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PDF AN-SY8105 Data sheet ( Hoja de datos )
| Número de pieza | AN-SY8105 | |
| Descripción | Synchronous Step Down Regulator | |
| Fabricantes | Silergy | |
| Logotipo |  |
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Applications Note:AN_SY8105
High Efficiency, 500kHz, 5A, 18V Input
Synchronous Step Down Regulator
General Description
The SY8105 is a high efficiency 500 kHz synchronous
step-down DC-DC converter capable of delivering
5.0A current. The SY8105 operates over a wide input
voltage range from 4.5V to 18V and integrates main
switch and synchronous switch with very low RDS(ON)
to minimize the conduction loss.
Low output voltage ripple and small external inductor
and capacitor sizes are achieved with 500 kHz
switching frequency. It adopts the instant PWM
architecture to achieve fast transient responses for high
step down applications
Ordering Information
SY8105 □(□□)□
Temperature Code
Package Code
Optional Spec Code
Ordering Number Package type Note
SY8105ADC
TSOT23-6
--
Features
• low RDS(ON) for internal switches (top/bottom):
40mΩ/26mΩ
• 4.5-18V input voltage range
• 5.0A output current capability
• 500 kHz switching frequency
• Instant PWM architecture to achieve fast transient
responses.
• Internal softstart limits the inrush current
• Cycle-by-cycle peak current limitation
• 1.5% 0.6V reference
• TSOT23-6 package
Applications
• Set Top Box
• Portable TV
• Access Point Router
• DSL Modem
• LCD TV
Typical Applications
Figure 1. Schematic Diagram
100
90
80
70
60
50
40
30
20
10
0
0.001
Efficiency vs. Load Current
VIN=5V,VOUT=3.3V
VIN=12V,VOUT=3.3V
VIN=16V,VOUT=3.3V
0.01
0.1
1
Load Current (A)
10
Figure 2. Schematic Diagram
AN_SY8105 Rev. 0.9 Silergy Corp. Confidential- Prepared for Customer Use Only
1
1 page  
Typical Performance Characteristics
AN_SY8105
AN_SY8105 Rev. 0.9 Silergy Corp. Confidential- Prepared for Customer Use Only
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AN-SY8105.PDF ] | |
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