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Texas Instruments LM5001SDX/NOPB
- Part No.:
- LM5001SDX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM5001SDX/NOPB.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,839
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Product details
Overview
LM5001SDX/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 enable/UVLO with dual thresholds (0.45 V shutdown, 1.26 V standby).
For engineers reviewing the LM5001SDX/NOPB datasheet, LM5001SDX/NOPB pinout, LM5001SDX/NOPB application, or LM5001SDX/NOPB equivalent, key selection considerations include its integrated 75-V MOSFET RDS(on) (490–800 mΩ), adjustable output voltage via FB divider, COMP pin for Type II loop compensation, and SOIC-8 package compatibility with industrial and automotive DC-DC power supplies.
Technical Context
The LM5001SDX/NOPB implements peak current-mode control with internal slope compensation (450 mV ramp) to prevent sub-harmonic oscillation above 50% duty cycle. Its PWM comparator compares the amplified current sense signal (1.05 V/A) against the COMP voltage plus ramp, while the error amplifier provides 72 dB DC gain and 3 MHz unity-gain bandwidth for stable regulation.
It features a high-voltage bias regulator (VCC) tracking VIN up to 6.9 V, then clamping at 6.85–7.15 V, with 20 mA current limit and 2.6–3.0 V UVLO threshold. The EN pin enables 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 state.
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 |
| Switching Frequency | 50 kHz to 1.5 MHz - set by single RT resistor; enables compact magnetics and EMI optimization |
| Feedback Reference | 1.241 V to 1.279 V - 1.5% accuracy over –40°C to +125°C ensures tight output voltage regulation |
| Current Limit | 0.8 A to 1.2 A peak - cycle-by-cycle protection prevents MOSFET overstress during transients or short circuits |
| Thermal Shutdown | 165°C with 20°C hysteresis - protects die integrity and enables safe auto-recovery after cooling |
| MOSFET RDS(on) | 490 mΩ to 800 mΩ - low conduction loss enables high efficiency in high-voltage boost/flyback designs |
| COMP Sink Current | 2.5 mA at 250 mV - sufficient drive strength for opto-coupler-based isolated feedback networks |
Pinout & Package
LM5001SDX/NOPB is housed in an SOIC-8 (D) package (4.9 mm × 3.91 mm) with exposed pad not present - compatible with standard SOIC-8 PCB footprints and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Power switch drain | Connects to transformer primary or boost inductor; carries high dv/dt switching node - requires minimized trace area |
| 2 VIN | Main input supply | Accepts 3.1–75 V; powers internal VCC regulator and MOSFET gate driver - needs local 0.47 µF ceramic bypass |
| 3 VCC | Bias supply output/input | Internally regulated to ~6.9 V (up to 20 mA); can accept external 7–12 V supply to improve efficiency at high VIN |
| 4 GND | Power and signal ground | Reference for current sense, FB, COMP, and RT; must be low-impedance star point near SW and VIN decoupling |
| 5 RT | Oscillator timing/sync input | Resistor-to-GND sets frequency; accepts AC sync pulses >2.6 V peak via 100 pF capacitor - no layout floating |
| 6 FB | Feedback input | Connects to resistor divider from output; 10 nA bias current enables high-impedance sensing and precision regulation |
| 7 COMP | Error amplifier output | Drives external Type II compensation network or opto-coupler collector; 5 kΩ internal pull-up aids isolated designs |
| 8 EN | Enable/UVLO input | 6 µA internal pull-up enables default-on operation; dual thresholds allow programmable start-up and remote shutdown |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 75-V N-Channel MOSFET | Eliminates external high-voltage switch, reducing BOM count and layout complexity in flyback/boost converters |
| Adjustable 50 kHz–1.5 MHz oscillator | Single RT resistor programming enables precise frequency selection without trimming or calibration |
| Current-mode control with slope compensation | Prevents sub-harmonic oscillation in >50% duty cycle applications (e.g., high-input-voltage flyback) without external components |
| Dual-threshold EN pin with hysteresis | Supports robust UVLO, remote shutdown, and standby modes - simplifies system-level power sequencing |
| Internal 1.26 V reference with 1.5% accuracy | Enables stable output regulation across temperature and line variations without external reference ICs |
Applications
| Industrial Power Supplies | Automotive DC-DC Converters |
|---|---|
|
Use Scenario: 24 V truck battery powering 48 V telecom equipment via isolated flyback converter. IC Role / Device Role / Timing Role: Primary-side PWM controller regulating output using opto-coupler feedback; sets switching frequency and controls MOSFET gate drive timing. Use Value: Integrated 75-V MOSFET withstands load-dump transients up to 75 V; thermal shutdown prevents failure during under-hood overheating. |
Use Scenario: 12 V automotive battery stepping up to 24 V for ADAS camera modules. IC Role / Device Role / Timing Role: Non-isolated boost controller managing output voltage via FB divider; EN pin tied to MCU GPIO for ignition-synchronized enable. Use Value: Wide 3.1–75 V input range accommodates cold-crank (6 V) and load-dump (48 V); AEC-Q100 qualification ensures reliability. |
| Telecom Base Station Power | Industrial IoT Sensor Nodes |
|
Use Scenario: 48 V telecom rectifier feeding isolated forward converter for 5 V/3.3 V logic rails. IC Role / Device Role / Timing Role: Forward topology controller synchronizing to system clock via RT pin; COMP drives opto-coupler for secondary-side regulation. Use Value: Oscillator synchronization eliminates beat frequencies in multi-rail systems; 85% max duty cycle supports high step-down ratios. |
Use Scenario: Battery-powered environmental sensor node requiring 3.3 V rail from 2–4 cell Li-ion (6–16.8 V). IC Role / Device Role / Timing Role: SEPIC controller enabling regulation above/below input voltage; EN pin used for deep-sleep wake-up control. Use Value: 95 µA shutdown current extends battery life; adjustable frequency allows noise shaping away from RF bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5002SDX/NOPB | Higher 100-V MOSFET rating, 2-A peak current limit, wider 2.5–100 V input range | Better suited for 48 V+ industrial systems with higher transient margins or higher output power | Select when input exceeds 75 V or peak load current exceeds 1.2 A |
| UCC28C42DR | No integrated MOSFET; 30-V max VDD, 1-A current sense, fixed 1 MHz frequency | Requires external high-voltage switch; lower integration but broader VDD flexibility and tighter frequency tolerance | Choose for designs needing discrete MOSFET selection or operating below 30 V input |
Compared with LM5002SDX/NOPB, LM5001SDX/NOPB offers lower cost and smaller footprint for ≤75 V inputs, while UCC28C42DR provides greater design flexibility at the expense of external component count and reduced HV robustness.
Availability
LM5001SDX/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive DC-DC converters, and telecom base station power requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LM5001SDX/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 delivering analog and embedded processing solutions, with over 90 years of innovation in power management ICs and automotive-grade components.
The LM5001 belongs to TI's high-voltage DC-DC controller product line, designed specifically for efficient, compact, and robust non-isolated and isolated power conversion in harsh environments - including industrial automation, transportation, and communications infrastructure.
FAQ
What is the maximum input voltage rating for LM5001SDX/NOPB?
The absolute maximum VIN rating for LM5001SDX/NOPB is 76 V, with recommended continuous operation up to 75 V. Exceeding this risks permanent damage due to internal junction breakdown. Transient spikes (e.g., automotive load dump) must be clamped externally - TI recommends using TVS diodes and proper PCB layout with minimized VIN-GND loop area to maintain reliability within spec.
Does LM5001SDX/NOPB support isolated power supply designs?
Yes, LM5001SDX/NOPB supports isolated topologies including flyback and forward converters. Its COMP pin features a 5 kΩ internal pull-up resistor optimized for driving opto-coupler transistors, and FB can be grounded on the primary side to disable the internal error amplifier - enabling full secondary-side regulation with external error amplifiers and feedback isolation.
How is the switching frequency set on LM5001SDX/NOPB?
The switching frequency of LM5001SDX/NOPB is set by a single resistor (RT) connected between the RT pin and GND. Using the formula FSW ≈ 13.1 × 10⁹ / (RRT + 83 ns), designers select RRT to achieve frequencies from 50 kHz to 1.5 MHz. For example, 48.7 kΩ yields ~260 kHz. The RT pin also accepts external sync pulses >2.6 V peak via 100 pF coupling capacitor.
What protection features does LM5001SDX/NOPB include?
LM5001SDX/NOPB integrates cycle-by-cycle current limiting (0.8–1.2 A), thermal shutdown at 165°C with 20°C hysteresis, undervoltage lockout on VCC (2.6–3.0 V), dual-threshold EN pin for programmable shutdown/standby, and leading-edge blanking to suppress MOSFET turn-on current spikes. These features collectively ensure robust operation under fault conditions without external circuitry.
Is LM5001SDX/NOPB pin-compatible with other members of the LM500x family?
LM5001SDX/NOPB shares the same SOIC-8 pinout with LM5002SDX/NOPB and LM5001-Q1, enabling direct PCB footprint reuse. However, differences in MOSFET rating (75 V vs. 100 V), current limit (1 A vs. 2 A), and qualification level (industrial vs. AEC-Q100) require validation of electrical stress margins and thermal performance before substitution.
LM5001SDX/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)
LM5001SDX/NOPB FAQ
1.How can I place an order for LM5001SDX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5001SDX/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 LM5001SDX/NOPB reliable?
The price and inventory of LM5001SDX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5001SDX/NOPB is usually 5 days.
3.What payment methods are accepted for LM5001SDX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5001SDX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5001SDX/NOPB?
LM5001SDX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5001SDX/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 LM5001SDX/NOPB?
For technical support, including LM5001SDX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5001SDX/NOPB requirements.
6.How does Aetrix verify that LM5001SDX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5001SDX/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 LM5001SDX/NOPB meets industry standards.
7.What is the process for return or replacement of LM5001SDX/NOPB?
All LM5001SDX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5001SDX/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 LM5001SDX/NOPB part is unused and in its original packaging.
Return procedure for LM5001SDX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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