Overview
The MAX25262 and MAX25263 are high-performance, synchronous buck converters designed by Analog Devices Inc./Maxim Integrated. These devices are optimized for automotive and industrial applications, offering high efficiency, low noise, and robust protection features. They are capable of delivering up to 2A or 3A of output current, respectively, and operate over a wide input voltage range of 3.5V to 65V.
Key Specifications
| Specification | Value | Notes |
|---|---|---|
| Output Current | 2A (MAX25262), 3A (MAX25263) | |
| Input Voltage Range | 3.5V to 65V | |
| Output Voltage Range | Fixed: 5V, 3.3V; Adjustable: 1V to 20V | Using external resistor-divider |
| Switching Frequency | 400kHz or 2.1MHz | Internally fixed, synchronizable to external clock |
| Minimum On-Time | 20ns (typ) | Guarantees skip-free operation at 2.1MHz and 24Vin |
| Quiescent Current | 5μA (typ) at no load | |
| High-Side Switch On Resistance | 108mΩ to 250mΩ | ILX = 1A, VBIAS = 5V |
| Low-Side Switch On Resistance | 56mΩ to 120mΩ | ILX = 1A, VBIAS = 5V |
| Protection Features | Over temperature, short circuit, under-voltage lockout | |
| Package | Symmetrical flip-chip package | Enhances EMI performance |
Key Features
High Efficiency: Operates at high efficiency with options for 400kHz or 2.1MHz switching frequencies to minimize losses.
Wide Input Voltage Range: Supports input voltages from 3.5V to 65V, making it suitable for various automotive and industrial applications.
Programmable Output Voltage: Offers fixed output voltages of 5V and 3.3V, and adjustable output voltages from 1V to 20V using an external resistor-divider.
EMI Reduction: Features pin-selectable spread spectrum and phase-locked loop (PLL) frequency synchronization to reduce electromagnetic interference.
Protection Features: Includes over temperature, short circuit, and under-voltage lockout protections to improve system reliability.
Low Quiescent Current: Consumes only 5μA of quiescent current at no load, enhancing light-load efficiency.
Applications
Automotive Systems: Ideal for double battery automotive systems, automotive instrument clusters, and navigation and radio head units.
Distributed DC Power Systems: Suitable for distributed power systems requiring high efficiency and reliability.
Industrial Applications: Used in various industrial settings where high-performance DC-DC conversion is necessary.
Q & A
- Q: What is the output current capability of the MAX25262 and MAX25263?
A: The MAX25262 can deliver up to 2A, while the MAX25263 can deliver up to 3A of output current.
- Q: What is the input voltage range of these devices?
A: The input voltage range is from 3.5V to 65V.
- Q: Can the output voltage be adjusted?
A: Yes, the output voltage can be fixed at 5V or 3.3V, or it can be adjusted between 1V and 20V using an external resistor-divider.
- Q: What are the available switching frequencies?
A: The devices operate at either 400kHz or 2.1MHz, and the frequency can be synchronized to an external clock.
- Q: What EMI reduction features are available?
A: The devices feature pin-selectable spread spectrum and phase-locked loop (PLL) frequency synchronization to reduce electromagnetic interference.
- Q: What protection features are included?
A: The devices include over temperature, short circuit, and under-voltage lockout protections.
- Q: How much quiescent current do these devices consume at no load?
A: They consume only 5μA of quiescent current at no load.
- Q: What package type is used for these devices?
A: They come in a symmetrical flip-chip package that enhances EMI performance.
- Q: Are these devices suitable for automotive applications?
A: Yes, they are AEC-Q100 qualified and suitable for various automotive applications.
- Q: Can these devices operate in skip mode or fixed-frequency PWM mode?
A: Yes, they can operate in either skip mode for reduced current consumption or in fixed-frequency PWM mode to eliminate frequency variation and minimize EMI.
