LP6341 Datasheet, PDF (1/7 Pages) Lowpower Semiconductor inc – 1.5MHz, 1.5A Step-down Converter With Soft-Start

Preliminary Datasheet
LP6341
1.5MHz, 1.5A Step-down Converter With Soft-Start
General Description
The LP6341 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 LP6341 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
0.5/0.6V. The LP6341 can also run at 100% duty cycle
for low dropout applications.
The LP6341 is available in a 10-lead 3mm*3mm DFN-10
package and is rated over the -40°C to 85°C temperature
range.
Order Information
LP6341□ - □ □ □ □ □
F: Pb-Free
Package Type
QV: TDFN-10
Output Voltage Type
12: 1.2V
18: 1.8V
33: 3.3V
A: Adjustable
Feedback Voltage
X:
0.6V
Default: 0.5V
Typical Application Circuit
Features
— Input Voltage Range: 2.5V to 5.5V
— Output Voltage Range: 0.6V to VIN
— 1500mA Load Current on Channel
— Up to 95% Efficiency
— 100% Duty Cycle in Dropout
— < 1 u A Quiescent Current
— 1.5MHz Switching Frequency
— Soft star Function
— Short Circuit Protection
— Current Mode Operation
— Thermal Fault Protection
— 3 m m × 3 m m TDFN-10 Package
— RoHS Compliant and 100% Lead (Pb)-Free
Applications
— Portable Media Players
— Cellular and Smart mobile phone
— PDA/DSC
— GPS Applications
Marking Information
Please see website.
VIN
10uF
LP6341XAQVF
2
3 ^Vin
Vin
7
SW
SW ⁸
1
EN
5
FB
2.2uH
22pF
Vout=(R1/R2+1)*VFB
Vout_1.5A
R1
22uF
R2
LP6341 –05 Ver. 1.5 Datasheet Feb.-2009