LC3500 0.9V startup, 1MHz, 300mA Iout, Low Iq, Synchronous Boost converter DESCRIPTION FEATURES The LC3500 is a step-up converter that provides a Efficiency up to 95% Vin=2.7V, Vout=3.3V boosted output voltage from a low voltage Typical 15uA standby current source. Because of its proprietary design, it starts 1MHz Switching Frequency allows small up at a very low input voltage down to 0.9V, and inductor and output cap only consumes 15uA at standby, making it an Input boost-strapping allows using small or ideal choice for single cell alkaline/NiMH battery no input cap operations. Low Vin Start-up Voltage down to 0.9V Ideal for Single Alkaline Cell operations A switching frequency of 1MHz minimizes Maximum Output Current up to 300mA solution footprint by allowing the use of tiny, low Low Noise PWM control profile inductors and ceramic capacitors. The Internally Compensated Current Mode Control current mode PWM design is internally Internal Synchronous Rectifier compensated, reducing external parts count. Available in SOT23-3SOT23-5 and SOT89-3 LC3500 is available in SOT23-3 SOT23-5 and SOT89-3 Packages. APPLICATIONS One to Three Cell Battery Operated Devices Medical Instruments Bluetooth Headsets Flash-Based MP3 Players Noise Canceling Headphones TYPICAL APPLICATION PIN OUT & MARKING OUT OUT SW 5 4 3 2.2uH SXX SXYW SXYW LLHYW SW 1 2 3 1 2 3 VIN 1 2 VOUT GND SW NC GND NC GND OUT SW OUT SOT23-3 SOT23-5 SOT89-3 LC3500 10uF 10uF S: Product Code S: Product Code GND X: Output Voltage XX: Output Voltage YW: Date code LL: LOT No. H: FAB Code YW: Date code Output Voltage Code X VOUT Code VOUT Code 1.8V 8 3.0V 0 3 2.5V 3.3V 2.7V 3.6V 6 2.8V www.leadchip.com 1 Your final power solution LC3500 ORDERING INFORMATION PART No. PACKAGE Tape&Reel LC3500CB3TR SOT23-3 3000/Reel LC3500CB5TR SOT23-5 3000/Reel LC3500CC3TR SOT89-3 1000/Reel Note: stands for output voltage. ABSOLUTE MAXIMUM RATING Parameter Value SW Voltage -0.3 ~ 6V OUT Voltage -0.3 ~ 6V Max Operating Junction Temperature(Tj) 125C SOT23-3 450mW Maximum Power Dissipation SOT23-5 450mW SOT89-3 500mW Ambient Temperature(Ta) -40C 85 C Storage Temperature(Ts) -55 C - 150 C Lead Temperature & Time 260 C, 10S Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability. ELECTRICAL CHARACTERISTICS (T =25 C) A Symbol Parameter Conditions Min Typ Max Unit Vin Input Voltage Range 0.9 5 V Vstart Startup Voltage Iout = 1mA 0.9 V Vhold Hold Voltage Iout = 50mA 0.5 0.7 V Vout Output Voltage Range 1.8 3.6 V Output voltage accuracy Iout = 0mA 2 % Line regulation Iout = 50mA 0.1 0.2 %/V Load regulation Iout = 0~300mA 1 2 % Fsoc Switching Frequency Vout=0.95Vo, No inductor 0.7 1 1.4 MHz Max Duty cycle Vout=0.95Vo, No inductor 85 90 95 % Quiescent Current at Vout Vout=1.05*Vo 5 8 15 uA I Q Supply current at Vin Iout = 0mA 20 uA Efficiency Iout = 100mA 85 % Isw =100mA RdsonP PMOS Rdson 400 600 mohm Isw =100mA RdsonN NMOS Rdson 200 300 mohm Iswlk SW Leakage Current Vout=3.6V, Vsw=0 or 5.2V 1 uA PIN DESCRIPTION PIN NAME DESCRIPTION SOT23-3 SOT23-5 SOT89-3 1 2 1 GND Ground 2 4 3 SW To connect inductor to VIN Output voltage pin, with 10uF ceramic capacitor closely 3 5 2 OUT connected to GND - 1, 3 - NC No Connection www.leadchip.com 2 Your final power solution