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
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