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Document overview

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Technical content

Features

 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 Pin Configurations TOP VIEW Marking Information Device Marking Package Shipping LP6212 LPS LP6212 XXXX ESOP8 3K/REEL

Preliminary Datasheet LP6212 L P 6 2 1 2 – 0 0 V e r s i o n 1 . 0 D a t a sheet M a y . -2014 www.Lowpowersemi.com - - P a g e 2 o f 6 Functional Pin Description PIN PIN Name Description 1 GND Ground Pin. 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 Power Ground. Function Block Diagram VIN FB LX GND EN

Preliminary Datasheet LP6212 L P 6 2 1 2 – 0 0 V e r s i o n 1 . 0 D a t a sheet M a y . -2014 www.Lowpowersemi.com - - P a g e 3 o f 6 Absolute Maximum Ratings Power Dissipation, PD @ TA = 25°C Package Thermal Resistance Recommended Operating Conditions

Electrical Characteristics

(Vin=3.6V,Vout=5V,Cin=10uF,Cout=22uF//10uF,L1=2.2uH) Parameter Conditions LP6212 Units Min Typ Max Supply Voltage 2.2 5.5 V Output Voltage Range 2.5 6 V Supply Current(Shutdown) VEN=VOUT=0V,VSW=5V 3 uA Supply Current VFB=0.7V 150 uA Feedback Voltage 0.588 0.6 0.612 V Feedback Input Current VFB=1.2V 50 nA Switching Frequency FREQ=VCC 1200 KHz Maximum Duty Cycle 85 90 % EN Input Low Voltage 0.4 V EN Input High Voltage 1.4 V Power mosfet Current Limit 6 A High-side On Resistance Vout=3.3V 100

Preliminary Datasheet LP6212 L P 6 2 1 2 – 0 0 V e r s i o n 1 . 0 D a t a sheet M a y . -2014 www.Lowpowersemi.com - - P a g e 4 o f 6 Typical Operating Characteristics V i n = 3 . 3 V V o u t = 5 V / 0 m A V i n = 3 . 3 V V o u t =5V/50mA V i n = 3 . 3 V V o u t = 5 V / 1 0 0 m A V i n = 3 . 3 V Vout=5V/2A Delay time when EN is on IN E f f i c e n c y V S IOUTPUT

Preliminary Datasheet LP6212 L P 6 2 1 2 – 0 0 V e r s i o n 1 . 0 D a t a sheet M a y . -2014 www.Lowpowersemi.com - - P a g e 5 o f 6 Operation Information The LP6212 uses a 1.2MHz fixed frequency, current-mode regulation architecture to regulate the output voltage. The LP6212 measures the output voltage through an external resistive voltage divider and compares that to the internal 0.6V reference to generate the error voltage to the inductor current to regulate the output voltage. The use of current-mode regulation improves transient response and control loop stability. When the LP6212 is disabled (EN=Low), both power switches are off. There is no current path from SW to OUT. Therefore, the output voltage discharges to ground. When the LP6212 is enabled (EN=High),a limited start-current charges the output voltage rising to SW, then TH part operates in force PWM mode for regulating the output voltage to the target value. At the 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 voltage. When the inductor current rises sufficiently, the PWM comparator turns off the switch, forcing the inductor current to the output capacitor through the internal P-Channel MOSFET rectifier, which forces the inductor current to decrease. The peak inductor current is controlled by the error voltage. Thus the output voltage controls the inductor current to satisfy the lode. Setting the Output Voltage Set the output voltage by selecting the resistive voltage divider ratio. The voltage divider drops the output voltage to the 0.6V feedback voltage. Use a 100K resistor for R2 of the voltage divider. Determine the high-side resistor R1 by the equation: V o u t = ( R 1 / R 2 + 1 ) x V F B Vout=(R1/R2+1) x 0.6V

Preliminary Datasheet LP6212 L P 6 2 1 2 – 0 0 V e r s i o n 1 . 0 D a t a sheet M a y . -2014 www.Lowpowersemi.com - - P a g e 6 o f 6 Packaging Information ESOP8