View ba9708k datasheet:

Regulator ICs 3-channel switching regulator BA9708K The BA9708K, a 3-channel switching regulator that uses a pulse width modulation (PWM) system, can drive all channel PNP transistors directly. FApplications VCRs and other portable equipment FFeatures 1) Reference voltage precision is ± 1%. 3) Triangular waves can be externally synchronized. 2) Output stages are based on the push-pull method 4) Pins allow ON / OFF control of channel 3 only, or all (resembling the totem-pole method), and ON / OFF channels at once. currents can be set independently. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 295 Regulator ICs BA9708K FBlock diagram 296 Regulator ICs BA9708K FPin descriptions 297 Regulator ICs BA9708K FElectrical characteristic