General Description

The MIC23350 is a high-efficiency, low-voltage, 3A

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 10

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.

Features

• 2.4V to 5.5V Input Voltage Range

• 3A Continuous Output Current

• 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

• 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

Applications

• Solid State Drives (SSD)

• FPGAs, DSP and Low-Voltage ASIC Power