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| Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3429 Synchronous Boost DC/DC Regulator kB3429 Features Up to 96% Efficiency Low voltage start-up 0.82V Shut-down current: < 1A Input voltage 0.5V 4.4V Output voltage 2.5V with Schottky) Low switch on resistance RDS(ON), Internal switch: 0.35 0.5MHz fixed frequency switching High switch on current: 1A Short-Circuit protection Low Profile (1mm) SOT-23 Package The kB3429 is capable of supplying an output voltage between 2.5V and 4.3V, the internal synchronous switch is desired to provide high efficiency without Schottky. The devices also featured providing up to Digital cameras and MP3 Palmtop computers / PDAs Cellular phones Wireless handsets and DSL modems PC cards Portable media players the The kB3429 regulators are available in industry standard SOT-23-6 power packages (or upon request). 260mA from a single AA cell input or up to 600mA from a 2-cell AA with a 3V/3.3V output. 4.3V (Up to 5V Description The kB3429 is high efficiency synchronous, step-up DC/DC converters optimized to provide a high efficient solution to medium power systems. The devices work under the input voltage between 0.6V and 4.4V with a 1.5MHz fixed frequency switching. These features minimizes overall solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. Applications kB3429 Ver: 1.3 -1- Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3429 Typical Application 0.82V-4.4V kB3429 Pin Assignment PIN NUMBER VIN VOUT EN PIN NAME SOT-23-6 1 2 SW GND FB EN (High Enable) 5 VOUT VIN Output Input Switch Output Ground Feedback ON/OFF Control 4 FUNCTION 6 5 4 Top Marking 1 SW 3 2 GND 3 FB 6 Top Marking: HX-Xh: To manufacture marking after 2007-3-15 XF: Before 2007-3-15 Order Information kB3429 - : SYMBOL DESCRIPTION Denotes Output voltage: A : Adjustable Output Denotes Package Types: F: SOT-23-6 Ver: 1.3 -2- Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3429 Functional Diagram 0.82V-4.4V kB3429 Absolute Maximum Ratings Power Dissipation................................................Internally limited VIN .......................................................................- 0.3 V +6V VOUT......................................................................- 0.3 V +6V VSW ......................................................................- 0.3 V +6V VEN, VOUT...............................................................- 0.3 V +6V Operating Temperature Range ..............................- 30 + 85 Lead Temperature (Soldering 10 sec.) .................................+ 300 Storage Temperature Range ................................- 65 + 125 Ver: 1.3 -3- Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3429 Electrical Characteristics Operating Conditions: TA=25 , VIN=1.2V, VOUT=3.3V unless otherwise specified. PARAMETER Output Voltage Range (Adj.) Minimum Start-Up Voltage Minimum Operating Voltage Switching Frequency Max Duty Cycle Current Limit Delay to Output Feedback Voltage Feedback Input Current NMOS Switch Leakage PMOS Switch Leakage NMOS Switch On Resistance PMOS Switch On Resistance NMOS Current Limit Quiescent Current (Active) Shutdown Current En Input High En Input Low En Input Current VEN = 5.5V 0.01 Measured On VOUT, Nonswitching VEN=0V, Including Switch Leakage 1 0.35 1 VFB = 1.22V VSW = 5V VSW = 0V VOUT = 3.3V VOUT = 3.3V 700 1.165 VFB = 1.15V ILOAD = 1mA EN = VIN 1.1 80 CONDITIONS MIN 2.5 TYP MAX 5 UNITS V V V MHz % ns 0.82 0.5 1.5 87 40 1.23 1 0.1 0.1 0.35 0.45 950 300 0.1 0.85 0.65 1.7 1.241 V nA 5 5 A A mA 500 1 A A V V A Ver: 1.3 -4- Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3429 Packaging Information SOT-23-6 Package Outline Dimension Symbol A A1 A2 b c D E E1 e e1 L Dimensions In Millimeters Min Max 1.050 1.450 0.000 0.100 1.050 1.150 0.300 0.500 0.100 0.200 2.820 3.020 1.500 1.700 2.650 2.950 0.950(BSC ) 1.800 2.000 0.300 0.600 0 8 -5- Dimensions In Inches Min Max 0.041 0.049 0.000 0.004 0.041 0.045 0.012 0.020 0.004 0.008 0.111 0.119 0.059 0.067 0.104 0.116 0.037(BSC) 0.071 0.079 0.012 0.024 0 8 Ver: 1.3 |
Price & Availability of KB3429-AF
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