LM1921T Texas Instruments Integrated Circuit (Transistor Outline, Vertical) In Stock
The LM1921T is a power distribution switch IC from Texas Instruments designed for high-side load switching with integrated over-current, over-voltage, and thermal protection. It provides up to 1 A peak output current, operates as a source switch in a 5-pin flange-mount transistor outline package for robust power distribution control.
- Manufacturer
- Texas Instruments
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- LM1921T Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- High-side power distribution switch with 1 A peak output current and transient protection
- Integrated over-current, over-voltage, and thermal shutdown protection in a single package
- Source output current flow direction for high-side load switching applications
- 5-pin transistor outline flange-mount package for mechanical mounting and heat sinking
- Robust buffer/inverter-based peripheral driver architecture for reliable load switching
Applications
The LM1921T is used in power supply distribution boards, load switching circuits, and peripheral power management in industrial control systems and embedded computing modules where controlled power sequencing and protection against overloads are required. It is also suitable for driving solenoids, relays, and motor loads in robotics and automation equipment where integrated protection simplifies the overall system design.
Specifications
| YTEOL | 0 |
| Built-in Protections | TRANSIENT; OVER CURRENT; OVER VOLTAGE; THERMAL |
| Interface IC Type | BUFFER OR INVERTER BASED PERIPHERAL DRIVER |
| JESD-30 Code | R-PSFM-T5 |
| Number of Functions | 1 |
| Output Current Flow Direction | SOURCE |
| Output Peak Current Limit-Nom | 1A |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Supply Voltage-Max | 26V |
| Supply Voltage-Min | 4.75V |
| Supply Voltage-Nom | 12V |
| Surface Mount | NO |
| Temperature Grade | AUTOMOTIVE |
| Terminal Form | THROUGH-HOLE |
| Terminal Position | SINGLE |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum output current of the LM1921T?
The LM1921T can deliver up to 1 A peak output current in its source (high-side) switching configuration, making it suitable for powering moderate current loads such as solenoids, small DC motors, and relay coils in industrial control and automation applications.
What protection features are built into the LM1921T?
The LM1921T includes integrated transient protection, over-current limiting, over-voltage protection, and thermal shutdown. These built-in protections eliminate the need for additional external protection components, simplifying the system power distribution design and reducing BOM cost.
What package does the LM1921T use?
The LM1921T is housed in a 5-pin flange-mount transistor outline (TO) package, which allows it to be mechanically bolted to a heatsink or chassis for improved thermal management when switching at high current levels in industrial power distribution applications.
What type of switch is the LM1921T - high-side or low-side?
The LM1921T is a high-side (source) switch with output current flowing from the supply through the device to the load. This configuration is preferred in applications where the load must share a common ground reference while the switch controls the supply rail to the load.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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