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| Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB2301 Features 400KHz Maximum Operation Frequency 2.0V to 5.0V Output Voltage With 0.1V Step Low Start-up Voltage: 0.8V at 1mA 2% Output Voltage Accuracy Up to 88% Efficiency Output current: 300mA at 2.5V input, 3.3V output Low Ripple and Low Noise Output Current Extendable by External Switch Step-Up DC-DC Converter General Description The KB2301 Series are PFM step-up DC-DC converters with very low ripple noise due to the high operation frequency. The maximum operation frequency is 400KHz. Only three components are required to realize the conversion from the battery voltage to a selected output voltage. A driver pin (EXT) is provided for driving external power transistor to extend the output current capability where large current is required. Enable pin (EN) is also provided so that the circuit can be powered down. Applications Power source for applications where a higher voltage than the battery voltage is required One to three cell battery devices Power source for cameras, camcorders, VCRs, PDAs, pagers and hand held communication instrument Ordering Information KB Package Type: T: SOT-23-3 F: SOT-23-5 E: SOT-89 Output Voltage: 20: 2.0V 21: 2.1V 49: 4.9V 50: 5.0V External switch E: use external switch L: use internal switch Typical Applications 1 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB2301 Block Diagram FB(5V only) 2.15V Pin Assignment Pin Name KB2301 LXXT SOT-23-3 Part Marking and Package Type KB2301 LXXF SOT-23-5 KB2301 LXXE SOT-89 KB2301 EXXT SOT-23-3 KB2301 EXXF SOT-23-5 KB2301 EXXE SOT-89 Description LX EXT VOUT EN GND FB 2 3 1 - 5 2 1 4 3 3 2 1 - 2 3 1 - 5 2 1 4 3 3 2 1 - Switching pin Buffer output for external transistor Output voltage Chip enable (active high) Ground 5V only KB2301LXXT KB2301LXXF KB2301LXXE FB(5V only) KB2301EXXT KB2301EXXF KB2301EXXE FB(5V only) 2 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB2301 Value 8 -0.3-VOUT+0.3 1000 100 0.25 0.25 0.5 -20-85 -40-165 2000 Unit V V mA mA W W W o Absolute Maximum Ratings Type Voltage Symbol Vmax Vmin-max Current ILXmax IEXTmax Power dissipation Psot-23-3 Psot-23-5 Psot-89 Thermal Tmin-max Tstorage ESD VESD Description Maximum voltage on VOUT and VLX pins Voltage range on EXT and EN pins Maximum current on LX pin Maximum current on EXT pin Maximum Power dissipation for SOT-23-3 package Maximum Power dissipation for SOT-23-5 package Maximum Power dissipation for SOT-89 package Operation temperature range Storage temperature range ESD voltage for human body mode C C o V Electronic Characteristics Parameter Output voltage accuracy Maximum input voltage Start-up voltage Hold-on voltage Maximum oscillation frequency Oscillator duty cycle Efficiency Current limit Input current at no load VIN=1.8V VOUT=3.0V VIN=1.8V VOUT=5.0V VOUT pin current at switch off Drive VOUT pin with voltage VOUT+0.5V No load, EN="low" 6 8 600 Symbol VOUT VINMAX VSTART VHOLD FMAX DCOSC ILOAD=1mA, VIN:0 ILOAD=1mA, VIN:2 2V 0V 0.6 350 75 400 80 85 800 20 450 85 88 1000 Test Condition Min -2 0.7 Typ Max 2 VOUT 0.85 Unit % V V V KHz % % mA uA uA uA Input standby current 1 uA 3 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB2301 0.4 VOUT 0.2 0.1 -0.1 -5 5 V V uA uA mA EN "High" voltage level EN "low" level EN "high" input current EN "low" input current EXT output current 4 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB2301 Typical Characteristics (Using Internal Switch Transistor) Start-up/Hold-on vs. Output Current L=47uH C=47uF Output Current(mA) Output Voltage vs. Output Current L=47uH C=47uF VOUT=3.4V Output Current (mA) 5 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB2301 Efficiency vs. Output Current L=47uH C=47uF VOUT=3.4V Output Current(mA) Output Current vs. Ripple Voltage L=47uH C=47uF VOUT=3.4V Output Current (mA) 6 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB2301 Output Current vs. Ripple Voltage L=47uH C=2*47uF VOUT=3.4V Output Current (mA) Output Current vs. Ripple Voltage L=47uH C=3*47uF VOUT=3.4V Output Current (mA) 7 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB2301 Package Information 8 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB2301 9 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB2301 10 |
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