BA3938

Regulator ICs System power supply for CD radio cassette players BA3938 The BA3938 is a system power supply IC for use in CD radio cassette players. With one 11V output and interlocked outputs of 8.5V, 5V, 9V, and VCC, the IC is best suited for CD radio cassette players. FApplications CD radio cassette players FFeatures 1) One 11V output (external transistor required) and interlocked outputs of 8.5V, 5V, 9V, and VCC are built in. 2) Output current limit circuit protects the IC against short-circuiting damage. 3) Compact HSIP-B12 package allows a large power dissipation. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 184 Regulator ICs FBlock diagram BA3938 FPin descriptions 185 Regulator ICs FInput / output circuits BA3938 186 Regulator ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 15.0V) BA3938 187 Regulator ICs BA3938 FCircuit operation All outputs rise when voltage is applied on the STANDBY pin. 188 Regulator ICs FApplication example BA3938 FOperation notes (1) Operating power supply voltage When operating within proper ranges of power supply voltage and ambient temperature, most circuit functions are guaranteed. Although the rated values of electrical characteristics cannot be absolutely guaranteed, characteristic values do not change drastically within the proper ranges. (2) Power dissipation (Pd) Refer to the heat reduction characteristics (Fig. 5) and the rough estimation of IC powe...