SY8303AAIC 矽力杰-Silergy 高效率,快速响应,同步电机3A级降压DC/DC变换器
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2023-04-20
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SY8303A
High Efficiency Fast Response, 3A, 40V Input
Synchronous Step Down Regulator
SY8303A Rev. 0.9A Silergy Corp. Confidential- Prepared for Customer Use Only 1
© 2018 Silergy Corp. All Rights Reserved.
General Description
The SY8303A develops a high efficiency synchronous
step-down DC/DC converter capable of delivering 3A
load current. The SY8303A operates over a wide input
voltage range from 4.5V to 40V and integrates main
switch and synchronous switch with very low R
DS(ON)
to minimize the conduction loss.
The SY8303A adopts peak current control scheme. The
switching frequency is adjustable from 500 kHz to
2.5MHz using an external resistor. The device also
features ultra low quiescent operating to achieve high
efficiency under light load. And the internal soft-start
limits inrush current during power on.
SY8303A is available in TSOT23-8 package.
Ordering Information
Package Code
Temperature Code
Optional Spec Code
□(□□)□SY8303
Features
Low R
DS(ON)
for Internal Switches (Top/Bottom):
110/70 mΩ
4.5-40V Input Voltage Range
Internal Compensation
Internal 1ms Soft-start Limits the Inrush Current
Adjustable Switching Frequency Range: 500kHz to
2.5MHz
3A Output Current Capability
1.5% 0.6V Reference
Low Quiescent Current
Cycle-by-cycle Peak Current Limitation
Short Circuit Protection
Thermal Shutdown and Auto Recovery
RoHS Compliant and Halogen Free
Compact Package: TSOT23-8
Applications
LCD-TV
SetTop Box
Notebook
Storage
High Power AP Router
Networking
Typical Applications
BS
LX
FB
IN
EN
GND
FS
C
BS
L
C
OUT
R
1
R
2
C
IN
R
FS
ON/
OFF
V
IN
V
OUT
C
1(opt.)
0
20
40
60
80
100
1 10 100 1000 10000
Load Current (mA)
Efficiency vs. Load Current
V
IN
=9V, V
OUT
=5V
Efficiency (%)
V
IN
=12V, V
OUT
=5V
V
IN
=24V, V
OUT
=5V
V
IN
=40V, V
OUT
=5V
Figure 1. Schematic Diagram
Figure 2. Efficiency vs. Load Current
Ordering Number
Package type
Note
SY8303AAIC
TSOT23-8
--
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