SI8233 Datasheet, PDF (27/57 Pages) Silicon Laboratories – 0.5 AND 4.0 AMP ISODRIVERS

Si823x
3.7.3. Undervoltage Lockout (UVLO)
The UVLO circuit unconditionally drives VO low when VDD is below the lockout threshold. Referring to Figures 37
through 40, upon power up, the Si823x is maintained in UVLO until VDD rises above VDD_UV+. During power down,
the Si823x enters UVLO when VDD falls below the UVLO threshold plus hysteresis (i.e., VDD < VDD_UV+ –
VDD_HYS).
VDDUV+ (Typ)
VDDUV+ (Typ)
3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
Supply Voltage (V_DD - V_SS) (V)
Figure 37. Si823x UVLO Response (5 V)
VDDUV+ (Typ)
8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0 12.5
Supply Voltage (V_DD - V_SS) (V)
Figure 39. Si823x UVLO Response (10 V)
VDDUV+ (Typ)
6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0
Supply Voltage (V_DD - V_SS) (V)
Figure 38. Si823x UVLO Response (8 V)
11.3 11.8 12.3 12.8 13.3 13.8 14.3 14.8 15.3
Supply Voltage (V_DD - V_SS) (V)
Figure 40. Si823x UVLO Response (12.5 V)
Rev. 1.7
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