Step-Down Synchronous DC/DC Converters Compatible with 18V Input and 3A Peak Output XC9280 Series

Torex XC9280

Torex Semiconductor has launched the XC9280 series of step-down synchronous DC/DC converters, which are compatible with 18 V input and 3 A peak output and have a 70% smaller package area than our previous products.

Torex - XC9280

Products in the XC9280 series support 18 V input and 3 A peak output, and have a switching frequency of 1.2 MHz allowing them to be used with small coils (2.2 μH inductance). They employ a compact TSOT-26 package (2.8 × 2.9 × h1.1 mm) with mounting feet, which has a 70% smaller package area per unit than our previous products, as well as a 25% smaller mounting area than our previous products due to their higher switching frequency.

These products have an operating voltage range of 4.5 V – 18 V, and can support output voltages ranging from 1.8 V – 7.0 V. With a quiescent current of 80 μA, their control system uses PFM/PWM automatic switchover control. Even with their compact packages, they can maintain on-resistance values of 0.166 Ω (High Side) and 0.13 Ω (Low Side), a level equivalent to previous products. They are also equipped with a built-in external adjustment soft-start function effective in preventing output capacity inrush and output voltage startup delays.

Typical Performance Characteristics
Typical Performance Characteristics.

XC9280 Series Features

  • 70% smaller package size than previous products (TSOT-26 package: 2.8 × 2.9 × h1.1mm)
  • 25% smaller mounting area than our previous products due to reduced package size
  • Switching frequency of 1.2 MHz allows use with small coils (2.2 μH inductance)
  • 90% efficiency (IOUT = 1000 mA)
  • Soft-start external adjustment is possible
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