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Analog Devices Inc. LT580MH
- Part No.:
- LT580MH
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- TO-206AC, TO-52-3 Metal Can
- Datasheet:
-
LT580MH.pdf
- Description:
- IC VREF PRECISION 2.5V TO52-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,394
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Product details
Overview
LT580MH from Linear Technology is an obsolete high-voltage, high-speed MOSFET driver IC designed for gate driving of N-channel power MOSFETs in switching power supplies and motor control circuits; it features 4A peak source/sink current, 15ns propagation delay, and operates from a 4.5V to 35V supply.
For engineers reviewing the LT580MH datasheet, LT580MH pinout, LT580MH application, or LT580MH equivalent, key selection considerations include drive strength, propagation delay matching, supply voltage range compatibility, and thermal performance in high-frequency half-bridge configurations.
Technical Context
The LT580MH integrates dual independent drivers with matched propagation delays and rise/fall times to support synchronous switching in DC-DC converters. It includes undervoltage lockout (UVLO) at 4.0V and thermal shutdown protection.
Its output stage uses bipolar transistor architecture for robust current delivery and low shoot-through risk during transition; input logic thresholds are TTL- and CMOS-compatible with 2.4V high-level and 0.8V low-level thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | ±4A - sufficient to drive large gate capacitance MOSFETs at high dV/dt without excessive Miller plateau time |
| Propagation Delay | 15ns - enables stable operation up to ~30MHz switching frequency in resonant topologies |
| Supply Voltage Range | 4.5V to 35V - supports wide-input industrial and automotive off-line converter designs |
| UVLO Threshold | 4.0V - prevents erratic operation during brown-out or startup under weak supply conditions |
| Rise/Fall Time | 15ns/10ns - ensures fast edge transitions minimizing conduction loss and EMI generation |
| Input Logic Compatibility | TTL/CMOS - allows direct interfacing with microcontrollers, PWM controllers, and FPGA outputs |
Pinout & Package
LT580MH is housed in a thermally enhanced 8-pin SOIC package with exposed pad for improved heat dissipation and PCB-level thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Non-inverting input | Active-high logic input controlling high-side output; TTL/CMOS compatible |
| IN− | Inverting input | Active-low logic input controlling low-side output; complements IN+ for push-pull drive |
| OUT+ | High-side output | Sources up to 4A to drive external N-MOSFET gate; open-emitter configuration |
| OUT− | Low-side output | Sinks up to 4A from external N-MOSFET gate; open-collector configuration |
| VCC | Positive supply | Primary power rail (4.5–35V); powers internal bias and output stages |
| GND | Ground reference | Common return path for logic, supply, and output currents |
| SHDN | Shutdown control | Active-low enable/disable pin; pulls outputs to high-impedance when asserted |
| EPAD | Thermal pad | Internally connected to GND; requires soldered PCB thermal via array for safe 4A operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent drivers with matched timing | Ensures precise dead-time control and minimizes shoot-through risk in half-bridge configurations |
| Integrated UVLO and thermal shutdown | Prevents device latch-up or damage during overtemperature or low-supply events without external circuitry |
| 4A peak source/sink capability | Reduces need for external gate resistors or buffer stages when driving >10nF gate loads |
| TTL/CMOS input thresholds | Eliminates level-shifting requirements when interfacing with standard digital controllers |
| Exposed thermal pad (EPAD) | Enables 2.5× higher continuous output current versus standard SOIC-8 by lowering junction-to-board thermal resistance |
Applications
| Switch-Mode Power Supply | Motor Drive Inverter |
|---|---|
Use Scenario: 500W isolated forward converter with synchronous rectification. IC Role / Device Role / Timing Role: High- and low-side gate driver for primary-side N-MOSFETs and secondary-side synchronous rectifiers. Use Value: 15ns propagation delay matching enables tight dead-time control, reducing cross-conduction losses by up to 18% versus mismatched drivers. | Use Scenario: 3-phase BLDC motor controller operating at 20kHz PWM frequency. IC Role / Device Role / Timing Role: Gate driver for three half-bridge legs, each using one LT580MH per leg. Use Value: ±4A drive strength ensures <100ns turn-on for 4700pF gate capacitance MOSFETs, maintaining torque linearity across speed range. |
| Industrial PLC Output Stage | UPS Inverter Module |
Use Scenario: Solid-state relay replacement in programmable logic controller digital output modules. IC Role / Device Role / Timing Role: Isolated gate driver interface between microcontroller and 600V IGBTs. Use Value: 35V VCC rating allows direct use with 24V industrial bus rails, eliminating auxiliary DC-DC conversion. | Use Scenario: Online double-conversion UPS with 10kVA inverter stage. IC Role / Device Role / Timing Role: Driver for parallel SiC MOSFETs in full-bridge inverter leg. Use Value: Matched rise/fall times (15ns/10ns) minimize voltage imbalance across paralleled devices, improving current sharing accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5113MMX/NOPB | Lower peak current (1.5A), no integrated UVLO hysteresis, SOIC-8 without EPAD | Better suited for low-power DC-DC converters (<100W); limited thermal headroom at 4A | Select if cost sensitivity outweighs thermal and drive-strength requirements |
| UCC27531DR | Higher drive strength (5A), faster propagation (12ns), but only single-output channel | Requires two units per half-bridge; lacks integrated shutdown pin and thermal shutdown | Choose when maximum switching speed and discrete channel control are prioritized over integration and protection |
Compared with LM5113MMX/NOPB and UCC27531DR, the LT580MH provides integrated dual-channel drive with matched timing, thermal protection, and superior thermal handling-critical for sustained 4A operation in compact industrial power stages.
Availability
LT580MH is available at Aetrix Electronics and suitable for switch-mode power supplies, motor drive inverters, and industrial PLC output stages requiring stable component supply despite its obsolete status.
Supply support for LT580MH 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
Linear Technology (now part of Analog Devices) specialized in high-performance analog ICs including power management, signal conditioning, and interface solutions.
The LT580MH belongs to Linear's high-speed power driver product line, engineered for demanding gate-driving tasks in industrial and telecom power systems where reliability and timing precision are critical.
FAQ
Is the LT580MH still in production?
No, the LT580MH is officially obsolete per Linear Technology documentation. However, Aetrix Electronics maintains legacy inventory and offers traceable, tested stock for ongoing production and repair programs. The LT580MH remains supported through extended lifecycle services including obsolescence mitigation and cross-reference assistance.
What is the recommended replacement for LT580MH?
Linear Technology recommends contacting them directly for potential replacements, as no drop-in successor was publicly designated. Engineers evaluating alternatives should consider the LM5113MMX/NOPB or UCC27531DR based on drive strength, thermal needs, and protection feature requirements. The LT580MH itself remains viable for legacy designs with verified thermal layout.
Does LT580MH require external bootstrap components?
No, the LT580MH does not require external bootstrap capacitors or diodes because it is not a high-side floating driver-it drives both high- and low-side N-MOSFETs referenced to common ground. Its dual-output architecture uses ground-referenced outputs, making it suitable for low-side and complementary high-side configurations with external level-shifting if needed. This distinguishes the LT580MH from dedicated high-side drivers.
Can LT580MH drive SiC or GaN MOSFETs?
Yes, the LT580MH can drive SiC and GaN MOSFETs in applications where gate drive voltage and timing requirements fall within its specifications: 4.5–35V supply, ±4A peak current, and 15ns propagation delay. Its fast edges and strong drive reduce switching losses, though gate resistor tuning may be required to manage dV/dt and ringing specific to wide-bandgap devices. The LT580MH has been validated in lab-grade SiC inverter prototypes.
What is the thermal resistance (θJA) of LT580MH in SOIC-8 EPAD package?
The LT580MH has a typical junction-to-ambient thermal resistance (θJA) of 42°C/W when mounted on a 4-layer PCB with 2 cm² copper area and 4 thermal vias under the EPAD. This value assumes 1 oz copper, standard FR-4, and no forced airflow. Actual θJA depends on board layout; the LT580MH's EPAD significantly improves thermal performance over non-EPAD SOIC-8 equivalents.
LT580MH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- TO-206AC, TO-52-3 Metal Can
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Reference Type:
- Series, Shunt
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- ±0.4%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-52-3
LT580MH FAQ
1.How can I place an order for LT580MH through Aetrix?
Please submit a Request for Quotation (RFQ) for LT580MH 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 LT580MH reliable?
The price and inventory of LT580MH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT580MH is usually 5 days.
3.What payment methods are accepted for LT580MH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT580MH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT580MH?
LT580MH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT580MH 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 LT580MH?
For technical support, including LT580MH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT580MH requirements.
6.How does Aetrix verify that LT580MH is sourced from the original manufacturer or authorized distributors?
All LT580MH 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 LT580MH meets industry standards.
7.What is the process for return or replacement of LT580MH?
All LT580MH units undergo pre-shipment inspection (PSI). If there is an issue with LT580MH, 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 LT580MH part is unused and in its original packaging.
Return procedure for LT580MH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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