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Monolithic Power Systems Inc. MP6003DN-LF-P
- Part No.:
- MP6003DN-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP6003DN-LF-P.pdf
- Description:
- IC REG FLYBACK ADJ 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:4,743
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Product details
Overview
MP6003DN-LF-P from Monolithic Power Systems is a monolithic flyback/SEPIC DC-DC controller IC integrating a 150V/0.9Ω N-channel MOSFET, fixed-frequency peak-current-mode PWM architecture, and direct optocoupler interface for isolated output regulation. It delivers up to 15W output power, supports 10V–100V input range, and operates with programmable switching frequency (60–550 kHz) in telecom-grade industrial environments.
For engineers reviewing the MP6003DN-LF-P datasheet, MP6003DN-LF-P pinout, MP6003DN-LF-P application, or MP6003DN-LF-P equivalent, this device is selected for high-voltage isolated DC-DC conversion where cycle-by-cycle current limiting, line feed-forward duty-cycle control, zero-load regulation, and integrated thermal shutdown are required in compact SOIC8E packaging.
Technical Context
The MP6003DN-LF-P implements a fixed-frequency, peak-current-mode primary-side controller with internal slope compensation and programmable oscillator via RT pin. Its functional block includes a 100V startup circuit, line UV/OV detection (1.21V/3.0V thresholds), and error amplifier with 1.21V reference and 60dB DC gain.
It supports dual operating modes: primary-side feedback (via FB pin) and secondary-side optocoupler-coupled regulation (bypassing internal error amplifier). Duty cycle is dynamically limited with line feed-forward (DMAX = 67.5% at VLINE = 1.3V, decreasing linearly as VLINE rises), preventing transformer saturation under high-line conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +10V to +100V - Enables direct operation from PoE midspan, telecom -48V systems, or industrial 24–75V rails without pre-regulation. |
| Integrated Power Switch | 150V breakdown, 0.9Ω RDS(on) - Supports 15W output in flyback/SEPIC topologies with minimal external components and no external HV gate driver. |
| Switching Frequency Range | 60 kHz to 550 kHz - Set by external RT resistor; higher frequencies reduce transformer and capacitor size but increase AC losses. |
| Feedback Reference Voltage | 1.21V ±50mV - Precision internal bandgap reference enables stable output regulation across temperature and load. |
| Thermal Shutdown Threshold | 150°C with 30°C hysteresis - Protects die during overload or poor PCB thermal design; auto-recovery after cooldown. |
| Line UVLO/UVHYS | 1.21V threshold / 100mV hysteresis - Prevents erratic startup during brown-out; corresponds to ~10V input when using standard 10:1 divider. |
| Current Limit | 550–700 mA (typical) - Cycle-by-cycle peak current limiting ensures safe operation during short-circuit or overload events. |
Pinout & Package
MP6003DN-LF-P is housed in an 8-pin SOIC package with exposed thermal pad (SOIC8E), optimized for high-power density and thermal dissipation (θJA = 50°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power return and reference node | Primary ground reference for all internal circuits and external feedback network; must be low-impedance connection to thermal pad. |
| 2 LINE | UV/OV set point and enable input | Monitors input voltage via external resistor divider; grounding disables controller; 1.21V–3.0V window defines operational range. |
| 3 FB | Regulation feedback input | Inverting input of internal error amplifier; connected to voltage divider or optocoupler cathode for closed-loop output regulation. |
| 4 COMP | Error amplifier output | Drives external compensation network; source/sink capability (6.5mA/3.3mA) supports Type II compensation for stability. |
| 5 RT | Oscillator resistor and sync input | Connects to GND via resistor to set fSW; accepts external clock > fSW for synchronization in multi-rail systems. |
| 6 VCC | Supply bias voltage | Bias rail for internal circuitry; requires ≥1µF ceramic capacitor; clamped at 8V; powered via VIN startup or auxiliary winding. |
| 7 VIN | High-voltage startup supply | Provides initial charge current to VCC capacitor; enables operation from high-input rails without auxiliary supply. |
| 8 SW | Switching node | Drain of internal 150V MOSFET; connects directly to primary winding; carries high dv/dt and must be routed with minimal loop area. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100V startup circuit | Eliminates need for external high-voltage start-up resistor network, reducing component count and BOM cost in PoE and telecom designs. |
| Duty cycle limiting with line feed-forward | Prevents magnetic saturation at high input voltages by scaling DMAX inversely with VLINE, improving reliability across wide input ranges. |
| Direct optocoupler interface | Bypasses internal error amplifier to accept secondary-side feedback directly, enabling precise isolated output regulation without primary-side sensing. |
| Zero-load regulation with cycle skipping | Maintains tight output voltage regulation (<±5%) even at no-load, critical for always-on telecom and VoIP applications. |
| Auto-restart protection | Enters 15-cycle ramp-and-hold sequence upon open/shorted output fault, then initiates soft-start-prevents latch-up and enables self-recovery. |
Applications
| Telecom Power Supply | Voice over IP (VoIP) Terminal |
|---|---|
|
Use Scenario: Isolated 5V/2A power supply for DSLAM line cards operating from -48V DC input with strict efficiency and EMI requirements. IC Role / Device Role / Timing Role: Primary-side flyback controller managing transformer energy transfer, regulation, and protection functions. Use Value: Integrated 150V switch and line feed-forward enable single-chip solution across full -36V to -72V telecom range while maintaining <1% load regulation. |
Use Scenario: Compact wall-adapted power module for VoIP phones requiring isolated 3.3V/5V rails with low standby power and fast transient response. IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller providing cycle-by-cycle current limiting and zero-load regulation. Use Value: Built-in soft-start and auto-restart ensure reliable cold-start and recovery from cable disconnect events without system reset. |
| Power over Ethernet (PoE) PSE | Distributed Industrial DC-DC Converter |
|
Use Scenario: Auxiliary power converter in PoE midspan injectors delivering 12V/1A to powered devices over Category 5 cabling. IC Role / Device Role / Timing Role: SEPIC-mode controller regulating output despite wide input variation (36–57V) and high common-mode noise. Use Value: Direct optocoupler interface and 1.21V reference support accurate secondary-side regulation independent of transformer tolerance. |
Use Scenario: Board-mounted 24V-to-5V isolated converter for PLC I/O modules requiring reinforced insulation and 85°C ambient operation. IC Role / Device Role / Timing Role: High-voltage flyback controller with thermal shutdown and overvoltage protection for harsh industrial environments. Use Value: Exposed-pad SOIC8E package and 125°C max junction temperature rating ensure long-term reliability in convection-cooled enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flyback/SEPIC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28704DR | Lower 75V MOSFET rating; no integrated HV startup; requires external bias winding for VCC | Limited to ≤60V input; less suitable for telecom -48V systems with high line transients | Select when designing for lower-input industrial rails and external bias is acceptable. |
| LT3748IMS#PBF | Higher 200V MOSFET; no line feed-forward; uses valley-switching architecture instead of peak-current mode | Better EMI performance but less responsive to line transients; lacks zero-load cycle skipping | Prefer for ultra-low EMI medical or automotive applications where input range is narrower. |
Compared with UCC28704DR and LT3748IMS#PBF, MP6003DN-LF-P uniquely combines 150V integration, line feed-forward duty control, and zero-load regulation in SOIC8E-making it optimal for cost-sensitive, wide-input telecom and PoE auxiliary supplies where board space and thermal management are constrained.
Availability
MP6003DN-LF-P is available at Aetrix Electronics and suitable for telecom equipment, VoIP terminals, and Power over Ethernet (PoE) auxiliary power supplies requiring stable component supply, RoHS-compliant packaging, and long-lifecycle availability.
Supply support for MP6003DN-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 power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP6003 belongs to MPS's monolithic flyback/SEPIC controller product line, engineered for cost-effective, high-density isolated DC-DC conversion in telecom, industrial, and networking infrastructure where integration, thermal robustness, and protection features are critical.
FAQ
What is the maximum continuous output power achievable with MP6003DN-LF-P?
The MP6003DN-LF-P is rated for up to 15W continuous output power in properly designed flyback or SEPIC configurations. This assumes adequate PCB copper area for the exposed pad, ambient temperature ≤85°C, and thermal resistance θJA ≤50°C/W. Derating is required above 70°C ambient or with insufficient heatsinking.
Can MP6003DN-LF-P operate without an auxiliary winding for VCC bias?
Yes-the MP6003DN-LF-P integrates a 100V high-voltage startup circuit that charges the VCC capacitor directly from VIN, eliminating the need for an auxiliary winding during startup. Once running, VCC may be sustained by an auxiliary winding to improve efficiency, but it is not mandatory.
How does the LINE pin function in overvoltage and undervoltage protection?
The LINE pin monitors input voltage via an external resistor divider. When voltage at LINE falls below 1.21V (UVLO) or rises above 3.0V (OVLO), the controller disables the power switch and enters standby mode. Hysteresis (100mV UV, 300mV OV) prevents chatter during threshold crossings.
What is the purpose of the RT pin beyond setting switching frequency?
Beyond frequency programming via external resistor, the RT pin accepts synchronous clock signals (50–150ns pulse width, >fSW) for multi-converter phase alignment. This reduces input ripple and EMI in systems with multiple MP6003DN-LF-P controllers, such as redundant telecom power modules.
Does MP6003DN-LF-P support both primary-side and secondary-side feedback simultaneously?
No-it supports either primary-side regulation (via FB pin connected to primary winding voltage divider) or secondary-side regulation (via optocoupler cathode to FB, bypassing internal error amplifier), but not both concurrently. The COMP pin is used for compensation in either configuration, not signal combination.
What thermal derating applies when using the SOIC8E package without PCB copper pour?
Without dedicated thermal copper pour under the exposed pad, θJA degrades from 50°C/W to ≥80°C/W. At TA = 85°C, maximum continuous power drops from 2.5W (rated) to ≤1.2W-requiring significant output power reduction or forced-air cooling to avoid thermal shutdown.
Is the 1.21V feedback reference internally trimmed and stable over temperature?
Yes-the 1.21V reference is laser-trimmed during production and specified over -40°C to +85°C with ±50mV tolerance (1.16V–1.26V). It exhibits typical drift of <10ppm/°C and is buffered to minimize loading effects from external resistive dividers.
MP6003DN-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Flyback, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V, 10V
- Voltage - Input (Max):
- 6V, 100V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- 150V
- Current - Output:
- -
- Frequency - Switching:
- 60kHz ~ 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOICE
MP6003DN-LF-P FAQ
1.How can I place an order for MP6003DN-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP6003DN-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 MP6003DN-LF-P reliable?
The price and inventory of MP6003DN-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 MP6003DN-LF-P is usually 5 days.
3.What payment methods are accepted for MP6003DN-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6003DN-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP6003DN-LF-P?
MP6003DN-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP6003DN-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 MP6003DN-LF-P?
For technical support, including MP6003DN-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6003DN-LF-P requirements.
6.How does Aetrix verify that MP6003DN-LF-P is sourced from the original manufacturer or authorized distributors?
All MP6003DN-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 MP6003DN-LF-P meets industry standards.
7.What is the process for return or replacement of MP6003DN-LF-P?
All MP6003DN-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP6003DN-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 MP6003DN-LF-P part is unused and in its original packaging.
Return procedure for MP6003DN-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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