MIC23350 Series

3A Buck Regulator with HyperLight Load®

Catalog

3A Buck Regulator with HyperLight Load®

Part	Voltage - Output (Max) [Max]	Topology	Package / Case	Voltage - Input (Max) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Function	Output Type	Current - Output	Voltage - Output (Min/Fixed)	Mounting Type	Supplier Device Package	Output Configuration	Voltage - Input (Min) [Min]	Synchronous Rectifier	Number of Outputs
Microchip Technology MIC23350YFT-TR	3.3 V	Buck	16-PowerUFQFN	5.5 V	-40 °C	125 ¯C	Step-Down	Programmable	3 A	0.6 V	Surface Mount	16-FTQFN (2.5x2.5)	Positive	2.4 V		1

Catalog

3A Buck Regulator with HyperLight Load®

Key Features

- 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

Description

The MIC23350 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 at light loads, while still having ultra-fast transient response. The MIC23350 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 voltage range, low shutdown and quiescent currents make the MIC23350 ideal for single-cell Li-Ion battery-powered applications. The 100% duty cycle capability provides low dropout operation, extending operating range in portable systems. The MIC23350 pinout is compatible with the MIC23356 I2C-based programmable regulator version, such that applications can be easily converted. An open-drain Power Good output is provided to indicate when the output voltage is within 9% of regulation and facilitates the interface with an MCU, or power sequencing. If set in shutdown (EN=GND), the MIC23350 typically draws 1.5 µA, while the output is discharged through 10W pull-down. The MIC23350 is available in a thermally efficient, 16 Lead 2.5 mm x 2.5 mm x 0.55 mm thin FTQFN package, with an operating junction temperature range from –40°C to +125°C.