LP6203-QVF

Preliminary Datasheet LP6203 High Efficiency Boost DC/DC Regulator General Description The LP6203 is a compact, high efficiency, and low voltage step-up DC/DC converter including an error amplifier, ramp generator, comparator, switch pass element and driver in which providing a stable and high efficient operation over a wide range of load currents. It operates in stable waveforms without external compensation. The low start-up input voltage below 1.6V makes LP6203 suitable for 2 to 4 battery cells applications of providing up to 1A output current. The high switching rate minimized the size of external components. Besides, the 19µA low quiescent current together with high efficiency maintains long battery lifetime. The output voltage is set with two external resistors. Features 1.6V Start-up Input Voltage Output up to 20V High Supply Capability to Deliver 6V 500mA with 2 Alkaline Cell 19µA Quiescent (Switch-off) Supply Current Zero Shutdown Mode Supply Current 90% Efficiency Up to 450KHz Switching Frequency Using Internal Power Switches Small DFN2*2-6 Package  Typical Application Circuit Vin 10uH + 10uF 1K 4 1uF 3 VDD 6 Cout 47uF SOE 1 22pF 0.01 5 R2 500K R1 1.5M SS24 + Vout Ordering Information LP6203 □□ □ LP6203QVF GND 2 SW N/A FB 22pF F: Pb-Free Package Type QV: TDFN-6 Pin Configurations Applications AlK. Battery products Marking Information Please see website. TDFN-6(Top View) LP6203 –01 Ver. 1.1 Datasheet FEB.-2009 Page 1 of 8 Preliminary Datasheet Functional Pin Description Pin Number 1 2 3 4 5 6 PAD1 PAD2 Pin Name SOE GND N/A VDD FB SW Function Source of the mosfet. Ground No Connector Output Feedback Switch output Connected to PIN 6 internally Need to connect to GND LP6203 Function Block Diagram LP6203 Absolute Maximum Ratings Supply Input Voltage------------------------------------------------------------------------------------------------------6V SW Pin Switch Voltage--------------------------------------------------------------------------------−0.3V to (Vout + 0.8V) Other I/O Pin Voltages---------------------------------------------------------------------------------- −0.3V to (Vout + 0.3V) SW Pin Switch Current ---------------------------------------------------------------------------------------------------2.5A SW Pin Voltage(max) ------------------------------------------------------------------------------------- 23V Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------------------260°C Storage Temperature Range --------------------------------------------------------------------------------- −65°C to 150°C ESD Susceptibility HBM (Human Body Mode) ----------------------------------------------------------------------------------------------------2kV MM(Machine-Mode)-----------------------------------------------------------------------------------------------------------200V Recommended Operating Conditions Supply Input Voltage-------------------------------------------------------------------------------------------------1.6V to 6.5V Operation Ambient Temperature Range------------------------------------------------------------------ −40°C to 85°C LP6203 –01 Ver. 1.1 Datasheet FEB.-2009 Page 2 of 8 Preliminary Datasheet Electrical Characteristics (VIN = 1.5V, VDD set to 3.3V, Load Current = 0, TA = 25°C, unless otherwise specified) Parameter Start-UP Voltage Operating VDD Range No Load Current I (VIN) Feedback Reference Voltage Switching Frequency Maximum Duty SW ON Resistance Current Limit Setting Line Regulation Load Regulation Temperature Stability for VOUT Thermal Shutdown Thermal Shutdown Hysterises VDD = 3.3V VDD = 3.3V VDD = 3.3V VDD = 3.3V VIN = 1.5 ~ 2.5V, IL = 1mA VIN = 2.5V, IL = 1 ~ 100mA 80 0.3 2.5 10 0.25 50 165 10 Test Conditions IL = 1mA VDD pin voltage VIN = 2V, VOUT = 6V Close Loop, VDD = 3.3V 1.187 2 19 1.212 1.237 Min Typ 1.50 Max 1.55 6.5 Units V V µA V KHz % Ω A mV/V LP6203 mV/mA ppm/℃ ℃ ℃ LP6203 –01 Ver. 1.1 Datasheet FEB.-2009 Page 3 of 8 Preliminary Datasheet Typical Operating Characteristics TA=25℃, CIN =10 µF, COUT =20 µF, L=4.7 µH, unless otherwise noted. Refer to Test Circuit Figure. 1 VOUT=3.3V (RM=0.33/5 Ω) Efficiency VS Output Current 80 75 Efficiency (%) 70 65 60 55 50 10 100 Output Current (mA) Output Voltage VS Output Current 1.6 1.4 1.2 Vin (V) 1 0.8 0.6 0.4 0.2 0 0 200 400 Output Current (mA) 450 400 350 300 250 200 150 100 1 1.5 2 2.5 Supply Voltage (V) LP6203 –01 Ver. 1.1 Datasheet FEB.-2009 LP6203 Efficiency VS Output Current 85 80 Efficiency (%) 75 70 65 60 55 50 10 100 Output Current (mA) Start up Voltage and Hold on Voltage VS Output Current 1000 VIN=1.8V VIN=2.4V VIN=1.1V VIN=1.5V 1000 3.5 Output Voltage (V) 3 2.5 2 1.5 1 0.5 0 VIN=1.1V VIN=1.5V VIN=1.8V 600 800 Start up Hold on 0 10 20 30 40 50 Output Current (mA) Oscillator Frequency VS Supply Voltage (Io=200mA) Oscillator Frequency (KHz) Page 4 of 8 Preliminary Datasheet Typical Performance Characteristics TA=25℃, CIN =10 µF, COUT =20 µF, L=4.7 µH, unless otherwise noted. VOUT=5V (RM=0.33/5Ω) 90 80 Efficiency (%) 70 60 50 40 30 10 100 Output Current (mA) VIN=1.2V VIN=1.8V VIN=2.4V 1000 Efficiency (%) Efficiency VS Output Current 90 85 80 75 70 65 60 10 100 Output Current (mA) LP6203 Efficiency VS Output Current VIN=3.3V VIN=4.2V 1000 5 4.9 4.8 4.7 4.6 4.5 4.4 4.3 4.2 4.1 0 Output Voltage VS Output Current VIN=1.1V VIN=1.5V Vin (V) VIN=1.8V 1.4 1.2 1 0.8 0.6 0.4 0.2 0 Start up Voltage and Hold on Voltage VS Output Current Output Voltage (V) Start up Hold on 0 10 20 30 40 50 200 400 Output Current (mA) 600 800 Output Current (mA) Oscillator Frequency (KHz) 450 400 350 300 250 200 150 Oscillator Frequency VS Supply Voltage (Io=200mA) 1.5 2 2.5 3 3.5 4 Supply Voltage (V) LP6203 –01 Ver. 1.1 Datasheet FEB.-2009 Page 5 of 8 Preliminary Datasheet LX Pin Wave Form & Output Ripple LX Wave Form LX Wave Form VIN=1.5 VOUT=3.3V @ 200mA LP6203 LX Pin Wave Form & Output Ripple VIN=1.8 VOUT=3.3V @ 200mA Output Ripple Time (1µS/Div) LX Pin Wave Form & Output Ripple LX Wave Form LX Wave Form VIN=2.4 VOUT=3.3V @ 200mA Output Ripple Time (1µS/Div) LX Pin Wave Form & Output Ripple VIN=2.4V VOUT=5V @ 200mA Output Ripple Time (1µS/Div) LX Pin Wave Form & Output Ripple LX Wave Form LX Wave Form VIN=3.3V VOUT=5V @ 200mA Output Ripple Time (1µS/Div) LX Pin Wave Form & Output Ripple VIN=4V VOUT=5V @ 200mA Output Ripple Time (1µS/Div) LP6203 –01 Ver. 1.1 Datasheet FEB.-2009 Output Ripple Time (1µS/Div) Page 6 of 8 Preliminary Datasheet Typical Performance Characteristics TA=25℃, CIN =10 µF, COUT =20 µF, L=4.7 µH, unless otherwise noted. Refer to Test Circuit Figure. 2 VOUT=5V (RM=0.33/5Ω) LP6203 80 75 Efficiency (%) 70 65 60 55 50 45 40 10 Efficiency VS Output Current (VOUT=5V) 100 90 Efficiency (%) 80 70 60 50 40 10 Efficiency VS Output Current (VOUT=5V) VIN=1.8V VIN=2.4V 100 Output Current (mA) 1000 VIN=3.3V VIN=4.2V 100 Output Current (mA) 1000 5 VOUT (V) 4 3 2 1 0 0 200 400 600 Output Current (mA) VIN=1.8V VIN=2.4V 800 1000 Oscillator Frequency (KHz) 6 Output Voltage VS Output Current Oscillator Frequency VS Supply Voltage (Io=300mA) 450 400 350 300 250 200 2 2.5 3 Supply Voltage (V) 3.5 4 LP6203 –01 Ver. 1.1 Datasheet FEB.-2009 Page 7 of 8 Preliminary Datasheet Packaging Information LP6203 Symbol A A1 A3 D E D1 E1 k b e L Dimensions In Millimeters Min Max 0.700/0.800 0.000 0.203REF 1.924 1.924 0.520 0.900 0.200MIN 0.250 0.650TYP 0.174 0.326 0.350 2.076 2.076 0.720 1.100 0.800/0.900 0.050 Dimensions In Inches Min Max 0.028/0.031 0.000 0.008REF 0.076 0.076 0.020 0.035 0.008MIN 0.010 0.026TYP 0.007 0.013 0.014 0.082 0.082 0.028 0.043 0.031/0.035 0.002 LP6203 –01 Ver. 1.1 Datasheet FEB.-2009 Page 8 of 8