Microchip MIC33M356 Handleiding

Bekijk gratis de handleiding van Microchip MIC33M356 (44 pagina’s), behorend tot de categorie Niet gecategoriseerd. Deze gids werd als nuttig beoordeeld door 119 mensen en kreeg gemiddeld 4.5 sterren uit 2 reviews. Heb je een vraag over Microchip MIC33M356 of wil je andere gebruikers van dit product iets vragen? Stel een vraag

 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

Product specificaties