MAX5069DAUE-T

Frequency - Switching:	25kHz ~ 1.25MHz
Base Part Number:	MAX5069
Supplier Device Package:	16-TSSOP-EP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Dead Time Control, Enable, Frequency Control
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	No
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	10.8 V ~ 24 V
Output Phases:	1
Number of Outputs:	1
Topology:	Forward Converter
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Overview

MAX5069DAUE-T is a DC/DC switching controller integrated device providing various features to facilitate the design of a switch-mode, non-isolated DC/DC converter. It is designed to control a wide range of topologies, including buck, boost, buck-boost and flyback. This device combines a current-mode control with a wide and adjustable operating frequency range, along with numerous features to provide a highly efficient power supply design that meets the stringent challenges of many energy-driven applications. This device is suitable for use in many applications ranging from portable devices such as drones and mobile phones, to automotive and industrial.

Application Field

MAX5069DAUE-T is ideal for use in power-sensitive systems, mobile devices, automotive and industrial applications. Due to its variable frequency operation, it is especially suitable for transient-load conditions, where a regulated DC bus must be provided under varying conditions. It can also be used as a current-limited low-dropout (LDO) converter and a pulse-frequency modulation (PFM) converter. Furthermore, the device provides excellent performance in wide input and output voltage ranges.

Working Principle

The output voltage is controlled by a constant on-time current-mode control architecture. The oscillator period is set with two external resistors, providing a wide and adjustable operating frequency range. A feedback signal is used to control the inductor switch current and maintain the required output voltage. The output voltage can be programmed by setting two tuning resistors, using an external voltage reference.The device includes a soft-start mechanism to minimize inrush current and peak current limiting to protect the converter from overload condition. The input undervoltage lockout (UVLO) helps to prevent unstable operation and power losses when the input voltage drops below a predetermined threshold. Other features include input supply current consumption below 300 nA and internal temperature protection.

Conclusion

MAX5069DAUE-T is an efficient and reliable DC/DC switching controller suitable for use in power-sensitive systems, mobile devices, automotive and industrial applications. This device is exceptionally suitable for everyday energy-driven applications due to its wide range of adjustable operating frequency, current-mode control, soft-start and current limiting features. In addition, its excellent performance in wide input and output voltage ranges make it an ideal choice for many application sectors.

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