SC905A

CDMA Cellular Phone www.DataSheet4U.com IC Power Management POWER MANAGEMENT Description The SC905A is a power management integrated circuit (PMIC) designed for the latest CDMA chip sets. The device provides four general purpose low dropout regulators (LDOs), and five low noise LDOs designed for analog circuits. The VMOT LDO can be used as a general purpose regulator or as an adjustable motor drive output that can supply up to 150mA to drive a vibrator motor. Each LDO’s enable and output voltage are controlled via the I2C bus. The VTCXO output has an external enable pin that can be used instead of the register bit when timing is critical for minimizing sleep current. The VMOT also has an external enable pin for additional flexibility. Initial power-on is achieved by activating either the ON button, the battery charger, or the HFPWR signal, and the PGOOD input is used by the microprocessor to latch power on or disable the device. The thermally-efficient MLPQ-32 package combined with miniature ceramic bypass capacitors minimize required PCB area, making the SC905A ideal for space-conscious portable applications. SC905A Features 9 LDO Linear Regulators CORE: 1.35V - 2.90V @ 300mA ANA: 2.55V - 2.90V @ 200mA PAD: 1.75V - 3.30V @ 300mA RX: 2.75V - 3.10V @ 150mA TX: 2.75V - 3.10V @ 150mA TCXO: 2.75V - 3.10V @ 80mA PLL: 2.75V - 3.10V @ 80mA Camera: 1.75V - 3.30V @ 100mA Motor Drive: 1.75V - 3.30V @ 150mA I2C Interface for Microprocessor Control Less than 1μA Quiescent Current in Shut...