SY8120I High Efficiency, Fast Response, 2.0A, 18V Input Synchronous Step-Down Regulator 

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The SY8120I is a high efficiency, synchronous stepdown DC/DC converter capable of delivering 2A load current. The SY8120I operates over a wide input voltage range from 4.2V to 18V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. The SY8120I adopts the instant PWM architecture to achieve fast transient responses for high step down applications and high efficiency at light loads. In addition, it operates at a pseudo-constant frequency of 500kHz to minimize the size of inductor and capacitor.

Features:

Low Rds(on) for internal switches (Top/Bottom): 130mΩ/105mΩ

4.2-18V input voltage range

2A output current capability

500kHz switching frequency minimizes the external components

Stable with 10µF COUT and 1.5µH inductor

Instant PWM architecture to achieve dast transient responses

Internal soft-start limits the inrush current

Cycle-by-cycle peak/valley current limitation

Hic-cup mode output short circuit protection

Thermal shutdown with auto-recovery

Compact package SOT23-6 

Applications:

Set-Top Box, Portable TV, DSL Modem, LCD TV, IP CAM, Networking, etc.