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Monolithic Power Systems Inc. MP6003DN-LF
- Part No.:
- MP6003DN-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP6003DN-LF.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:2,387
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Product details
Overview
MP6003DN-LF from Monolithic Power Systems is a monolithic flyback/SEPIC DC-DC controller IC with integrated 150V/0.9Ω N-channel MOSFET, fixed-frequency peak-current-mode architecture, 60–550 kHz programmable switching frequency, and direct optocoupler interface for isolated regulation. It delivers up to 15W output power in telecom-grade PoE and distributed power supplies.
For engineers reviewing the MP6003DN-LF datasheet, MP6003DN-LF pinout, MP6003DN-LF application, or MP6003DN-LF equivalent, this page provides verified functional identity, thermal-enhanced SOIC8E package mapping, confirmed 8-pin terminal roles, real-world duty-cycle limiting behavior, and validated alternatives for flyback/SEPIC primary-side control in high-input-voltage industrial and VoIP systems.
Technical Context
The MP6003DN-LF implements a fixed-frequency, peak-current-mode PWM controller with internal slope compensation and line feed-forward duty-cycle limiting-reducing magnetic saturation risk at high input voltage. Its 100V startup circuit charges VCC from VIN, enabling operation from 10V–100V input while maintaining 4.5V–6.0V VCC regulation via internal hysteresis.
It features dual-loop protection: line UVLO (1.21V threshold) and OVLO (3.0V threshold) on the LINE pin, plus thermal shutdown at 150°C with 30°C hysteresis, cycle-by-cycle current limiting at 700 mA typical, and auto-restart after 15 failed soft-start cycles under open/shorted output conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Rating | 150V drain-source, 0.9Ω RDS(on) - supports 36–75V input flyback designs with <144V stress at full load |
| Frequency Range | 60–550 kHz via RT resistor - enables transformer size reduction while balancing AC losses in MOSFET and magnetics |
| Feedback Reference | 1.21V ±5% internal reference - sets output regulation accuracy for 5V/1A telecom supply with ±2% tolerance |
| Duty Cycle Limit | 67.5% max at 1.3V LINE, decreasing linearly - prevents core saturation during 100V input transients |
| VCC Operating Range | 4.5–6.0V with hysteresis - sustains bias from auxiliary winding without external LDO |
| Thermal Shutdown | 150°C junction, 30°C hysteresis - protects SOIC8E package under sustained 2.5W dissipation at +85°C ambient |
| Startup Current | 6.5 mA at VIN=20V - enables reliable start-up from 36V input using ≤1µF VCC capacitor |
Pinout & Package
MP6003DN-LF uses a thermally enhanced SOIC8E (SOIC-8 with exposed pad) package, optimized for high-voltage flyback converters requiring >2W dissipation in compact telecom modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power return and signal reference | Primary ground node for all internal circuits and external RC snubber return path |
| 2 LINE | Line monitor / enable input | UV/OV detection node; grounding disables controller; 1.21V–3.0V window enables operation |
| 3 FB | Inverting feedback input | Connects to optocoupler emitter or resistive divider; regulates output by comparing to 1.21V reference |
| 4 COMP | Error amplifier output | Drives external compensation network; source/sink capability supports Type II loop design |
| 5 RT | Oscillator timing / sync input | Resistor-to-GND sets frequency; accepts external clock pulses >50ns wide for synchronization |
| 6 VCC | Bias supply input | Internal regulator input; requires ≥1µF ceramic capacitor; clamped at 8V |
| 7 VIN | High-voltage startup supply | Charges VCC during startup; must exceed 10V for reliable turn-on; feeds internal 100V startup circuit |
| 8 SW | Power switch drain node | Connects to primary winding; carries 150V transient spikes; requires RC snubber for leakage clamp |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 150V/0.9Ω MOSFET | Eliminates external high-voltage switch and gate driver, reducing BOM count and layout area in 15W flyback designs |
| Direct optocoupler interface | Bypasses internal error amplifier to support isolated secondary-side regulation without compensation redesign |
| Programmable frequency with sync capability | Enables EMI spread-spectrum tuning and multi-converter synchronization in dense power modules |
| Line feed-forward duty-cycle limiting | Automatically reduces DMAX as input rises-prevents transformer saturation and improves line-transient immunity |
| Zero-load regulation via cycle skipping | Maintains stable 5V output at no-load without auxiliary winding or post-regulator, critical for PoE standby compliance |
Applications
| Telecom Power Supply | VoIP Phone Power |
|---|---|
Use Scenario: 36–75V input flyback converter delivering 5V/1A to baseband processor and Ethernet PHY in carrier-class access equipment. IC Role / Device Role / Timing Role: Primary-side controller managing MOSFET switching, optocoupler feedback, and line-monitoring for safety-critical isolation. Use Value: Integrated 150V switch and 67.5% DMAX limit prevent saturation during 100V surges per ITU-T K.20, meeting GR-1089 compliance. | Use Scenario: Compact wall-adapted PoE-powered VoIP phone with 5V/2A output, operating across -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller regulating isolated output via TL431 + PC817 optocoupler loop. Use Value: Zero-load cycle skipping maintains ±3% regulation at 0mA output, satisfying IEEE 802.3af Class 2 standby requirements. |
| Distributed Industrial PSU | LED Driver Control |
Use Scenario: DIN-rail mounted 24–80V input module powering 12V/0.5A sensors and PLC I/O in factory automation cabinets. IC Role / Device Role / Timing Role: SEPIC-mode controller providing non-inverting buck-boost conversion with single-inductor topology. Use Value: Programmable 200kHz frequency allows use of low-profile 22µH coupled inductor, reducing height to <12mm for space-constrained enclosures. | Use Scenario: High-voltage LED boost driver for industrial signage, accepting 36–80V input and driving 350mA string at 48V. IC Role / Device Role / Timing Role: Constant-voltage controller repurposed in boost configuration with external sense resistor and current shunt. Use Value: Internal 700mA current limit and thermal shutdown protect against LED open-circuit fault, eliminating need for external OCP circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flyback/SEPIC primary-side control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28700DR | Fixed-frequency quasi-resonant controller; no integrated MOSFET; requires external 200V FET | Lacks zero-load cycle skipping; needs auxiliary winding for no-load regulation | Preferred when higher efficiency >88% at light load is required and layout space allows discrete FET |
| LNK306G | Off-line switcher with integrated 700V MOSFET; operates in discontinuous conduction mode only | Supports universal AC input (85–265VAC); not rated for 100V DC bus applications | Only suitable if input is rectified AC; unsuitable for 36–100V DC telecom or PoE systems |
Compared with UCC28700DR and LNK306G, MP6003DN-LF uniquely combines 150V integrated switching, DC-input compatibility, and cycle-skipping zero-load regulation-making it the only option among the three qualified for 36–100V DC-powered telecom and industrial flyback designs requiring compactness and no-load stability.
Availability
MP6003DN-LF is available at Aetrix Electronics and suitable for telecom power supplies, VoIP phone adapters, and distributed industrial PSUs requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle continuity.
Supply support for MP6003DN-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 analog semiconductor company specializing in high-performance power management ICs, with over 20 years of leadership in DC-DC conversion, motor drivers, and LED lighting controllers.
The MP6003 belongs to MPS's monolithic flyback/SEPIC controller product line, designed specifically for cost-sensitive, high-reliability DC-input isolated power conversion in telecom infrastructure, enterprise VoIP, and industrial edge devices.
FAQ
What is the maximum continuous output power achievable with MP6003DN-LF?
The MP6003DN-LF is rated for up to 15W continuous output power in properly heatsinked SOIC8E layouts with adequate PCB copper area under the exposed pad. This assumes 36–75V input, 5V/3A output, 200kHz switching, and <125°C junction temperature. Derating is required above +70°C ambient due to θJA = 50°C/W.
Can MP6003DN-LF operate without an auxiliary winding for VCC bias?
Yes-MP6003DN-LF features a 100V high-voltage startup circuit that charges VCC directly from VIN, enabling operation without an auxiliary winding. However, for sustained full-load operation, an auxiliary winding is recommended to reduce power loss in the internal startup circuit and improve efficiency above 5W output.
How does the LINE pin function in overvoltage and undervoltage protection?
The LINE pin monitors input voltage via a resistor divider. When its voltage falls below 1.21V (UVLO) or rises above 3.0V (OVLO), the controller disables the power switch and enters standby mode. The 100mV UV hysteresis and 300mV OV hysteresis prevent chatter during slow input transitions, ensuring clean fault recovery.
Is MP6003DN-LF compatible with synchronous rectification?
No-MP6003DN-LF is a primary-side controller only and does not provide gate drive signals for secondary-side synchronous rectifiers. It is designed for use with Schottky or fast-recovery diodes on the secondary side. Synchronous rectification requires a dedicated secondary-side driver or a controller with SR control pins (e.g., MP6908).
What is the minimum recommended VCC bypass capacitance?
A minimum 1µF X7R ceramic capacitor is required between VCC and GND, placed as close as possible to the pin. This ensures stable bias during startup and transient load steps. Larger values (e.g., 2.2µF) improve ripple rejection but do not replace the need for proper PCB layout and ground plane integrity.
Does MP6003DN-LF support SEPIC topology out-of-the-box?
Yes-MP6003DN-LF is explicitly characterized for SEPIC boost operation in the datasheet. Its current-mode control, wide duty-cycle range (up to 67.5%), and ability to regulate with negative feedback polarity make it suitable for SEPIC without modification, provided the transformer/coupled inductor is replaced with two discrete inductors and appropriate output capacitor selection.
MP6003DN-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative, Isolation Capable
- Topology:
- Boost, Flyback, Forward Converter, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 10V
- Voltage - Input (Max):
- 100V
- Voltage - Output (Min/Fixed):
- -0.5V
- Voltage - Output (Max):
- 150V
- Current - Output:
- 550mA (Switch)
- Frequency - Switching:
- 60kHz ~ 550kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOICE
MP6003DN-LF FAQ
1.How can I place an order for MP6003DN-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP6003DN-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 MP6003DN-LF reliable?
The price and inventory of MP6003DN-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6003DN-LF is usually 5 days.
3.What payment methods are accepted for MP6003DN-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6003DN-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP6003DN-LF?
MP6003DN-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP6003DN-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 MP6003DN-LF?
For technical support, including MP6003DN-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6003DN-LF requirements.
6.How does Aetrix verify that MP6003DN-LF is sourced from the original manufacturer or authorized distributors?
All MP6003DN-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 MP6003DN-LF meets industry standards.
7.What is the process for return or replacement of MP6003DN-LF?
All MP6003DN-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP6003DN-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 MP6003DN-LF part is unused and in its original packaging.
Return procedure for MP6003DN-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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