In today's high-performance portable devices and wireless communication systems, the efficiency, size and integration of power management chips directly affect the life, size and reliability of products. The CXSU63314 series introduced by JTM-IC(jtm-ic.com) is a high-efficiency synchronous PWM boost DC/DC converter optimized for medium power systems. With its high conversion efficiency of 97%, fixed switching frequency of 1.4MHz and advanced automatic PWM/PFM mode switching function, it provides design engineers with a perfect power supply solution with both high performance and small size.
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[ CXSU63314 ]"
In today's high-performance portable devices and wireless communication systems, the efficiency, size and integration of power management chips directly affect the life, size and reliability of products. JTM-IC (jtm-ic.com) launchedCXSU63314Series, which is optimized for medium power systems.High efficiency synchronous PWM boost DC/DC converter, by virtue of itsUp to 97% conversion efficiency,1.4MHz Fixed Switching Frequencyand advancedAutomatic PWM/PFM mode switchingfunction, providing design engineers with the perfect power solution with both high performance and small size.
1. CXSU63314 Product Core Overview
CXSU63314 is a boost regulator with synchronous rectification architecture, which completely eliminates the external Schottky diode required in the traditional Boost circuit, which not only reduces the system cost and PCB area, but also significantly improves the conversion efficiency. It offers two voltage versions to suit different application scenarios:
· CXSU63314H: Support1V to 4.4VWide input voltage range,1V low voltage startcapacity, ideal for single-cell alkaline or NiMH battery applications.
· CXSU63314C: The input voltage range is2V to 4.4V, The starting voltage is 2V, suitable for lithium-ion batteries or other standard power systems.
Both devices are available2.5V to 5VAdjustable output voltage with maximum load current capability up500mA, Fully meet the power requirements of most portable devices.
2. superior performance and key features
2.1 industry-leading efficiency: through integration as low0.35ΩThe CXSU63314 can be realized in typical applications.Up to 97% conversion efficiency, Greatly extend the battery life, reduce the heat.
2.2. Intelligent power management: The chip automatically switches from PWM mode to PFM mode under light load conditions, significantly reducing switching losses. Its turn-off current is only2μA, further optimizing the system standby power consumption.
2.3. High Frequency Switch and Miniaturization：1.4MHzThe fixed switching frequency allows the use of small, low-height inductors (minimum 2.2 μH) and ceramic capacitors, which greatly reduces the footprint of the overall solution and conforms to the trend of light and thin modern electronic products.
2.4. High integration and reliability: The device integrates a complete control logic, error amplifier, oscillator and protection circuit. Adopting a compactSOT-23-6L packageand provide lead-free environmental protection options to meet RoHS standards.
3. a wide range of application scenarios
CXSU63314 high efficiency, high integration and excellent dynamic response make them ideal for the following applications:
· Wireless communication equipment: Such as mobile phones, wireless handheld terminals, DSL modems, etc., provide stable RF or baseband power supply.
· Portable multimedia equipment: including portable media players, digital cameras, MP3 players, handheld computers (PDA), etc.
· Embedded Systems and Modules: Such as PC cards, Internet of Things modules, handheld medical devices and other occasions that require efficient boosting.
· Single battery boost system: Perfect to achieve a single AA battery boost to 3.3V or 5V, for the microcontroller, sensor, display module power supply.
4. Detailed Design Guidelines and Selection Recommendations
To ensure optimal performance of the CXSU63314, JTM-IC provide the following validated design recommendations:
4.1. Inductance selection: It is recommended to use high-frequency ferrite core inductors to reduce losses. For applications with an output voltage ≤ 3.6V, the minimum inductance value is2.2μH; For applications with output voltage> 3.6V, it is recommended to use4.7μHor above. The rated current of the inductor must be able to withstand the internal of the chip.850mAThe peak current is limited without saturation. Table 1 lists several proven recommended inductor models.
4.2. Capacitance selection：
· Output capacitance: Recommended4.7 μF to 22 μFThe low ESR multilayer ceramic capacitor (MLCC),X5R or X7R material is the first choice, they can keep the capacitance value stable in a wide temperature and pressure range, effectively suppress the output ripple.
· Input capacitance: Place a near the VIN pin≥ 10μFThe ceramic capacitor can significantly reduce the switching noise and voltage spikes at the input and improve system stability.
4.3. Feedback resistance setting: The output voltage is set through a resistor divider connected between VOUT and GND and connected to the FB pin. The calculation formula is: VOUT=VFB×[1 (R1/R2)], where VFBTypical values are
1.23V。
4.4. Key Points of PCB Layout：
· Minimization of power loop: The traces connecting VIN, inductor, SW pin and output capacitor should be as far as possibleshort, wide, straightto reduce parasitic inductance and resistance and reduce EMI and switching losses.
· Grounding treatment: Provide large-area grounding copper foil for pins 2 and 3(GND), and direct, low-impedance connection to the negative terminal of the output capacitor. It is best practice to use a separate ground plane.
Sensitive signal isolation: FB feedback traces should be far away from high-frequency noise sources such as inductors and SW, and kept small to reduce noise coupling.
· Thermal considerationsThe use of PCB copper foil to provide a heat dissipation path for the bottom of the chip helps to reduce the working junction temperature and improve long-term reliability.
5. package and product model
CXSU63314 industry-standardSOT-23-6LThe surface mount package has a very small package size, which is very suitable for portable devices with limited space. The JTM-IC provides a complete model selection, which is convenient for customers to purchase according to the input voltage requirements (version H or version C). Detailed package size drawings and pad layout designs are available in the official website technical documentation.
6. epilogue
The CXSU63314 represents the latest JTM-IC effort in high-efficiency synchronous boost conversion technology. It willHigh conversion efficiency, intelligent power management mode, high frequency miniaturization design and powerful load driving capabilityThe integration has set a new benchmark for the power supply design of medium and high power portable equipment. Whether you are developing a new generation of smartphones, wireless modules, or high-performance portable consumer electronics, CXSU63314 can provide you with a reliable, efficient, and compact power core.
Visit the official JTM-IC website immediately (jtm-ic.com）, download CXSU63314 complete datasheets, application notes, reference designs, and PCB layout guides. Our technical support team is ready to provide you with professional design assistance and sample support to help your products win the competition in the fierce market.
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