Preliminary Datasheet LP6212 High Efficiency 6A Boost DC/DC Convertor General Description Features The LP6212 is a current mode boost DC-DC converter. Its PWM circuitry with built-in 6A Current power MOSFET makes this converter highly efficient. Selectable high switching frequency allows faster loop response and easy filtering with a low noise output. The non-inverting input its error amplifier is connected to an internal 0.6V precision reference voltage. Soft-Start time can be programmed with an external capacitor, which sets the input current ramp rate. Current mode control and external compensation network make it easy and flexible to stabilize the system. Up to 94% efficiency Output to Input Disconnect at Shutdown Mode Shut-down current:<1uA Output voltage Up to 5V/2.1A Internal Compensation 1.2MHz fixed frequency switching High switch on current:6A Available in ESOP8 Package Applications Battery products Host Products Panel Ordering Information LP6212 □ □ Pin Configurations TOP VIEW □ F: Pb-Free Package Type SP: ESOP8 Typical Application Circuit Marking Information Device Marking Package Shipping LP6212 LPS ESOP8 3K/REEL LP6212 XXXX LP6212 –00 Version1.0 Datasheet May.-2014 www.Lowpowersemi.com - - Page 1 of 6 Preliminary Datasheet LP6212 Functional Pin Description PIN PIN Name Description 1 GND 2 FB Feedback pin, the pin is 0.6V. 3 SW Switching Pin. 4 SW Switching Pin. 5 GND Ground Pin. 6 GND Ground Pin. 7 VIN Voltage Input Pin. 8 EN Chip Enable Pin. 9 PGND Ground Pin. Power Ground. Function Block Diagram LX VIN + + - FB + - EN GND LP6212 –00 Version1.0 Datasheet May.-2014 www.Lowpowersemi.com - - Page 2 of 6 Preliminary Datasheet LP6212 Absolute Maximum Ratings Supply Input Voltage---------------------------------------------------------------------------------------------------------------6V Power Dissipation, PD @ TA = 25°C ESOP8----------------------------------------------------------------------------------------------------------------------------2.6W Package Thermal Resistance ESOP8, θJA -----------------------------------------------------------------------------------------------------------------45°C/W Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------------260°C Recommended Operating Conditions Supply Input Voltage-----------------------------------------------------------------------------------------------------2.2V to 6V EN Input Voltage ---------------------------------------------------------------------------------------------------------0V to 5.5V Operation Junction Temperature Range --------------------------------------------------------------------−40°C to 125°C Operation Ambient Temperature Range-----------------------------------------------------------------------−40°C to 85°C Electrical Characteristics (Vin=3.6V,Vout=5V,Cin=10uF,Cout=22uF//10uF,L1=2.2uH) Parameter Conditions LP6212 Min Typ Units Max Supply Voltage 2.2 5.5 V Output Voltage Range 2.5 6 V Supply Current(Shutdown) VEN=VOUT=0V,VSW=5V Supply Current VFB=0.7V Feedback Voltage 0.588 Feedback Input Current VFB=1.2V Switching Frequency FREQ=VCC Maximum Duty Cycle 85 3 uA 150 uA 0.6 nA 1200 KHz 90 % 0.4 EN Input High Voltage 1.4 Power mosfet Current Limit High-side On Resistance Version1.0 V 50 EN Input Low Voltage LP6212 –00 0.612 V 6 Vout=3.3V Datasheet May.-2014 A 100 www.Lowpowersemi.com - - V Page 3 of 6 Preliminary Datasheet LP6212 Typical Operating Characteristics Vin=3.3V Vout=5V/0mA Vin=3.3V Vout=5V/100mA Delay time when EN is on IN LP6212 –00 Version1.0 Datasheet May.-2014 Vin=3.3V Vout=5V/50mA Vin=3.3V Vout=5V/2A Efficency VS IOUTPUT www.Lowpowersemi.com - - Page 4 of 6 Preliminary Datasheet LP6212 Operation Information The LP6212 uses a 1.2MHz fixed frequency, voltage. When the inductor current rises sufficiently, the current-mode regulation architecture to regulate the PWM comparator turns off the switch, forcing the output voltage. The LP6212 measures the output inductor current to the output capacitor through the voltage through an external resistive voltage divider internal P-Channel MOSFET rectifier, which forces the and compares that to the internal 0.6V reference to inductor current to decrease. The peak inductor current generate the error voltage to the inductor current to is controlled by the error voltage. Thus the output regulate the output voltage. The use of current-mode voltage controls the inductor current to satisfy the lode. regulation improves transient response and control loop stability. Setting the Output Voltage When the LP6212 is disabled (EN=Low), both power Set the output voltage by selecting the resistive voltage switches are off. There is no current path from SW to divider ratio. The voltage divider drops the output OUT. Therefore, the output voltage discharges to voltage to the 0.6V feedback voltage. Use a 100K ground. When the LP6212 is enabled (EN=High),a resistor for R2 of the voltage divider. Determine the limited start-current charges the output voltage rising to high-side resistor R1 by the equation: SW, then TH part operates in force PWM mode for Vout=(R1/R2+1) x VFB regulating the output voltage to the target value. At the Vout=(R1/R2+1) x 0.6V beginning of each cycle, the N-channel MOSFET switch is turned on, forcing the inductor current to rise, The current at the source of the switch is internally measured and converted to a voltage by the current sense amplifier. That voltage is compared to the error LP6212 –00 Version1.0 Datasheet May.-2014 www.Lowpowersemi.com - - Page 5 of 6 Preliminary Datasheet LP6212 Packaging Information ESOP8 LP6212 –00 Version1.0 Datasheet May.-2014 www.Lowpowersemi.com - - Page 6 of 6