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Monolithic Power Systems Inc. MP6003DN-LF-Z
- Part No.:
- MP6003DN-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP6003DN-LF-Z.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:2,398
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Product details
Overview
MP6003DN-LF-Z from Monolithic Power Systems is a monolithic flyback/SEPIC DC-DC converter IC with an integrated 150V/0.9Ω N-channel MOSFET power switch, fixed-frequency peak-current-mode control, and direct optocoupler interface for isolated output regulation. It delivers up to 15W output power, supports 10V–100V input range, and operates from –40°C to +85°C in SOIC8E package. It is used in telecom power supplies and PoE-powered devices.
For engineers reviewing the MP6003DN-LF-Z datasheet, MP6003DN-LF-Z pinout, MP6003DN-LF-Z application, or MP6003DN-LF-Z equivalent, key selection criteria include its 150V internal switch rating, programmable 60–550kHz switching frequency, line UV/OV protection thresholds (1.21V/3.0V), zero-load regulation capability, and thermal shutdown at 150°C.
Technical Context
The MP6003DN-LF-Z implements a fixed-frequency, peak-current-mode PWM controller with single-ended primary-side architecture. Its functional block includes an internal error amplifier (1.21V reference), slope compensation, cycle-by-cycle current limiting, and line feed-forward duty-cycle limiting that reduces DMAX from 67.5% at 1.3V LINE to lower values as input voltage rises.
It integrates a 100V high-voltage startup circuit sourcing bias from VIN to charge VCC, with auto-restart triggered by VCC ramping between 4.5V and 6.0V. The LINE pin serves dual roles: input voltage monitoring (UVLO/ OVLO) and remote enable/disable via grounding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +10V to +100V - supports wide-range telecom and industrial DC inputs without external pre-regulation |
| Internal Switch Rating | 150V / 0.9Ω - enables direct operation from 75V DC bus with margin for leakage spike |
| Switching Frequency | 60kHz to 550kHz - set by RT resistor; higher frequencies reduce transformer and capacitor size but increase AC losses |
| Feedback Reference | 1.21V ±50mV - precise internal bandgap reference enabling stable output regulation across temperature |
| Thermal Shutdown | 150°C with 30°C hysteresis - protects die during overload or poor heatsinking; automatic recovery after cooldown |
| Line UV/OV Thresholds | UVLO = 1.21V ±50mV, OVLO = 3.0V ±150mV - configured via resistive divider on LINE pin for input fault protection |
| Zero-Load Regulation | Enabled via cycle-skipping - maintains output voltage stability down to 0mA load without auxiliary winding or post-regulator |
Pinout & Package
MP6003DN-LF-Z is housed in a thermally enhanced SOIC8E (SOIC-8 with exposed pad) package, optimized for high-voltage DC-DC conversion in space-constrained telecom and industrial applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power return and reference node | Primary ground reference for all internal circuits and external feedback network; must be low-impedance connection to PCB ground plane |
| LINE (Pin 2) | UV/OV detection and enable input | Accepts resistive divider from VIN; grounding disables controller; 1.21V–3.0V window defines operational input range |
| FB (Pin 3) | Inverting input of error amplifier | Compares feedback signal against 1.21V internal reference; supports direct optocoupler connection for isolated outputs |
| COMP (Pin 4) | Error amplifier output | Drives external compensation network (Type II); source/sink capability (6.5mA/3.3mA) enables robust loop stability |
| RT (Pin 5) | Oscillator frequency setting and sync input | Connects to GND via resistor to set fSW; accepts external clock > fSW for synchronization |
| VCC (Pin 6) | Bias supply rail | Internally clamped at 8V; requires ≥1µF capacitor to GND; powered initially from VIN startup circuit |
| VIN (Pin 7) | High-voltage startup supply | Sources initial bias current to charge VCC; must exceed 10V for reliable startup; disconnected once VCC reaches 6.0V |
| SW (Pin 8) | Power switch drain node | Connects to primary winding of flyback/SEPIC transformer; carries full switching current and high-voltage transients |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 150V/0.9Ω MOSFET | Eliminates need for external high-voltage switch and gate driver, reducing BOM count and layout complexity in flyback/SEPIC designs |
| Direct optocoupler interface | Bypasses internal error amplifier to support isolated secondary-side regulation without additional compensation components |
| Programmable switching frequency | Enables optimization of magnetic size vs. efficiency trade-off across 60–550kHz; supports synchronization to system clock |
| Duty-cycle limiting with line feed-forward | Prevents transformer saturation at high line by dynamically reducing DMAX-critical for wide-input-range telecom supplies |
| Auto-restart with 15-cycle timeout | Enters soft-start after 15 failed restart attempts during open/shorted output faults, preventing latch-up and enabling self-recovery |
Applications
| Telecom Power Supply | Power over Ethernet (PoE) PD |
|---|---|
Use Scenario: 48V DC input converted to isolated 5V/3.3V for base station control logic and interface circuitry. IC Role / Device Role / Timing Role: Primary-side flyback controller managing isolation, regulation, and protection in offline telecom power module. Use Value: Integrated 150V switch and line UV/OV protection ensure reliable operation across fluctuating -48V telecom bus voltages with brownout and surge immunity. | Use Scenario: Powered Device (PD) receiving power over Category 5/6 Ethernet cable with input ranging from 37V to 57V. IC Role / Device Role / Timing Role: Flyback controller regulating isolated 3.3V/5V rails for Ethernet PHY, MCU, and sensors in VoIP phones or IP cameras. Use Value: Zero-load regulation and cycle-skipping maintain tight output voltage under standby conditions where PoE link is active but device is idle. |
| Distributed Industrial DC-DC | High-Voltage LED Driver |
Use Scenario: 24–72V DC distribution bus powering isolated 12V/15V rails for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: SEPIC or flyback controller providing non-inverting, isolated step-down conversion with input transient tolerance. Use Value: Duty-cycle limiting with line feed-forward ensures stable operation across wide input range while avoiding magnetic saturation in compact transformers. | Use Scenario: Constant-current LED driver for industrial signage or machine vision lighting using 36–80V input. IC Role / Device Role / Timing Role: Boost controller driving high-brightness LED strings with precise current regulation via secondary-side sensing. Use Value: Direct optocoupler interface enables accurate current feedback across isolation barrier, improving long-term LED brightness consistency and thermal stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flyback/SEPIC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28740DR | Fixed-frequency quasi-resonant controller with 650V integrated FET; no internal 100V startup circuit; requires external bias winding | Targets higher-efficiency, lower EMI designs with valley-switching; not suitable for direct high-line startup without auxiliary supply | Select when EMI compliance is critical and auxiliary winding is available; avoid if single-supply startup from 10–100V is required |
| LT3748IMS#TRPBF | Isolated flyback controller with no integrated power switch; requires external 150V+ MOSFET; supports boundary conduction mode | Offers greater flexibility in power stage design and thermal management; supports higher power than 15W with discrete switch selection | Select when >15W output or discrete switch optimization (e.g., SiC) is needed; avoid if BOM reduction and SOIC8 footprint are priorities |
Compared with UCC28740DR and LT3748, MP6003DN-LF-Z uniquely combines 150V integrated switch, 100V startup circuit, and direct optocoupler interface in SOIC8E-enabling compact, single-chip flyback/SEPIC solutions for 10–100V input telecom and PoE applications without auxiliary bias or external FET.
Availability
MP6003DN-LF-Z is available at Aetrix Electronics and suitable for telecom equipment, Power over Ethernet (PoE) powered devices, and distributed industrial DC-DC conversion requiring stable component supply, RoHS-compliant packaging, and long-lifecycle availability.
Supply support for MP6003DN-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 core expertise 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, space-constrained telecom and industrial power supplies requiring integrated high-voltage switching and robust protection features.
FAQ
What is the maximum continuous output power achievable with MP6003DN-LF-Z?
The MP6003DN-LF-Z is rated for up to 15W continuous output power under typical conditions (TA = +25°C, SOIC8E package with adequate PCB copper). Actual deliverable power depends on ambient temperature, PCB thermal design, transformer efficiency, and input/output voltage combination-derating is required above +25°C per θJA = 50°C/W.
Can MP6003DN-LF-Z operate without an auxiliary winding for VCC bias?
Yes. MP6003DN-LF-Z incorporates a 100V high-voltage startup circuit that charges VCC from VIN, enabling operation without an auxiliary winding. Once VCC reaches 6.0V, the internal startup switch disconnects, and VCC is sustained by the auxiliary winding or external bias-if present-or discharged through operating current until recharged.
How does the LINE pin function in both UVLO/OVLO and enable modes?
The LINE pin monitors input voltage via an external resistor divider. When its voltage falls below 1.21V or rises above 3.0V, the controller disables switching and enters standby. Grounding the LINE pin forces immediate disable-making it usable as a hardware enable/disable signal independent of input voltage level.
What is the purpose of the RT pin's dual functionality?
The RT pin sets oscillator frequency via an external resistor to GND (60–550kHz range) and also accepts external clock signals for synchronization. When used as sync input, the external clock must exceed the internal frequency, have 50–150ns pulse width, and be AC-coupled via 100pF capacitor with >3.5V peak amplitude.
Does MP6003DN-LF-Z support both flyback and SEPIC topologies out-of-the-box?
Yes. The MP6003DN-LF-Z is explicitly designed for both flyback and SEPIC configurations, as confirmed in its datasheet description and typical application schematics. Its current-mode control, duty-cycle limiting, and integrated switch make it suitable for either topology without modification-only transformer/inductor and diode selection differ.
What protection features are built into MP6003DN-LF-Z?
MP6003DN-LF-Z includes over-current protection (cycle-by-cycle limiting), short-circuit protection (auto-restart), over-voltage protection (via FB pin and internal clamp), line over/under-voltage lockout (via LINE pin), thermal shutdown (150°C), and internal soft-start. All protections are fully integrated and require no external components to activate.
MP6003DN-LF-Z 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-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-Z FAQ
1.How can I place an order for MP6003DN-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP6003DN-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 MP6003DN-LF-Z reliable?
The price and inventory of MP6003DN-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 MP6003DN-LF-Z is usually 5 days.
3.What payment methods are accepted for MP6003DN-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6003DN-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP6003DN-LF-Z?
MP6003DN-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP6003DN-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 MP6003DN-LF-Z?
For technical support, including MP6003DN-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6003DN-LF-Z requirements.
6.How does Aetrix verify that MP6003DN-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP6003DN-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 MP6003DN-LF-Z meets industry standards.
7.What is the process for return or replacement of MP6003DN-LF-Z?
All MP6003DN-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP6003DN-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 MP6003DN-LF-Z part is unused and in its original packaging.
Return procedure for MP6003DN-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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