CXSU63312 is a step-up switching regulator with an integrated 0.5Ω power MOSFET in a compact 5-pin SOT23-5 package, saving PCB space. Its wide input voltage range of 2.5V to 5.5V, and can provide up to 28V output voltage, especially suitable for single lithium battery or 5V power supply system to generate high voltage bias power supply application scenarios. Multiple protection functions such as soft start, overcurrent protection, undervoltage lockout and thermal shutdown are integrated inside the device to ensure stable and reliable operation of the system under various abnormal conditions.
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[ CXSU63312 ]"
In today's electronic equipment market where power efficiency and volume are increasingly demanding, efficient, compact and reliable DC-DC boost converters are the first choice for many design engineers. JTM-IC (jtm-ic.com) in-depth analysis of a high-performance solution for you--CXSU63312, which is a constant frequency, current mode control architecture boost converter optimized for miniaturized, low power applications.
1. CXSU63312 Core Overview
CXSU63312 is a step-up switching regulator with an integrated 0.5Ω power MOSFET in a compact 5-pin SOT23-5 package, saving PCB space. Its wide input voltage range2.5V to 5.5Vand can provide up28V output voltage, Especially suitable for application scenarios where a medium and high voltage bias power supply is generated by a single lithium battery or a 5V power supply system. Multiple protection functions such as soft start, overcurrent protection, undervoltage lockout and thermal shutdown are integrated inside the device to ensure stable and reliable operation of the system under various abnormal conditions.
2. outstanding performance characteristics
2.1. Ultra high efficiency and low power consumption: CXSU63312 under typical load efficiency can exceed85%Its quiescent current is only40μA(PFM mode), which automatically switches to pulse frequency modulation mode at light loads, further extending the battery life of battery-powered equipment.
2.2. High Frequency Switches and Miniaturized Peripherals: Fixed1.2MHzThe switching frequency allows the use of small inductors (recommended 4.7μH to 22μH) and ceramic capacitors, and the inductor height can be as low as 2mm, which is very suitable for space-constrained applications such as mobile phones, digital cameras, and portable medical devices.
2.3. Strong driving and protection ability: Internal Integration1.5AThe switching current is limited and provides ample output capability. Complete protection mechanisms include input under-voltage lockout, cycle-by-cycle current limit, and thermal overload protection for full IC and system security.
2.4. Simplify the design: Internal integration of the compensation network, greatly simplifying the external circuit design. The output voltage can be flexibly set through a simple resistor divider network, and the design formula is VOUT= 1.2V ×(1 R1/R2).
3. a wide range of applications
With its excellent performance, CXSU63312 has become the ideal power management choice for the following applications:
· OLED and LCD display bias: Provide stable high-voltage bias power supply for the display of smart phones and wearable devices.
· White LED driver: Efficient driving of multiple series LEDs for backlighting or illumination.
· Portable equipmentSuch as PDAs, digital cameras, handheld scanners, etc., which require subsystems that generate higher voltages from lithium batteries.
· Other low-power high-voltage demand scenarios: Such as sensor bias, analog circuit power supply, etc.
4. Key Design Guide
To ensure optimum performance of the CXSU63312, JTM-IC engineers recommend that the following design points be focused:
4.1. Inductance selection: It is recommended to use inductors in the range of 4.7μH to 22μH, focusing on its core loss and DC resistance at 1.2MHz to ensure high efficiency and avoid saturation.
4.2. Capacitor and diode selection: Input and output are recommended.Above 1μFLow ESR ceramic capacitors (such as X5R/X7R materials). Output rectifier diode shall be selectedSchottky diodeIn order to improve the overall efficiency by taking advantage of its low forward voltage drop and fast recovery characteristics, its reverse withstand voltage needs to be higher than the maximum output voltage.
5.3. PCB Layout Recommendations：
· The input/output capacitors should be as close as possible to the VIN and GND pins of the IC, and well grounded to reduce noise.
· The switch node (SW) traces should be short and thick, and the wiring area of the high-frequency swing node should be minimized to reduce EMI.
· The feedback resistor divider network should be placed close to the FB pin and away from noise sources such as inductors and SW nodes.
· Establish a complete, solid ground plane that provides a good thermal and noise isolation path for the IC.
5. packaging and supply information
CXSU63312 industry-standardSOT23-5Packaging, easy to automate placement, very suitable for mass production. As a reliable integrated circuit supplier, JTM-IC can provide samples, technical support and volume supply services for the device. Detailed electrical characteristics, typical performance curves, absolute maximum ratings and package size diagrams are available on our official websitejtm-ic.comGet.
6. typical schematics and graphs
7.Related Productsmore...
8. epilogue
In the pursuit of thin equipment, long standby today, CXSU63312 with its high efficiency, small size, high integration and excellent reliability, provides engineers with a very competitive power boost solution. Whether you are designing a new generation of portable consumer electronics, industrial handheld devices or medical instruments, CXSU63312 can help you meet the challenges of power supply design with ease.
Visit JTM-IC official website now（jtm-ic.com）Learn more about CXSU63312 technical documentation, application notes and procurement information so we can help you set sail for your next innovation!
