SY8113B；High Efficiency, 500kHz, 3A, 18V Input Synchronous Step
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2023-01-14
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Application Note: SY8113B
High Efficiency, 500kHz, 3A, 18V Input
Synchronous Step Down Regulator
AN_SY8113B Rev.0.1 Silergy Corp. Confidential-prepared for Internal Use Only 1
General Description
The SY8113B is a high efficiency 500 kHz
synchronous step-down DC-DC converter capable of
delivering 3A current. The SY8113B operates over a
wide input voltage range from 4.5V to 18V and
integrates 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 500 kHz
switching frequency. It adopts the instant PWM
architecture to achieve fast transient responses for high
step down applications
Ordering Information
Package Code
Temperature Code
Optional Spec Code
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SY8113
Features
•
low R
DS(ON)
for internal switches (top/bottom):
80mΩ/40mΩ
•
4.5-18V input voltage range
•
3A output current capability
•
500 kHz switching frequency
•
Instant PWM architecture to achieve fast transient
responses.
•
Cycle-by-cycle peak current limitation
•
Internal softstart limits the inrush current
• ±
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 Figure 2. Efficiency Figure
Ordering Number Package type
Note
SY8113BADC TSOT23-6 --
Silergy Corp. Confidential-Prepared for
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