EN
ET81211
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General Description
The ET81211 is a highly integrated, wide input voltage, 2A output synchronous buck convertor. The device is optimized to operate with minimum external component counts and also optimized to achieve low standby current.
This convertor adopts adaptive constant-on-time (ACOT) structure, and provides a fast transient response. It also supports both low-equivalent series resistance (ESR) output capacitors and ultra-low ESR ceramic capacitors with no external compensation components.
During light load operation, ET81211 operates in pulse frequency modulation (PFM) mode, which maintains high efficiency.
ET81211 is available in a SOT23-6 package.
Specification
Sample
Features
- 2A Converters Integrated 120mΩ and 80mΩ FET
- ACOT Mode Control with Fast Transient Response
- Input Voltage Range: 4.5V to 17V
- Output Voltage Range: 0.76V to 7V
- PFM Mode During Light Load Operation
- 580kHz Switching Frequency
- Low Shutdown Current Less than 5µA
- Start-up from Pre-Biased Output Voltage
- Cycle-by-Cycle Over-Current Limit
- Hiccup-Mode Over-Current Protection
- Non-Latch UVP and TSD Protections
- Fixed Soft Start: 1.0ms
