LGS6302 (DC-DC Boost)

The LGS6302 is an asynchronous boost converter with integrated power switching and a wide input voltage range of 3V to 60V. It integrates soft-start, minimizing the need for external surge suppression components, making it ideal for wide input power range boost converters. The output voltage can be configured using external resistors of varying values.
 
The LGS6302 output current can be adjusted using an external resistor divider. Recommended output resistor values ​​are shown in the table below. The divider network consists of RG and RF; ensure RG is less than or equal to 30K. The converter regulates the output voltage by maintaining the voltage on the FB pin equal to the internal reference voltage VREF. Once RG is selected, the value of RF can be selected based on VFB, which is typically 1.2V. JLCPCB's reference price : The LGS6302 is available in two different packages; the ESOP8 package offers better heat dissipation, while the SOT23-5 package is more affordable. Schematic Diagram: Testing Section: I then tested some functions and parameters of the LGS6302: Test Conditions: VIN: 5V VOUT: 12V; Io: 500mA Test Conditions: VIN: 12V VOUT: 24V; Io: 500mA Test Environment: Temperature 24℃, Relative Humidity 57% Test Tools: GW Instek 4-channel adjustable DC power supply, Keysight digital multimeter, ITECH IT8811 electronic load, Xinsite thermal imager, Keysight oscilloscope; Sample: You can contact the original manufacturer to apply for a sample. Actual Test Data: Output Voltage: 12V Output Voltage: 24V Maximum Output Current Input Voltage Efficiency Maximum Output Current Input Voltage Efficiency 250mA 3.2V 69.85% 60mA 3.3V 78.56% 330mA 3.7V 74.25% 220mA 5.0V 82.29% 400mA 4.2V 79.14% 420mA 8.4V 87.36% 530mA 5V 81.61% 720mA 12V 90.55% 1000mA 8V 88.39% 1230mA 18V 93.80% Some measured waveforms: In CCM mode, input: 12V, output: 24V, output current: 500mA (ripple test) In CCM mode, input: 5V, output: 12V, output current: 500mA (power-on waveform) Efficiency graph of VIN:5V, VOUT:12V Efficiency graph of VIN:12V, VOUT:24V Overall conclusion: The chip's overall performance is good, and there are no problems with normal use.