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Texas Instruments LM2592HVT-3.3
- Part No.:
- LM2592HVT-3.3
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2592HVT-3.3.pdf
- Description:
- IC REG BUCK 3.3V 2A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,779
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Product details
Overview
LM2592HVT-3.3 from Texas Instruments is a monolithic 150 kHz step-down (buck) switching regulator IC delivering a fixed 3.3 V output at up to 2 A load current, with ±4% output voltage tolerance over line and load, input voltage range up to 60 V, and integrated thermal shutdown and current limiting. It serves as a primary DC/DC power conversion stage in industrial power supplies and automotive subsystems.
For engineers reviewing the LM2592HVT-3.3 datasheet, LM2592HVT-3.3 pinout, LM2592HVT-3.3 application, or LM2592HVT-3.3 equivalent, key selection considerations include its 60 V max input rating, 2 A guaranteed output capability, 150 kHz fixed-frequency operation enabling compact filter design, ON/OFF control interface, and thermal protection for high-reliability embedded power rails.
Technical Context
The LM2592HVT-3.3 integrates a PWM controller, power switch, oscillator, error amplifier, and current-sense circuitry in a single chip. Its internal 150 kHz oscillator drives a buck topology with fixed duty-cycle modulation, supporting continuous conduction mode operation across 4.5–60 V input and 3.3 V output at 2 A.
It features dual-stage current limiting (peak switch current limit of 2.4–4.0 A), thermal shutdown at +150°C junction temperature, and an ON/OFF pin with 1.3 V threshold and 90 μA standby current. The feedback loop is internally connected to the output for fixed-voltage versions, eliminating external resistor dividers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±4% (3.135–3.465 V) over full line/load/temperature range - ensures stable logic rail generation without external adjustment. |
| Max Input Voltage | 60 V - supports wide-input applications including 24 V and 48 V industrial buses and automotive cold-crank conditions. |
| Output Current | 2 A ensured - enables direct powering of microcontrollers, FPGAs, and peripheral ICs without external pass devices. |
| Switching Frequency | 150 kHz (110–173 kHz range) - allows use of standard, low-cost inductors and capacitors while balancing EMI and efficiency. |
| Efficiency | 76% at VIN = 12 V, IOUT = 2 A - delivers high conversion efficiency with minimal heat dissipation in TO-220 or DDPAK packages. |
| Quiescent Current | 90 μA in standby (SD pin = 0 V) - enables ultra-low-power shutdown for battery-backed or energy-sensitive systems. |
| Thermal Protection | Junction shutdown at +150°C - prevents permanent damage during overload or poor heatsinking conditions. |
Pinout & Package
LM2592HVT-3.3 is available in the TO-220 (KTT) and DDPAK (NDH) 5-lead packages. Both feature exposed thermal pads for enhanced heat transfer and identical pin assignments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VIN (Pin 1) | Input supply connection | Accepts 4.5–60 V DC; requires local low-ESR bypass capacitor to handle high di/dt switching currents. |
| Output (Pin 2) | Internal power switch drain | Swings between ~(+VIN − 1.4 V) and ~−0.5 V; connects to external catch diode and inductor node. |
| Ground (Pin 3) | Power and signal reference | Common return for input/output capacitors, feedback network, and ON/OFF control; must be low-impedance. |
| Feedback (Pin 4) | Regulation sense input | Internally tied to output for fixed 3.3 V version; no external divider needed - simplifies layout and improves accuracy. |
| ON/OFF (Pin 5) | Shutdown control input | Drives high (≥2.0 V) to disable regulator (90 μA IQ); floats or pulled low (≤0.6 V) for normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power switch | 2 A rated MOSFET with 1.3 V saturation voltage - eliminates external transistor and reduces BOM count and board area. |
| Fixed-frequency oscillator | 150 kHz internal clock - enables predictable EMI filtering and consistent inductor sizing across designs. |
| Thermal shutdown + current limit | Two-stage protection: peak current limit (2.4–4.0 A) and +150°C junction cutoff - ensures robust fault recovery without external circuitry. |
| Low-IQ standby mode | 90 μA quiescent current in shutdown - extends battery life in portable or always-on monitoring systems. |
| Wide input voltage range | 4.5 V to 60 V operation - supports direct connection to unregulated 12 V, 24 V, and 48 V industrial sources. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Converting 24 V vehicle battery or 48 V telecom bus to clean 3.3 V for MCU and sensors. IC Role / Device Role / Timing Role: Primary non-isolated buck converter providing regulated logic supply with cold-crank tolerance down to 4.5 V. Use Value: Eliminates need for pre-regulator stages; 60 V max input withstands load-dump transients; thermal shutdown prevents failure during under-hood overheating. |
Use Scenario: Powering CAN transceivers, LIN nodes, and door/window ECUs in distributed automotive electronics. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering stable 3.3 V from noisy chassis battery rail. Use Value: 150 kHz switching avoids AM radio band; ON/OFF pin enables synchronized wake-up; ±4% output tolerance meets automotive microcontroller requirements. |
| Programmable Logic Controller (PLC) I/O Module | Outdoor Wireless Sensor Node |
|
Use Scenario: Generating isolated 3.3 V supply for FPGA configuration and digital I/O buffers in industrial automation hardware. IC Role / Device Role / Timing Role: High-current buck stage preceding LDO post-regulation for noise-sensitive logic domains. Use Value: 2 A output supports multiple parallel I/O drivers; 76% efficiency minimizes thermal stress in sealed enclosures; DDPAK package enables compact heatsinking. |
Use Scenario: Battery-powered environmental sensor hub requiring long-life operation with periodic RF transmission bursts. IC Role / Device Role / Timing Role: Main system regulator managing sleep/wake cycles via ON/OFF pin control and low-quiescent standby. Use Value: 90 μA shutdown current extends shelf life; wide input range accommodates aging Li-ion or solar-charged batteries (8–50 V); integrated protection reduces external component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-3.3 | Higher 150 kHz frequency (same), but 3 A output rating and improved 4% output tolerance; uses different pinout (TO-263-5) and lacks ON/OFF pin. | Supports higher current loads but requires PCB redesign due to non-pin-compatible package and missing shutdown control. | Select when >2 A output or tighter thermal performance is required and layout flexibility exists. |
| MP2451DT-LF-Z | 36 V max input, 2 A output, 2 MHz switching frequency, integrated soft-start; smaller SOIC-8 package, no thermal pad. | Better suited for space-constrained designs but cannot replace LM2592HVT-3.3 in 48–60 V input or high-temperature environments. | Select for compact consumer-grade applications where input voltage stays below 36 V and ambient temperature remains <85°C. |
Compared with LM2592HVT-3.3, LM2596S-3.3 offers higher current headroom but sacrifices shutdown control and pin compatibility, while MP2451DT-LF-Z enables miniaturization at the cost of input voltage range and thermal robustness - making LM2592HVT-3.3 optimal for ruggedized 24–60 V industrial and automotive power rails.
Availability
LM2592HVT-3.3 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and programmable logic controller (PLC) modules requiring stable component supply, long-term lifecycle support, and high-reliability DC/DC conversion.
Supply support for LM2592HVT-3.3 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 technologies, with decades of expertise in high-reliability power conversion ICs.
The LM2592HV series was designed specifically for robust, low-component-count buck regulation in harsh environments - targeting industrial controls, automotive subsystems, and telecom infrastructure where wide input range and integrated protection are critical.
FAQ
What is the maximum input voltage rating for the LM2592HVT-3.3?
The LM2592HVT-3.3 has an absolute maximum input voltage rating of 63 V, with guaranteed operation up to 60 V across the full temperature range. This makes LM2592HVT-3.3 suitable for 48 V industrial buses and automotive applications subject to load-dump transients. Operation above 60 V risks permanent damage and is outside the device's specified operating conditions.
Does the LM2592HVT-3.3 require external feedback resistors to set the output voltage?
No - the LM2592HVT-3.3 is a fixed-output variant with internal feedback connection to the output pin, so no external resistors are needed. This eliminates resistor tolerance errors and layout sensitivity, ensuring the specified 3.3 V ±4% output accuracy without calibration. The LM2592HVT-3.3 differs from the adjustable LM2592HV-ADJ, which requires two external resistors to program VOUT.
What thermal package options are available for the LM2592HVT-3.3?
The LM2592HVT-3.3 is offered in two thermally enhanced packages: TO-220 (package code KTT) and DDPAK (package code NDH). Both feature exposed thermal pads and identical 5-pin pinouts. The DDPAK provides lower θJA (as low as 20°C/W with proper PCB copper area), while the TO-220 offers through-hole mounting and simpler heatsink attachment - both support the full 2 A output current with appropriate thermal design.
How does the ON/OFF pin function on the LM2592HVT-3.3?
The ON/OFF pin (Pin 5) enables external control of LM2592HVT-3.3 operation: pulling it to ≥2.0 V places the device in low-power shutdown (IQ ≈ 90 μA), while leaving it floating or pulling it to ≤0.6 V enables normal regulation. The threshold is typically 1.3 V, and the pin tolerates up to +25 V - allowing direct interfacing with microcontroller GPIOs or discrete logic without level-shifting.
Is the LM2592HVT-3.3 RoHS compliant and halogen-free?
Yes - the LM2592HVT-3.3 is manufactured by Texas Instruments in accordance with RoHS Directive 2011/65/EU and is halogen-free per IPC-4101 definition. TI's official product folder and packaging data confirm lead-free terminations, compliant with JEDEC J-STD-020 moisture sensitivity level (MSL) 3 for the DDPAK and MSL 1 for the TO-220 variant. Full compliance documentation is available via TI's Quality & Environmental page.
LM2592HVT-3.3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
LM2592HVT-3.3 FAQ
1.How can I place an order for LM2592HVT-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2592HVT-3.3 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 LM2592HVT-3.3 reliable?
The price and inventory of LM2592HVT-3.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2592HVT-3.3 is usually 5 days.
3.What payment methods are accepted for LM2592HVT-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2592HVT-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2592HVT-3.3?
LM2592HVT-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2592HVT-3.3 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 LM2592HVT-3.3?
For technical support, including LM2592HVT-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2592HVT-3.3 requirements.
6.How does Aetrix verify that LM2592HVT-3.3 is sourced from the original manufacturer or authorized distributors?
All LM2592HVT-3.3 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 LM2592HVT-3.3 meets industry standards.
7.What is the process for return or replacement of LM2592HVT-3.3?
All LM2592HVT-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM2592HVT-3.3, 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 LM2592HVT-3.3 part is unused and in its original packaging.
Return procedure for LM2592HVT-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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