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Monolithic Power Systems Inc. MP2102DK-LF
- Part No.:
- MP2102DK-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MP2102DK-LF.pdf
- Description:
- IC REG BUCK ADJ 800MA DL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,842
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Product details
Overview
MP2102DK-LF from Monolithic Power Systems is a dual-output, synchronous step-down DC-DC converter optimized for Li-ion battery-powered portable electronics. 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 integrates high-side PFET and synchronous NFET switches-enabling compact, high-efficiency power rails in smartphones and digital cameras.
For engineers reviewing the MP2102DK-LF datasheet, MP2102DK-LF pinout, MP2102DK-LF application, or MP2102DK-LF equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, real-world application cards, and two rigorously cross-checked alternative parts with documented functional differences.
Technical Context
The MP2102DK-LF implements peak current-mode PWM control with internal slope compensation, enabling stable operation across duty cycles up to ~90% without external compensation components. Its dual independent buck channels share a single 1.5MHz oscillator but feature separate EN1/EN2 controls, FB1/FB2 feedback inputs, and SW1/SW2 switch nodes-allowing asynchronous enable/disable and independent output voltage programming.
Each channel integrates a 0.4Ω PFET main switch and 0.3Ω NFET synchronous rectifier, eliminating external Schottky diodes. Protection includes cycle-by-cycle overcurrent limiting (1.5A typ), thermal shutdown at 150°C, input UVLO (2.0V typ with 100mV hysteresis), and open-drain PWROK monitoring with ±10% output tolerance window and programmable startup delay via external capacitor on DLY pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - supports single-cell Li-ion (2.7–4.2V) with margin for cold start and full-charge conditions. |
| Output Current per Channel | 800mA continuous - sufficient for core logic and I/O rails in portable SoC applications. |
| Switching Frequency | 1.5MHz (typ) - enables use of small 2.2µH inductors and 10µF ceramic output capacitors. |
| Feedback Reference Voltage | 0.600V (±2%) - sets output voltage via external resistor divider; enables 0.6V–5.4V regulation range. |
| Shutdown Current | 1µA max - preserves battery life during system sleep modes. |
| Thermal Shutdown Threshold | 150°C - protects die under sustained overload or poor PCB thermal design. |
| PWROK Accuracy Window | ±10% of nominal VOUT - provides reliable power-good signaling for sequenced processor boot. |
Pinout & Package
MP2102DK-LF is housed in a 10-pin MSOP package (3.0mm × 4.9mm, 0.5mm pitch) with exposed thermal pad connected internally to GND. The package supports standard reflow profiles and offers θJA = 150°C/W on 1"² 1oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB1 | Feedback Input 1 | High-impedance input sensing VOUT1 via resistor divider; connects to error amplifier reference node. |
| 2 EN1 | Enable Input 1 | Logic-level input (0.98V threshold) with internal 0.8MΩ pull-down; controls Channel 1 independently. |
| 3 VIN | Power Input | Primary supply rail for both channels; requires local 4.7µF ceramic decoupling near pin. |
| 4 SW1 | Switch Node 1 | Drain of integrated PFET and source of NFET; connects directly to inductor L1 and output capacitor C2. |
| 5 GND | Ground Reference | Common return for power, control, and feedback paths; must be low-impedance plane tied to exposed pad. |
| 6 SW2 | Switch Node 2 | Drain of integrated PFET and source of NFET for Channel 2; connects to L2 and C3. |
| 7 EN2 | Enable Input 2 | Independent logic-level enable for Channel 2; identical threshold and pull-down as EN1. |
| 8 PWROK | Power-On Reset Output | Open-drain output pulled low if either VOUT1 or VOUT2 deviates >±10%; floats when both are in regulation. |
| 9 DLY | Delay Set | Connects to external capacitor (e.g., 1nF → 0.5ms delay) to program PWROK assertion timing after enable. |
| 10 FB2 | Feedback Input 2 | High-impedance input for VOUT2 regulation; electrically isolated from FB1 for independent output control. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent buck regulators | Two fully separate 800mA channels with dedicated EN, FB, and SW pins-enables staggered power sequencing and mixed-voltage domain support. |
| Integrated synchronous rectification | 0.3Ω NFET rectifier per channel eliminates external Schottky diode losses, achieving up to 95% efficiency at mid-load. |
| Stable with ceramic output capacitors | Internal Type II compensation and peak-current-mode control allow stable loop response using low-ESR X5R/X7R ceramics (≥10µF). |
| Programmable PWROK delay | Startup reset timing set by external capacitor on DLY pin (e.g., 1nF = 0.5ms), enabling precise coordination with host processor boot requirements. |
| Robust fault protection | Cycle-by-cycle current limit (1.5A typ), thermal shutdown, input UVLO, and short-circuit recovery ensure safe operation under transient faults. |
Applications
| Smartphone Core & I/O Rails | Digital Camera Sensor & ISP Supplies |
|---|---|
|
Use Scenario: Powering application processor core (1.2V), memory interface (1.8V), and USB PHY (3.3V) from single Li-ion cell. IC Role / Device Role / Timing Role: Dual-channel PMIC providing tightly regulated, sequenced, and monitored DC supplies with independent enable control. Use Value: Eliminates need for discrete regulators and external power-good logic; reduces BOM count and PCB area while ensuring safe boot sequence. |
Use Scenario: Supplying image sensor analog bias (2.8V), digital ISP core (1.2V), and flash LED driver (5V) in compact camera module. IC Role / Device Role / Timing Role: Dual synchronous buck delivering low-noise, high-efficiency rails with PWROK confirmation before sensor initialization. Use Value: Enables fast, reliable camera startup with coordinated voltage ramp and fault detection-critical for low-latency capture. |
| DVD±RW Drive Motor & Laser Diode | Portable Medical Instrument Front-End |
|
Use Scenario: Generating 3.3V for servo motor control and 1.8V for laser diode driver IC in battery-operated optical drive. IC Role / Device Role / Timing Role: High-frequency dual regulator minimizing EMI near sensitive analog circuits; PWROK ensures motor enable only after stable supply. Use Value: Reduces conducted noise into motor drivers and laser bias paths-improving read/write accuracy and reducing jitter. |
Use Scenario: Providing isolated 3.3V ADC reference and 1.2V microcontroller core supply in handheld ECG or glucose meter. IC Role / Device Role / Timing Role: Low-quiescent, thermally robust dual converter meeting medical-grade reliability and battery runtime targets. Use Value: 1µA shutdown current extends battery life between measurements; thermal shutdown prevents unsafe operation during extended use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2143DQ-LF | Higher 2A per channel, 2MHz switching, smaller QFN20 package; lacks PWROK and DLY pins. | Requires external power-good circuitry; better suited for higher-current, space-constrained designs where sequencing is handled externally. | Select when load current exceeds 800mA or board area is critical; avoid if PWROK-driven sequencing is required. |
| TPS65132A1YFFR | Single-input, dual-output with integrated LDO post-regulator; 1.2MHz, 600mA per buck; includes I²C interface. | Supports dynamic voltage scaling via I²C; LDO stage improves PSRR for noise-sensitive analog rails. | Select when system requires programmable output voltages or ultra-low noise on one rail; not drop-in due to different control interface. |
Compared with MP2102DK-LF, MP2143DQ-LF trades built-in power sequencing for higher current and density, while TPS65132A1YFFR adds programmability and noise filtering at the cost of complexity and external component count-making MP2102DK-LF optimal for cost-sensitive, fixed-rail portable systems needing simple, reliable dual-buck operation.
Availability
MP2102DK-LF is available at Aetrix Electronics and suitable for smartphone power management, digital camera DC-DC conversion, and portable instrumentation requiring stable component supply across production lifecycles.
Supply support for MP2102DK-LF 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 expertise in DC-DC conversion, motor drivers, and LED lighting controllers.
The MP2102 product line targets portable battery-powered systems requiring compact, efficient, and highly integrated dual-output power solutions-designed specifically for Li-ion voltage ranges and stringent size constraints in consumer electronics.
FAQ
What is the maximum achievable output voltage for each channel?
The MP2102DK-LF supports output voltages from 0.6V to 5.4V, limited by the internal 0.6V reference and external resistor divider. Due to ~90% maximum duty cycle and switch RDS(on), the practical upper bound is approximately 90% of VIN minus IR drops-so at VIN = 6V, 5.4V is achievable only with light loads and low-resistance layout.
Can MP2102DK-LF operate with only one channel enabled?
Yes. EN1 and EN2 are independent logic inputs with internal 0.8MΩ pull-down resistors. Either channel can be disabled while the other remains active-no interaction between channels occurs in shutdown mode, and quiescent current remains near 750µA for the enabled channel.
How is the PWROK signal asserted, and what triggers its deassertion?
PWROK is an open-drain output that floats (high-impedance) when both FB1 and FB2 voltages are within ±10% of 0.6V. It is actively pulled low if either feedback voltage falls outside that window-or during shutdown. The DLY pin capacitor sets the delay from EN assertion to PWROK release (e.g., 1nF = 0.5ms).
What thermal considerations apply to the MSOP10 package?
The MP2102DK-LF in MSOP10 has θJA = 150°C/W. At 800mA per channel and 3.6V input, typical power dissipation is ~350mW per channel. With 70°C ambient, junction temperature rises ~52°C-well below the 150°C shutdown threshold. However, full-load operation above 50°C ambient requires careful copper pour and thermal vias under the exposed pad.
Is external compensation required for stability?
No. The MP2102DK-LF uses internal Type II compensation optimized for ceramic output capacitors ≥10µF. Stability is guaranteed with recommended 2.2µH inductors and X5R/X7R ceramics-no external compensation network is needed, simplifying layout and reducing component count.
What is the minimum input voltage for 800mA operation on both channels?
While the absolute minimum input is 2.5V, full 800mA per channel is only guaranteed down to ~2.8V due to increased conduction loss in the PFET/NFET pair at low VIN. Below 2.8V, maximum load current decreases progressively-e.g., at 2.5V input, derated output current is ~600mA per channel to maintain thermal safety.
Does MP2102DK-LF support forced PWM or power-save mode?
No. The MP2102DK-LF operates exclusively in fixed-frequency PWM mode across all load conditions. It does not include pulse-skipping or burst-mode capability-ensuring constant switching frequency for predictable EMI, but with higher light-load quiescent current than adaptive-mode converters.
MP2102DK-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
MP2102DK-LF FAQ
1.How can I place an order for MP2102DK-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2102DK-LF 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 reliable?
The price and inventory of MP2102DK-LF 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 is usually 5 days.
3.What payment methods are accepted for MP2102DK-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2102DK-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2102DK-LF?
MP2102DK-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2102DK-LF 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?
For technical support, including MP2102DK-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2102DK-LF requirements.
6.How does Aetrix verify that MP2102DK-LF is sourced from the original manufacturer or authorized distributors?
All MP2102DK-LF 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 meets industry standards.
7.What is the process for return or replacement of MP2102DK-LF?
All MP2102DK-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP2102DK-LF, 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 part is unused and in its original packaging.
Return procedure for MP2102DK-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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