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发布者:来自网络 发布时间:2014-3-27 阅读:2801次    关键字: DC-DC
AX3811A-2A,18V Synchronous Step-Down Regulator


AX3811A-2A,18V Synchronous Step-Down Regulator DataSheet
 
GENERAL DESCRIPTION
   AX3811A develops high efficiency synchronous stepdown DC-DC converter capable of delivering 2A load current. AX3811A operates over a wide input voltage range from 4.35V to 18V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.
   AX3811A 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 pseudo-constant frequency of 500 kHz under heavy load conditions to minimize the size of inductor and capacitor.

FEATURES
- Low RDS(ON) for internal switches (top/bottom):140/130 mΩ
- 4. 35-18V input voltage range
- 2A load current capability
- Instant PWM architecture to achieve fast transient responses Internal softstart limits the inrush current
- 2% 0.6V reference2
- RoHS Compliant and Halogen Free
- Compact package: SOT23-6

Applications
- Set Top Box
- Portable TV
- Access Point Router
- DSL Modem
- LCD TV

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