General Description
The MIC33M650 is a pin-selectable output voltage,
high-efficiency, low-voltage input, 6A current, synchronous
step-down regulator power module with integrated
inductor. The COT control architecture with HyperLight
Load® mode provides very high efficiency at light loads,
while still having an ultra-fast transient response.
The MIC33M650 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 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 PG 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
10pull-down.
The MIC33M650 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.

Features
• 2.4V to 5.5V Input Voltage Range
• 6A Output Current
• Pin Strapping Voltage Selection:
- Tri-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 (COT) 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
• Meets CISPR32 Class B Emissions
• Package: 53-Lead, 6 mm x 10 mm B1QFN

Applications
• Solid-State Drives (SSD)
• FPGAs, DSP and Low-Voltage ASIC Power