The Qualcomm QDM5577 is a power management integrated circuit (PMIC) used primarily in Mobile Devices and other applications that require efficient power conversion and regulation. Specifically, it provides a combination of features like buck converters, LDOs (low dropout regulators), and power sequencing to manage the power requirements of various components in a system.

If you're looking for equivalent ICs to the Qualcomm QDM5577, you may want to look at similar PMICs from other manufacturers, which provide similar functionality for mobile and embedded applications.

Here are a few alternatives:

1. Texas Instruments (TI) PMICs

• TPS65086: A multi-output power management IC that integrates several DC-DC converters and LDOs. It’s commonly used in systems with multiple voltage rails.

• TPS65988: Another flexible PMIC with power management functions such as buck converters, LDOs, and sequencing for mobile and embedded applications.

2. Analog Devices (formerly Linear Technology)

• LTC3531: A highly integrated PMIC offering a combination of buck converters and LDO regulators, similar to the QDM5577's functionalities.

• LTC3588: A power management IC with multiple outputs and flexibility in terms of voltage regulation, suitable for mobile and portable applications.

3. Maxim Integrated

• MAX77650: A power management IC featuring multiple buck converters, LDOs, and other power functions, designed for applications requiring low power and high efficiency.

• MAX20095: A more advanced PMIC that integrates several voltage regulators and power sequencing features.

4. On Semiconductor (ON Semi)

• NCP4681: This is a PMIC offering low dropout regulators, which can be part of the power management solution in similar designs to the Qualcomm QDM5577.

• FAN5362: A PMIC with a combination of buck regulators, LDOs, and features like power sequencing.

5. Microchip (formerly Atmel)

• MIC5365: A high-performance LDO regulator with features that may be integrated into PMICs like the QDM5577 for low-power applications.

• MCP16502: A highly integrated power management solution with multiple converters and control features.

6. Infineon Technologies

• IR3891: A digital power management IC designed for mobile and embedded systems, with multiple output rails for various components.

7. NXP Semiconductors

• PF1550: A PMIC with multiple power rails, including buck converters and LDOs, targeted for mobile applications similar to Qualcomm's solutions.

Key Considerations for Finding Equivalents:

When searching for equivalent ICs, it’s important to consider the following characteristics:

• Output voltage ranges and current capabilities.

• Number of outputs and their type (buck converters, LDOs, etc.).

• Power sequencing and system control features.

• Thermal performance.

• Package type (especially if space is a constraint in your design).

You may also want to verify the application specifics, like mobile devices, industrial equipment, or automotive, as the requirements will dictate the best PMIC choice. The manufacturers mentioned above all offer a variety of solutions that can replace or function similarly to the QDM5577.