SY8009 查看數據表（PDF） - Unspecified
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SY8009 Datasheet PDF : 6 Pages
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SY8009A/SY8009B
High Efficiency 1.5MHz/1MHz, 1.5A/2A
Synchronous Step Down Regulator
General Description
The SY8009A and SY8009B are high-efficiency, high
frequency synchronous step-down DC-DC regulator
ICs capable of delivering up to 1.5A/2A output
currents. The SY8009 family operate over a wide input
voltage range from 3V to 5.5V and integrate 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 greater than
1MHz switching frequency.
Ordering Information
SY8009□(□□)□
Temperature Code
Package Code
Optional Spec Code
Temperature Range: -40°C to 85°C
Ordering Number
SY8009AAAC
SY8009BABC
SY8009BEBC
Package type
SOT23-5
SOT23-6
SSOT23-6
Note①
1.5A
2A
2A
Features
• Low RDS(ON) for internal switches (top/bottom)
• SY8009A: 180mΩ/120mΩ, 1.5A, SOT23-5
• SY8009B:100mΩ/80mΩ,2.0A
SOT23-6, SSOT23-6
• 3-5.5V input voltage range
• High switching frequency minimizes the external
components
• SY8009A: 1.5MHz
• SY8009B: 1MHz
• Internal softstart limits the inrush current
• 100% dropout operation
• RoHS Compliant and Halogen Free
• Compact package: SOT23-5, SOT23-6 and Super
SOT23-6 are pin-compatible. Other packages are
available upon requests
Applications
• LCD TV
• Set Top Box
• Net PC
• Mini-Notebook PC
• Access Point Router
Typical Applications
ON/ OFF
EN
VIN
IN
LX
CIN
GND
FB
L
R1
R2
VOUT
C1(opt.)
COUT
Figure 1.Schematic diagram
96
94
VOUT=1.8V
92
90
88
86
84
VIN=3.3V
82
VIN=4.2V
VIN=5.5V
80
0
0.4 0.8 1.2 1.6
2
Load Current (A)
Figure 2. Efficiency vs Load Current
SY8009A/B Rev1.0
Silergy Corp. Confidential- Prepared for Customer Use Only 1
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