Application Note: AN_SY8089/SY8089A
High Efficiency 5.5V, 2A continuous, 3A peak, 1MHz Synchronous Step Down Regulator
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Application Note: AN_SY8089/SY8089A
High Efficiency 5.5V, 2A continuous, 3A peak, 1MHz Synchronous Step Down Regulator
General Description
The SY8089 and SY8089A are high-efficiency, high frequency synchronous step-down DC-DC regulator IC capable of delivering up to 2A output current. The SY8089 and SY8089A operate over a wide input
voltage range from 2.7V to 5.5V and integrate main switch and synchronous switch with very low RDS(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.
SY8089 integrates short circuit and over-
voltage latch off protection.
Ordering Information
SY8089 □(□□)□ Temperature Code
Package Code
Optional Spec Code
Temperature Range: -40°C to 85°C
Ordering Number Package type
SY8089AAC
SOT23-5
SY8089AAAC
SOT23-5
Note
Features
Low RDS(ON) for internal switches (top/bottom):110mΩ/80mΩ
2.7-5.5V input
voltage range 2A continuous, 3A peak load current capability 1MHz switching frequency minimizes the external
components Internal softstart limits the inrush current Reliable short circuit protection:
SY8089: Latch off protection SY8089A: Hic-cup mode protection Reliable over-
voltage protection: SY8089: Latch off protection SY8089A: No latch off protection 100% dropout operation RoHS Compliant and Halogen Free Compact package: SOT23-5
Applications
LCD TV Set Top Box Net PC Mini-Notebook PC Access Point Router
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