MIC2133 datasheet(1/50 Pages) MICROCHIP

No. de pieza	MIC2133

Descripción Electrónicos	75V Dual Phase, Advanced COT Buck Controller with Selectable Droop Feature and Phase Shedding

PDF	50 Pages

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Fabricante Electrónico	MICROCHIP [Microchip Technology]

Página de inicio	http://www.microchip.com

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DS20006653B-page 1

MIC2133

Features

• Input Voltage Range: 8V to 75V

• Input Down to 2V when VDD = 5V from External

Supply

• Adjustable Output Voltage from 0.6V to 28V

• Adaptive Constant On-Time Control:

- High Delta V operation

- Any Capacitor™ stable

• 0.6V Internal Reference with ±1% Accuracy

• Ripple Injection from Third Node Allows Greater

than 50% Duty Cycles

• HyperLight Load® and Automatic Phase Shedding

• Ability to Interface with External MCU

• Accurate Current Balancing Between Phases

• Accurate 180° Phasing of Outputs

• 100 kHz to 1 MHz Switching Frequency per Phase

• High-Voltage Internal 5V LDO for Single-Supply

Operation

• Secondary LDO to Improve System Efficiency

• Supports Start-up to Pre-Bias Output

• Remote Sense Amplifier for Tight Output Regulation

• Droop Feature to Support Adaptive Voltage

Positioning (AVP) for Improved Load

Transient Response

• Precision Enable Function for Low Standby Current

• External Programmable Soft Start to Reduce

Inrush Current

• Lossless RDSON Current Sensing with NTC

Temperature Compensation or Resistor Sensing

Method

• Programmable Current Limit and Hiccup Mode

Short-Circuit Protection

• Thermal Shutdown with Hysteresis

• -40°C to +125°C Junction Temperature Range

• Compact Size 5 mm x 5 mm, 32-Pin VQFN

Package

• AEC-Q100 Qualified (VAO Suffix)

Applications

• Distributed Power Systems

• Communications/Networking Infrastructure

• Printers, Scanners, Graphic and Video Cards

• FPGA, CPU, Memory, GPU Core Supplies

• Automotive POL

General Description

The MIC2133 is a constant on-time, dual phase,

synchronous buck controller featuring a unique adaptive

on-time control architecture with HyperLight Load and

phase shedding features enabled. The MIC2133 oper-

ates over an input supply range from 8V to 75V. The out-

put voltage is adjustable down to 0.6V with an ensured

accuracy of ±1% at the FBS pin. The device operates

with programmable switching frequency from 100 kHz to

1 MHz per phase.

The Hyper Speed Control architecture supports an ultra-

fast transient response under medium to heavy loads.

The soft start is also programmable externally with a

capacitor, thus, enabling safe start-ups into heavy loads.

The MIC2133 has a remote sense amplifier for accurate

output voltage control.

MIC2133 offers a full suite of protection features to

ensure protection of the IC during Fault conditions.

These include undervoltage lockout to ensure proper

operation, programmable soft start to reduce inrush cur-

rent, overvoltage discharge, Hiccup mode short-circuit

protection and thermal shutdown.

MIC2133 is available in a 5 mm x 5 mm, 32-pin VQFN

package with a -40°C to +125°C operating junction

temperature range.

Package Type

*Includes Exposed Thermal Pad (EP); see Table 3-1.

MIC2133

32-Pin 5 mm x 5 mm VQFN* (ML)

AGND

75V Dual Phase, Advanced COT Buck Controller with

Selectable Droop Feature and Phase Shedding

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