ZHCSFE3B March 2016 – November 2017 LM5161
PRODUCTION DATA.
Table 2 summarizes the dual threshold levels of the under-voltage lockout (EN/UVLO) circuit explained inEnable / Undervoltage Lockout (EN/UVLO) .
| EN/UVLO PIN VOLTAGE | VCC REGULATOR | MODE | DESCRIPTION |
|---|---|---|---|
| < 0.35 V | Off | Shutdown | VCC regulator disabled. High and low side FETs disabled. |
| 0.35 V to 1.24 V | On | Standby | VCC regulator enabled. High and low side FETs disabled. |
| > 1.24 V | VCC< VCC(UV) | Standby | VCC regulator enabled. High and low side FETs disabled. |
| VCC> VCC(UV) | Operating | VCC regulator enabled. Switching enabled. |
If an EN/UVLO setpoint is not required, the EN/UVLO pin can be driven by a logic signal as an enable input or connected directly to the VIN pin. If the EN/UVLO is directly connected to the VIN pin, the regulator will begin switching when the VCC UVLO is satisfied.