Overview
The LM337D2TR4G 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
| Specification | 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 936, D2PAK) | 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 adjustable between −1.2 V and −37 V
- Internal thermal overload protection
- Internal short circuit current limiting constant with temperature
- 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 LM337D2TR4G 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 versatile for various electronic systems.
Q & A
- What is the output current range of the LM337D2TR4G?
The LM337D2TR4G can supply an output current in excess of 1.5 A.
- What is the adjustable output voltage range of the LM337D2TR4G?
The output voltage is adjustable between −1.2 V and −37 V.
- Does the LM337D2TR4G have internal protection features?
Yes, it includes internal thermal overload protection and short circuit current limiting.
- What is the thermal resistance of the LM337D2TR4G in the D2PAK package?
The thermal resistance, junction-to-ambient, for the D2PAK package is 5.0 °C/W.
- What is the operating junction temperature range for the LM337D2TR4G?
The operating junction temperature range is −40 to +125 °C.
- How do you set the output voltage of the LM337D2TR4G?
The output voltage is set using two external resistors, R1 and R2, connected between the adjustment terminal and ground.
- Is the LM337D2TR4G suitable for high voltage applications?
Yes, it supports floating operation for high voltage applications.
- What are the package options for the LM337D2TR4G?
It is available in surface mount D2PAK and standard 3-lead transistor packages.
- Is the LM337D2TR4G Pb-free and RoHS compliant?
Yes, it is Pb-free and RoHS compliant.
- What is the reference voltage of the LM337D2TR4G?
The reference voltage is −1.25 V between the output and adjustment terminals.
