SNVSBO7A July 2020 – July 2021 LM63610-Q1
PRODUCTION DATA
The LM63610-Q1 incorporates an undervoltage-lockout feature on the output of the internal LDO (at the VCC pin). When VIN reaches about (VPOR-R), the device is ready to receive an EN signal and start up. When VIN falls below (VPOR-F), the device shuts down, regardless of EN status. Since the LDO is in dropout during these transitions, the above values roughly represent the VCC voltage levels during the transitions.
Thermal shutdown is provided to protect the regulator from excessive junction temperature. When the junction temperature reaches about 163°C, the device shuts down; re-start occurs when the temperature falls to about 150°C. An extended input voltage UVLO can also be accomplished as shown in External UVLO.
The LM63610-Q1 features an output voltage discharge FET connected from the SW pin to ground. This FET is activated when the EN input is below VEN-L, or when the output voltage exceeds VRESET-HIGH. This way, the output capacitors are discharged through the power inductor. At output voltages above about 5 V, the discharge current is approximately constant at IPOR or about 1.4 mA. Below this voltage, the FET characteristic looks approximately resistive at a value of 2.5 kΩ.