ZHCSE67B October 2015 – July 2018 TLV62085
PRODUCTION DATA.
The switch current limit prevents the device from high inductor current and from drawing excessive current from the battery or input voltage rail. Excessive current might occur with a shorted or saturated inductor or a heavy load or shorted output circuit condition. If the inductor current reaches the threshold ILIM, the high-side MOSFET is turned off and the low-side MOSFET is turned on to ramp down the inductor current. When this switch current limits is triggered 32 times, the device stops switching and enables the output discharge. The device then automatically starts a new start-up after a typical delay time of 66 µs has passed. This is named HICCUP short-circuit protection. The device repeats this mode until the high load condition disappears.