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
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.
Online power solutions, accelerated
MPLAB Analog Designer (MAD) allows you to choose an existing solution or customize a suggested design. Schematics and component lists are included. View or modify your choice and, with one click, export the design files to MPLAB Mindi Analog Simulator for verification and analysis.
The MIC23350 Evaluation Board is developed to evaluate and demonstrate Microchip Technology’s MIC23350 product. The board features the MIC23350 in a typical Buck application supplied from an external source, between 2.4V – 5.5V. Nine output voltage levels can be set via two Voltage Select pins. Test connectors allow probing, while the board can be loaded up to 3A.
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