Overview
The LM22676MR-ADJ/NOPB is a high-efficiency step-down (buck) voltage regulator produced by Texas Instruments. It is part of the SIMPLE SWITCHER® family, designed to provide an easy-to-use solution for implementing efficient high-voltage step-down regulators with a minimum number of external components. This regulator incorporates a 42 V N-channel MOSFET switch capable of providing up to 3 A of load current, ensuring excellent line and load regulation along with high efficiency (> 90%). The device features voltage mode control, internal loop compensation, and a switching frequency of 500 kHz, allowing for small external components and good transient response.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | 42 | V | |
| Output Current | 3 | A | ||
| Output Voltage Options | 1.285 (ADJ) | 5.0 (Fixed) | V | |
| Switching Frequency | 400 | 500 | 600 | kHz |
| Operating Junction Temperature Range | –40 | 125 | °C | |
| Feedback Reference Accuracy | ±1.5% | |||
| Switch On-Resistance (PFM Package) | 0.12 | 0.16 | 0.22 | Ω |
| Switch On-Resistance (SO PowerPAD Package) | 0.10 | 0.16 | 0.20 | Ω |
| Quiescent Current | 3.4 | 4.2 | 5.3 | mA |
| Standby Quiescent Current | 25 | 40 | µA | |
| Current Limit | 3.35 | 5.5 | A |
Key Features
- Wide Input Voltage Range: 4.5 V to 42 V
- Internally Compensated Voltage Mode Control
- Stable with Low ESR Ceramic Capacitors
- Output Voltage Options: ADJ (as low as 1.285 V) and Fixed 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 Boot-Strap Diode and Soft-Start
- Fully WEBENCH® Enabled for easy design and simulation
- Automotive Grade Product (LM22676Q) AEC-Q100 Grade 1 Qualified
- SO PowerPAD (Exposed Pad) and PFM (Exposed Pad) packages available
Applications
- Industrial Control Systems
- Telecom and Datacom Systems
- Embedded Systems
- Conversions from Standard 24 V, 12 V, and 5 V Input Rails
Q & A
- What is the input voltage range of the LM22676MR-ADJ/NOPB?
The input voltage range is from 4.5 V to 42 V.
- What is the maximum output current of the LM22676MR-ADJ/NOPB?
The maximum output current is up to 3 A.
- What are the output voltage options for the LM22676MR-ADJ/NOPB?
The output voltage options include adjustable (as low as 1.285 V) and fixed 5 V.
- What is the switching frequency of the LM22676MR-ADJ/NOPB?
The switching frequency is 500 kHz.
- What is the operating junction temperature range of the LM22676MR-ADJ/NOPB?
The operating junction temperature range is –40°C to 125°C.
- Does the LM22676MR-ADJ/NOPB have built-in thermal shutdown and current limiting?
Yes, it has built-in thermal shutdown and current limiting to protect against accidental overloads.
- Is the LM22676MR-ADJ/NOPB compatible with low ESR ceramic capacitors?
Yes, it is stable with low ESR ceramic capacitors.
- What is the quiescent current of the LM22676MR-ADJ/NOPB in normal operation?
The quiescent current is typically 4.2 mA.
- Does the LM22676MR-ADJ/NOPB have an integrated soft-start feature?
Yes, it has a built-in soft-start feature with a typical duration of 500 µs.
- Is the LM22676MR-ADJ/NOPB fully WEBENCH® enabled?
Yes, it is fully WEBENCH® enabled for easy design and simulation.
