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MAX8891EXK45+
Product Overview
Category:
Voltage Regulator
Use:
The MAX8891EXK45+ is a low-dropout linear voltage regulator designed to deliver up to 500mA continuous current with low dropout voltage. It is specifically designed for use in battery-powered devices and other applications where extended battery life is crucial.
Characteristics:
- Low dropout voltage
- High PSRR (Power Supply Rejection Ratio)
- Low output noise
- Thermal shutdown protection
Package:
The MAX8891EXK45+ is available in a compact, thermally-enhanced, 5-pin SC70 package.
Essence:
The essence of the MAX8891EXK45+ lies in its ability to provide stable and regulated power supply even when the input voltage is close to the output voltage, making it ideal for battery-powered applications.
Packaging/Quantity:
The MAX8891EXK45+ is typically available in reels with 3000 units per reel.
Specifications
- Input Voltage Range: 2.5V to 5.5V
- Output Voltage: 4.5V
- Dropout Voltage: 120mV at 100mA
- Quiescent Current: 40µA
- Operating Temperature Range: -40°C to +85°C
Detailed Pin Configuration
The MAX8891EXK45+ features the following pin configuration: 1. IN: Input 2. GND: Ground 3. FB: Feedback 4. SHDN: Shutdown 5. OUT: Output
Functional Features
- Low dropout voltage allows for efficient regulation even with small input-output differentials.
- High PSRR ensures minimal output voltage variation in response to input voltage fluctuations.
- Thermal shutdown protection prevents the device from overheating under abnormal operating conditions.
Advantages and Disadvantages
Advantages
- Low dropout voltage enables efficient power conversion.
- Small package size makes it suitable for space-constrained applications.
- Thermal shutdown protection enhances device reliability.
Disadvantages
- Limited maximum output current compared to some higher-power regulators.
- Restricted input voltage range may not be suitable for all applications.
Working Principles
The MAX8891EXK45+ operates by comparing the feedback voltage with an internal reference to regulate the output voltage. When the input voltage approaches the output voltage, the low dropout voltage characteristic ensures that the device can still maintain a stable output.
Detailed Application Field Plans
The MAX8891EXK45+ is well-suited for various battery-powered applications, including: - Portable medical devices - Handheld instruments - Battery-powered sensors - Wearable devices
Detailed and Complete Alternative Models
Some alternative models to the MAX8891EXK45+ include: - MAX8891EXK33+: Similar characteristics but with a 3.3V output voltage - MAX8891EXK50+: Similar characteristics but with a 5.0V output voltage - LT1763: Low dropout linear regulator with adjustable output voltage
In conclusion, the MAX8891EXK45+ offers a compact and efficient solution for low-dropout voltage regulation in battery-powered devices, making it a valuable component in various portable and handheld applications.
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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van MAX8891EXK45+ in technische oplossingen
What is the MAX8891EXK45+?
- The MAX8891EXK45+ is a high-efficiency, low-noise, synchronous step-down DC-DC converter with an integrated inductor, designed to provide a compact power solution for portable devices.
What is the input voltage range of the MAX8891EXK45+?
- The input voltage range of the MAX8891EXK45+ is 2.5V to 5.5V.
What is the output voltage range of the MAX8891EXK45+?
- The MAX8891EXK45+ provides a fixed output voltage of 4.5V.
What is the maximum output current of the MAX8891EXK45+?
- The MAX8891EXK45+ can deliver up to 500mA of continuous output current.
What are the key features of the MAX8891EXK45+?
- The key features of the MAX8891EXK45+ include high efficiency, low quiescent current, integrated inductor, and thermal shutdown protection.
What applications is the MAX8891EXK45+ suitable for?
- The MAX8891EXK45+ is suitable for a wide range of portable and battery-powered applications, including smartphones, tablets, portable media players, and handheld instruments.
Does the MAX8891EXK45+ require external components for operation?
- No, the MAX8891EXK45+ integrates the inductor and requires minimal external components for operation, making it ideal for space-constrained designs.
What is the typical efficiency of the MAX8891EXK45+?
- The MAX8891EXK45+ offers high efficiency, typically achieving over 90% under typical operating conditions.
What is the operating temperature range of the MAX8891EXK45+?
- The MAX8891EXK45+ is designed to operate over a temperature range of -40°C to +85°C.
Is the MAX8891EXK45+ available in a lead-free package?
- Yes, the MAX8891EXK45+ is available in a lead-free, RoHS-compliant package, making it environmentally friendly and compatible with modern manufacturing requirements.