Overview
The LM2931ADT-5.0RK is a part of the LM2931 series of positive fixed and adjustable output voltage regulators produced by onsemi. These regulators are designed to maintain proper regulation with an extremely low input-to-output voltage differential, making them ideal for applications requiring high efficiency and reliability. They are particularly suited for harsh automotive environments and battery-powered industrial and consumer equipment, where extending the useful battery life is crucial.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage Continuous | VI | - | - | 40 | Vdc |
| Transient Input Voltage (≤ 100 ms) | VI(τ) | - | - | 60 | Vpk |
| Output Voltage (Fixed Output) | VO | 4.75 | 5.0 | 5.25 | V |
| Line Regulation | Regline | -2.0 | 10 | -2.0 | mV |
| Load Regulation (IO = 5.0 mA to 100 mA) | Regload | -14 | 50 | -14 | mV |
| Bias Current | IB | 0.4 | 1.0 | 0.4 | mA |
| Dropout Voltage (IO = 10 mA) | VI-VO | 0.015 | 0.2 | 0.015 | V |
| Dropout Voltage (IO = 100 mA) | VI-VO | 0.16 | 0.6 | 0.16 | V |
| Output Current | IO | - | - | 100 | mA |
| Load Dump Protection | - | - | - | 60 V | - |
| Reverse Transient Protection | - | - | - | -50 V | - |
Key Features
- Low input-to-output voltage differential (< 0.6 V @ 100 mA)
- Output current in excess of 100 mA
- Low bias current (0.4 mA at 10 mA output)
- 60 V load dump protection and -50 V reverse transient protection
- Internal current limiting and thermal shutdown
- Temporary mirror-image protection
- Output inhibit pin (on adjustable output regulators)
- Low dropout voltage and high ripple rejection
Applications
The LM2931ADT-5.0RK is designed for use in harsh automotive environments and is also suitable for battery-powered industrial and consumer equipment. It is ideal for applications where extending the useful battery life is desirable, such as in automotive systems, industrial control systems, and consumer electronics.
Q & A
- What is the maximum input voltage for the LM2931ADT-5.0RK?
The maximum continuous input voltage is 40 Vdc, and the transient input voltage can go up to 60 Vpk for ≤ 100 ms.
- What is the output voltage range for the fixed output version?
The output voltage for the fixed output version ranges from 4.75 V to 5.25 V at Vin = 14 V, IO = 10 mA, and TA = 25°C.
- What is the dropout voltage at 100 mA output current?
The dropout voltage at 100 mA output current is between 0.16 V and 0.6 V.
- Does the LM2931ADT-5.0RK have built-in protection features?
Yes, it includes internal current limiting, thermal shutdown, 60 V load dump protection, and -50 V reverse transient protection.
- Can the LM2931ADT-5.0RK be used in automotive applications?
Yes, it is designed to survive in harsh automotive environments and protect against input fault conditions such as reverse battery connection and excessive line transients during load dump.
- What is the purpose of the output inhibit pin on the adjustable output regulators?
The output inhibit pin is useful in microprocessor-based systems and allows for the output to be turned off when necessary.
- How can the output current of the LM2931ADT-5.0RK be boosted?
The output current can be boosted using a PNP transistor, such as the D45VH7, to provide higher current outputs.
- What are the typical applications for the LM2931ADT-5.0RK?
Typical applications include automotive systems, industrial control systems, and battery-powered consumer electronics where extending battery life is important.
- What is the ripple rejection of the LM2931ADT-5.0RK?
The ripple rejection at 120 Hz is 0.10 %/V.
- Is the LM2931ADT-5.0RK available in different package types?
Yes, it is available in various package types including SOIC-8, DPAK, TO-220, and TO-92.
