Overview
The LM22678TJE-ADJ/NOPB is a high-performance step-down voltage regulator from Texas Instruments, part of their SIMPLE SWITCHER family. This regulator is designed to provide efficient and reliable voltage regulation with a minimum number of external components. It features a wide input voltage range of 4.5 V to 42 V and can deliver up to 5 A of load current. The device is available in an adjustable output voltage option (-ADJ), allowing output voltages as low as 1.285 V. It incorporates a 100-mΩ N-channel MOSFET, internal loop compensation, and a switching frequency of 500 kHz, making it suitable for various high-voltage applications.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | 42 | V | |
| Output Voltage (ADJ) | 1.285 | V | ||
| Output Voltage (Fixed) | 5.0 | V | ||
| Output Current | 5 | A | ||
| Switching Frequency | 400 | 500 | 600 | kHz |
| Junction Temperature Range | -40 | 125 | °C | |
| Feedback Reference Accuracy | ±1.5% | |||
| Quiescent Current | 3.4 | mA | ||
| Standby Quiescent Current | 25 | 40 | µA | |
| Enable Threshold Voltage (Falling) | 1.3 | 1.6 | 1.9 | V |
| Thermal Shutdown Threshold | 150 | °C |
Key Features
- Wide input voltage range: 4.5 V to 42 V
- Internally compensated voltage mode control
- Stable with low-ESR ceramic capacitors
- 100-mΩ N-channel MOSFET
- Output voltage options: -ADJ (as low as 1.285 V) and -5.0 (fixed to 5 V)
- ±1.5% Feedback reference accuracy
- Switching frequency of 500 kHz
- –40°C to 125°C Operating junction temperature range
- Precision enable pin
- Integrated bootstrap diode and soft start
- Fully WEBENCH enabled
- Automotive-grade option (LM22678-Q1) AEC-Q100 grade 1 qualified
- Thermal shutdown protection
- Current limiting and built-in thermal shutdown
Applications
- Industrial distributed power applications
- Test and measurement equipment
- Appliances
- General-purpose wide VIN applications
Q & A
- What is the input voltage range of the LM22678TJE-ADJ/NOPB?
The input voltage range is from 4.5 V to 42 V.
- What are the output voltage options for the LM22678TJE-ADJ/NOPB?
The output voltage options are -ADJ (as low as 1.285 V) and -5.0 (fixed to 5 V).
- What is the switching frequency of the LM22678TJE-ADJ/NOPB?
The switching frequency is 500 kHz.
- What is the operating junction temperature range of the LM22678TJE-ADJ/NOPB?
The operating junction temperature range is –40°C to 125°C.
- Does the LM22678TJE-ADJ/NOPB have thermal shutdown protection?
Yes, it has internal thermal-shutdown circuitry that activates at about 150°C.
- What type of MOSFET is used in the LM22678TJE-ADJ/NOPB?
A 100-mΩ N-channel MOSFET is used.
- Is the LM22678TJE-ADJ/NOPB suitable for automotive applications?
Yes, the LM22678-Q1 version is AEC-Q100 grade 1 qualified for automotive use.
- What is the quiescent current of the LM22678TJE-ADJ/NOPB?
The quiescent current is typically 3.4 mA.
- Does the LM22678TJE-ADJ/NOPB have a precision enable pin?
Yes, it features a precision enable pin for regulator control and system power sequencing.
- Is the LM22678TJE-ADJ/NOPB compatible with WEBENCH design tools?
Yes, it is fully WEBENCH enabled.
