The MIC23350YFT-TR is a high-efficiency, low-voltage input, 3A continuous current synchronous step-down regulator. The Constant-ON-Time (COT)control architecture with HyperLight Load™ provides very high efficiency atlight loads, while still having ultra-fast transient response.The MIC23350YFT-TR output voltage is set by two VSEL (Voltage Selection) pins, between nine different values. This method eliminates the need for an external feedback resistor divider and improves the output voltage setting accuracy. The 2.4V to 5.5V input voltagerange, low shutdown and quiescent currents make the MIC23350YFT-TR ideal forsingle-cell Li-Ion battery-powered applications. The 100% duty cycle capabilityprovides low dropout operation, extending operating range in portable systems. The MIC23350YFT-TR pinout iscompatible with the MIC23356 I2C-based programmable regulator version, suchthat applications can be easily converted. An open-drain Power Good output isprovided to indicate when the output voltage is within 9% of regulation andfacilitates the interface with an MCU, or power sequencing. If set in shutdown(EN=GND), the MIC23350YFT-TR typically draws 1.5 µA, while the output is dischargedthrough 10W pull-down. The MIC23350YFT-TR is available in athermally efficient, 16 Lead 2.5 mm x 2.5 mm x 0.55 mm thin FTQFN package, withan operating junction temperature range from –40°C to +125°C.
Feature
- 2.4V to 5.5V Input Voltage Range
- 3A Continuous Output Current
- Reduced Component Count (No Feedback Resistors)
- High Efficiency (up to 95%)
- Output Discharge when Disabled
- Constant-ON-Time Control with High Switching Frequency:
- 1.2 MHz typical at 1.0V output voltage
- ±1.5% Output Voltage Accuracy Over Line/Load/Temperature Range
- 0.8 ms/V Soft Start Speed
- Supports Safe Start-Up with Pre-Biased Output
- Typical 1.5 µA Shutdown Supply Current
- Low Dropout Operation (100% Duty Cycle)
- Ultra Fast Transient Response
- Latch-Off Thermal Shutdown Protection
- Latch-Off Current Limit Protection
- Power Good (PG) Open-Drain Output
- Pin Strapping Voltage Selection:
- Three-State pins (nine voltage options)
- 0.6V, 0.8V, 0.9V, 1.0V, 1.2V, 1.5V, 1.8V, 2.5V or 3.3V output voltage
