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Product Detailed Parameters
- Description：IC REG LINEAR NEG ADJ 1.5A TO3
- Series：-
- Mfr：STMicroelectronics
- Package：Bulk
- Output Configuration：Negative
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：-1.2V
- Voltage - Output (Max)：-37V
- Voltage Dropout (Max)：-
- Current - Output：1.5A
- Current - Quiescent (Iq)：-
- Current - Supply (Max)：-
- PSRR：77dB ~ 60dB (120Hz)
- Control Features：-
- Protection Features：Over Temperature, Short Circuit
- Operating Temperature：-25°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-204AA, TO-3
- Supplier Device Package：TO-3
- Grade：-
- Qualification：-
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Overview
The LM237K is a three-terminal adjustable negative voltage regulator from STMicroelectronics. It delivers an output current exceeding 1.5A across an adjustable output voltage range of -1.2V to -37V. The device features typical load regulation of 0.3%/V and line regulation of 0.01%/V. Ripple rejection is rated at 77dB, with a temperature coefficient of 50ppm/°C. Internal protections include current limiting, thermal overload shutdown, and safe area protection.
Feature Summary
- Adjustable output voltage capability spanning from -1.2V to -37V using only two external resistors
- Integrated comprehensive overload protection including current limit, thermal shutdown, and safe area operation
- High ripple rejection ratio ensuring stable performance against input noise
- Standard three-lead transistor package design for straightforward mounting
Applications
- Negative power supply rails in general electronic equipment
- Battery-powered systems requiring stable negative voltage references
- Industrial control circuits needing adjustable negative bias
- Test and measurement instrumentation power supplies
Procurement Notes
Verify the specific suffix designation for the LM237K variant, as availability may vary by manufacturer. Confirm RoHS compliance status and lead times directly with authorized distributors or STMicroelectronics sales representatives. Ensure the ordering part number matches the required package type and temperature range specifications for your application.
Selection Notes
Select this component when a reliable negative adjustable voltage source is required with high current capacity. The LM237K offers superior line and load regulation compared to standard fixed regulators. Consider the thermal management requirements given the TO-220 package style and the potential power dissipation under heavy load conditions.
Part Context
The LM237 belongs to the LM137 series of three-terminal adjustable negative voltage regulators. This family provides a robust solution for applications requiring precise negative voltage control. The device complements positive regulator counterparts like the LM317, offering symmetric design options for dual-rail power supplies in various industrial and commercial electronics.
Replacement Considerations
Direct replacements include the LM337 series for similar functionality. Verify pinout compatibility and thermal characteristics when substituting. Check datasheet specifications for output current and voltage ranges to ensure equivalent performance in the target circuit design.
