Kingbor Technology Co.,Ltd KB3429 TEL˖ (86)0755-83095458 FAX˖ (86)0755-88364052 Synchronous Boost DC/DC Regulator kB3429 Description Features z z Up to 96% Efficiency Low voltage start-up˖0.9V z z Shut-down current: < 1µA Input voltage˖0.5V̚4.4V optimized to provide a high efficient solution z Output voltage˖2.5V̚4.3V (Up to 5V work under the input voltage between 0.6V with Schottky) and 4.4V with a 1.5MHz fixed frequency Low switch on resistance RDS(ON), Internal switch: 0.35¡ switching. These features minimizes overall z 0.5MHz fixed frequency switching low z High switch on current: 1A capacitors. z Short-Circuit protection z Low Profile (1mm) SOT-23 Package z The kB3429 is high efficiency synchronous, step-up DC/DC converters to medium power systems. The devices solution footprint by allowing the use of tiny, profile inductors and ceramic 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. Applications The devices also featured providing up to z Digital cameras and MP3 260mA from a single AA cell input or up to z Palmtop computers / PDAs 600mA from a 2-cell AA with a 3V/3.3V z Cellular phones output. z Wireless handsets and DSL modems z PC cards z Portable media players The kB3429 regulators are available in the industry standard SOT-23-6 packages (or upon request). kB3429 Ver: 1.1 - 1 - power Kingbor Technology Co.,Ltd KB3429 TEL˖ (86)0755-83095458 FAX˖ (86)0755-88364052 Typical Application kB3429 Pin Assignment VIN VOUT EN 6 5 4 PIN NUMBER PIN NAME FUNCTION 1 SW Switch Output 2 GND Ground 3 FB Feedback 4 EN SOT-23-6 ON/OFF Control (High Enable) 1 SW 2 3 GND FB Order Information kB3429 - ķ ĸ : SYMBOL ķ ĸ Ver: 1.1 DESCRIPTION Denotes Output voltage: A : Adjustable Output Denotes Package Types: F: SOT-23-6 - 2 - 5 VOUT Output 6 VIN Input Kingbor Technology Co.,Ltd TEL˖ (86)0755-83095458 FAX˖ (86)0755-88364052 KB3429 Functional Diagram kB3429 Absolute Maximum Ratings z z z z z z z z Power Dissipation………………………………………...Internally limited VIN ……………………………………………………………..- 0.3 V ̚ + 6 V VOUT…………………………………………………………....- 0.3 V ̚ + 6 V VSW …….………………………………………………………- 0.3 V ̚ + 6 V VEN, VOUT………………………………………………………- 0.3 V ̚ + 6 V Operating Temperature Range …………………………- 30ć ̚ + 85ć Lead Temperature (Soldering 10 sec.) ……………………………+ 300ć Storage Temperature Range …………………………..- 65ć ̚ + 125ć Ver: 1.1 - 3 - Kingbor Technology Co.,Ltd KB3429 TEL˖ (86)0755-83095458 FAX˖ (86)0755-88364052 Electrical Characteristics Operating Conditions: TA=25ć, VIN=1.2V, VOUT=3.3V unless otherwise specified. PARAMETER CONDITIONS Output Voltage Range (Adj.) MIN TYP 2.5 MAX UNITS 5 V Minimum Start-Up Voltage ILOAD = 1mA 0.9 1.1 V Minimum Operating Voltage EN = VIN 0.5 0.65 V 1.1 1.5 1.7 MHz 80 87 % 40 ns Switching Frequency Max Duty Cycle VFB = 1.15V Current Limit Delay to Output Feedback Voltage 1.165 1.23 1.241 1 V Feedback Input Current VFB = 1.22V NMOS Switch Leakage VSW = 5V 0.1 5 µA PMOS Switch Leakage VSW = 0V 0.1 5 µA NMOS Switch On Resistance VOUT = 3.3V 0.35 ȍ PMOS Switch On Resistance VOUT = 3.3V 0.45 ȍ 950 mA NMOS Current Limit 700 nA Quiescent Current (Active) Measured On VOUT, Nonswitching 300 500 µA Shutdown Current VEN=0V, Including Switch Leakage 0.1 1 µA En Input High 1 V En Input Low En Input Current Ver: 1.1 VEN = 5.5V 0.01 - 4 - 0.35 V 1 µA Kingbor Technology Co.,Ltd TEL˖ (86)0755-83095458 FAX˖ (86)0755-88364052 KB3429 Packaging Information SOT-23-6 Package Outline Dimension Symbol A A1 A2 b c D E E1 e e1 L ș Ver: 1.1 Dimensions In Millimeters Min Max 1.050 1.250 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°