CXSU63311 integration of a 0.08Ω N-channel MOSFET switch and a 0.12Ω P-channel synchronous rectifier allows for up to 93% conversion efficiency without the need for an external Schottky diode. Its fixed 550KHz switching frequency combined with PSM (power saving mode) at light load ensures efficient operation over the full load range. The device also has an internal anti-ringing switch, which effectively suppresses interference and radiated electromagnetic energy in intermittent working mode, and improves system stability.
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[ CXSU63311 ]"
In today's era of rapid development of portable electronic devices, efficient power management chip has become the key to improve the equipment life and stability. As a high-performance, fixed-frequency step-up DC/DC converter, CXSU63311 has become an ideal choice for various portable device power systems due to its high conversion efficiency of 93% and compact package design. This article provides an in-depth introduction to the core features, application scenarios, and design recommendations of the CXSU63311 to help engineers achieve better power management solutions in their projects.
First, the CXSU63311 overview
The CXSU63311 is a current-mode PWM boost converter with a fixed operating frequency of 550KHz and a wide input voltage range of 2.5V to 5.5V. It is suitable for low-voltage power systems such as single-cell lithium batteries. The chip integrates a 0.08Ω N-channel MOSFET switch and a 0.12Ω P-channel synchronous rectifier, eliminating the need for an external Schottky diode, significantly improving system efficiency and maintaining excellent performance especially at light load. It is packaged in SOT-23-6 and is compact, making it ideal for space-constrained portable applications.
Second, the core characteristics and advantages
2.1. High efficiency and low power consumption
CXSU63311 can achieve up to 93% conversion efficiency in typical applications, thanks to its low on-resistance integrated MOSFET and synchronous rectification technology. Under light load conditions, the chip automatically enters PSM (power saving mode) to further reduce power consumption and extend battery life.
2.2. Comprehensive protection function
The chip has built-in multiple protection mechanisms, including over-temperature protection, output over-voltage protection, short-circuit protection, etc., to ensure that the system can still operate safely under various abnormal conditions. Its soft start function can also effectively suppress the current impact during startup and improve system reliability.
2.3. Stable output performance
Through the external voltage divider resistor, the output can be adjusted to a maximum of 5.25V, and the feedback voltage accuracy reaches 2%. With good load and linear adjustment rate, the output voltage is stable and reliable to meet the needs of various precision equipment.
Three, typical application scenarios
CXSU63311 are widely used in the following areas:
· Portable mobile power: Provide efficient and stable boost output for mobile phones, tablets and other devices.
· Wireless communication equipmentSuch as Bluetooth module, LoRa terminal, etc., to ensure its stable work in a wide voltage range.
· Handheld instrument and GPS receiver: Achieve long-term, low-noise power management in a battery-powered environment.
· Internet of Things terminal equipmentSuitable for all kinds of low power consumption, small size embedded system.
Four, design points and suggestions
4.1. Output voltage setting
The output voltage can be flexibly adjusted through external voltage dividing resistors R1 and R2. It is recommended that R2 be 800kΩ, and R1 is calculated according to the formula:
Ensure that the divided current is much larger than the FB pin input current to maintain accuracy.
4.2. Selection of Inductance and Capacitor
The inductance value should be calculated according to the input and output voltage, ripple current and switching frequency. Generally, it is recommended that the ripple current should not exceed 20% of the average current. Low ESR ceramic capacitors should be preferred for output capacitors to reduce output voltage ripple and improve transient response.
4.3. PCB Layout Recommendations
In order to reduce noise and interference, it is recommended to place key components such as input and output capacitors and inductors as close to the chip as possible, and use wide and short traces for high current paths. The feedback voltage dividing resistor should also be close to the chip, and the grounding node should be planned uniformly to reduce the influence of ground noise.
5 Why choose CXSU63311?
With its high efficiency, high integration and excellent protection function, CXSU63311 has shown significant advantages in the design of portable power supply. Whether it is for mobile power, handheld devices or Internet of Things terminals, it can provide stable, efficient and safe power solutions. As a JTM-IC (jtm-ic.com) One of the key power management chips launched, the CXSU63311 has passed a number of strict tests, with a good market reputation and technical support, is a reliable choice for engineers in power design.
Six, the package and pin function
Seven,Conclusion
With the increasing demand for power management in portable devices, CXSU63311 are becoming the chip of choice in more and more projects because of their excellent performance and flexible design options. For more technical details, samples or design support, please visit JTM-IC official website (jtm-ic.com) or contact our technical team. We are committed to providing customers with high-quality integrated circuit solutions to help your products stand out in the market.
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