Microchip Technology

The MIC3385 is a high efficiency inductorless buck regulator that features a LowQ® LDO standby mode that draws only 18µA of quiescent current. The MIC3385 requires no external inductor enabling an ultra-low noise, small size, and high efficiency solution for portable power applications. In PWM mode, the MIC3385 operates with a constant frequency 8MHz PWM control. Under light load conditions, such as in system sleep or standby modes, the PWM switching operation can be disabled to reduce switching losses. In this light load LowQ® mode, the LDO maintains the output voltage and draws only 18µA of quiescent current. The LDO mode of operation saves battery life while not introducing spurious noise and high ripple as experienced with pulse skipping or bursting mode regulators. The MIC3385 operates from 2.7V to 5.5V input and features internal power MOSFETs that can supply up to 600mA output current in PWM mode. It can operate with a maximum duty cycle of 100% for use in low-dropout conditions. The MIC3385 is available in the 14-pin 3mm x 3.5mm package with a junction operating range from -40°C to +125°C.

The MIC33M350 is a high-efficiency, low-voltage input, 3A Continuous current synchronous step-down Power Module. 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 MIC33M350 output voltage is set by two VSEL (Voltage Selection) pins, up to 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 MIC33M350 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 MIC33M350 pinout is compatible with the MIC33M356 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 MIC33M350 typically draws 1.5 µA, while the output is discharged through 10 ohm pull-down. The MIC33M350 is available in a thermally efficient, 24 Lead 3mm x 4.5mm x 1.8mm thin QFN package, with an operating junction temperature range from –40°C to +125°C.

The MIC33M356 is a high-efficiency, low-voltage input, 3A Continuous current synchronous step-down Power Module. 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 (-HAYMP and -FAYMP) or between 0.6V and 3.84V, with 10 mV and 20 mV resolution (-SAYMP). Two different default voltage options (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 MIC33M356 typically draws 1.5 µA, while the output is discharged through 10 ohm pull-down (if the output discharge feature is enabled). The MIC33M356 pinout is compatible with the MIC33M350, so that applications can be easily converted. The 2.4V to 5.5V input voltage range, low shutdown and quiescent currents make the MIC33M356 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 MIC33M356 is available in a thermally efficient, 24-Lead 3 mm x 4.5 mm x 1.8 mm QFN package, with an operating junction temperature range from -40°C to +125°C

The MIC33M650 is a high-efficiency, low-voltage input, 6A peak current synchronous step-down Power Module. 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 MIC33M650 output voltage is set by two VSEL (Voltage Selection) pins, up to 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 MIC33M650 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 MIC33M650 pinout is compatible with the MIC33M656 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 MIC33M650 typically draws 1.5 µA, while the output is discharged through 10 ohm pull-down. The MIC33M650 is available in a thermally efficient, 53 Lead 6mm x 10mm x 3mm thin B1QFN package, with an operating junction temperature range from –40°C to +125°C.

The MIC33M656 is a high-efficiency, low-voltage input, 6A peak current synchronous step-down Power Module. 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 (-FAYMP) or between 0.6V and 3.84V, with 10 mV and 20 mV resolution (-SAYMP). Two different default voltage options (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 MIC33M656 typically draws 1.5 µA, while the output is discharged through 10W pull-down (if the output discharge feature is enabled). The MIC33M656 pinout is compatible with the MIC33M650, so that applications can be easily converted. The 2.4V to 5.5V input voltage range, low shutdown and quiescent currents make the MIC33M656 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 MIC33M656 is available in a thermally efficient, 53-Lead 6 mm x 10 mm x 3 mm B1QFN package, with an operating junction temperature range from -40°C to +125°C

The MIC3490 is a 100mA, highly accurate, low dropout regulator with high input voltage and ultra-low ground current. This combination of high input voltage and low ground current makes the MIC3490 ideal for multi-cell Li-Ion battery systems. A µCap LDO design, the MIC3490 is stable with either ceramic or tantalum output capacitors. It only requires a 2.2µF capacitor for stability. Features of the MIC3490 include enable input, thermal shutdown, current limit, reverse battery protection, and reverse leakage protection. Available in fixed and adjustable output voltage versions, the MIC3490 is offered in the SOT-23-5 package with a junction temperature range of -40°C to +125°C. The MIC3490 is pin to pin compatible with LM3490 which has been obsoleted.