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Monolithic Power Systems Inc. MP2102DK-LF-P
- Part No.:
- MP2102DK-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MP2102DK-LF-P.pdf
- Description:
- IC REG BUCK ADJ 800MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,043
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Product details
Overview
MP2102DK-LF-P from Monolithic Power Systems is a dual-output, synchronous step-down DC-DC converter IC with integrated high-side and synchronous rectifier MOSFETs. It delivers up to 800mA per channel from 2.5V–6V input, regulates outputs down to 0.6V, operates at fixed 1.5MHz switching frequency, and features cycle-by-cycle current limiting and thermal shutdown-used in smart phones and portable instruments for dual-rail power management.
For engineers reviewing the MP2102DK-LF-P datasheet, MP2102DK-LF-P pinout, MP2102DK-LF-P application, or MP2102DK-LF-P equivalent, this page provides verified package mapping (MSOP-10), confirmed pin functions (e.g., FB1/FB2, EN1/EN2, PWROK), real-world efficiency curves (up to 95% at 800mA), and validated alternative options for dual-output buck conversion in Li+-powered systems.
Technical Context
The MP2102DK-LF-P implements peak current-mode PWM control with internal slope compensation, enabling stable operation at duty cycles >50% and fast transient response. Each channel uses independent feedback loops with 0.6V reference voltage and ±10% PWROK window monitoring.
It integrates P-channel high-side switches (0.4Ω RDS(on)) and N-channel synchronous rectifiers (0.3Ω RDS(on)), eliminating external Schottky diodes. Startup delay is programmable via DLY pin capacitor (e.g., 1nF → 0.5ms), and short-circuit protection activates valley-current limiting per channel.
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 portable devices. |
| Input Voltage Range | 2.5V to 6V - compatible with single-cell Li+ (2.7–4.2V) and boosted battery rails. |
| Feedback Reference | 0.600V ±2% - sets precise output regulation down to 0.6V using standard resistor dividers. |
| Shutdown Current | 1µA max - minimizes battery drain during system sleep modes. |
| Thermal Shutdown | 150°C junction - protects against sustained overload or poor PCB thermal layout. |
| PWROK Accuracy | ±10% output window - provides reliable power-good signaling for sequenced processor startup. |
Pinout & Package
MP2102DK-LF-P is housed in a RoHS-compliant, thermally enhanced 10-pin MSOP package (3.1mm × 4.9mm × 1.1mm), with exposed pad not present (unlike QFN variant). Pin 5 is GND; exposed thermal pad is absent-thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB1 | Output 1 Feedback Input | Connects to resistor divider on VOUT1; 0.6V reference sets regulated output voltage. |
| 2 EN1 | Channel 1 Enable Input | Active-high logic; internal 800kΩ pull-down ensures default disable; threshold 0.96–1.50V. |
| 3 VIN | Main Power Input | Supplies both channels; requires local 4.7µF ceramic bypass near pins 3 and 5. |
| 4 SW1 | Channel 1 Switch Node | Connects to inductor L1; high dv/dt node-must be routed short and away from FB traces. |
| 5 GND | Power & Signal Ground | Common return for VIN, SW1/SW2, FB1/FB2, and EN1/EN2; critical for noise immunity. |
| 6 SW2 | Channel 2 Switch Node | Connects to inductor L2; electrically isolated from SW1 but shares same ground return path. |
| 7 EN2 | Channel 2 Enable Input | Independent enable for second rail; identical specs to EN1-supports staggered power sequencing. |
| 8 PWROK | Open-Drain Power-Good Output | Pulled low if either VOUT1 or VOUT2 deviates >±10%; requires external pull-up to monitored rail. |
| 9 DLY | Programmable Delay Input | RC time constant (C4 × 0.8MΩ) sets PWROK assertion delay; 1nF → 0.5ms typical. |
| 10 FB2 | Output 2 Feedback Input | Independent regulation loop for VOUT2; matches FB1 electrical behavior and tolerance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent buck regulators | Enables simultaneous 1.8V/1.2V rails for SoC + memory without external controllers or sequencing ICs. |
| Synchronous rectification | Eliminates external Schottky diodes-reduces BOM count and improves full-load efficiency to ≥93%. |
| Internal slope-compensated current-mode control | Ensures stability across 0–90% duty cycle range without external compensation components. |
| Per-channel short-circuit protection | Valley-current limiting isolates fault on one output, preserving operation of the other channel. |
| Programmable PWROK delay | Allows synchronization of downstream logic reset timing with actual output settling-no extra timer IC needed. |
Applications
| Smart Phones | Digital Cameras |
|---|---|
Use Scenario: Dual-rail power for application processor (1.8V core) and image sensor interface (1.2V I/O). IC Role / Device Role / Timing Role: Primary dual-output DC-DC regulator managing independent voltage domains with coordinated PWROK signaling. Use Value: Reduces solution size vs. two discrete converters; 1.5MHz switching allows use of 2.2µH inductors <3mm × 3mm footprint. | Use Scenario: Powering CMOS image sensor (2.8V analog) and ISP core (1.2V digital) from single Li+ cell. IC Role / Device Role / Timing Role: Dual-buck controller delivering tightly regulated, low-noise supplies with independent enable control. Use Value: 0.6V feedback reference enables accurate 2.8V output via 300kΩ/121kΩ divider; <10mV load regulation supports clean analog imaging. |
| PDA Systems | Portable Instruments |
Use Scenario: Supplying 3.3V LCD bias and 1.5V microcontroller core from shared battery source. IC Role / Device Role / Timing Role: Dual-output step-down converter with independent EN1/EN2 for selective subsystem power gating. Use Value: 1µA shutdown current extends battery life during display-off states; thermal shutdown prevents damage during extended field use. | Use Scenario: Providing precision 2.5V ADC reference and 1.8V FPGA I/O bank from portable 4.2V battery pack. IC Role / Device Role / Timing Role: High-accuracy dual regulator with ±10mV FB reference tolerance and low-output-impedance ceramic-capable design. Use Value: 0.05%/mA load regulation ensures <10mV shift over 0–800mA load-critical for 12-bit measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2102DQ-LF-Z | Same die, QFN-10 (3mm × 3mm) with exposed thermal pad; θJA = 50°C/W vs. MSOP's 150°C/W. | Better thermal performance in space-constrained, high-ambient environments; requires solder paste under exposed pad. | Select when board layout allows QFN thermal vias and junction temperature exceeds 90°C at full load. |
| TPS65132A1YFFR | TI dual-output buck (1.2A/0.6A); 2.5–5.5V input; 0.6V ref; but no PWROK or DLY pin-requires external monitoring. | Lacks integrated power-good delay and per-channel short-circuit recovery; higher quiescent current (25µA). | Choose only if higher current per rail is required and system-level reset timing can be managed externally. |
Compared with MP2102DK-LF-P, the QFN variant offers superior thermal handling for continuous 800mA loads, while the TPS65132A1 trades integrated PWROK/DLY functionality for higher current asymmetry-making MP2102DK-LF-P optimal for compact, dual-rail Li+-powered systems requiring precise sequencing and fault isolation.
Availability
MP2102DK-LF-P is available at Aetrix Electronics and suitable for smart phone power management, portable instrumentation, and digital camera subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2102DK-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 mixed-signal ICs for power management, motion control, and automotive applications.
The MP2102 product line targets portable electronics requiring ultra-small, high-efficiency dual-output DC-DC conversion from single-cell Li+ batteries-with emphasis on integration, thermal robustness, and ease of layout.
FAQ
What is the maximum achievable output voltage for MP2102DK-LF-P?
The maximum output voltage is limited by duty cycle and switch losses. With 90% max duty cycle and typical RDS(on), VOUT ≤ 0.9 × VIN – 0.2V. At VIN = 6V, absolute max is ~5.2V; datasheet specifies 5.4V as safe operating limit with margin.
Can MP2102DK-LF-P operate with only one channel enabled?
Yes. EN1 and EN2 are fully independent. Disabling one channel (ENx = low) shuts down its associated switcher, reducing quiescent current to ~1µA total. The active channel continues regulation with no cross-talk or instability.
What is the recommended output capacitor ESR for stable operation?
No minimum ESR is required-the MP2102DK-LF-P is optimized for low-ESR ceramic capacitors (X5R/X7R). Typical design uses 10µF/0805 ceramics with ESR <10mΩ; higher ESR may degrade transient response and increase ripple.
How does the PWROK pin behave during startup and fault conditions?
PWROK is open-drain and pulled low during shutdown or if either output deviates >±10% from target. It floats (high) only when both outputs are within regulation window for ≥45µs after delay timer expires-ensuring valid power sequencing before host release.
Is the MP2102DK-LF-P pin-compatible with other MP2102 variants?
No. MP2102DK (MSOP-10) and MP2102DQ (QFN-10) share identical pin numbering and function but differ in package mechanicals and thermal pad presence. PCB layout and reflow profiles are not interchangeable between packages.
What is the minimum inductor value recommended for 800mA operation?
A 2.2µH inductor is recommended for 800mA loads at 1.5MHz. Lower values (e.g., 1µH) increase ripple current and peak switch stress; higher values (>4.7µH) improve light-load efficiency but slow transient response and require larger physical size.
Does MP2102DK-LF-P support forced PWM mode or enters PFM at light load?
It operates exclusively in PWM mode across all loads. There is no pulse-frequency modulation (PFM) or discontinuous conduction mode (DCM) transition-ensuring constant 1.5MHz switching, predictable EMI profile, and consistent transient response from zero to full load.
MP2102DK-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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-MSOP
MP2102DK-LF-P FAQ
1.How can I place an order for MP2102DK-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2102DK-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 MP2102DK-LF-P reliable?
The price and inventory of MP2102DK-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 MP2102DK-LF-P is usually 5 days.
3.What payment methods are accepted for MP2102DK-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2102DK-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2102DK-LF-P?
MP2102DK-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2102DK-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 MP2102DK-LF-P?
For technical support, including MP2102DK-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2102DK-LF-P requirements.
6.How does Aetrix verify that MP2102DK-LF-P is sourced from the original manufacturer or authorized distributors?
All MP2102DK-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 MP2102DK-LF-P meets industry standards.
7.What is the process for return or replacement of MP2102DK-LF-P?
All MP2102DK-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2102DK-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 MP2102DK-LF-P part is unused and in its original packaging.
Return procedure for MP2102DK-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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