Datasheet > MIC33M356

MIC33M356

更新时间： 2023-12-06 20:11:26

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
44页	1028K
描述
The MIC33M356 is a high-efficiency, low-voltage input, 3A Continuous current synchronous step-down

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MIC33M356 数据手册

MIC33M356

3A, Power Module Buck Converter

with HyperLight Load^®Mode and I²C Interface

Features

General Description

• Input Voltage Range: 2.4V to 5.5V

• 3A Output Current

• Multiple Faults Indication through I²C

• I²C Programmable:

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.

- 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-3 ms

- Output discharge when disabled (EN = GND)

• High Efficiency (up to 95%)

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).

• 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 3.4 MHz

The MIC33M356 pinout is compatible with the

Microchip MIC33M350, so that applications can be

easily converted.

• Latch-Off Thermal Shutdown Protection

• Latch-Off Current Limit Protection

• Power Good (PG) Open-Drain Output

• Meets the CISPR32 Class B Emissions

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.

Applications

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.

• Solid-State Drives (SSD)

• Tablets, Notebooks and Ultrabooks

• FPGAs, DSP and Low-Voltage ASIC Power

FIGURE 1:

CISPR32, Class B (V_IN= 5V, V_OUT= 1V,

_OUT= 3A).

Radiated Emissions,

 2020 Microchip Technology Inc.

DS20006349A-page 1

12 3 4 5 6 7...44

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