BL8041 High Efficiency 1.2MHz 30V Boost DESCRIPTION FEATURES BL8041 is a step-up converter. Its 1.23V feedback voltage reduces power loss and improves efficiency. Optimized operation frequency can meet the requirement of small LC filters value and low operation current with high efficiency. Internal soft start function can reduce the inrush current. Tiny package type provides the best solution for PCB space saving and total BOM cost. 2.5V to 5.5V Input Voltage 1.23V Feedback Voltage 1.2MHz Fixed Switching Frequency Internal 0.6A Switch Current Limit Internal Compensation Thermal Shutdown Available in SOT23-5 Package APPLICATIONS BL8041 is available in SOT23-5 package that is PB free. Camera Flash White LED PDA LED back light Digital still cameras TYPICAL APPLICATION Figure1. BL8041 Typical Application Circuit ORDERING INFORMATION MARKING INFORMATION BL8041 □ 1□ 2□ 3 Code 1 Temperature & Rohs: 2 Package Type: 3 Product Classification Description Marking C: -40~85°C, Pb Free Rohs Std. 5 PY: Product Code YW: Date Code Packing Type: TR: Tape & Reel (Standard) 1 4 PYYW PYYW B5: SOT-23-5 www.belling.com.cn BL8041CB5TR 1 2 3 BL8041 PIN DESCRIPTION Pin No. Symbol 1 LX 2 3 GND FB 4 EN 5 IN Description Power Switch Output. LX is the drain of the internal MOSFET switch. Connect the power inductor and output rectifier to LX. LX can swing between GND and 30V. Ground Feedback Input. The FB voltage is 0.25V. Connect a resistor divider to FB. Regulator On/Off Control Input. A high input at EN turns on the converter, and a low input turns it off. When not used, connect EN to the input supply for automatic startup. Power Supply. Must be locally bypassed. ABSOLUTE MAXIMUM RATING Parameter IN, EN Pin Voltage SW Pin Voltage All Other Pin Voltage Junction Temperature (TJ) Ambient Temperature (TA) Power Dissipation Thermal Resistance (θJA) Thermal Resistance (θJC) Storage Temperature (Ts) Lead Temperature & Time Value -0.3V to 6V -0.3V to 30V -0.3V to 6V 150C -40C to 85C 600mW 250C/W 130C/W -65C to 150C 260C, 10Sec SOT23-5 RECOMMENDED WORK CONDITIONS Parameter Value Input Voltage Range Output Voltage Range Operating Junction Temperature(Tj) 2.5V to 5.5V VIN to 30V -40C –125C ELECTRICAL CHARACTERISTICS (Ta=25C, unless otherwise noted) Symbol Item VIN Operating Input Voltage VFB IFB Feedback Voltage FB input Bias Current SW Leakage IQ Quiescent Current FSW DMAX VEN Oscillator Frequency Maximum Duty Cycle EN Threshold SW On-Resistance Current Limit Thermal Shutdown ILIMIT www.belling.com.cn Conditions Min. Typ. 2.5 VFB=1V VSW=20V VFB=1V, Switch VEN=0V VIN=4V, Duty Cycle = 50% 2 1.21 -50 1.23 -10 0.15 0.1 1.2 90 1 400 0.6 160 Max. Unit 5.5 V 1.25 V nA uA mA uA MHz % V mΩ A C 1 0.3 1 650 BL8041 TYPICAL PERFORMANCE CHARACTERISTICS Efficiency Vout=12V 100% 100% 90% 90% 80% 80% 70% 70% 60% 60% Efficiency(%) Efficiency(%) Efficiency Vout=5V 50% 40% 30% 50% 40% 30% Vin=3.6V Vin=3.0V Vin=2.5V 20% 10% 0% 0.001 0.01 Iout (A) 0.1 20% Vin=5.0V 10% Vin=4.2V 0% 0.001 1 0.01 Iout (A) 0.1 1 Output Voltage vs. Output Current Efficiency Vout=18V 100% 6 90% 5 80% 4 60% Vout (V) Efficiency(%) 70% 50% 40% 3 2 30% 20% Vin=3.6V Vin=3.0V Vin=2.5V 1 10% Vin=5.0V 0% 0.001 0.01 Iout (A) 0.1 0 0.0 1 Output Voltage vs. Output Current 0.1 0.2 0.3 Iout (A) 0.4 0.5 0.6 Output Voltage vs. Output Current 14 20 18 12 16 14 8 Vout (V) Vout (V) 10 6 12 10 8 6 4 4 2 Vin=5.0V Vin=4.2V 0 0.0 0.1 www.belling.com.cn 0.2 Iout (A) 0.3 2 Vin=5.0V 0 0.4 0.0 3 0.1 0.2 Iout (A) 0.3 0.4 BL8041 Switching Waveform Switching Waveform Vin=5V, Vout=12V, Iout=200mA (CH1=Vin, CH2=Vout, CH3=LX, CH4=ILX) Vin=5V, Vout=18V, Iout=150mA (CH1=Vin, CH2=Vout, CH3=LX, CH4=ILX) Switching waveform Load Transient Response Vin=5V, Vout=18V, Iout=10mA-150mA (CH2=Vout, CH4=ILX) Vin=5V, Vout=12V, Iout=10mA-200mA (CH2=Vout, CH4=ILX) PACKAGE INFORMATION Package SOT-23-5 Devices per reel Package Dimension: www.belling.com.cn 4 3000Pcs Unit mm