Silergy SY8088 General Description Manual

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
to minimize the conduction loss.
Ordering Information
SY8088 SY8088 □ □ □ □ ( □□ □ □ □ □ ( □□ □□ ) □ □ □ □ □□ ) □ □ □ □
□□ □□ □□ □□
Temperature Code Temperature Code
Package Code Package Code
Optional Spec Code Optional Spec Code
-
Temperature Range: 40°C to 85°C
Ordering Number Package Type
SY8088AAC SOT23-5
Typical Application
Figure1. Schematic Diagram
AN_SY8088 Rev. 0.1
Application Notes: AN_SY8088
DS (ON)
Note
1A
Silergy Corp. Confidential- Prepared for Customer Use Only
High Efficiency 1.5MHz, 1A
Synchronous Step Down Regulator
Preliminary Specification
Features
• Low R
for internal switches (top/bottom)
DS(ON)
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
Efficiency vs. Load Current
95
90
85
80
75
70
1
Figure2. Efficiency
V =3.3V,V =1.8V
IN OUT
V =4.2V,V =1.8V
IN OUT
V =5.0V,V =1.8V
IN OUT
1000
10 100
Load Current (mA)
1