LP6301

Preliminary Datasheet LP6301 1.5MHz, 1.5A Step-down Converter With Soft-Start General Description The LP6301 contains a independent 1.5MHz constant frequency, current mode, PWM step-down converters. The converter integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. The LP6301 is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. The converter can supply 1500mA of load current from a 2.5V to 5.5V input voltage. The output voltage can be regulated as low as 0.6V. The LP6301 can also run at 100% duty cycle for low dropout applications. The LP6301 is available in a 16-lead 2mm*2mm DFN package and is rated over the -40°C to 85°C temperature range. Features I nput Voltage Range: 2.5V to 5.5V Output Voltage Range: 0.6V to VIN 1500mA Load Current on Each Channel Up to 95% Efficiency 100% Duty Cycle in Dropout < 1 u A Quiescent Current 1.5MHz Switching Frequency S oft star Function Short Circuit Protection Current Mode Operation Thermal Fault Protection 2 m m × 2 m m TDFN-6 Package RoHS Compliant and 100% Lead (Pb)-Free Order Information LP6301 - □ □ □□ □ F: Pb-Free Package Type QV: TDFN-6 12: 1.2V 18: 1.8V 33: 3.3V A: Adjustable Typical Application Circuit Applications Portable Media Players Cellular and Smart mobile phone PDA/DSC Marking Information Please see website. GPS Applications LP6301 – Ver. 1.0 Datasheet Sep.-2007 Preliminary Datasheet Functional Pin Description LP6301 P i n Desc ript ion Pin NO 1 2 3 4 5 6 PIN NC EN Vin SW GND1 FB No Connect. Enable Control Input. Drive EN1 above 1.5V to turn on the Channel. Drive EN below 0.3V to turn it off (shutdown current < 0.1µA). Supply Input. Switch Mode Connection to Inductor. This pin connects to the drains of the internal main and synchronous power MOSFET switches. Ground 1. Feedback Input. Connect FB to the center point of the external resistor divider. Normal voltage for this pin is 0.6V. DESCRIPTION Function Block Diagram LP6301 – Ver. 1.0 Datasheet Sep.-2007 Preliminary Datasheet Absolute Maximum Ratings LP6301 Input Voltage to GND ------------------------------------------------------------------------------------------- 6V SW to GND (VSW) ---------------------------------------------------------------------------- 0.3V to VIN +0.3V FB to GND (VFB) ------------------------------------------------------------------------------ 0.3V to VIN +0.3V EN EN_BAT to GND (VEN) ------------------------------------------------------------------------0.3V to 6V Operating Junction Temperature Range (TJ) ----------------------------------------------------40℃ to 150℃ Maximum Soldering Temperature (at leads, 1 0sec) ----------------------------------------------------- 260℃ Electrical Characteristics (VIN =VEN,Typical values are TA=25℃ ) Symbol Parameter Conditions Min. 2.5 LP6301 Typ. Max. 5.5 Unit V %/v %/v V µA µA A Step-Down Converter Input Voltage VIN △VOUT △VFB VOUT IQ ISHDN ILIM RDS(ON)H RDS(ON)L ILXLEAK ∆VLine-reg/∆VIN Output Voltage Line Regulation Reference Voltage Line Regulation Output Voltage Range Quiescent Current Shutdown Current P-Channel Current Limit High-Side Switch On Resistance Low-Side Switch On Resistance LX Leakage Current Line Regulation Feedback Threshold Voltage Accuracy FB Leakage Current Oscillator Frequency ILOAD = 0 VINB = 2.5V to 5.5V VINB = 2.5V to 5.5V 0.6 VFB1=VFB2=0V,VIN1/IN2=4.2V ENB = GND 1.6 0.25 0.25 0.4 0.4 VINB 350 1 2 0.4 0.4 1 270 1.8 0.28 0.3 VEN1/EN2=0V, VSW1/SW2=0 or 5V, VIN1/IN2=5V VINB = 2.8V to 5.5V VINB = 3.6V VOUTB = 1 .0V VFB1=VFB2=0.6V VFB1=VFB2=0V From Enable to Output Regulation 0.588 0.2 0.6 30 1.2 1.5 0.7 120 150 20 µA %/V V nA 0.4 0.612 VFB IFB FOSC TS TSD THYS VEN(L) VEN(H) IEN 1.8 MHz µs ℃ ℃ Startup Time Over-Temperature Shutdown Threshold Over-Temperature Shutdown Hysteresis Enable Threshold Low Enable Threshold High Input Low Current 0.4 0.3 1.0 1.5 1 V V µA VINB = VENB = 5.5V -1 LP6301 – Ver. 1.0 Datasheet Sep.-2007 Preliminary Datasheet Typical Operating Characteristics LP6301 LP6301 – Ver. 1.0 Datasheet Sep.-2007 Preliminary Datasheet LP6301 LP6301 – Ver. 1.0 Datasheet Sep.-2007 Preliminary Datasheet LP6301 LP6301 – Ver. 1.0 Datasheet Sep.-2007 Preliminary Datasheet Packaging Information LP6301 LP6301 – Ver. 1.0 Datasheet Sep.-2007