Shivaki STV-24LEDGR7, Руководство по обслуживанию

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SY8009A/SY8009B
High Efficiency 1.5MHz/1MHz, 1.5A/2A
Synchronous Step Down Regulator
Preliminary Spec
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 R
DS(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
C: - 40
°
C~85
°
C
Package Code:
AA:SOT23-5
EB:SSOT23-6
Spec Code
Features
•
low Rds(on) for internal switches (top/bottom)
SY8009A: 200mohm/150mohm, 1.5A,
SOT23-5
SY8009B:150mohm/120mohm,2.0A,
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 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
LX
IN
GND
FB
EN V
IN
C
IN
L
R
1
R
2
V
OUT
C
OUT
C
1
(opt.)
E
ff
ic
ie
n
cy
(
%
)
Figure 1 Figure2 Efficiency vs Load Current
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