CXSU63313 is a high-performance boost voltage regulator chip controlled by pulse frequency modulation (PFM). It can start normally when the input voltage is as low as 0.8V, and is allowed to output a stable voltage of 2.5V to 5.0V in the input voltage range (step 0.1V, support customization). The chip is designed to optimize the switching noise, significantly reduce the interference to the peripheral circuit, combined with internal correction technology and temperature compensation design, to achieve a ± 2.5% output accuracy and less than ± 100ppm/℃ low temperature drift characteristics.
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[ CXSU63313 ]"
With the increasing popularity of portable electronic devices, how to effectively extend battery life and improve power efficiency has become the core challenge of product design. JTM-IC (jtm-ic.com) Grand LaunchCXSU63313Series-a PFM control switching DC/DC boost regulator chip optimized for 1~4 dry battery or nickel-hydrogen battery applications, with its0.8V ultra-low starting voltage,Static power consumption of only 5.5 μAand up85% conversion efficiencyIt is an ideal power solution for low-power portable devices.
1. CXSU63313 Product overview
CXSU63313 is a pulse frequency modulation (PFM) control of high performance boost voltage regulator chip, can be low input voltage0.8VWhen the normal start, and in the input voltage range of the content of the output.2.5V to 5.0VSteady voltage (step 0.1V, support customization). In the design of the chip, the switching noise is specially optimized, the interference to the peripheral circuit is significantly reduced, and the internal correction technology and temperature compensation design are combined to realizeOutput accuracy of ± 2.5%with less± 100ppm/℃Low temperature drift characteristics.
2. core advantages and characteristics
2.1. Ultra-low power consumption and high start-up capabilityStatic operating current<5.5μA, greatly reducing standby loss; 0.8V starting voltage ensures that the battery can still work reliably when it is almost exhausted, especially suitable for single or double battery power supply scenarios.
2.2. Strong load driving capacity: When the input voltage is 1.8V, it can provide 3.3V output voltage and drive200mA loadTo meet the power needs of most portable devices.
2.3. Flexible encapsulation and enable control.: provideSOT-89-3,SOT-23-3andSOT-23-5Three types of packaging. Wherein SOT-23-5 package is equippedCE enable pinIt can easily control the chip switch and further reduce the system power consumption.
2.4. High integration and simplified designInternal integrated reference voltage, oscillator, error amplifier, PFM controller and over-current protection circuit, peripheral only need inductor, capacitor and Schottky diode to build a complete boost circuit.
3. typical application areas
With its excellent low-voltage start-up and high-efficiency conversion characteristics, CXSU63313 are widely used in the following fields:
· Portable Consumer ElectronicsSuch as PDA, digital camera (DSC), MP3 player, wireless mouse, electric toys, etc.
· Battery Powered EquipmentPower boost module for single or dual AA/AAA battery devices.
· LED lighting driver: Provide stable and efficient boost drive for LED flashlights, headlights, etc. to improve brightness and endurance.
· Other Low Power Systems: Sensor modules, handheld meters, remote controls and other scenarios that require high voltage and low current power supply.
4. Design Guide and Peripheral Component Selection Recommendations
In order to ensure the best performance of the CXSU63313, JTM-IC combined with many years of application experience, provide the following design recommendations:
4.1. Inductance selection: The recommended inductance value range is10 μH to 100 μH, the typical value is27μH. The inductor series resistance should be as small as possible (recommended <0.5 Ω) to reduce conduction loss and improve efficiency. Under heavy load (>50mA), it is recommended to choose a larger inductance value and a lower DCR inductance.
4.2. Output capacitance: Recommended47 μF to 220 μFLow ESR tantalum capacitors or multiple ceramic capacitors in parallel to effectively suppress output ripple. Typical application recommendation100μF.
4.3. Schottky diode: must be selectedLow-Drop, Fast-Recovery Schottky Diode, such as 1N5817, 1N5819, etc., to reduce rectification loss and improve overall efficiency.
4.4. Input capacitance: If the power supply line is long, it is recommended to add it to the chip input≥ 10μFfilter capacitors to reduce input noise and improve stability.
4.5. Layout considerations：
The power circuit (inductor, diode, output capacitor) should be short and thick to reduce parasitic resistance and inductance.
The feedback node (Vout monitoring) should be far away from noise sources such as inductors and switching nodes.
Use a complete ground plane as much as possible and ensure that the GND pin of the chip is well grounded.
5. packaging and product selection
CXSU63313 offer a variety of package options for applications with different space and thermal requirements:
· SOT-89-3: Good heat dissipation performance, suitable for slightly higher power scenarios.
· SOT-23-3: Small size, suitable for highly compact design.
· SOT-23-5: Integrated CE enable control, support power shutdown, further energy saving.
The product model can be selected by the suffix output voltage and package form, such as CXSU63313E33CIndicates the output voltage 3.3V, SOT-23-3 or SOT-89-3 package, built-in MOS switch tube.
6. epilogue
CXSU63313 with itsVery low start-up voltage, ultra-low static power, high-precision output, and flexible packaging options, provides engineers with a boost solution that achieves the perfect balance between battery life and system efficiency. Whether it is the pursuit of longer playback time of portable audio, or the need for reliable lighting flashlights, or any single/dual battery-based smart devices, CXSU63313 can help you easily achieve efficient and stable power design.
Visit JTM-IC official website now（jtm-ic.com）, get the CXSU63313 detailed data sheet, application circuit diagram, sample request and procurement information. Let's join hands to inject lasting energy into your next portable device!
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