Overview
The LM22677TJE-ADJ/NOPB is a high-performance step-down DC/DC switching regulator produced by Texas Instruments. It is part of the SIMPLE SWITCHER family, designed to provide an efficient and easy-to-use solution for high-voltage step-down (buck) regulation. This regulator can operate with a wide input voltage range of 4.5 V to 42 V and can deliver up to 5 A of load current. It features excellent line and load regulation, high efficiency (> 90%), and a variety of output voltage options, including adjustable and fixed outputs. The LM22677 is ideal for applications requiring reliable, high-current power conversion with minimal external components.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.5 V to 42 V |
| Output Current | Up to 5 A |
| Output Voltage Options | -ADJ (as low as 1.285 V), -5.0 (fixed to 5 V) |
| Switching Frequency | 500 kHz (default), adjustable from 200 kHz to 1 MHz |
| Operating Junction Temperature Range | -40°C to +125°C |
| Package | TO-263 (NDR) with 7 pins |
| MOSFET Resistance | 100-mΩ N-Channel MOSFET |
| Feedback Reference Accuracy | ±1.5% |
| Shutdown Current | 25 µA (typical) |
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
- Adjustable and Fixed Output Voltage Options
- ±1.5% Feedback Reference Accuracy
- Default Switching Frequency of 500 kHz, adjustable from 200 kHz to 1 MHz
- Frequency Synchronization Capability
- Precision Enable Input
- Integrated Boot-Strap Diode and Soft-Start
- Fully WEBENCH Enabled for easy design and simulation
- AEC-Q100 Grade 1 Qualified for Automotive Applications (LM22677-Q1)
- Thermal Shutdown and Current Limiting for Overload Protection
Applications
The LM22677TJE-ADJ/NOPB is suitable for a wide range of applications requiring high-current, high-efficiency power conversion. These include:
- Automotive Systems: Due to its AEC-Q100 Grade 1 qualification, it is ideal for automotive applications where reliability and high temperature operation are critical.
- Industrial Power Supplies: It can be used in industrial power supplies where high efficiency and reliability are essential.
- Telecommunications: Suitable for telecom equipment requiring stable and efficient power conversion.
- Consumer Electronics: Can be used in various consumer electronics where compact, efficient power solutions are needed.
Q & A
- What is the input voltage range of the LM22677TJE-ADJ/NOPB?
The input voltage range is from 4.5 V to 42 V.
- What is the maximum output current of the LM22677TJE-ADJ/NOPB?
The maximum output current is up to 5 A.
- What are the output voltage options for the LM22677TJE-ADJ/NOPB?
The output voltage options include adjustable (as low as 1.285 V) and fixed (5 V).
- What is the default switching frequency of the LM22677TJE-ADJ/NOPB?
The default switching frequency is 500 kHz, but it can be adjusted from 200 kHz to 1 MHz.
- Does the LM22677TJE-ADJ/NOPB support frequency synchronization?
- What is the operating junction temperature range of the LM22677TJE-ADJ/NOPB?
The operating junction temperature range is from -40°C to +125°C.
- Is the LM22677TJE-ADJ/NOPB suitable for automotive applications?
- What protection features does the LM22677TJE-ADJ/NOPB have?
- How much current does the LM22677TJE-ADJ/NOPB draw in shutdown mode?
- Is the LM22677TJE-ADJ/NOPB compatible with the TI WEBENCH tool?
