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Texas Instruments LM5001SDE/NOPB
- Part No.:
- LM5001SDE/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM5001SDE/NOPB.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,586
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Product details
Overview
LM5001SDE/NOPB from Texas Instruments is a high-voltage current-mode PWM controller with integrated 75-V, 1-A peak-rated N-channel MOSFET, designed 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 via RT resistor, and includes cycle-by-cycle current limiting and thermal shutdown at 165°C - used in industrial DC-DC power supplies requiring wide-input-range regulation.
For engineers reviewing the LM5001SDE/NOPB datasheet, LM5001SDE/NOPB pinout, LM5001SDE/NOPB application, or LM5001SDE/NOPB equivalent, key selection criteria include its integrated 75-V MOSFET RDS(on) (490–800 mΩ), adjustable frequency (50 kHz–1.5 MHz), 85% max duty cycle, EN/UVLO dual-threshold control, and isolated feedback support via COMP/FB optocoupler interface.
Technical Context
The LM5001SDE/NOPB implements peak current-mode control with internal slope compensation (450 mV ramp) to prevent subharmonic oscillation above 50% duty cycle. Its PWM comparator compares amplified current-sense voltage (1.05 V/A) plus slope ramp against COMP voltage, while the error amplifier provides 72 dB DC gain and 3 MHz unity-gain bandwidth for loop stability.
It integrates a high-voltage bias regulator that tracks VIN up to 6.9 V then regulates VCC at 6.9 V (±3%), delivering up to 20 mA; an external 0.47-µF ceramic capacitor is required. The EN pin enables three operational states: shutdown (<0.45 V), standby (0.45–1.26 V), and full operation (>1.26 V), each with 100 mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.1 V to 75 V - supports direct connection to 48 V telecom, 24 V industrial, or battery-backed systems without pre-regulation. |
| Switching Frequency | 50 kHz to 1.5 MHz - set by single RT resistor; enables compact magnetics and EMI optimization via synchronization. |
| Feedback Reference | 1.260 V ±1.5% - precision internal reference enabling accurate output voltage regulation across –40°C to +125°C. |
| Current Limit Threshold | 0.8 A to 1.2 A - cycle-by-cycle MOSFET overcurrent protection with 100 ns response, usable for soft-start control. |
| Max Duty Cycle | 85% - limits minimum off-time for stable operation in high-step-up boost/flyback designs. |
| Thermal Shutdown | 165°C with 20°C hysteresis - protects die during overload or poor heatsinking; VCC remains active during shutdown. |
| VCC Regulator Output | 6.85 V typical (6.55–7.15 V) - powers internal circuitry and gate drive; accepts external 7–12 V supply to reduce dissipation. |
Pinout & Package
LM5001SDE/NOPB is housed in an SOIC-8 package (4.9 mm × 3.91 mm) with exposed pad (EP) connected to GND for thermal enhancement. Pin 1 is SW (MOSFET drain), Pin 2 is VIN (high-voltage input), Pin 3 is VCC (bias regulator output/input), Pin 4 is GND (power and signal ground), Pin 5 is RT (oscillator programming/sync input), Pin 6 is FB (feedback reference node), Pin 7 is COMP (error amplifier output/compensation node), and Pin 8 is EN (enable/UVLO control).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Power MOSFET drain | High-side switch node; connects to transformer primary or boost inductor; requires low-inductance layout. |
| VIN | Main input supply | Accepts 3.1–75 V; absolute max 76 V - transient suppression critical near upper limit. |
| VCC | Bias regulator output or external supply input | Internally regulated at ~6.9 V; external 7–12 V supply disables internal LDO to improve efficiency. |
| GND | Signal and power return | Reference for FB, COMP, RT, EN; must be low-impedance path to minimize noise coupling. |
| RT | Oscillator timing/sync input | Resistor-to-GND sets frequency; AC-coupled external clock ≥ FSW synchronizes rising edge. |
| FB | Inverting input of error amplifier | Connected to resistive divider from output; 1.26 V reference on non-inverting input enables precise regulation. |
| COMP | Error amplifier output | Drives external Type II compensation network; open-drain capable for optocoupler interface in isolated designs. |
| EN | Enable/UVLO/standby control | Three-state logic: <0.45 V = shutdown (95 µA IQ), 0.45–1.26 V = standby (VCC active), >1.26 V = full operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 75-V N-Channel MOSFET | Eliminates external high-voltage switch; RDS(on) = 490–800 mΩ ensures low conduction loss in 48 V input boost converters. |
| Ultra-wide 3.1 V to 75 V input range | Enables single-part solutions across automotive cold-crank (≥3.1 V), industrial 24/48 V, and telecom -48 V systems without auxiliary bias winding. |
| Adjustable 50 kHz–1.5 MHz oscillator | Single RT resistor simplifies frequency tuning; synchronization capability allows EMI spread-spectrum or multi-phase coordination. |
| Current-mode control with slope compensation | Prevents subharmonic oscillation in >50% duty applications (e.g., high-ratio flyback); built-in 450 mV ramp reduces external component count. |
| Dual-threshold EN pin with hysteresis | Supports programmable UVLO and remote shutdown via resistor divider or open-drain devices - critical for system-level power sequencing. |
| Isolated feedback compatibility | COMP pin drives optocoupler collector directly when FB is grounded, enabling secondary-side regulation in offline flyback designs. |
Applications
| Industrial 48 V DC-DC Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Step-up conversion from 24 V battery to 48 V rail for ADAS camera power and LED lighting drivers. IC Role / Device Role / Timing Role: Primary-side current-mode controller in non-isolated boost topology; regulates output under load transients and cold-crank conditions. Use Value: 75 V MOSFET rating withstands 120 V load-dump spikes; 1.26 V reference ensures ±1.5% output accuracy across temperature. | Use Scenario: Flyback converter powering infotainment MCU, CAN transceivers, and sensor interfaces from 12 V vehicle battery. IC Role / Device Role / Timing Role: Isolated flyback controller with optocoupler feedback; EN pin tied to microcontroller GPIO for controlled startup/shutdown. Use Value: Dual-threshold EN enables safe brown-out recovery; thermal shutdown prevents latch-up during under-hood overheating. |
| Telecom -48 V Backup Power | SEPIC for Wide-Input Industrial Sensor Hub |
Use Scenario: Boost converter generating +5 V or +12 V from -48 V telecom supply using inverted topology with floating ground reference. IC Role / Device Role / Timing Role: High-side switch controller in inverted boost configuration; VCC powered from auxiliary winding for efficiency. Use Value: 75 V MOSFET and 76 V absolute max VIN rating safely handle -48 V input with margin; VCC regulation improves light-load efficiency. | Use Scenario: Single-ended primary-inductor converter powering mixed-signal sensors from variable 9–36 V industrial bus. IC Role / Device Role / Timing Role: SEPIC controller maintaining regulation during input dips below output voltage (e.g., 12 V out from 9 V min input). Use Value: 85% max duty cycle and current-mode control ensure stable operation across full input range; RT programming enables 600 kHz for small magnetics. |
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 package and pinout. | Required for >75 V input systems (e.g., 96 V battery stacks); supports higher output power due to increased current capability. | Select when input exceeds 75 V or peak load current exceeds 1.2 A - no PCB change needed. |
| UCC28C42DR | External MOSFET driver; no integrated switch; 30-V VDD max; 1-MHz max frequency; 8-pin SOIC. | Suitable for discrete high-voltage FET designs where thermal management or voltage rating exceeds LM5001SDE/NOPB limits. | Choose when design requires >75 V FETs, custom gate drive timing, or lower quiescent current (200 µA vs 130 µA). |
Compared with LM5001SDE/NOPB, LM5002SD/NOPB extends input voltage and current capability without layout changes, while UCC28C42DR trades integration for flexibility in ultra-high-voltage or thermally constrained applications - both require revalidation of compensation and layout.
Availability
LM5001SDE/NOPB is available at Aetrix Electronics and suitable for industrial DC-DC power supplies, automotive body electronics, and telecom backup systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM5001SDE/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 specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-reliability power conversion solutions.
The LM5001SDE/NOPB belongs to TI's high-voltage DC-DC controller product line, engineered for rugged industrial, automotive, and telecom applications demanding wide-input operation, integrated power switches, and robust protection features.
FAQ
What is the maximum input voltage rating for LM5001SDE/NOPB?
The LM5001SDE/NOPB has an absolute maximum VIN rating of 76 V, with recommended operating range from 3.1 V to 75 V. Exceeding 76 V risks permanent damage due to voltage breakdown. In practice, designs should maintain ≥1 V margin and use input transient suppression (e.g., TVS diode, LC filter) especially near the 75 V upper limit. The LM5001SDE/NOPB's integrated 75-V MOSFET is rated for continuous 75 V drain-source voltage.
How does the EN pin function on LM5001SDE/NOPB?
The EN pin on LM5001SDE/NOPB provides three distinct operational modes: shutdown (<0.45 V, IQ ≈ 95 µA), standby (0.45–1.26 V, VCC active but PWM disabled), and full operation (>1.26 V). Each threshold includes 100 mV hysteresis to prevent chatter. An internal 6-µA pull-up current source enables default operation when EN is left open. This behavior makes LM5001SDE/NOPB suitable for microcontroller-controlled power sequencing and brown-out recovery.
Can LM5001SDE/NOPB be used in isolated flyback designs?
Yes, LM5001SDE/NOPB supports isolated flyback topologies via its COMP and FB pins. When FB is grounded, the internal error amplifier is disabled and COMP becomes an open-drain output that can directly drive the collector of an optocoupler transistor. This allows secondary-side regulation using an external TL431 or shunt regulator, with compensation implemented on the secondary side - a standard architecture for safety-isolated AC/DC and telecom power supplies.
What is the purpose of slope compensation in LM5001SDE/NOPB?
Slope compensation in LM5001SDE/NOPB adds a fixed 450 mV ramp to the current-sense signal before comparison with the COMP voltage. This prevents subharmonic oscillation in peak current-mode control when duty cycle exceeds 50%, which commonly occurs in high-step-up flyback or boost converters. The LM5001SDE/NOPB implements this internally, eliminating external components and ensuring stable loop behavior across all operating conditions.
Does LM5001SDE/NOPB support external clock synchronization?
Yes, LM5001SDE/NOPB supports external synchronization via the RT pin. An AC-coupled clock signal (≥100 pF capacitor) with peak amplitude >2.6 V and pulse width >15 ns can synchronize the internal oscillator to an external source. The free-running frequency must be lower than the sync clock, and the RT resistor remains mandatory in all configurations. This feature enables EMI reduction through spread-spectrum techniques or phase interleaving in multi-converter systems.
LM5001SDE/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)
LM5001SDE/NOPB FAQ
1.How can I place an order for LM5001SDE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5001SDE/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 LM5001SDE/NOPB reliable?
The price and inventory of LM5001SDE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5001SDE/NOPB is usually 5 days.
3.What payment methods are accepted for LM5001SDE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5001SDE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5001SDE/NOPB?
LM5001SDE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5001SDE/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 LM5001SDE/NOPB?
For technical support, including LM5001SDE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5001SDE/NOPB requirements.
6.How does Aetrix verify that LM5001SDE/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5001SDE/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 LM5001SDE/NOPB meets industry standards.
7.What is the process for return or replacement of LM5001SDE/NOPB?
All LM5001SDE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5001SDE/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 LM5001SDE/NOPB part is unused and in its original packaging.
Return procedure for LM5001SDE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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