MAX4940ACTN+T Allicdata Electronics
Allicdata Part #:

MAX4940ACTN+T-ND

Manufacturer Part#:

MAX4940ACTN+T

Price: $ 0.00
Product Category:

Integrated Circuits (ICs)

Manufacturer: Maxim Integrated
Short Description: IC DGTL PULSER HI-VOLT 56-TQFN
More Detail: Medical Ultrasound Imaging, Sonar PMIC 56-TQFN (8x...
DataSheet: MAX4940ACTN+T datasheetMAX4940ACTN+T Datasheet/PDF
Quantity: 1000
1 +: 0.00000
Stock 1000Can Ship Immediately
$ 0
Specifications
Series: --
Packaging: Tape & Reel (TR) 
Part Status: Active
Applications: Medical Ultrasound Imaging, Sonar
Current - Supply: --
Voltage - Supply: 2.37 V ~ 6 V
Operating Temperature: 0°C ~ 70°C
Mounting Type: Surface Mount
Package / Case: 56-WFQFN Exposed Pad
Supplier Device Package: 56-TQFN (8x8)
Base Part Number: MAX4940
Description

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< div>< p>MAX4940ACTN+T is a Two-Phase, Active-Clamp Reset System-In-Package (SIP) DC/DC synchronous buck controller with integrated MOSFETs. This power management integrated circuit or PMIC is developed for applications that need 2-phase step-down regulation from 2.8V to 0.7V at output current levels up to 20A. The integrated controller allows the user to quickly set up a two-phase buck converter, with all features required for a reliable operation in an efficient, cost-effective package.< p>The MAX4940ACTN+T has integrated two N-channel MOSFETs, which are able to deliver temperatures up to 150°C junction. The die-size of this device is very small compared to discrete solutions which results in less board space and lower system cost. Furthermore, it allows an easy scalability of the solution, depending on the current level requirements of the application.< p>The MAX4940ACTN+T has many features, such as cycle-by-cycle and hiccup current-limit protection. It also includes under voltage lockout (UVLO) that prevents the regulator from operating during start-up and over-current protection (OCP). In addition, the regulator has a soft start that reduces inrush current during start-up, as well as thermal foldback that allows the power stage to operate in pulse-skip mode at high junction temperatures and improves thermal management of the system.< p>The MAX4940ACTN+T uses a two-phase active clamp reset architecture, which includes two integrated N-channel MOSFETs, two current sensing resistors, and a high-side driver. This architecture uses pulse-width modulation (PWM) to control the switching frequency, and synchronous rectification (SR) for higher efficiency. The SR architecture also helps reduce the components count and need for external components.< p>The main application fields for the MAX4940ACTN+T are for powering computer memory, FPGAs, ASICs and processors. It can also be used in storage applications, such as hard drives, SSDs, and other similar products, as it allows a wide range of input voltages with two-phase current sharing capability.< p>The working principle of the MAX4940ACTN+T is as follows. The PWM controller signals the two switches to regulate the load current. The load current is sensed through two external current-sense resistors. The PWM controller operates at a fixed frequency of 300KHz, with a maximum duty cycle of 90%. By regulating the duty-cycle of the switching signals, the output voltage is regulated. Furthermore, the two-phase architecture ensures the load current is shared equally between the two phases, which helps to reduce input and output ripple.< p>In conclusion, the MAX4940ACTN+T is a PMIC that is both efficient and cost-effective. Unlike discrete solutions, this active clamp reset system-in-package is able to make use of a small die-size and allow scalability of the solution depending on the current level requirements. With its integrated MOSFETs, it is able to deliver temperatures up to 150°C junction, and is suitable for applications that need 2-phase step-down regulation from 2.8V to 0.7V at output current levels up to 20A. In terms of its application fields and working principle, the MAX4940ACTN+T can be used to power computer memory, FPGAs, ASICs, processors, and storage applications such as hard drives, SSDs, thanks to its two-phase current sharing capability.

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