MAX17558ATJ+T

Voltage - Supply (Vcc/Vdd):	4.5 V ~ 60 V
Supplier Device Package:	32-TQFN-EP (5x5)
Package / Case:	32-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Current Limit, Enable, Frequency Control, Power Good, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Frequency - Switching:	100kHz ~ 2.2MHz
Series:	--
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

MAX17558ATJ+T is an integrated power management integrated circuit (PMIC) ideal for portable electronic devices. It is specifically designed to provide a DC-DC, buck/boost-converter solution with integrated switching MOSFETs. This application is part of the MAX17558ATJ+T series of PMICs. These devices are part of a family of DC-DC switching controllers that offer an efficient solution for managing power in various applications.

Application Field

The MAX17558ATJ+T devices are best suited for low-voltage power supply applications where high efficiency is required. Examples include smartphones, tablets, portable medical equipment and LED displays. This PMIC is capable of operating from a wide range of input voltages, and providing multiple outputs, with built-in over temperature and over voltage protection. MAX17558ATJ+T features a low quiescent current (Iq) operation allowing for improved system efficiency and long-term steady-state operation. The device also includes an internal power MOSFET, eliminating the need for the user to select and fit external components. This simplifies design requirements, eliminating the need for manual design calculations.

Working Principle

MAX17558ATJ+T is based on a buck/boost-converter topology. A buck/boost-converter is a type of DC-DC converter that can take a wide input voltage range and convert it to an output voltage of either higher or lower value. It works by rapidly switching current through the two MOSFETs to the output capacitor. This creates a stepped up or stepped down voltage output depending on the voltage of the input source. The device also features an innovative current mode control, which provides improved load regulation, low output ripple and fast transient response. The PWM (pulse-width modulation) frequency can also be programmed from 350kHz to 600kHz to optimize efficiency for various load conditions. Additionally, MAX17558ATJ+T features two different power mode selections for improved efficiency. Mode 1 provides the highest efficiency in light load and standby modes, while Mode 2 provides the highest efficiency in heavy load conditions.

Conclusion

MAX17558ATJ+T is a PMIC with an integrated DC-DC switching controller. It is ideal for low-voltage power supply applications where high efficiency is required, such as portable electronic devices, smartphones, tablets, portable medical equipment and LED displays. It features a low quiescent current (Iq) operation with current mode control, improved load regulation, and fast transient response. The device also includes an internal power MOSFET, eliminating the need for manual design calculations. Furthermore, the device has two selectable power modes for improved efficiency.

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