Overview
The LM337D2TG is an adjustable 3-terminal negative voltage regulator produced by onsemi. It is capable of supplying in excess of 1.5 A over an output voltage range of −1.2 V to −37 V. This regulator is known for its ease of use, requiring only two external resistors to set the output voltage. It features internal current limiting, thermal shutdown, and safe area compensation, making it essentially blow-out proof.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | 1.5 A | A |
| Output Voltage Range | −1.2 V to −37 V | V |
| Input-Output Voltage Differential | 40 Vdc | Vdc |
| Power Dissipation (Case 221A, TA = +25°C) | Internally Limited, 65 W | W |
| Thermal Resistance, Junction-to-Ambient (Case 221A) | 5.0 °C/W | °C/W |
| Operating Junction Temperature Range | −40 to +125 °C | °C |
| Storage Temperature Range | −65 to +150 °C | °C |
| Line Regulation (TA = +25°C, 3.0 V ≤ |VI−VO| ≤ 40 V) | 0.01 to 0.04 %/V | %/V |
| Load Regulation (TA = +25°C, 10 mA ≤ IO ≤ Imax) | 0.3 to 1.0 mV % VO | mV % VO |
| Adjustment Pin Current | 65 to 100 μA | μA |
| Reference Voltage (TA = +25°C, 3.0 V ≤ |VI−VO| ≤ 40 V) | −1.213 to −1.250 V | V |
Key Features
- Output current in excess of 1.5 A
- Output voltage adjustable between −1.2 V and −37 V
- Internal thermal overload protection and short circuit current limiting
- Output transistor safe-area compensation
- Floating operation for high voltage applications
- Eliminates the need for stocking many fixed voltages
- Available in surface mount D2PAK and standard 3-lead transistor package
- Pb-free and RoHS compliant
Applications
The LM337 is versatile and serves a wide variety of applications, including local, on-card regulation. It can be used to make a programmable output regulator or as a precision current regulator by connecting a fixed resistor between the adjustment and output terminals. The device is suitable for high voltage applications and can operate as a floating regulator, making it ideal for various industrial and electronic systems.
Q & A
- What is the output current range of the LM337D2TG?
The LM337D2TG can supply an output current in excess of 1.5 A.
- What is the adjustable output voltage range of the LM337D2TG?
The output voltage is adjustable between −1.2 V and −37 V.
- Does the LM337D2TG have internal protection features?
Yes, it features internal thermal overload protection and short circuit current limiting.
- What is the reference voltage of the LM337D2TG?
The reference voltage is nominally −1.25 V between the output and adjustment terminals.
- Can the LM337D2TG be used in high voltage applications?
Yes, it is designed for floating operation, making it suitable for high voltage applications.
- What are the available packages for the LM337D2TG?
It is available in surface mount D2PAK and standard 3-lead transistor package.
- Is the LM337D2TG Pb-free and RoHS compliant?
Yes, it is Pb-free and RoHS compliant.
- What is the operating junction temperature range of the LM337D2TG?
The operating junction temperature range is −40 to +125 °C.
- How do you set the output voltage of the LM337D2TG?
The output voltage is set using two external resistors (R1 and R2) connected to the adjustment terminal.
- Does the LM337D2TG require a minimum load current to maintain regulation?
Yes, it requires a minimum load current to maintain regulation; if the load current is less than this minimum, the output voltage will rise.
