MAX5026EUT+T

Voltage - Output (Min/Fixed):	3V
Base Part Number:	MAX5026
Supplier Device Package:	SOT-23-6
Package / Case:	SOT-23-6
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	500kHz
Current - Output:	260mA (Switch)
Voltage - Output (Max):	36V
Series:	--
Voltage - Input (Max):	11V
Voltage - Input (Min):	3V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Active
Packaging:	Tape & Reel (TR)

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MAX5026EUT+T Application Field and Working Principle

The MAX5026EUT+T is a high voltage, high efficiency step-up DC-DC converter that comes in a Tiny TDFN package. It is a tiny, high-speed, high-efficiency, highly integrated switching regulator, suitable for converting sources from 3 V to 5 V to a regulated output voltage up to 42 V. It utilizes a switch that requires a low control current to drive the external power MOSFET. Designed with an adjustable frequency of 350 kHz to 1.2MHz, the MAX5026EUT+T allows design of a highly efficient, compact, and low-cost portable application.

Features and Benefits

The MAX5026EUT+T features a number of features, making it an ideal choice for a variety of applications. Such features include:• High Efficiency: The step-up DC-DC converter operates with a typical efficiency up to 95%.• Wide Input Voltage Range: The MAX5026EUT+T supports an input voltage range from 3 V to 5 V, allowing it to work from virtually any portable source, including Li-Ion or Lithium-Polymer batteries.• Low Quiescent Current: The MAX5026EUT+T operates with a very low quiescent current consumption of only 160 µA typ.• Fast Transient Response: The MAX5026EUT+T provides very fast transient response, allowing it to efficiently regulate its output voltage when faced with varying loads.• Output Voltage Tracking: The MAX5026EUT+T allows the output voltage to be tracked to the input voltage when the input voltage drops. This allows it to maintain a constant output voltage, even when the input voltage changes.• Low Noise Operation: The MAX5026EUT+T uses switches operating at a fixed frequency. This allows it to produce low-noise output.

Application Field

The MAX5026EUT+T is primarily used in portable consumer applications, primarily cellular handsets to power the RF power amplification stages. Its high efficiency, low noise operation and fast transient response make it an ideal choice for this application.In addition to cellular handsets, the MAX5026EUT+T can be used to provide higher voltage outputs for any application requiring a regulated voltage such as: consumer audio and video equipment, notebook computers, printers, mobile medical devices and portable instruments.

Working Principle

The MAX5026EUT+T is a step-up DC-DC converter, which takes an input voltage and steps it up to a higher voltage. The output voltage can be set to any value within its range by adjusting the output set resistor.The MAX5026EUT+T uses a single switch to convert the low input voltage to a higher output voltage in a process known as "pulse width modulation".When the switch is in the "on" state, current from the input source is allowed to flow through the inductor and up the output capacitor. During this period the inductor stores energy from the source, which is then transferred to the output capacitor when the switch is "on". This process is repeated many times per second allowing the energy to be effectively stored in the output capacitor and providing a much higher output voltage than was initially present at the output of the DC-DC converter.The output voltage is monitored and regulated by the integrated error amplifier, which compares the output voltage to the input voltage. When the output voltage drops too low, the error amplifier adjusts the PWM duty cycle to ensure it remains within specified limits. The MAX5026EUT+T also provides a number of additional features to ensure that the output voltage is stable and regulated at all times. It features a soft-start capability to allow gradual start-up and reduce output inrush current and also features short-circuit and thermal protection to protect against faults and excessive load currents.In summary, the MAX5026EUT+T is an efficient and highly integrated step-up DC-DC converter. It offers a wide input voltage range, low quiescent current, fast transient response, output voltage tracking and low noise operation, making it an ideal choice for a variety of portable applications.

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