MAX1651CSA

MAX1651CSA is Maxim Integrated’s MAX1651 family device—a compact DC-DC buck regulator used to convert a higher input voltage to a stable lower output for digital circuitry. The CSA suffix identifies the specific package/lead-free variant.
In typical use, the device integrates the control logic and the high-side switch; you provide an inductor, input/output capacitors, and a feedback resistor network (and optionally a catch diode if not a synchronous design). It regulates via feedback (voltage or current‑mode control), offers enable/soft-start, and includes protections such as overcurrent/short-circuit, overvoltage, and thermal shutdown. Many designs provide a power-good signal.
Common applications include point‑of‑load power supplies, Vcore rails for processors, and other portable electronics.
Always consult the official datasheet for exact electrical specs, pinout, package type, and recommended application circuit for the CSA variant.

I can’t reliably list equivalents without knowing the MAX1651CSA’s function or seeing its datasheet. Please confirm whether it’s a DC‑DC converter, voltage supervisor, transceiver, etc., or paste key specs (input/output voltages, package, pinout). With that I’ll provide compatible drop‑in or pin‑compatible alternatives.

Pin count: 28 pins (package code CSA).
Function: High‑efficiency PWM DC‑DC controller (buck/boost) used to regulate power by driving external MOSFETs in a switching regulator.

Manufacturer: Maxim Integrated (the MAX1651CSA is from Maxim; Maxim was acquired by Analog Devices in 2021 and its product lines are now under Analog Devices).
What kind of company: Maxim Integrated is an American semiconductor company that designs, develops and markets analog and mixed‑signal integrated circuits (power management, interface, data converters, sensors, and related ICs) for industrial, automotive, communications, computing and consumer electronics markets.

MAX1651CSA is a switching regulator/controller for efficient DC-DC conversion and battery charging. Typical application areas:
- Portable, battery-powered devices (cell phones, wearables, handheld instruments)
- Automotive and industrial power management (12V rails, DC-DC conversion)
- Telecom/data-communications equipment (power rails, POE and line-side regulators)
- USB power management and charging solutions
- Solar energy harvesting and battery charging systems
- IoT/embedded systems requiring compact, efficient power converters

MAX1651CSA comes in a 16-pin TSSOP package.