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Texas Instruments LM5001SD/NOPB
- Part No.:
- LM5001SD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM5001SD/NOPB.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:5,687
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Product details
Overview
LM5001SD/NOPB from Texas Instruments is a high-voltage current-mode PWM controller IC integrating a 75-V, 1-A peak-rated N-channel MOSFET for Boost, Flyback, SEPIC, and Forward converter topologies. It operates from 3.1 V to 75 V input, delivers 1.26 V ±1.5% reference accuracy, supports up to 1.5 MHz switching frequency via RT resistor, and includes cycle-by-cycle current limiting, thermal shutdown at 165°C, and integrated slope compensation. It is used in industrial DC-DC power supplies requiring wide-input, isolated or non-isolated regulation.
For engineers reviewing the LM5001SD/NOPB datasheet, LM5001SD/NOPB pinout, LM5001SD/NOPB application, or LM5001SD/NOPB equivalent, key selection criteria include its 75-V internal MOSFET RDS(on) (490–800 mΩ), adjustable 50 kHz–1.5 MHz oscillator, EN/UVLO dual-threshold control (0.45 V shutdown / 1.26 V enable), COMP-driven loop compensation, and SOIC-8 package compatibility with thermal pad (EP).
Technical Context
The LM5001SD/NOPB implements fixed-frequency current-mode control with leading-edge blanking, internal 450-mV slope compensation, and a 1.26-V precision feedback reference. Its PWM comparator compares amplified current-sense voltage (1.05 V/A) plus slope ramp against COMP voltage to determine MOSFET turn-off timing.
It integrates a high-voltage bias regulator (VCC) that tracks VIN up to 6.9 V then regulates at 6.9 V, with 20 mA current limit and 2.8 V UVLO threshold. The EN pin provides three operational states-shutdown (VEN < 0.45 V), standby (0.45 V < VEN < 1.26 V), and full operation (VEN > 1.26 V)-with 100 mV hysteresis per threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.1 V to 75 V - supports wide-range industrial and automotive inputs without external pre-regulation |
| Internal MOSFET Rating | 75 V VDSS, 1 A peak current - enables self-contained high-voltage switch-mode designs |
| Feedback Reference | 1.260 V ±1.5% - ensures tight output voltage regulation across –40°C to +125°C |
| Switching Frequency | 50 kHz to 1.5 MHz - set by single RT resistor; allows optimization of size vs. efficiency |
| Current Limit Threshold | 0.8 A to 1.2 A - cycle-by-cycle protection prevents MOSFET overcurrent during transients |
| Thermal Shutdown | 165°C with 20°C hysteresis - protects die integrity and enables automatic recovery after cooling |
| Max Duty Cycle | 85% - limits minimum off-time for stable operation in high-step-up topologies |
| COMP Sink Current | 2.5 mA at 250 mV - drives opto-coupler LEDs directly in isolated feedback configurations |
Pinout & Package
LM5001SD/NOPB is housed in an SOIC-8 package (4.9 mm × 3.91 mm) with exposed thermal pad (EP) connected internally to GND (Pin 6). The EP must be soldered to PCB ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Power MOSFET drain | High-voltage switching node; connects to transformer primary or boost inductor; requires low-inductance layout |
| 2 VIN | Main input supply | Accepts 3.1–75 V; powers internal VCC regulator and MOSFET gate drive; needs local ceramic bypass |
| 3 VCC | Bias regulator output/input | Internally regulated at 6.9 V (for VIN > 6.9 V); can accept external 7–12 V supply to reduce dissipation |
| 4 GND | Power and signal reference | Return path for MOSFET current sense, error amplifier, and internal regulators; ties to EP |
| 5 RT | Oscillator programming/sync input | Resistor-to-GND sets frequency; accepts AC-coupled sync pulses >2.6 V for external clock alignment |
| 6 FB | Feedback input | Inverting input of error amp; referenced to 1.26 V internal bandgap; connects to resistor divider on output |
| 7 COMP | Error amplifier output | Drives external Type II compensation network or opto-coupler LED; open-drain with 5 kΩ pull-up |
| 8 EN | Enable/UVLO input | Three-state control: <0.45 V = shutdown (95 µA IQ), 0.45–1.26 V = standby, >1.26 V = active |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 75-V, 1-A Peak MOSFET | Eliminates external high-voltage switch; reduces BOM count and layout complexity in Boost/Flyback designs |
| Adjustable 50 kHz–1.5 MHz Oscillator | Single RT resistor enables frequency tuning without changing IC; supports EMI spread-spectrum or noise-sensitive applications |
| 1.26 V ±1.5% Internal Reference | Enables accurate output regulation across temperature and line; reduces need for external trimming in production |
| Cycle-by-Cycle Current Limiting | Provides inherent short-circuit and overload protection without additional sensing circuitry |
| Thermal Shutdown with Hysteresis | Automatically disables switching at 165°C and resumes only after ~20°C cooldown-prevents thermal runaway |
| Three-Level EN Pin Control | Supports sequenced power-up, remote shutdown, and standby mode with VCC regulator active for auxiliary circuits |
Applications
| Industrial DC-DC Power Supply | Automotive On-Board Charger Interface |
|---|---|
|
Use Scenario: 24 V nominal bus powering 48 V auxiliary rail in factory automation PLCs. IC Role / Device Role / Timing Role: Primary-side Flyback controller regulating isolated 48 V output; manages MOSFET switching, current sensing, and feedback loop via COMP/FB. Use Value: Wide 3.1–75 V input accommodates brownouts and surges; integrated MOSFET eliminates external HV FET; 1.26 V reference ensures <±2% output tolerance. |
Use Scenario: High-voltage DC-DC stage in EV bidirectional OBC converting 400 V battery to 12 V system rail. IC Role / Device Role / Timing Role: Boost controller operating in continuous conduction mode; uses RT pin for synchronized switching to reduce EMI coupling into CAN/LIN buses. Use Value: 75 V MOSFET rating safely handles 400 V reflected transients with snubber; EN pin enables controlled soft-start during battery connection. |
| Telecom 48 V Backup Converter | Isolated Medical Sensor Power |
|
Use Scenario: Telecom shelf backup system converting -48 V DC to +5 V for critical control logic during AC failure. IC Role / Device Role / Timing Role: Inverting SEPIC controller; FB pin monitors secondary-side output while COMP drives opto-coupler for isolation. Use Value: Dual EN thresholds allow graceful degradation: standby mode maintains VCC for monitoring during low-line, full shutdown cuts leakage below 130 µA. |
Use Scenario: Patient-connected diagnostic device requiring reinforced isolation between sensor front-end and digital processing unit. IC Role / Device Role / Timing Role: Flyback controller with primary-side regulation; COMP pin directly drives opto-coupler LED; FB grounded on primary side. Use Value: Integrated slope compensation ensures stable current-mode operation at >50% duty cycles required for high step-up ratios; 165°C thermal shutdown meets IEC 60601 creepage/safety margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage current-mode controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5002SD/NOPB | Higher 100-V MOSFET rating; 2-A peak current limit; same SOIC-8 footprint | Required for inputs exceeding 75 V or higher output power (>100 W) | Select when input voltage exceeds 75 V or peak load current exceeds 1.2 A |
| UCC28C42DR | No integrated MOSFET; 30-V max VDD; requires external HV FET; lower quiescent current (1.5 mA) | Suitable for cost-sensitive, lower-power (<30 W) designs where external FET selection is preferred | Choose when design flexibility, lower BOM cost, or tighter light-load efficiency outweighs integration benefit |
Compared with LM5001SD/NOPB, LM5002SD/NOPB extends input voltage headroom and current capability while maintaining pin compatibility, whereas UCC28C42DR trades integration for design flexibility and lower static power-making it appropriate for lower-power, externally switched topologies.
Availability
LM5001SD/NOPB is available at Aetrix Electronics and suitable for industrial DC-DC power supplies, automotive body electronics, and telecom backup converters requiring stable component supply, long-term lifecycle support, and TI-qualified AEC-Q100 grade availability.
Supply support for LM5001SD/NOPB 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
Texas Instruments is a global semiconductor leader designing analog and embedded processing chips for industrial, automotive, and communications markets, with over 90 years of innovation in power management ICs.
The LM5001 belongs to TI's high-voltage DC-DC controller product line, engineered specifically for rugged, wide-input Boost, Flyback, SEPIC, and Forward converters in harsh environments where reliability and integration are critical.
FAQ
What is the maximum input voltage supported by the LM5001SD/NOPB?
The LM5001SD/NOPB supports an absolute maximum input voltage of 76 V on the VIN pin, with recommended operation from 3.1 V to 75 V. Exceeding 76 V risks permanent damage due to breakdown of the internal 75-V MOSFET and bias regulator. Transient ringing on VIN must be clamped below this limit using proper layout and input filtering, as specified in the LM5001SD/NOPB datasheet Section 8.1.1.
Can the LM5001SD/NOPB be synchronized to an external clock?
Yes, the LM5001SD/NOPB supports external synchronization via the RT pin. An AC-coupled clock signal (≥2.6 V peak, ≥15 ns pulse width) applied through a 100-pF capacitor will align the internal oscillator's rising edge to the external clock. The RT resistor remains mandatory in all cases, and the external clock frequency must exceed the free-running frequency set by that resistor, as detailed in LM5001SD/NOPB datasheet Section 7.3.3.
How does the EN pin function in the LM5001SD/NOPB?
The EN pin on the LM5001SD/NOPB provides three distinct operational modes: shutdown (VEN < 0.45 V, IQ ≈ 95 µA), standby (0.45 V < VEN < 1.26 V, VCC active but PWM disabled), and full operation (VEN > 1.26 V). Internal 6-µA pull-up enables default activation; external resistor dividers or open-drain devices can configure precise UVLO thresholds, as shown in LM5001SD/NOPB Figure 15 and Section 7.3.4.
What is the purpose of the COMP pin in the LM5001SD/NOPB?
The COMP pin on the LM5001SD/NOPB is the open-drain output of the internal error amplifier. It sources no current but sinks up to 2.5 mA and is intended for connecting a Type II compensation network between COMP and FB-or for driving an opto-coupler LED in isolated topologies. Its 5-kΩ internal pull-up enables direct opto-coupler biasing when FB is grounded, as described in LM5001SD/NOPB Section 7.3.5 and Figure 13.
Does the LM5001SD/NOPB include slope compensation, and why is it needed?
Yes, the LM5001SD/NOPB integrates a fixed 450-mV peak slope compensation ramp summed with the current-sense signal before comparison to the COMP voltage. This prevents sub-harmonic oscillation in current-mode control when duty cycles exceed 50%, which is essential for stable operation in Boost and Flyback topologies with high step-up ratios, as explained in LM5001SD/NOPB Section 7.3.6.
LM5001SD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive, Isolation Capable
- Topology:
- Boost, Flyback, Forward Converter, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.1V
- Voltage - Input (Max):
- 75V
- Voltage - Output (Min/Fixed):
- 3.1V
- Voltage - Output (Max):
- 76V (Switch)
- Current - Output:
- 800mA (Switch)
- Frequency - Switching:
- 50kHz ~ 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (4x4)
LM5001SD/NOPB FAQ
1.How can I place an order for LM5001SD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5001SD/NOPB 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 LM5001SD/NOPB reliable?
The price and inventory of LM5001SD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5001SD/NOPB is usually 5 days.
3.What payment methods are accepted for LM5001SD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5001SD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5001SD/NOPB?
LM5001SD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5001SD/NOPB 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 LM5001SD/NOPB?
For technical support, including LM5001SD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5001SD/NOPB requirements.
6.How does Aetrix verify that LM5001SD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5001SD/NOPB 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 LM5001SD/NOPB meets industry standards.
7.What is the process for return or replacement of LM5001SD/NOPB?
All LM5001SD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5001SD/NOPB, 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 LM5001SD/NOPB part is unused and in its original packaging.
Return procedure for LM5001SD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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