MIC23356 Series

3A Buck Regulator with HyperLight Load® & I2C

Catalog

3A Buck Regulator with HyperLight Load® & I2C

Part	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Input (Min) [Min]	Output Type	Voltage - Output (Max) [Max]	Number of Outputs	Topology	Mounting Type	Output Configuration	Voltage - Output (Min/Fixed)	Frequency - Switching	Function	Current - Output	Voltage - Input (Max) [Max]	Supplier Device Package	Package / Case
Microchip Technology MIC23356YFT-TR	-40 °C	125 ¯C	2.4 V	Programmable	1.28 V	1	Buck	Surface Mount	Positive	0.6 V	1.6 MHz 2.2 MHz	Step-Down	3 A	5.5 V	16-FTQFN (2.5x2.5)	16-PowerUFQFN
Microchip Technology MIC23356-FAYFT-TR	-40 °C	125 ¯C	2.4 V	Programmable	1.28 V	1	Buck	Surface Mount	Positive	0.6 V	1.6 MHz 2.2 MHz	Step-Down	3 A	5.5 V	16-FTQFN (2.5x2.5)	16-PowerUFQFN
Microchip Technology MIC23356-SAYFT-TR	-40 °C	125 ¯C	2.4 V	Programmable	3.84 V	1	Buck	Surface Mount	Positive	0.6 V	1.6 MHz 2.2 MHz	Step-Down	3 A	5.5 V	16-FTQFN (2.5x2.5)	16-PowerUFQFN

Catalog

3A Buck Regulator with HyperLight Load® & I2C

Key Features

- Input Voltage Range: 2.4V to 5.5V

- 3A Continuous Output Current

- Multiple Faults Indication through I2C

- High Efficiency (up to 95%)

- Ultra-Fast Transient Response

- ±1.5% Output Voltage Accuracy Over Line/Load/Temperature Range

- Safe Start-Up with Pre-Biased Output

- Typical 1.5 µA Shutdown Supply Current

- Low Dropout (100% Duty Cycle) Operation

- I2C Speed up to 3.4 MHz

- Latch-Off Thermal Shutdown Protection

- Latch-Off Current Limit Protection

- Power-Good (PG) Open-Drain Output

•

• I2C Programmable:* Output Voltage: 0.6V - 1.28V, 5 mV Resolution or 0.6V - 3.84V, 10/20 mV Resolution

• * Slew Rate: 0.2 ms/V - 3.2 ms/V

• * ON time (Switching Frequency)

• * High Side Current Limit: 3.5A - 5A

• * Enable Delay: 0.2 ms - 3 ms

• * Output Discharge when Disabled (EN = GND)

Description

The MIC23656 is a high-efficiency, low-voltage input, 3A peak 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 I2C interface allows programming the output voltage between 0.6V and 1.28V, with 5 mV resolution or between 0.6V and 3.84V, with 10 mV and 20 mV resolution. Three different default voltage options (0.6V, 0.9V and 1.0V) are provided so that the application can be started with a safe voltage level and then moved to high performance modes under I2C control. An open-drain Power Good output facilitates output voltage monitoring and sequencing. If set in shutdown (EN = GND), the MIC23656 typically draws 1.5 µA, while the output is discharged through 10W pull-down (if the output discharge feature is enabled). The MIC23356 pinout is compatible with the MIC23350, so that applications can be easily converted. The 2.4V to 5.5V input voltage range, low shutdown and quiescent currents make the MIC23356 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 MIC23356 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