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4. Short-circuit protection

Installation of the short-circuit protection which protects the output transistor

against short-circuit between VOUT and VSS can be selected in the HM53XX series.

The short-circuit protection controls output current as shown in the typical

characteristics, (1) OUTPUT VOLTAGE versus OUTPUT CURRENT, and suppresses output

current at about 40 mA even if VOUT and VSS pins are short-circuited.

The short-circuit protection can not at the same time be a thermal protection.

Attention should be paid to the Input voltage and the load current under the actual

condition so as not to exceed the power dissipation of the package including the

case for short-circuit.

When the output current is large and the difference between input and output

voltage is large even if not shorted, the short-circuit protection may work and the

output current is suppressed to the specified value. Products without short-circuit

protection can provide comparatively large current by removing a short-circuit

protection.

HM53XX

Shenzhen H&M Semiconductor Co.Ltd

http：//www.hmsemi.com