at 0.6V reference. |
| 2 EN1 | Channel 1 enable input | Active-high; internal 800kΩ pull-down ensures default disable; threshold 0.96V min. |
| 3 VIN | Main input supply | Accepts 2.5–6V; shared by both channels; requires local 4.7µF ceramic decoupling. |
| 4 SW1 | Channel 1 switch node | Connects to inductor L1; high dv/dt node requiring short, low-inductance routing. |
| 5 GND | Power and signal ground | Common return; exposed pad must be connected to solid ground plane for thermal and EMI control. |
| 6 SW2 | Channel 2 switch node | Connects to inductor L2; electrically isolated from SW1 but shares VIN/GND paths. |
| 7 EN2 | Channel 2 enable input | Independent of EN1; enables asymmetric power sequencing (e.g., core before I/O). |
| 8 PWROK | Open-drain power-good output | Pulled low if either VOUT1 or VOUT2 deviates >±10%; requires external pull-up. |
| 9 DLY | Programmable delay input | RC time constant (C4 × 0.8MΩ) sets PWROK assertion delay; 1nF → 0.5ms. |
| 10 FB2 | Output 2 feedback input | Independent regulation loop; supports different VOUT2 setting than VOUT1. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent buck regulators | Enables simultaneous 1.2V/1.8V or 1.8V/2.5V rail generation from single Li+ cell without discrete controllers. |
| Integrated synchronous MOSFETs | Eliminates external Schottky diodes; achieves up to 95% efficiency at 800mA, reducing board area and thermal load. |
| Internal compensation | Supports stable operation with only ceramic capacitors and small inductors-no type-II/type-III compensation network required. |
| Programmable PWROK delay | Allows synchronization of system reset timing with slow-starting peripherals via external capacitor on DLY pin. |
| Cycle-by-cycle current limit | Protects internal switches during overload or short-circuit events without latch-off; recovers automatically when fault clears. |
Applications
| DVD+/-RW Drive | Smart Phones |
|---|---|
Use Scenario: Dual-rail power for laser diode driver (3.3V) and servo controller (1.8V) in optical disc drives. IC Role / Device Role / Timing Role: Primary dual-output DC-DC regulator managing independent voltage domains with coordinated power-good signaling. Use Value: Enables single-chip solution replacing two discrete converters, reducing BOM count and layout complexity while meeting tight ripple (<20mV) requirements. | Use Scenario: Supplying application processor core (1.2V) and memory interface (1.8V) from single Li+ battery. IC Role / Device Role / Timing Role: System power management IC providing sequenced, regulated rails with PWROK-driven SoC reset coordination. Use Value: Delivers 800mA/channel at >90% efficiency across 2.7–4.2V battery range, extending talk time and minimizing thermal dissipation in thin form factors. |
| PDAs | Digital Cameras |
Use Scenario: Powering ARM CPU (1.3V) and LCD backlight driver (3.3V) in handheld PDAs with dynamic load profiles. IC Role / Device Role / Timing Role: Dual-channel step-down converter with independent enable inputs enabling flexible power sequencing and dynamic rail scaling. Use Value: Supports rapid enable/disable of non-critical rails during UI transitions, reducing average system current by >30% in standby. | Use Scenario: Generating sensor analog rail (2.8V) and image processor core rail (1.2V) in compact digital cameras. IC Role / Device Role / Timing Role: Compact, thermally efficient dual-buck regulator operating from 3.6V nominal battery input. Use Value: QFN10 package with exposed pad maintains junction temperature <105°C at full load in 50°C ambient, ensuring reliability during burst capture mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2102DK-LF-Z | Same silicon die, packaged in 10-pin MSOP (θJA = 150°C/W); larger footprint, no exposed thermal pad. | Better suited for prototyping or low-volume designs where thermal performance is less critical and hand-soldering is preferred. | Select DK variant only when QFN reflow capability is unavailable; expect ~30°C higher junction temp at full load vs. DQ. |
| TPS62400DRVR | TI dual 600mA buck; 2.25–6.5V input; 2.2MHz switching; separate PG pins; no programmable PWROK delay. | Requires external resistors for PG assertion timing; lacks DLY pin flexibility for custom reset sequencing. | Choose TPS62400 only if higher frequency (2.2MHz) and separate PG signals are mandatory; accept reduced max current per channel (600mA vs. 800mA). |
Compared with MP2102DK-LF-Z, the MP2102DQ-LF-Z delivers superior thermal performance and smaller footprint, while the TPS62400DRVR offers higher switching frequency but lower current rating and inflexible power-good timing-making MP2102DQ-LF-Z optimal for space-constrained, thermally demanding dual-rail Li+ applications.
Availability
MP2102DQ-LF-Z is available at Aetrix Electronics and suitable for DVD+/-RW drives, smart phones, and portable instrumentation requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MP2102DQ-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 MP2102 belongs to MPS's high-frequency synchronous buck converter product line, engineered specifically for space- and efficiency-critical battery-powered portable electronics requiring dual regulated rails.
FAQ
What is the maximum achievable output voltage for each channel of the MP2102DQ-LF-Z?
The maximum output voltage is limited by the maximum duty cycle (~90%) and internal switch voltage drops. With a 6V input, the theoretical maximum is approximately 5.4V, and the datasheet confirms adjustable output range from 0.6V to 5.4V using external feedback resistors-verified across temperature and load conditions.
Does the MP2102DQ-LF-Z require external compensation components?
No. The MP2102DQ-LF-Z features fully internal compensation optimized for ceramic output capacitors. Stability is achieved with standard 10µF X5R/X7R ceramics and 2.2µH inductors-no external type-II or type-III compensation network is needed, simplifying layout and reducing BOM count.
How does the PWROK pin behave during startup and fault conditions?
PWROK is an open-drain output pulled low during shutdown and when either output falls outside ±10% of its target. It floats (high) only after both outputs stabilize within tolerance and the DLY-programmed delay expires-confirmed by oscilloscope waveforms showing clean assertion after 0.5ms with 1nF capacitor.
Can EN1 and EN2 be driven independently, and what is their voltage threshold?
Yes. EN1 and EN2 are independent active-high enables with internal 800kΩ pull-down resistors. Their trip threshold is 0.96V (min) over temperature, allowing direct interfacing with 1.8V or 3.3V GPIOs without level-shifting-validated in electrical characteristics tables across –40°C to +85°C.
What thermal derating applies when operating at 6V input and 800mA per channel?
At 6V input and full 800mA load per channel, power dissipation reaches ~1.6W. With θJA = 50°C/W and 70°C ambient, junction temperature rises to ~150°C-the thermal shutdown threshold. Derating to 600mA per channel reduces dissipation to ~1.0W, maintaining TJ < 120°C with adequate copper area.
Is the MP2102DQ-LF-Z pin-compatible with other MP2102 variants like MP2102DK-LF-Z?
No. MP2102DQ-LF-Z uses a 10-pin QFN (3×3mm) package with different pinout and thermal pad layout, while MP2102DK-LF-Z uses a 10-pin MSOP with distinct mechanical dimensions and lead configuration-PCB footprints and land patterns are not interchangeable.
What is the recommended input capacitor value and type for MP2102DQ-LF-Z?
A 4.7µF X7R or X5R ceramic capacitor placed adjacent to VIN and GND pins is recommended. This value suppresses high-frequency switching noise and limits surge current-confirmed in the Applications Information section and validated in typical performance plots showing stable operation up to 1.5MHz.
MP2102DQ-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN 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:
- 2
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.4V
- Current - Output:
- 800mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP2102DQ-LF-Z FAQ
1.How can I place an order for MP2102DQ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2102DQ-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 MP2102DQ-LF-Z reliable?
The price and inventory of MP2102DQ-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 MP2102DQ-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2102DQ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2102DQ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2102DQ-LF-Z?
MP2102DQ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2102DQ-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 MP2102DQ-LF-Z?
For technical support, including MP2102DQ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2102DQ-LF-Z requirements.
6.How does Aetrix verify that MP2102DQ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2102DQ-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 MP2102DQ-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2102DQ-LF-Z?
All MP2102DQ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2102DQ-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 MP2102DQ-LF-Z part is unused and in its original packaging.
Return procedure for MP2102DQ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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