Application Notes: AN_SY8088
High Efficiency 1.5MHz, 1A
Synchronous Step Down Regulator
Preliminary Specification
AN_SY8088 Rev. 0.1 Silergy Corp. Confidential- Prepared for Customer Use Only 1
General Description
SY8088 is a high efficiency 1.5MHz synchronous step
down DC/DC regulator IC capable of delivering up to
1A output current. It can operate over a wide input
voltage range from 2.5V to 5.5V and integrate main
switch and synchronous switch with very low R
DS (ON)
to minimize the conduction loss.
Ordering Information
Package Code
Temperature Code
Optional Spec Code
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SY8088
Package Code
Temperature Code
Optional Spec Code
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SY8088
Temperature Range:
-
40°C to 85°C
Features
•
Low R
DS(ON)
for internal switches (top/bottom)
260m
Ω
/170m
Ω
•
2.5~5.5V input voltage range
•
40
µ
A typical quiescent current
•
High light load efficiency
•
High switching frequency 1.5MHz minimizes the
external components
•
Internal soft-start limits the inrush current
•
100% dropout operation
•
RoHS Compliant and Halogen Free
•
Compact package: SOT23-5
Applications
•
Portable Navigation Device
•
Set Top Box
•
USB Dongle
•
Media Player
•
Smart phone
Typical Application
Efficiency vs. Load Current
Load Current (mA)
1
10
100
1000
70
75
80
85
90
95
V
IN
=4.2V,V
OUT
=1.8V
V
IN
=3.3V,V
OUT
=1.8V
V
IN
=5.0V,V
OUT
=1.8V
Figure1. Schematic Diagram Figure2. Efficiency
Ordering Number
Package Type
Note
SY8088AAC
SOT23-5
1A
