Load Switch IC TCK321G, TCK322G, TCK323G Application & Circuit

Features

• Small package: 0.5 mm pitch WCSP16C (1.9 mm x 1.9 mm, t: 0.5 mm (typ.)), P_D = 1.65 W
• High input voltage: V_IN (Max) = 36 V
• High output current: I_OUT (DC) = 2.0 A, per channel
• Low ON resistance : R_ON = 98 mΩ (typ.) at V_IN = 4.5 V, I_OUT = - 1.0 A
• Over voltage lockout function: 12.0 V at 321G, 15.0 V at 322G, 323G (typ.)
• Under voltage lockout function: 2.9 V (typ.)
• Auto select mode: a function that IC outputs regular input voltage automatically after judging whether a regular voltage of V_INA or V_INB.
• Manual select mode: a function that is selected by VSEL to output voltage.
• FLAG output
• FLAG function at Auto select mode: FLAG signal is output the Low level V_INA or V_INB is selected. (V_INA at 321G/322G, V_INB at 323G)
• FLAG function at Manual select mode: FLAG signal is output the Low level when V_INA or V_INB is out of regular voltage.
• Reverse current blocking per channel (switch off state)
• Inrush current reducing circuit
• Thermal shutdown circuit

Description