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USB Fuse

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Published in issue 356, July 2006

USB Fuse

The MAX1562 is a purpose-built USB current limiter from the chip manufacturers Maxim. The device operates with a supply voltage from 4.0 to 5.5 V with an operating current of typically 40 µA or 3 µA in standby mode. The circuit introduces a very low resistance in the power line (typically 26 mOhm but guaranteed less than 50 mOhm) from an internal MOSFET. The FET gate bias voltage is generated on-chip from a charge pump circuit.

Components

Resistors

R1 = 5k6 (SMD 1206)

R2 = 1k5 (SMD 1206)

P1 = 10k preset

Capacitors

C1 = 1µF (SMD 1206)

C2 = 4µF7 10 V, tantalum

C3 = 220nF (SMD 1206)

Semiconductors

D1 = LED, low current

IC1 = MAX1562ESA

PCB, ref. 060024-1

Click below to download a PDF copy of this article from Elektor magazine.

	Downloads
	PDF Article (060024-UK.pdf)
	10 Elektor Credits
	PCB layout (060024-PCB.pdf)
	10 Elektor Credits
	Order from Elektor
	PCB, bare
	060024-1

Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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