MAX1558ETB+T

MAX1558ETB+T is a Maxim Integrated DC-DC regulator IC (buck converter) used to derive a stable, lower-voltage rail from a higher input in portable/battery-powered designs. The “ETB” suffix indicates an extended-temperature, RoHS-compliant package, and “+T” denotes Tape & Reel packaging for automated assembly. It typically combines a switching regulator architecture with external feedback for an adjustable output and includes protections such as enable/shutdown, overcurrent/short-circuit protection, and thermal shutdown, along with soft-start for stability.
Key points:
- Purpose: efficient step-down power conversion in compact boards
- External components: feedback resistors to set Vout
- Protections: overcurrent, thermal, undervoltage as applicable
- Packaging: RoHS/extended-temp in ETB and Tape & Reel variants
Applications include battery-powered devices, handheld gear, and small power rails in consumer electronics. For exact electrical specs (input range, output voltage options, switching frequency, quiescent current) and pinout, consult the MAX1558 datasheet. I can fetch the latest spec sheet if you’d like.

Here are the typical features of MAX1558ETB+T (from the MAX1558 family; exact specs depend on the variant):
- High-efficiency synchronous buck regulator
- Wide input range (approximately 2.7 V to 5.5 V)
- Output options: fixed or adjustable (external resistors)
- Enables: EN pin; soft-start
- Protection: overcurrent/short-circuit protection and thermal shutdown; UVLO
- Low quiescent current for battery-powered use
- Small package options (e.g., 6-pin SOT23 / 8-pin MSOP)
- Tape-and-reel packaging (+T) and Pb-free (ETB) version
Note: exact output current capability and voltage options vary by specific part/package variant; consult the datasheet for precise numbers.

8-pin surface-mount SOIC package (8-pin SOP). "+T" indicates Tape & Reel packaging.

Manufacturer: Maxim Integrated Products (now part of Analog Devices, Inc.).
What kind of company: An American multinational semiconductor company that designs and manufactures analog and mixed-signal integrated circuits.

High-efficiency synchronous buck regulator for generating low-voltage rails from higher inputs in portable and embedded systems. Applications: notebook/ultrabook and tablet power management; handheld/mobile devices; DSP/FPGA/ASIC supply rails; memory/chipset power in servers and telecom equipment; automotive and industrial electronics needing compact, efficient DC-DC conversion.