The CXCL65189 has a wide input voltage range of 2.1V to 6V, with a built-in 70m Ω low on resistance switch that supports a maximum load current of 2.2A. Its biggest feature is that users can flexibly set the current limit threshold through external precision resistors, ranging from 75mA to 2.2A, with an accuracy of up to ± 5% (under 1.7A conditions). In addition, the device also has an input withstand voltage of 7.5V and an overvoltage protection (OVP) function of 6.1V, effectively preventing voltage spikes from causing damage to the system.
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[ CXCL65189 ]"
In modern electronic systems, the performance and reliability of power management chips directly affect the stable operation of the entire system. CXCL65189 is a high-performance load switch designed for systems and loads that require comprehensive protection against high current conditions. This device integrates multiple advanced protection functions and is suitable for various portable devices, digital TVs, set-top boxes, VOIP phones, as well as USB ports and hubs and other application scenarios.
Product Overview
The CXCL65189 has a wide input voltage range of 2.1V to 6V, with a built-in 70mΩ The low on resistance switch supports a maximum load current of 2.2A. Its biggest feature is that users can flexibly set the current limit threshold through external precision resistors, ranging from 75mA to 2.2A, with an accuracy of up to; 5% (under 1.7A conditions). In addition, the device also has an input withstand voltage of 7.5V and an overvoltage protection (OVP) function of 6.1V, effectively preventing voltage spikes from causing damage to the system.
Core Features and Protection Mechanisms
CXCL65189 not only provides basic switch functions, but also integrates multiple protection mechanisms to ensure the safety of the system and load in case of abnormal situations:
• Programmable current limitBy connecting an external resistor through the ILIM pin, users can accurately set the current limit point to prevent damage caused by overload or short circuit.
• Thermal shutdown protectionWhen continuous overcurrent causes the chip temperature to rise to 160 ° C; At C (typical value), the device automatically shuts down to avoid permanent damage caused by overheating.
• Reverse voltage blockingWhen the output voltage is higher than the input voltage, the reverse current is automatically blocked to protect the front-end circuit.
• Low voltage lockout (UVLO)Automatically turn off the switch when the input voltage is below 2.0V to ensure that the system operates within a safe voltage range.
• Fault indication (nFAULT)The nFAULT pin of the open drain output is pulled low in the event of overcurrent, reverse voltage, or overheating faults, facilitating real-time monitoring and response of the system.
Package options and pin specifications
CXCL65189 offers three compact packages: SOT23-5, SOT23-6, and DFN2x2-6L, to meet different space and heat dissipation requirements. Each package pin is optimized for layout and supports high-density PCB design. The DFN package is also equipped with heat dissipation pads (EP), which can effectively dissipate heat through the PCB and improve reliability in high-temperature environments.
Typical Application Circuit
In practical applications, it is recommended to connect at least 4.7 μ m between the IN pin and GND; Ceramic decoupling capacitors of F are used to suppress power supply noise; OUT pin recommended to use 10µ F capacitor to enhance load transient response. The EN pin is compatible with low-voltage logic signals and can be directly controlled by MCU or power management unit. The nFAULT pin needs to be externally connected with a pull-up resistor to IN in order to output a valid low-level signal in the event of a fault.
Detailed explanation of performance advantages
CXCL65189 performs excellently in response speed, power control, and temperature adaptability:
• Fast overcurrent responseShort circuit response time is only 1µ s， Can quickly limit current and prevent system collapse.
• Low static currentTypical value is 100µ A， Turn off current as low as 0.9 μ m; A， Very suitable for battery powered devices.
• Wide temperature operation: Supports -40° C to+85° The environmental temperature range of C has a small variation in on resistance with temperature and high stability.
Design considerations
To ensure system reliability, it is recommended to pay attention to the following points during the design process:
• PCB layoutTry to shorten the distance between input and output capacitors and device pins as much as possible to reduce parasitic inductance.
• Thermal managementIn high load applications, heat dissipation efficiency should be improved through large-area flooring and heat dissipation through holes.
• fault recoveryThe nFAULT signal has a debounce function to avoid false alarms due to instantaneous interference and improve system robustness.
Conclusion
CXCL65189, with its high integration, flexible current configuration, and comprehensive protection functions, has become an ideal load switch solution in modern electronic systems. We can provide stable and reliable power management support in the fields of consumer electronics, communication equipment, and industrial control.
To learn more about CXCL65189 and other high-performance power management chips, please visit the JTM-IC official website:www.jtm-ic.comWe are committed to providing customers with high-quality integrated circuit solutions and technical support.
