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PDF LD7280 Data sheet ( Hoja de datos )
| Número de pieza | LD7280 | |
| Descripción | VFM Step-Up DC/DC Converter | |
| Fabricantes | Leadtrend | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LD7280 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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LD7280
05/08/2006
VFM Step-Up DC/DC Converter
Rev: 00a
General Description
The LD7280 is a VFM step-up DC/DC converter with ultra
low supply current. The CMOS design results in less power
consumption and high capability for battery-powered
instruments.
The LD7280 is a high efficiency step–up DC/DC converter
and takes only three external components to achieve the low
ripple.
As well, using chip enable function will make it possible to
supply current on standby minimized.
Features
• Minimum external component counts
• Ultra low input current in switch off (TYP 5µA)
• ±2% High accuracy of output voltage
• Low ripple and low noise
• Low start-up voltage, 0.85V at no load.
• 80% efficiency with low cost inductor
Applications
• Power source for battery -powered equipment
• Power source for DSC, PDA, Camcorders, VCRs,
Pagers, and Hand-held communication equipment
Typical Application
47µH
VIN
L
L range: 10µH~120µH
D1
5817SL
LX VOUT
NC
CE GND
LD7280
Fig. 1
VOUT
COUT
22µF
Leadtrend Technology Corporation
LD7280-DS-00a May 2007
1
1 page  
Typical Performance Characteristics
(L=47µF, COUT=22µF)
4.0
3.5
3.0 VIN=1.0V
2.5
2.0
VIN=2.5V
VIN=2.0V
VIN=1.5V
1.5
1.0
0.5
0.0 0
Fig. 2
20 40 60 80 100
Output Current (mA)
Output voltage vs. Output Current (mA)
1.6
1.4
1.2 VSTART
1.0
0.8 VHOLD
0.6
0.4
0.2
0.0
0
5 10 15 20
Output Current (mA)
Fig. 4 Start-up/Hold -on Voltage vs. Output Current
LD7280
100
80
VIN=1.0V
60
40
VIN=2.5V
VIN=2.0V VIN=1.5V
20
0
0 20 40 60 80 100
Output Current (mA)
Fig. 3 Efficiency vs. Output Current
3.5
3.4
3.3
3.2
VIN=2V
3.1 IOUT=10mA
3.0
0
20 40 60 80 100
Temperature (°C)
Fig. 5 Output Voltage vs. Temperature
Leadtrend Technology Corporation
LD7280-DS-00a May 2007
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LD7280.PDF ] | |
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