Overview
The LM317MBTG, produced by onsemi, is an adjustable three-terminal positive voltage regulator. It is capable of supplying more than 1.5 A of load current over an output voltage range of 1.2 V to 37 V. This regulator is exceptionally easy to use, requiring only two external resistors to set the output voltage. The LM317MBTG features internal current limiting, thermal shutdown, and safe operating area compensation, making it highly reliable and protected against overloads and excessive heat.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage Range | 1.2 to 37 | V |
| Output Current | In excess of 1.5 | A |
| Line Regulation | 0.01% (typical) | %/V |
| Load Regulation | 0.1% (typical) | % |
| Input-Output Voltage Differential | -0.3 to 40 | Vdc |
| Thermal Resistance, Junction-to-Ambient | 65 °C/W (TO-220 package) | °C/W |
| Operating Junction Temperature Range | -55 to +150 | °C |
| Storage Temperature Range | -65 to +150 | °C |
Key Features
- Output voltage adjustable between 1.2 V and 37 V using only two external resistors.
- Output current in excess of 1.5 A.
- Internal thermal overload protection and short-circuit current limiting.
- Safe operating area compensation.
- Floating operation for high voltage applications.
- Available in various packages including TO-220, TO-220FP, TO-3, and D2PAK-3.
- Pb-free, halogen-free/BFR-free, and RoHS compliant.
- Optional output capacitor for improved transient response.
- Adjustment terminal can be bypassed to achieve high ripple-rejection ratios.
Applications
- Local, on-card regulation.
- Programmable output regulation.
- Precision current regulation by connecting a fixed resistor between the adjustment and output terminals.
- ATCA solutions.
- DLP: 3D biometrics, hyperspectral imaging, optical networking, and spectroscopy.
- DVR and DVS.
- Desktop PCs.
- Digital signage and still cameras.
- ECG electrocardiograms.
- EV HEV chargers: levels 1, 2, and 3.
- Electronic shelf labels.
- Energy harvesting.
- Ethernet switches.
- Femto base stations.
- Fingerprint and iris biometrics.
- HVAC: heating, ventilating, and air conditioning.
- High-speed data acquisition and generation.
- Hydraulic valves.
- IP phones: wired and wireless.
- Intelligent occupancy sensing.
- Motor controls: brushed DC, brushless DC, low-voltage, permanent magnet, and stepper motors.
- Point-to-point microwave backhauls.
- Power bank solutions.
- Power line communication modems.
- Power over ethernet (PoE).
- Power quality meters.
- Power substation controls.
- Private branch exchanges (PBX).
- Programmable logic controllers.
- RFID readers.
- Refrigerators.
- Signal or waveform generators.
- Software-defined radios (SDR).
- Washing machines: high-end and low-end.
- X-rays: baggage scanners, medical, and dental.
Q & A
- What is the output voltage range of the LM317MBTG?
The output voltage range of the LM317MBTG is adjustable between 1.2 V and 37 V.
- How much output current can the LM317MBTG supply?
The LM317MBTG can supply more than 1.5 A of output current.
- What kind of protection features does the LM317MBTG have?
The LM317MBTG features internal thermal overload protection, short-circuit current limiting, and safe operating area compensation.
- How do you set the output voltage of the LM317MBTG?
The output voltage of the LM317MBTG is set using only two external resistors.
- What packages is the LM317MBTG available in?
The LM317MBTG is available in TO-220, TO-220FP, TO-3, and D2PAK-3 packages.
- Is the LM317MBTG RoHS compliant?
Yes, the LM317MBTG is Pb-free, halogen-free/BFR-free, and RoHS compliant.
- Can the LM317MBTG be used as a precision current regulator?
Yes, by connecting a fixed resistor between the adjustment and output terminals, the LM317MBTG can be used as a precision current regulator.
- What is the typical line regulation of the LM317MBTG?
The typical line regulation of the LM317MBTG is 0.01%.
- What is the typical load regulation of the LM317MBTG?
The typical load regulation of the LM317MBTG is 0.1%.
- What are some common applications of the LM317MBTG?
The LM317MBTG is used in various applications including local on-card regulation, programmable output regulation, and precision current regulation, as well as in ATCA solutions, DVR and DVS, desktop PCs, and more.
