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Texas Instruments LM5001IDRQ1
- Part No.:
- LM5001IDRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5001IDRQ1.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,179
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Product details
Overview
LM5001IDRQ1 from Texas Instruments is an AEC-Q100 qualified high-voltage current-mode PWM controller with integrated 75-V/1-A N-channel MOSFET, supporting boost, flyback, SEPIC, and forward topologies. It operates from 3.1 V to 75 V input, delivers 1.26 V ±1.5% reference accuracy, features adjustable switching frequency up to 1.5 MHz via RT resistor, and includes thermal shutdown at 165°C. It is used in automotive DC-DC power supplies requiring high-reliability regulation under wide input transients.
For engineers reviewing the LM5001IDRQ1 datasheet, LM5001IDRQ1 pinout, LM5001IDRQ1 application, or LM5001IDRQ1 equivalent, key selection criteria include its 75-V integrated MOSFET RDS(on) (490–880 mΩ), cycle-by-cycle current limit (0.8–1.2 A), EN pin dual-threshold UVLO (0.45 V shutdown / 1.26 V enable), COMP pin open-circuit voltage (4.8–6.2 V), and SOIC-8 package compatibility with industrial and automotive thermal requirements.
Technical Context
The LM5001IDRQ1 implements peak current-mode control with internal slope compensation (450 mV ramp) to prevent sub-harmonic oscillation above 50% duty cycle. Its oscillator supports both free-running operation (set by RT-to-GND resistor) and external synchronization via rising-edge pulses coupled through a 100-pF capacitor to the RT pin, requiring ≥2.6 V threshold and ≥15 ns pulse width.
It integrates a high-voltage bias regulator that tracks VIN up to 6.9 V then regulates VCC at 6.85–7.15 V, with 20 mA current limit and 2.6–3.0 V UVLO threshold. The EN pin provides three operational states: shutdown (<0.45 V), standby (0.45–1.26 V, VCC active only), and full enable (>1.26 V), each with 100 mV hysteresis for noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.1 V to 75 V - supports direct connection to 12 V, 24 V, 48 V, and 60 V industrial/automotive rails without pre-regulation. |
| Integrated MOSFET | 75-V N-channel, 490–880 mΩ RDS(on) - enables compact high-voltage converter designs with no external high-side switch required. |
| Switching Frequency | 50 kHz to 1.5 MHz - set by single RT resistor; allows optimization of size vs. efficiency and EMI performance. |
| Current Limit | 0.8 A to 1.2 A cycle-by-cycle - provides inherent overcurrent protection and soft-start capability without external sensing. |
| Feedback Reference | 1.241 V to 1.279 V (1.26 V typical) - enables precise output voltage regulation with <±1.5% tolerance over temperature. |
| Thermal Shutdown | 165°C with 20°C hysteresis - protects die during overload or poor heatsinking; resumes operation only after cooling to ~145°C. |
| EN Pin Thresholds | 0.25–0.65 V (shutdown), 1.2–1.32 V (enable) - supports programmable UVLO using external resistor divider for system-level brownout control. |
Pinout & Package
LM5001IDRQ1 is housed in an SOIC-8 (D) package (4.9 mm × 3.91 mm), rated for automotive temperature range (−40°C to +125°C) and qualified per AEC-Q100 Grade 1. Exposed pad is not present - this variant uses standard SOIC without thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Power MOSFET drain node | High-voltage switching node; connects to transformer primary or boost inductor; requires low-inductance layout to minimize ringing. |
| 2 VIN | Main input supply | Accepts 3.1–75 V; powers internal VCC regulator and MOSFET gate drive; must be decoupled near pin with ≥0.47 µF ceramic capacitor. |
| 3 VCC | Bias regulator output/input | Internally regulated at 6.9 V (max); can accept external 7–12 V supply to bypass internal LDO and improve efficiency at high VIN. |
| 4 GND | Analog and power ground reference | Common return for current sense, feedback, and MOSFET source; must be low-impedance and separated from noisy power ground where possible. |
| 5 RT | Oscillator timing/sync input | Resistor-to-GND sets frequency; accepts external sync pulses >2.6 V with 100 pF AC coupling; internal 1.5 V DC bias maintained. |
| 6 FB | Feedback input | Connects to resistive divider from output; referenced to 1.26 V internal bandgap; 10 nA bias current enables high-impedance sensing. |
| 7 COMP | Error amplifier output | Open-drain output with 5 kΩ internal pull-up; drives external Type II compensation network or opto-coupler collector in isolated designs. |
| 8 EN | Enable/UVLO control | Three-state logic: <0.45 V = shutdown (95 µA IQ), 0.45–1.26 V = standby (VCC active), >1.26 V = full operation; 6 µA internal pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use across −40°C to +125°C junction temperature, including HTOL, TC, and ESD testing per JESD47. |
| Integrated 75-V MOSFET with current sense | Eliminates need for external high-voltage switch and discrete current-sense resistor; reduces BOM count and PCB area in boost/flyback designs. |
| Adjustable 50 kHz–1.5 MHz oscillator | Enables EMI spread-spectrum tuning and trade-off between magnetics size and conduction losses without changing IC. |
| Internal slope compensation | 450 mV fixed ramp prevents sub-harmonic oscillation in current-mode control when duty cycle exceeds 50%, ensuring stable loop behavior. |
| Dual-threshold EN pin with hysteresis | Supports robust system-level undervoltage lockout and remote shutdown via open-drain devices while retaining VCC bias during standby. |
| Thermal shutdown with hysteresis | Automatically disables PWM driver at 165°C and re-enables only after die cools to ~145°C, preventing thermal runaway during sustained overload. |
Applications
| Automotive Body Control Module (BCM) | Industrial 48 V Telecom Power Supply |
|---|---|
|
Use Scenario: Regulating 12 V battery input to stable 5 V/3.3 V for microcontrollers, sensors, and CAN transceivers in harsh vehicle environments. IC Role / Device Role / Timing Role: Primary PWM controller implementing flyback topology with integrated MOSFET and current-mode feedback for tight load regulation. Use Value: Eliminates external HV MOSFET and current-sense resistor, reducing component count by ≥4 parts while maintaining AEC-Q100 compliance and thermal robustness. |
Use Scenario: Generating isolated 12 V output from unregulated 48 V telecom rectifier bus for downstream DC-DC converters and interface circuitry. IC Role / Device Role / Timing Role: Flyback controller with opto-coupler feedback, using COMP pin to drive opto-LED and FB grounded on primary side. Use Value: Enables isolated regulation with <1.5% output accuracy and built-in slope compensation, avoiding instability in high-duty-cycle telecom applications. |
| Automotive LED Headlamp Driver | Industrial Boost Converter for Sensor Excitation |
|
Use Scenario: Driving high-brightness LEDs from variable 9–16 V automotive battery with constant-current regulation and dimming support. IC Role / Device Role / Timing Role: Boost controller with current-sense feedback loop; EN pin used for PWM dimming interface and thermal foldback. Use Value: Integrated 1-A current limit and 75-V MOSFET allow direct connection to battery rail without pre-regulator, simplifying headlamp ECU design. |
Use Scenario: Providing stable 24 V output from 12 V industrial PLC backplane to excite 4–20 mA current-loop sensors requiring precise voltage references. IC Role / Device Role / Timing Role: Non-isolated boost converter with adjustable output via FB divider; RT resistor tuned to 500 kHz for low-noise sensor excitation. Use Value: 1.26 V reference accuracy and wide input range ensure stable 24 V output even during 12 V rail sag, critical for analog sensor signal integrity. |
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 current limit, WSON-10 package; no AEC-Q100 qualification. | Targets industrial/higher-power boost/flyback where automotive qualification is not required and higher voltage margin is needed. | Choose LM5002SDX/NOPB when input may exceed 75 V or peak current >1.2 A is required; avoid if AEC-Q100 compliance is mandatory. |
| UCC28C42DR | External MOSFET controller only; no integrated switch; 30-V max VDD; lower quiescent current (1.2 mA). | Suitable for designs requiring discrete MOSFET selection (e.g., SiC/GaN), tighter efficiency targets, or lower-cost BOM with optimized FET choice. | Choose UCC28C42DR when flexibility in MOSFET selection, lower standby power, or cost-sensitive non-automotive applications outweigh integration benefits. |
Compared with LM5002SDX/NOPB and UCC28C42DR, LM5001IDRQ1 uniquely combines AEC-Q100 qualification, integrated 75-V MOSFET, and automotive-grade thermal protection in SOIC-8 - making it the only drop-in solution for safety-critical automotive boost/flyback converters where board space, qualification, and reliability are prioritized over maximum voltage headroom or ultra-low IQ.
Availability
LM5001IDRQ1 is available at Aetrix Electronics and suitable for automotive body control modules, industrial 48 V telecom power supplies, and LED headlamp drivers requiring stable component supply with guaranteed AEC-Q100 compliance and long-term production continuity.
Supply support for LM5001IDRQ1 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 company specializing in analog, embedded processing, and power management ICs, with leadership in automotive, industrial, and communications markets.
The LM5001IDRQ1 belongs to TI's high-voltage DC-DC controller product line, designed specifically for compact, reliable boost, flyback, SEPIC, and forward converters in automotive and industrial environments where wide input range and integrated protection are essential.
FAQ
What is the maximum input voltage rating for LM5001IDRQ1?
The absolute maximum VIN rating for LM5001IDRQ1 is 76 V, but the recommended operating range is 3.1 V to 75 V. Operation above 75 V risks exceeding absolute maximum ratings during transients; proper input filtering and clamping are required to prevent damage. The internal 75-V MOSFET and VCC regulator are designed for continuous operation within this 75-V limit.
Does LM5001IDRQ1 support external clock synchronization?
Yes, LM5001IDRQ1 supports external synchronization via its RT pin. An external clock signal, coupled through a 100-pF capacitor, must exceed 2.6 V threshold and have ≥15 ns pulse width. The internal RT node maintains a 1.5 V DC bias, and the sync pulse must be higher in frequency than the free-running oscillator set by the RT resistor.
How does the EN pin function in LM5001IDRQ1?
The EN pin on LM5001IDRQ1 provides three distinct modes: shutdown (<0.45 V, 95 µA IQ), standby (0.45–1.26 V, VCC active but PWM disabled), and full enable (>1.26 V). Each transition includes 100 mV hysteresis to reject noise. An internal 6 µA pull-up ensures default enable if left floating, and a 6 V Zener diode protects against overvoltage.
Can LM5001IDRQ1 be used in isolated flyback designs?
Yes, LM5001IDRQ1 is commonly used in isolated flyback converters. In such configurations, the FB pin is grounded on the primary side, and the COMP pin drives the opto-coupler LED on the secondary side. The internal error amplifier is disabled, allowing the secondary-side error amplifier to regulate output voltage with full isolation and safety compliance.
What is the purpose of slope compensation in LM5001IDRQ1?
Slope compensation in LM5001IDRQ1 adds a 450 mV ramp to the current-sense signal before comparison with the COMP voltage. This prevents sub-harmonic oscillation in peak current-mode control when duty cycle exceeds 50%, ensuring stable closed-loop operation across all input/output conditions without requiring external compensation components.
LM5001IDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Down, 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM5001IDRQ1 FAQ
1.How can I place an order for LM5001IDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5001IDRQ1 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 LM5001IDRQ1 reliable?
The price and inventory of LM5001IDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5001IDRQ1 is usually 5 days.
3.What payment methods are accepted for LM5001IDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5001IDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5001IDRQ1?
LM5001IDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5001IDRQ1 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 LM5001IDRQ1?
For technical support, including LM5001IDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5001IDRQ1 requirements.
6.How does Aetrix verify that LM5001IDRQ1 is sourced from the original manufacturer or authorized distributors?
All LM5001IDRQ1 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 LM5001IDRQ1 meets industry standards.
7.What is the process for return or replacement of LM5001IDRQ1?
All LM5001IDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM5001IDRQ1, 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 LM5001IDRQ1 part is unused and in its original packaging.
Return procedure for LM5001IDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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