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PDF LP6343 Data sheet ( Hoja de datos )
| Número de pieza | LP6343 | |
| Descripción | 3A Step-down Converter | |
| Fabricantes | Lowpowersemi | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LP6343 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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Preliminary Datasheet
LP6343
1.5MHz, 3A Step-down Converter With Soft-Start
General Description
The LP6343 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 LP6343 is ideal for
powering portable equipment that runs from a single cell
Lithium-Ion (Li+) battery. The converter can supply
3000mA of load current from a 2.5V to 5.5V input
voltage. The output voltage can be regulated as low as
0.6V. The LP6343 can also run at 100% duty cycle for
low dropout applications.
The LP6343 is available in a 10-lead 3mm*3mm TDFN-10
and EMSOP-10 package and is rated over the -40°C to
85°C temperature range.
Order Information
LP6343□ □ □ □
F: Pb-Free
Package Type
QV: TDFN-10
MS: MSOP-10(E)
Output type
A: Adjustable
Typical Application Circuit
Features
Input Voltage Range: 2.5V to 5.5V
Output Voltage Range: 0.6V to VIN
3000mA 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 or MSOP-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. www.lowpowersemi.com
VIN_5V
22uF
LP6343AQVF
1
2
3
EN
Vin
Vin
4 PGOOD
SW 7
SW 8
2.2uH
22pF
FB 5
Vout=(R1/R2+1)*0.6V
3.3V/3A
R1
45K
22uF*2
R2
10K
LP6343 –00 Version 1.0 Datasheet
Feb.-2010
www.lowpowersemi.com
Page 1 of 12
1 page  
Preliminary Datasheet
LP6343
LP6343 –00 Version 1.0 Datasheet
Feb.-2010
www.lowpowersemi.com
Page 5 of 12
5 Page 
Preliminary Datasheet
Packaging Information
LP6343
LP6343 –00 Version 1.0 Datasheet
Feb.-2010
www.lowpowersemi.com
Page 11 of 12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LP6343.PDF ] | |
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