LM337LZ

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LM337LZ

IC REG LIN NEG ADJ 100MA TO92-3

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  • Mfr.부분 #LM337LZ
  • 패키지
  • 데이터시트 LM337LZ DataSheet
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사양

Part Status Active
Output Configuration Negative
Output Type Adjustable
Number of Regulators 1
Voltage - Input (Max) -40V
Voltage - Output (Min/Fixed) -1.2V
Voltage - Output (Max) -37V
Current - Output 100mA
Current - Quiescent (Iq) 5 mA
PSRR 80dB ~ 65dB (120Hz)
Protection Features Over Current, Over Temperature, Short Circuit
Operating Temperature -25°C ~ 125°C (TJ)
Mounting Type Through Hole
Package / Case TO-226-3, TO-92-3 (TO-226AA)
Supplier Device Package TO-92-3

개요

Description

The LM337LZ is a versatile adjustable voltage regulator designed to provide negative voltage outputs ranging from -1.25V to -37V. It is widely used in various applications, such as power supplies, signal processing circuits, and voltage reference systems. This linear regulator can supply up to 1.5A of output current, making it suitable for a range of electronic devices.
Key features include a high degree of accuracy, low dropout voltage, and thermal overload protection. The LM337LZ has three terminals: input, output, and adjustment, allowing users to set the desired output voltage with external resistors. Its output voltage can be fine-tuned for specific needs, making it ideal for custom circuits.
The device operates efficiently across a wide temperature range and is encapsulated in a TO-220 package, facilitating heat dissipation. Overall, the LM337LZ is a reliable choice for designers requiring adjustable negative voltage solutions in their projects.

Features

The LM337LZ is a low-dropout adjustable voltage regulator designed for a range of applications. Key features include:
1. Output Voltage Range: Adjustable output voltage from -1.25V to -37V.
2. Current Capability: Provides output current up to 1.5A.
3. Low Dropout Voltage: Typically 1.25V dropout, allowing it to operate efficiently with minimal input-output voltage difference.
4. Precision Regulation: Offers good load and line regulation, ensuring stable performance.
5. Thermal Protection: Built-in thermal shutdown feature protects against overheating.
6. Short-Circuit Protection: Includes current limiting to safeguard the device from damage.
7. Compact Package: Available in a TO-220 or surface mount package, facilitating integration into space-constrained designs.
8. Wide Operating Temperature Range: Suitable for use in environments ranging from -40°C to +125°C.
These features make the LM337LZ ideal for applications requiring a reliable adjustable negative voltage supply in consumer electronics, industrial systems, and automotive applications.

Package

The LM337LZ is typically packaged in a TO-220 format. This package type features good thermal performance and is commonly used for voltage regulator applications, allowing for efficient heat dissipation.

Pinout

The LM337LZ is an adjustable negative voltage regulator with a pin count of 3. Its pin functions are as follows:
1. Adjust (ADJ): This pin is used to set the output voltage by connecting a resistor divider from the output to this pin and ground. It allows for adjustable output voltage.
2. Output (VOUT): This pin provides the regulated negative output voltage to the load.
3. Input (VIN): This pin receives the unregulated negative voltage input. The input voltage must be more negative than the desired output voltage.
The LM337LZ typically provides an output voltage range from -1.25V to -37V and can supply a maximum output current of around 1.5A. It is commonly used in power supply applications requiring adjustable negative voltages.

Manufacturer

The LM337LZ is manufactured by Texas Instruments (TI), a prominent American technology company. Founded in 1951, Texas Instruments designs and produces semiconductors and various integrated circuits, which are essential components in electronics. The company is known for its innovation in analog and digital signal processing, as well as its broad portfolio that includes microcontrollers, processors, and sensors. TI serves a wide range of industries, including automotive, industrial, communications, and consumer electronics. The LM337LZ itself is a voltage regulator specifically designed for adjustable negative voltage applications.

Application

The LM337LZ is a low-dropout adjustable voltage regulator commonly used in power supply circuits to provide negative output voltages. Its application areas include programmable power supplies, battery chargers, precision voltage references, and linear voltage regulation in various electronic devices. It's also utilized in audio equipment, instrumentation, and industrial control systems where stable negative voltage is required.

Equivalent

The LM337LZ is a low dropout adjustable voltage regulator. Equivalent products include:
1. LM317 (higher current capacity)
2. LT1085 (low dropout, adjustable)
3. LM1084 (higher current with low dropout)
4. LM338 (higher current variant)
5. LM1117 (low dropout, fixed/adjustable options)
Ensure to check specifications for specific use cases.

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