NB679 NB679GD APAF ALT ALTH (Step Down) IC

Description

Key Description:

• NB679 is a fully integrated, synchronous buck converter with a fixed 5 V output, capable of delivering 8 A continuous and 10 A peak current.

• It includes a built-in 5 V LDO (≈ 100 mA) which can be used to power auxiliary circuits.

• Operates over a wide input voltage range: approximately 5.5 V to 28 V.

• Uses Adaptive Constant‑On‑Time (COT) control for fast transient response and simpler loop compensation.

• Employs a DC Auto‑Tune loop to improve load and line regulation.

• Switching frequency: ~700 kHz typical.

• Low quiescent current in standby (~100 µA) when idle.

• Protection features:

  • Over‑current limit (OCP)

  • Over-voltage protection (OVP)

  • Under-voltage protection (UVP)

  • Thermal shutdown

• Has an ultrasonic mode (i.e. switching above audible frequencies) for noise avoidance at light loads.

• Soft-start, output discharge, and latch-off reset (via EN or power cycle) are provided.

• Available in a compact QFN‑12 (2 mm × 3 mm) package.

No Return / No Exchange Policy / No Warranty.
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