Microchip MIC33M356 Bedienungsanleitung
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2020 Microchip Technology Inc.DS20006349A-page 1
MIC33M356
Features
•Input Voltage Range: 2.4V to 5.5V
•3A Output Current
•Multiple Faults Indication through I
2C
• I2C Programmable:
-Output voltage:
0.6V to 1.28V at 5 mV resolution or
0.6V to 3.84V, 10 and 20 mV resolution
-Slew rate: 0.2 ms/V to 3.2 ms/V
-On-time (switching frequency)
-High-side current limit: 3.5A or 5A
-Enable delay: 0.2 ms-3ms
-Output discharge when disabled (EN = GND)
•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 3.4MHz
•Latch-Off Thermal Shutdown Protection
•Latch-Off Current Limit Protection
•Power Good (PG) Open-Drain Output
•Meets the CISPR32 Class B Emissions
Applications
•Solid-State Drives (SSD)
•Tablets, Notebooks and Ultrabooks
•FPGAs, DSP and Low-Voltage ASIC Power
General Description
The Microchip MIC33M356 is a I2C programmable,
high-efficiency, low-voltage input, 3A current, synchro-
nous step-down regulator power module with
integrated inductor. The Constant On-Time (COT)
control architecture with HyperLight Load
®mode
provides very high efficiency at light loads, while still
having ultra-fast transient response.
The I2C interface allows programming the output volt-
age between 0.6V and 1.28V, with 5 mV resolution or
between 0.6V and 3.84V, with 10 mV and 20 mV reso-
lution. 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 of
current, while the output is discharged through a 10
pull-down resistor (if the output discharge feature is
enabled).
The MIC33M356 pinout is compatible with the
Microchip 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, 3.0 mm × 4.5 mm × 1.8 mm QFN package,
with an operating junction temperature range of -40°C
to +125°C.
FIGURE 1:Radiated Emissions,
CISPR32, Class B (VIN = 5V, VOUT= 1V,
IOUT = 3A).
3A, Power Module Buck Converter
with HyperLight Load® Mode and I2C Interface
Produktspezifikationen
| Marke: | Microchip |
| Kategorie: | Nicht kategorisiert |
| Modell: | MIC33M356 |
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