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.
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
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
Applications
Portable Media Players
Cellular and Smart mobile phone
PDA/DSC
GPS Applications
Marking Information
Please see website.
Typical Application Circuit
VIN
2
3
LP6341XAQVF
Vin
Vin
AGND
GND
PGND
PGND
SW
SW
FB
7
8
5
Vout=(R1/R2+1)*VFB
2.2uH
Vout_1.5A
10uF
22pF
1
R1
22uF
EN
6
4
9
10
R2
LP6341 –05
Ver. 1.5 Datasheet
Feb.-2009
POWER [ LOWPOWER SEMICONDUCTOR INC ]
