SY8089AAAC

Silergy
Application Note: AN_SY8089/SY8089A High Efficiency 5.5V, 2A continuous, 3A peak, 1MHz Synchronous Step Down Regulator General Description Features 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 ...
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Корпус SOT235
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Application Note: AN_SY8089/SY8089A High Efficiency 5.5V, 2A continuous, 3A peak, 1MHz Synchronous Step Down Regulator General Description Features 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 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 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 Applications • • • • • Note LCD TV Set Top Box Net PC Mini-Notebook PC Access Point Router Typical Applications 4 IN LX 3 L1:2.2µH CIN 22µF R1 200k FB 1 ON/ OFF VOUT: 1.8V 5 EN R2 100k GND C1 22pF COUT 22µFх2 Efficiency (%) VIN: 2.7-5.5V 2 Figure 1.Schematic diagram AN_SY8089/A Rev. 0.9A Figure 2. Efficiency vs Load Current Silergy Corp. Confidential- Prepared for Customer Use Only 1 PDF
Документация на SY8089AAC 

Дата модификации: 06.01.2015

Размер: 2.65 Мб

10 стр.

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